Repository: knative/pkg
Pull request #1493 (2020-07-15 00:32:47)

Add component name as the metric prefix for opencensus exporter
And update the ocagent version to include the functionality.

knative-prow-robot: [APPROVALNOTIFIER] This PR is **NOT APPROVED**

This pull-request has been approved by: *<a href="https://github.com/knative/pkg/pull/1493#" title="Author self-approved">jjzeng-seattle</a>*
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jjzeng-seattle: /assign @evankanderson 
knative-metrics-robot: The following is the coverage report on the affected files.
Say `/test pull-knative-pkg-go-coverage` to re-run this coverage report

File | Old Coverage | New Coverage | Delta
---- |:------------:|:------------:|:-----:
[metrics/opencensus_exporter.go](https://storage.cloud.google.com/knative-prow/pr-logs/pull/knative_pkg/1493/pull-knative-pkg-go-coverage/1283197965938200576/artifacts/line-cov.html#file0) | 69.7% | 71.4% | 1.7

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Test name | Commit | Details | Rerun command
--- | --- | --- | ---
pull-knative-pkg-unit-tests | cbfd730cb12e5a2c1bfe6a970cd152185c947ce6 | [link](https://prow.knative.dev/view/gcs/knative-prow/pr-logs/pull/knative_pkg/1493/pull-knative-pkg-unit-tests/1283197965938200577) | `/test pull-knative-pkg-unit-tests`

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pull-knative-pkg-unit-tests | cbfd730cb12e5a2c1bfe6a970cd152185c947ce6 | [link](https://prow.knative.dev/view/gcs/knative-prow/pr-logs/pull/knative_pkg/1493/pull-knative-pkg-unit-tests/1283197965938200577) | `/test pull-knative-pkg-unit-tests`
pull-knative-pkg-build-tests | cbfd730cb12e5a2c1bfe6a970cd152185c947ce6 | [link](https://prow.knative.dev/view/gcs/knative-prow/pr-logs/pull/knative_pkg/1493/pull-knative-pkg-build-tests/1283197965938200579) | `/test pull-knative-pkg-build-tests`

[Full PR test history](https://gubernator.knative.dev/pr/knative_pkg/1493). [Your PR dashboard](https://gubernator.knative.dev/pr/jjzeng-seattle).

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knative-prow-robot: @jjzeng-seattle: The following tests **failed**, say `/retest` to rerun all failed tests:

Test name | Commit | Details | Rerun command
--- | --- | --- | ---
pull-knative-pkg-build-tests | cbfd730cb12e5a2c1bfe6a970cd152185c947ce6 | [link](https://prow.knative.dev/view/gcs/knative-prow/pr-logs/pull/knative_pkg/1493/pull-knative-pkg-build-tests/1283197965938200579) | `/test pull-knative-pkg-build-tests`
pull-knative-pkg-unit-tests | cbfd730cb12e5a2c1bfe6a970cd152185c947ce6 | [link](https://prow.knative.dev/view/gcs/knative-prow/pr-logs/pull/knative_pkg/1493/pull-knative-pkg-unit-tests/1283205012259868672) | `/test pull-knative-pkg-unit-tests`

[Full PR test history](https://gubernator.knative.dev/pr/knative_pkg/1493). [Your PR dashboard](https://gubernator.knative.dev/pr/jjzeng-seattle).

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knative-prow-robot: @jjzeng-seattle: The following tests **failed**, say `/retest` to rerun all failed tests:

Test name | Commit | Details | Rerun command
--- | --- | --- | ---
pull-knative-pkg-unit-tests | cbfd730cb12e5a2c1bfe6a970cd152185c947ce6 | [link](https://prow.knative.dev/view/gcs/knative-prow/pr-logs/pull/knative_pkg/1493/pull-knative-pkg-unit-tests/1283205012259868672) | `/test pull-knative-pkg-unit-tests`
pull-knative-pkg-build-tests | cbfd730cb12e5a2c1bfe6a970cd152185c947ce6 | [link](https://prow.knative.dev/view/gcs/knative-prow/pr-logs/pull/knative_pkg/1493/pull-knative-pkg-build-tests/1283205012259868673) | `/test pull-knative-pkg-build-tests`

[Full PR test history](https://gubernator.knative.dev/pr/knative_pkg/1493). [Your PR dashboard](https://gubernator.knative.dev/pr/jjzeng-seattle).

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Test name | Commit | Details | Rerun command
--- | --- | --- | ---
pull-knative-pkg-build-tests | cbfd730cb12e5a2c1bfe6a970cd152185c947ce6 | [link](https://prow.knative.dev/view/gcs/knative-prow/pr-logs/pull/knative_pkg/1493/pull-knative-pkg-build-tests/1283217218791804932) | `/test pull-knative-pkg-build-tests`

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evankanderson: It looks like you need to run `update-codegen.sh` as well.
knative-prow-robot: [APPROVALNOTIFIER] This PR is **NOT APPROVED**

This pull-request has been approved by: *<a href="https://github.com/knative/pkg/pull/1493#" title="Author self-approved">jjzeng-seattle</a>*
To complete the [pull request process](https://git.k8s.io/community/contributors/guide/owners.md#the-code-review-process), please assign **evankanderson**
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knative-metrics-robot: The following is the coverage report on the affected files.
Say `/test pull-knative-pkg-go-coverage` to re-run this coverage report

File | Old Coverage | New Coverage | Delta
---- |:------------:|:------------:|:-----:
[metrics/opencensus_exporter.go](https://storage.cloud.google.com/knative-prow/pr-logs/pull/knative_pkg/1493/pull-knative-pkg-go-coverage/1283444590602358784/artifacts/line-cov.html#file0) | 69.7% | 71.4% | 1.7

knative-prow-robot: @jjzeng-seattle: The following tests **failed**, say `/retest` to rerun all failed tests:

Test name | Commit | Details | Rerun command
--- | --- | --- | ---
pull-knative-pkg-build-tests | cbfd730cb12e5a2c1bfe6a970cd152185c947ce6 | [link](https://prow.knative.dev/view/gcs/knative-prow/pr-logs/pull/knative_pkg/1493/pull-knative-pkg-build-tests/1283217218791804932) | `/test pull-knative-pkg-build-tests`
pull-knative-pkg-unit-tests | bef4c07022e262eb37e34cf9675861daab08f782 | [link](https://prow.knative.dev/view/gcs/knative-prow/pr-logs/pull/knative_pkg/1493/pull-knative-pkg-unit-tests/1283444590606553090) | `/test pull-knative-pkg-unit-tests`

[Full PR test history](https://gubernator.knative.dev/pr/knative_pkg/1493). [Your PR dashboard](https://gubernator.knative.dev/pr/jjzeng-seattle).

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jjzeng-seattle: /retest
jjzeng-seattle: > It looks like you need to run `update-codegen.sh` as well.

Done.
evankanderson: One comment -- if you think that we don't need the additional prefixes on the OpenCensus exported variable names, I'm happy to let that be, but now that I see what's going on, I feel like we should include the information we have, and Stackdriver can strip off the `mc.domain` part for custom metric names if needed.
evankanderson: Note that this will cause a change in the opencensus-generated names from components, from (for example):

`request_count`

to

`knative.dev/serving/activator/request_count`

I think this is correct, because it makes it easier to select out metrics that are Knative-related, as opposed to needing to hunt under other names.

Note that we're not doing this for the legacy Prometheus exporter, which never included this information in its names.
evankanderson: Also a note of record; I'm not sure that doing this with a (process-wide) prefix rather than in the actual metric definition sites is the right way to go, but I'd prefer not to upend the whole apple cart at once, no matter what it looks like.
evankanderson: If we decide that we do want `knative.dev/serving/controller/work_queue_depth` and `knative.dev/eventing/controller/work_queue_depth` to end up with the same metric name, we can remove or empty the `METRICS_DOMAIN` later. My preference would be not to remove that information until we're sure that those two should be the same metric name.
knative-metrics-robot: The following is the coverage report on the affected files.
Say `/test pull-knative-pkg-go-coverage` to re-run this coverage report

File | Old Coverage | New Coverage | Delta
---- |:------------:|:------------:|:-----:
[metrics/opencensus_exporter.go](https://storage.cloud.google.com/knative-prow/pr-logs/pull/knative_pkg/1493/pull-knative-pkg-go-coverage/1285058098003709952/artifacts/line-cov.html#file0) | 69.7% | 75.0% | 5.3

knative-prow-robot: @jjzeng-seattle: The following test **failed**, say `/retest` to rerun all failed tests:

Test name | Commit | Details | Rerun command
--- | --- | --- | ---
pull-knative-pkg-unit-tests | 2980ebeb77cd78b2193ae8cf24fc6c2eaec181ea | [link](https://prow.knative.dev/view/gcs/knative-prow/pr-logs/pull/knative_pkg/1493/pull-knative-pkg-unit-tests/1285058097999515649) | `/test pull-knative-pkg-unit-tests`

[Full PR test history](https://gubernator.knative.dev/pr/knative_pkg/1493). [Your PR dashboard](https://gubernator.knative.dev/pr/jjzeng-seattle).

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jjzeng-seattle: /retest
knative-prow-robot: @jjzeng-seattle: The following test **failed**, say `/retest` to rerun all failed tests:

Test name | Commit | Details | Rerun command
--- | --- | --- | ---
pull-knative-pkg-unit-tests | 2980ebeb77cd78b2193ae8cf24fc6c2eaec181ea | [link](https://prow.knative.dev/view/gcs/knative-prow/pr-logs/pull/knative_pkg/1493/pull-knative-pkg-unit-tests/1285067157226393600) | `/test pull-knative-pkg-unit-tests`

[Full PR test history](https://gubernator.knative.dev/pr/knative_pkg/1493). [Your PR dashboard](https://gubernator.knative.dev/pr/jjzeng-seattle).

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jjzeng-seattle: /retest
knative-prow-robot: @jjzeng-seattle: The following test **failed**, say `/retest` to rerun all failed tests:

Test name | Commit | Details | Rerun command
--- | --- | --- | ---
pull-knative-pkg-unit-tests | 2980ebeb77cd78b2193ae8cf24fc6c2eaec181ea | [link](https://prow.knative.dev/view/gcs/knative-prow/pr-logs/pull/knative_pkg/1493/pull-knative-pkg-unit-tests/1285257662996418560) | `/test pull-knative-pkg-unit-tests`

[Full PR test history](https://gubernator.knative.dev/pr/knative_pkg/1493). [Your PR dashboard](https://gubernator.knative.dev/pr/jjzeng-seattle).

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knative-metrics-robot: The following is the coverage report on the affected files.
Say `/test pull-knative-pkg-go-coverage` to re-run this coverage report

File | Old Coverage | New Coverage | Delta
---- |:------------:|:------------:|:-----:
[metrics/opencensus_exporter.go](https://storage.cloud.google.com/knative-prow/pr-logs/pull/knative_pkg/1493/pull-knative-pkg-go-coverage/1285276915225071616/artifacts/line-cov.html#file0) | 69.7% | 75.0% | 5.3

knative-prow-robot: [APPROVALNOTIFIER] This PR is **APPROVED**

This pull-request has been approved by: *<a href="https://github.com/knative/pkg/pull/1493#pullrequestreview-451929707" title="Approved">evankanderson</a>*, *<a href="https://github.com/knative/pkg/pull/1493#" title="Author self-approved">jjzeng-seattle</a>*

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<details >
Needs approval from an approver in each of these files:

- ~~[OWNERS](https://github.com/knative/pkg/blob/master/OWNERS)~~ [evankanderson]

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knative-prow-robot: New changes are detected. LGTM label has been removed.
knative-metrics-robot: The following is the coverage report on the affected files.
Say `/test pull-knative-pkg-go-coverage` to re-run this coverage report

File | Old Coverage | New Coverage | Delta
---- |:------------:|:------------:|:-----:
[metrics/opencensus_exporter.go](https://storage.cloud.google.com/knative-prow/pr-logs/pull/knative_pkg/1493/pull-knative-pkg-go-coverage/1285317055083450368/artifacts/line-cov.html#file0) | 69.7% | 72.2% | 2.5

knative-prow-robot: @jjzeng-seattle: The following test **failed**, say `/retest` to rerun all failed tests:

Test name | Commit | Details | Rerun command
--- | --- | --- | ---
pull-knative-pkg-unit-tests | 96a340103f67e9bf31a2177e26d546a86d391597 | [link](https://prow.knative.dev/view/gcs/knative-prow/pr-logs/pull/knative_pkg/1493/pull-knative-pkg-unit-tests/1285317055083450369) | `/test pull-knative-pkg-unit-tests`

[Full PR test history](https://gubernator.knative.dev/pr/knative_pkg/1493). [Your PR dashboard](https://gubernator.knative.dev/pr/jjzeng-seattle).

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evankanderson: /hold cancel
/lgtm
/retest

Patch:
diff --git a/go.mod b/go.mod
index 6b5232862..973d14fa9 100644
--- a/go.mod
+++ b/go.mod
@@ -5,7 +5,7 @@ go 1.14
 require (
 	cloud.google.com/go v0.61.0
 	cloud.google.com/go/storage v1.10.0
-	contrib.go.opencensus.io/exporter/ocagent v0.6.1-0.20200121232419-b3d61dbd6252
+	contrib.go.opencensus.io/exporter/ocagent v0.7.1-0.20200615190824-f8c219d2d895
 	contrib.go.opencensus.io/exporter/prometheus v0.2.1-0.20200609204449-6bcf6f8577f0
 	contrib.go.opencensus.io/exporter/stackdriver v0.13.2
 	contrib.go.opencensus.io/exporter/zipkin v0.1.1
@@ -27,7 +27,6 @@ require (
 	github.com/google/uuid v1.1.1
 	github.com/googleapis/gnostic v0.4.0 // indirect
 	github.com/gorilla/websocket v1.4.2
-	github.com/grpc-ecosystem/grpc-gateway v1.12.1 // indirect
 	github.com/hashicorp/golang-lru v0.5.4
 	github.com/influxdata/tdigest v0.0.0-20181121200506-bf2b5ad3c0a9 // indirect
 	github.com/kballard/go-shellquote v0.0.0-20180428030007-95032a82bc51
diff --git a/go.sum b/go.sum
index f97863999..1810511cc 100644
--- a/go.sum
+++ b/go.sum
@@ -53,8 +53,8 @@ code.gitea.io/sdk/gitea v0.12.0/go.mod h1:z3uwDV/b9Ls47NGukYM9XhnHtqPh/J+t40lsUr
 contrib.go.opencensus.io/exporter/aws v0.0.0-20181029163544-2befc13012d0/go.mod h1:uu1P0UCM/6RbsMrgPa98ll8ZcHM858i/AD06a9aLRCA=
 contrib.go.opencensus.io/exporter/ocagent v0.4.12/go.mod h1:450APlNTSR6FrvC3CTRqYosuDstRB9un7SOx2k/9ckA=
 contrib.go.opencensus.io/exporter/ocagent v0.5.0/go.mod h1:ImxhfLRpxoYiSq891pBrLVhN+qmP8BTVvdH2YLs7Gl0=
-contrib.go.opencensus.io/exporter/ocagent v0.6.1-0.20200121232419-b3d61dbd6252 h1:78QgIAE2FeU2klDzCuergwddNYzuC9EihGyR2Eq+/XM=
-contrib.go.opencensus.io/exporter/ocagent v0.6.1-0.20200121232419-b3d61dbd6252/go.mod h1:COXDBN+YYlzrujnt2M1Ym3DBY4O3GlMujpfhzvS27Rk=
+contrib.go.opencensus.io/exporter/ocagent v0.7.1-0.20200615190824-f8c219d2d895 h1:bXMXgHq+WAIkI2dQivk1yMyKVVqMj8emLmhEqQghPWw=
+contrib.go.opencensus.io/exporter/ocagent v0.7.1-0.20200615190824-f8c219d2d895/go.mod h1:IshRmMJBhDfFj5Y67nVhMYTTIze91RUeT73ipWKs/GY=
 contrib.go.opencensus.io/exporter/prometheus v0.1.0/go.mod h1:cGFniUXGZlKRjzOyuZJ6mgB+PgBcCIa79kEKR8YCW+A=
 contrib.go.opencensus.io/exporter/prometheus v0.2.1-0.20200609204449-6bcf6f8577f0 h1:2O3c1g5CzMc1+Uah4Waot9Obm0yw70VXJzWaP6Fz3nw=
 contrib.go.opencensus.io/exporter/prometheus v0.2.1-0.20200609204449-6bcf6f8577f0/go.mod h1:MjHoxkI7Ny27toPeFkRbXbzVjzIGkwOAptrAy8Mxtm8=
@@ -159,7 +159,7 @@ github.com/andreyvit/diff v0.0.0-20170406064948-c7f18ee00883/go.mod h1:rCTlJbsFo
 github.com/andybalholm/brotli v0.0.0-20190621154722-5f990b63d2d6/go.mod h1:+lx6/Aqd1kLJ1GQfkvOnaZ1WGmLpMpbprPuIOOZX30U=
 github.com/andygrunwald/go-gerrit v0.0.0-20190120104749-174420ebee6c/go.mod h1:0iuRQp6WJ44ts+iihy5E/WlPqfg5RNeQxOmzRkxCdtk=
 github.com/anmitsu/go-shlex v0.0.0-20161002113705-648efa622239/go.mod h1:2FmKhYUyUczH0OGQWaF5ceTx0UBShxjsH6f8oGKYe2c=
-github.com/antihax/optional v0.0.0-20180407024304-ca021399b1a6/go.mod h1:V8iCPQYkqmusNa815XgQio277wI47sdRh1dUOLdyC6Q=
+github.com/antihax/optional v1.0.0/go.mod h1:uupD/76wgC+ih3iEmQUL+0Ugr19nfwCT1kdvxnR2qWY=
 github.com/apache/thrift v0.12.0/go.mod h1:cp2SuWMxlEZw2r+iP2GNCdIi4C1qmUzdZFSVb+bacwQ=
 github.com/apex/log v1.1.4/go.mod h1:AlpoD9aScyQfJDVHmLMEcx4oU6LqzkWp4Mg9GdAcEvQ=
 github.com/apex/log v1.3.0/go.mod h1:jd8Vpsr46WAe3EZSQ/IUMs2qQD/GOycT5rPWCO1yGcs=
@@ -604,10 +604,9 @@ github.com/grpc-ecosystem/go-grpc-prometheus v1.2.0/go.mod h1:8NvIoxWQoOIhqOTXgf
 github.com/grpc-ecosystem/grpc-gateway v1.8.5/go.mod h1:vNeuVxBJEsws4ogUvrchl83t/GYV9WGTSLVdBhOQFDY=
 github.com/grpc-ecosystem/grpc-gateway v1.9.0/go.mod h1:vNeuVxBJEsws4ogUvrchl83t/GYV9WGTSLVdBhOQFDY=
 github.com/grpc-ecosystem/grpc-gateway v1.9.2/go.mod h1:vNeuVxBJEsws4ogUvrchl83t/GYV9WGTSLVdBhOQFDY=
-github.com/grpc-ecosystem/grpc-gateway v1.9.4/go.mod h1:vNeuVxBJEsws4ogUvrchl83t/GYV9WGTSLVdBhOQFDY=
 github.com/grpc-ecosystem/grpc-gateway v1.9.5/go.mod h1:vNeuVxBJEsws4ogUvrchl83t/GYV9WGTSLVdBhOQFDY=
-github.com/grpc-ecosystem/grpc-gateway v1.12.1 h1:zCy2xE9ablevUOrUZc3Dl72Dt+ya2FNAvC2yLYMHzi4=
-github.com/grpc-ecosystem/grpc-gateway v1.12.1/go.mod h1:8XEsbTttt/W+VvjtQhLACqCisSPWTxCZ7sBRjU6iH9c=
+github.com/grpc-ecosystem/grpc-gateway v1.14.6 h1:8ERzHx8aj1Sc47mu9n/AksaKCSWrMchFtkdrS4BIj5o=
+github.com/grpc-ecosystem/grpc-gateway v1.14.6/go.mod h1:zdiPV4Yse/1gnckTHtghG4GkDEdKCRJduHpTxT3/jcw=
 github.com/h2non/gock v1.0.9/go.mod h1:CZMcB0Lg5IWnr9bF79pPMg9WeV6WumxQiUJ1UvdO1iE=
 github.com/hashicorp/consul/api v1.1.0/go.mod h1:VmuI/Lkw1nC05EYQWNKwWGbkg+FbDBtguAZLlVdkD9Q=
 github.com/hashicorp/consul/sdk v0.1.1/go.mod h1:VKf9jXwCTEY1QZP2MOLRhb5i/I/ssyNV1vwHyQBF0x8=
@@ -1261,7 +1260,6 @@ golang.org/x/sys v0.0.0-20190616124812-15dcb6c0061f/go.mod h1:h1NjWce9XRLGQEsW7w
 golang.org/x/sys v0.0.0-20190620070143-6f217b454f45/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20190624142023-c5567b49c5d0/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20190626221950-04f50cda93cb/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/sys v0.0.0-20190712062909-fae7ac547cb7/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20190726091711-fc99dfbffb4e/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20190804053845-51ab0e2deafa/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20190826190057-c7b8b68b1456/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
@@ -1461,7 +1459,6 @@ google.golang.org/genproto v0.0.0-20190716160619-c506a9f90610/go.mod h1:DMBHOl98
 google.golang.org/genproto v0.0.0-20190801165951-fa694d86fc64/go.mod h1:DMBHOl98Agz4BDEuKkezgsaosCRResVns1a3J2ZsMNc=
 google.golang.org/genproto v0.0.0-20190819201941-24fa4b261c55/go.mod h1:DMBHOl98Agz4BDEuKkezgsaosCRResVns1a3J2ZsMNc=
 google.golang.org/genproto v0.0.0-20190911173649-1774047e7e51/go.mod h1:IbNlFCBrqXvoKpeg0TB2l7cyZUmoaFKYIwrEpbDKLA8=
-google.golang.org/genproto v0.0.0-20190927181202-20e1ac93f88c/go.mod h1:IbNlFCBrqXvoKpeg0TB2l7cyZUmoaFKYIwrEpbDKLA8=
 google.golang.org/genproto v0.0.0-20191009194640-548a555dbc03/go.mod h1:n3cpQtvxv34hfy77yVDNjmbRyujviMdxYliBSkLhpCc=
 google.golang.org/genproto v0.0.0-20191108220845-16a3f7862a1a/go.mod h1:n3cpQtvxv34hfy77yVDNjmbRyujviMdxYliBSkLhpCc=
 google.golang.org/genproto v0.0.0-20191115194625-c23dd37a84c9/go.mod h1:n3cpQtvxv34hfy77yVDNjmbRyujviMdxYliBSkLhpCc=
@@ -1478,6 +1475,7 @@ google.golang.org/genproto v0.0.0-20200312145019-da6875a35672/go.mod h1:55QSHmfG
 google.golang.org/genproto v0.0.0-20200331122359-1ee6d9798940/go.mod h1:55QSHmfGQM9UVYDPBsyGGes0y52j32PQ3BqQfXhyH3c=
 google.golang.org/genproto v0.0.0-20200430143042-b979b6f78d84/go.mod h1:55QSHmfGQM9UVYDPBsyGGes0y52j32PQ3BqQfXhyH3c=
 google.golang.org/genproto v0.0.0-20200511104702-f5ebc3bea380/go.mod h1:55QSHmfGQM9UVYDPBsyGGes0y52j32PQ3BqQfXhyH3c=
+google.golang.org/genproto v0.0.0-20200513103714-09dca8ec2884/go.mod h1:55QSHmfGQM9UVYDPBsyGGes0y52j32PQ3BqQfXhyH3c=
 google.golang.org/genproto v0.0.0-20200515170657-fc4c6c6a6587/go.mod h1:YsZOwe1myG/8QRHRsmBRE1LrgQY60beZKjly0O1fX9U=
 google.golang.org/genproto v0.0.0-20200526211855-cb27e3aa2013/go.mod h1:NbSheEEYHJ7i3ixzK3sjbqSGDJWnxyFXZblF3eUsNvo=
 google.golang.org/genproto v0.0.0-20200527145253-8367513e4ece/go.mod h1:jDfRM7FcilCzHH/e9qn6dsT145K34l5v+OpcnNgKAAA=
@@ -1497,7 +1495,6 @@ google.golang.org/grpc v1.20.0/go.mod h1:chYK+tFQF0nDUGJgXMSgLCQk3phJEuONr2DCgLD
 google.golang.org/grpc v1.20.1/go.mod h1:10oTOabMzJvdu6/UiuZezV6QK5dSlG84ov/aaiqXj38=
 google.golang.org/grpc v1.21.0/go.mod h1:oYelfM1adQP15Ek0mdvEgi9Df8B9CZIaU1084ijfRaM=
 google.golang.org/grpc v1.21.1/go.mod h1:oYelfM1adQP15Ek0mdvEgi9Df8B9CZIaU1084ijfRaM=
-google.golang.org/grpc v1.22.0/go.mod h1:Y5yQAOtifL1yxbo5wqy6BxZv8vAUGQwXBOALyacEbxg=
 google.golang.org/grpc v1.22.1/go.mod h1:Y5yQAOtifL1yxbo5wqy6BxZv8vAUGQwXBOALyacEbxg=
 google.golang.org/grpc v1.23.0/go.mod h1:Y5yQAOtifL1yxbo5wqy6BxZv8vAUGQwXBOALyacEbxg=
 google.golang.org/grpc v1.23.1/go.mod h1:Y5yQAOtifL1yxbo5wqy6BxZv8vAUGQwXBOALyacEbxg=
diff --git a/metrics/opencensus_exporter.go b/metrics/opencensus_exporter.go
index 22b1c5be2..651d3ce66 100644
--- a/metrics/opencensus_exporter.go
+++ b/metrics/opencensus_exporter.go
@@ -20,6 +20,7 @@ import (
 	"context"
 	"crypto/tls"
 	"fmt"
+	"path"
 
 	"contrib.go.opencensus.io/exporter/ocagent"
 	"go.opencensus.io/resource"
@@ -35,6 +36,10 @@ func newOpenCensusExporter(config *metricsConfig, logger *zap.SugaredLogger) (vi
 	if config.collectorAddress != "" {
 		opts = append(opts, ocagent.WithAddress(config.collectorAddress))
 	}
+	metrixPrefix := path.Join(config.domain, config.component)
+	if metrixPrefix != "" {
+		opts = append(opts, ocagent.WithMetricNamePrefix(metrixPrefix))
+	}
 	if config.requireSecure {
 		opts = append(opts, ocagent.WithTLSCredentials(getCredentials(config.component, config.secret, logger)))
 	} else {
diff --git a/vendor/contrib.go.opencensus.io/exporter/ocagent/go.mod b/vendor/contrib.go.opencensus.io/exporter/ocagent/go.mod
index ffa8ee666..030bbafc0 100644
--- a/vendor/contrib.go.opencensus.io/exporter/ocagent/go.mod
+++ b/vendor/contrib.go.opencensus.io/exporter/ocagent/go.mod
@@ -2,15 +2,15 @@ module contrib.go.opencensus.io/exporter/ocagent
 
 require (
 	github.com/census-instrumentation/opencensus-proto v0.2.1 // this is to match the version used in census-instrumentation/opencensus-service
-	github.com/golang/protobuf v1.3.2
-	github.com/google/go-cmp v0.3.0
-	github.com/grpc-ecosystem/grpc-gateway v1.9.4 // indirect
-	go.opencensus.io v0.22.0
-	golang.org/x/net v0.0.0-20190628185345-da137c7871d7 // indirect
-	golang.org/x/sys v0.0.0-20190712062909-fae7ac547cb7 // indirect
-	google.golang.org/api v0.7.0
-	google.golang.org/genproto v0.0.0-20190716160619-c506a9f90610 // indirect
-	google.golang.org/grpc v1.22.0
+	github.com/golang/protobuf v1.4.2
+	github.com/google/go-cmp v0.4.0
+	github.com/grpc-ecosystem/grpc-gateway v1.14.6 // indirect
+	go.opencensus.io v0.22.3
+	golang.org/x/net v0.0.0-20200520182314-0ba52f642ac2 // indirect
+	golang.org/x/sys v0.0.0-20200523222454-059865788121 // indirect
+	google.golang.org/api v0.25.0
+	google.golang.org/genproto v0.0.0-20200527145253-8367513e4ece // indirect
+	google.golang.org/grpc v1.29.1
 )
 
 go 1.13
diff --git a/vendor/contrib.go.opencensus.io/exporter/ocagent/go.sum b/vendor/contrib.go.opencensus.io/exporter/ocagent/go.sum
index 644d091ca..8fc041cac 100644
--- a/vendor/contrib.go.opencensus.io/exporter/ocagent/go.sum
+++ b/vendor/contrib.go.opencensus.io/exporter/ocagent/go.sum
@@ -1,66 +1,177 @@
 cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
 cloud.google.com/go v0.34.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
 cloud.google.com/go v0.38.0/go.mod h1:990N+gfupTy94rShfmMCWGDn0LpTmnzTp2qbd1dvSRU=
+cloud.google.com/go v0.44.1/go.mod h1:iSa0KzasP4Uvy3f1mN/7PiObzGgflwredwwASm/v6AU=
+cloud.google.com/go v0.44.2/go.mod h1:60680Gw3Yr4ikxnPRS/oxxkBccT6SA1yMk63TGekxKY=
+cloud.google.com/go v0.45.1/go.mod h1:RpBamKRgapWJb87xiFSdk4g1CME7QZg3uwTez+TSTjc=
+cloud.google.com/go v0.46.3/go.mod h1:a6bKKbmY7er1mI7TEI4lsAkts/mkhTSZK8w33B4RAg0=
+cloud.google.com/go v0.50.0/go.mod h1:r9sluTvynVuxRIOHXQEHMFffphuXHOMZMycpNR5e6To=
+cloud.google.com/go v0.52.0/go.mod h1:pXajvRH/6o3+F9jDHZWQ5PbGhn+o8w9qiu/CffaVdO4=
+cloud.google.com/go v0.53.0/go.mod h1:fp/UouUEsRkN6ryDKNW/Upv/JBKnv6WDthjR6+vze6M=
+cloud.google.com/go v0.56.0/go.mod h1:jr7tqZxxKOVYizybht9+26Z/gUq7tiRzu+ACVAMbKVk=
+cloud.google.com/go/bigquery v1.0.1/go.mod h1:i/xbL2UlR5RvWAURpBYZTtm/cXjCha9lbfbpx4poX+o=
+cloud.google.com/go/bigquery v1.3.0/go.mod h1:PjpwJnslEMmckchkHFfq+HTD2DmtT67aNFKH1/VBDHE=
+cloud.google.com/go/bigquery v1.4.0/go.mod h1:S8dzgnTigyfTmLBfrtrhyYhwRxG72rYxvftPBK2Dvzc=
+cloud.google.com/go/datastore v1.0.0/go.mod h1:LXYbyblFSglQ5pkeyhO+Qmw7ukd3C+pD7TKLgZqpHYE=
+cloud.google.com/go/datastore v1.1.0/go.mod h1:umbIZjpQpHh4hmRpGhH4tLFup+FVzqBi1b3c64qFpCk=
+cloud.google.com/go/pubsub v1.0.1/go.mod h1:R0Gpsv3s54REJCy4fxDixWD93lHJMoZTyQ2kNxGRt3I=
+cloud.google.com/go/pubsub v1.1.0/go.mod h1:EwwdRX2sKPjnvnqCa270oGRyludottCI76h+R3AArQw=
+cloud.google.com/go/pubsub v1.2.0/go.mod h1:jhfEVHT8odbXTkndysNHCcx0awwzvfOlguIAii9o8iA=
+cloud.google.com/go/storage v1.0.0/go.mod h1:IhtSnM/ZTZV8YYJWCY8RULGVqBDmpoyjwiyrjsg+URw=
+cloud.google.com/go/storage v1.5.0/go.mod h1:tpKbwo567HUNpVclU5sGELwQWBDZ8gh0ZeosJ0Rtdos=
+cloud.google.com/go/storage v1.6.0/go.mod h1:N7U0C8pVQ/+NIKOBQyamJIeKQKkZ+mxpohlUTyfDhBk=
+dmitri.shuralyov.com/gpu/mtl v0.0.0-20190408044501-666a987793e9/go.mod h1:H6x//7gZCb22OMCxBHrMx7a5I7Hp++hsVxbQ4BYO7hU=
 github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
+github.com/BurntSushi/xgb v0.0.0-20160522181843-27f122750802/go.mod h1:IVnqGOEym/WlBOVXweHU+Q+/VP0lqqI8lqeDx9IjBqo=
+github.com/antihax/optional v1.0.0/go.mod h1:uupD/76wgC+ih3iEmQUL+0Ugr19nfwCT1kdvxnR2qWY=
 github.com/census-instrumentation/opencensus-proto v0.2.1 h1:glEXhBS5PSLLv4IXzLA5yPRVX4bilULVyxxbrfOtDAk=
 github.com/census-instrumentation/opencensus-proto v0.2.1/go.mod h1:f6KPmirojxKA12rnyqOA5BBL4O983OfeGPqjHWSTneU=
+github.com/chzyer/logex v1.1.10/go.mod h1:+Ywpsq7O8HXn0nuIou7OrIPyXbp3wmkHB+jjWRnGsAI=
+github.com/chzyer/readline v0.0.0-20180603132655-2972be24d48e/go.mod h1:nSuG5e5PlCu98SY8svDHJxuZscDgtXS6KTTbou5AhLI=
+github.com/chzyer/test v0.0.0-20180213035817-a1ea475d72b1/go.mod h1:Q3SI9o4m/ZMnBNeIyt5eFwwo7qiLfzFZmjNmxjkiQlU=
 github.com/client9/misspell v0.3.4/go.mod h1:qj6jICC3Q7zFZvVWo7KLAzC3yx5G7kyvSDkc90ppPyw=
+github.com/cncf/udpa/go v0.0.0-20191209042840-269d4d468f6f/go.mod h1:M8M6+tZqaGXZJjfX53e64911xZQV5JYwmTeXPW+k8Sc=
+github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/envoyproxy/go-control-plane v0.9.0/go.mod h1:YTl/9mNaCwkRvm6d1a2C3ymFceY/DCBVvsKhRF0iEA4=
+github.com/envoyproxy/go-control-plane v0.9.1-0.20191026205805-5f8ba28d4473/go.mod h1:YTl/9mNaCwkRvm6d1a2C3ymFceY/DCBVvsKhRF0iEA4=
+github.com/envoyproxy/go-control-plane v0.9.4/go.mod h1:6rpuAdCZL397s3pYoYcLgu1mIlRU8Am5FuJP05cCM98=
+github.com/envoyproxy/protoc-gen-validate v0.1.0/go.mod h1:iSmxcyjqTsJpI2R4NaDN7+kN2VEUnK/pcBlmesArF7c=
 github.com/ghodss/yaml v1.0.0/go.mod h1:4dBDuWmgqj2HViK6kFavaiC9ZROes6MMH2rRYeMEF04=
+github.com/go-gl/glfw v0.0.0-20190409004039-e6da0acd62b1/go.mod h1:vR7hzQXu2zJy9AVAgeJqvqgH9Q5CA+iKCZ2gyEVpxRU=
+github.com/go-gl/glfw/v3.3/glfw v0.0.0-20191125211704-12ad95a8df72/go.mod h1:tQ2UAYgL5IevRw8kRxooKSPJfGvJ9fJQFa0TUsXzTg8=
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 github.com/golang/glog v0.0.0-20160126235308-23def4e6c14b h1:VKtxabqXZkF25pY9ekfRL6a582T4P37/31XEstQ5p58=
 github.com/golang/glog v0.0.0-20160126235308-23def4e6c14b/go.mod h1:SBH7ygxi8pfUlaOkMMuAQtPIUF8ecWP5IEl/CR7VP2Q=
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 github.com/golang/mock v1.1.1/go.mod h1:oTYuIxOrZwtPieC+H1uAHpcLFnEyAGVDL/k47Jfbm0A=
 github.com/golang/mock v1.2.0/go.mod h1:oTYuIxOrZwtPieC+H1uAHpcLFnEyAGVDL/k47Jfbm0A=
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 github.com/golang/protobuf v1.2.0 h1:P3YflyNX/ehuJFLhxviNdFxQPkGK5cDcApsge1SqnvM=
 github.com/golang/protobuf v1.2.0/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
 github.com/golang/protobuf v1.3.1 h1:YF8+flBXS5eO826T4nzqPrxfhQThhXl0YzfuUPu4SBg=
 github.com/golang/protobuf v1.3.1/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
-github.com/golang/protobuf v1.3.2 h1:6nsPYzhq5kReh6QImI3k5qWzO4PEbvbIW2cwSfR/6xs=
 github.com/golang/protobuf v1.3.2/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
+github.com/golang/protobuf v1.3.3/go.mod h1:vzj43D7+SQXF/4pzW/hwtAqwc6iTitCiVSaWz5lYuqw=
+github.com/golang/protobuf v1.3.5/go.mod h1:6O5/vntMXwX2lRkT1hjjk0nAC1IDOTvTlVgjlRvqsdk=
+github.com/golang/protobuf v1.4.0-rc.1/go.mod h1:ceaxUfeHdC40wWswd/P6IGgMaK3YpKi5j83Wpe3EHw8=
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@@ -104,17 +273,56 @@ google.golang.org/genproto v0.0.0-20190418145605-e7d98fc518a7/go.mod h1:VzzqZJRn
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 google.golang.org/grpc v1.19.0/go.mod h1:mqu4LbDTu4XGKhr4mRzUsmM4RtVoemTSY81AxZiDr8c=
 google.golang.org/grpc v1.20.1 h1:Hz2g2wirWK7H0qIIhGIqRGTuMwTE8HEKFnDZZ7lm9NU=
 google.golang.org/grpc v1.20.1/go.mod h1:10oTOabMzJvdu6/UiuZezV6QK5dSlG84ov/aaiqXj38=
-google.golang.org/grpc v1.22.0 h1:J0UbZOIrCAl+fpTOf8YLs4dJo8L/owV4LYVtAXQoPkw=
-google.golang.org/grpc v1.22.0/go.mod h1:Y5yQAOtifL1yxbo5wqy6BxZv8vAUGQwXBOALyacEbxg=
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+google.golang.org/grpc v1.29.1 h1:EC2SB8S04d2r73uptxphDSUG+kTKVgjRPF+N3xpxRB4=
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+google.golang.org/protobuf v1.24.0 h1:UhZDfRO8JRQru4/+LlLE0BRKGF8L+PICnvYZmx/fEGA=
+google.golang.org/protobuf v1.24.0/go.mod h1:r/3tXBNzIEhYS9I1OUVjXDlt8tc493IdKGjtUeSXeh4=
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 honnef.co/go/tools v0.0.0-20190102054323-c2f93a96b099/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
 honnef.co/go/tools v0.0.0-20190106161140-3f1c8253044a/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
 honnef.co/go/tools v0.0.0-20190418001031-e561f6794a2a/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
 honnef.co/go/tools v0.0.0-20190523083050-ea95bdfd59fc/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
+honnef.co/go/tools v0.0.1-2019.2.3/go.mod h1:a3bituU0lyd329TUQxRnasdCoJDkEUEAqEt0JzvZhAg=
+honnef.co/go/tools v0.0.1-2020.1.3/go.mod h1:X/FiERA/W4tHapMX5mGpAtMSVEeEUOyHaw9vFzvIQ3k=
+rsc.io/binaryregexp v0.2.0/go.mod h1:qTv7/COck+e2FymRvadv62gMdZztPaShugOCi3I+8D8=
+rsc.io/quote/v3 v3.1.0/go.mod h1:yEA65RcK8LyAZtP9Kv3t0HmxON59tX3rD+tICJqUlj0=
+rsc.io/sampler v1.3.0/go.mod h1:T1hPZKmBbMNahiBKFy5HrXp6adAjACjK9JXDnKaTXpA=
diff --git a/vendor/contrib.go.opencensus.io/exporter/ocagent/ocagent.go b/vendor/contrib.go.opencensus.io/exporter/ocagent/ocagent.go
index 144e93726..d2e555ab7 100644
--- a/vendor/contrib.go.opencensus.io/exporter/ocagent/ocagent.go
+++ b/vendor/contrib.go.opencensus.io/exporter/ocagent/ocagent.go
@@ -75,6 +75,7 @@ type Exporter struct {
 	compressor         string
 	headers            map[string]string
 	lastConnectErrPtr  unsafe.Pointer
+	metricNamePerfix   string
 
 	startOnce      sync.Once
 	stopCh         chan bool
@@ -513,14 +514,14 @@ func (ae *Exporter) uploadTraces(sdl []*trace.SpanData) {
 	}
 }
 
-func ocViewDataToPbMetrics(vdl []*view.Data) []*metricspb.Metric {
+func ocViewDataToPbMetrics(vdl []*view.Data, metricNamePrefix string) []*metricspb.Metric {
 	if len(vdl) == 0 {
 		return nil
 	}
 	metrics := make([]*metricspb.Metric, 0, len(vdl))
 	for _, vd := range vdl {
 		if vd != nil {
-			vmetric, err := viewDataToMetric(vd)
+			vmetric, err := viewDataToMetric(vd, metricNamePrefix)
 			// TODO: (@odeke-em) somehow report this error, if it is non-nil.
 			if err == nil && vmetric != nil {
 				metrics = append(metrics, vmetric)
@@ -531,7 +532,7 @@ func ocViewDataToPbMetrics(vdl []*view.Data) []*metricspb.Metric {
 }
 
 func (ae *Exporter) uploadViewData(vdl []*view.Data) {
-	protoMetrics := ocViewDataToPbMetrics(vdl)
+	protoMetrics := ocViewDataToPbMetrics(vdl, ae.metricNamePerfix)
 	if len(protoMetrics) == 0 {
 		return
 	}
diff --git a/vendor/contrib.go.opencensus.io/exporter/ocagent/options.go b/vendor/contrib.go.opencensus.io/exporter/ocagent/options.go
index 6820216f3..ab78810e8 100644
--- a/vendor/contrib.go.opencensus.io/exporter/ocagent/options.go
+++ b/vendor/contrib.go.opencensus.io/exporter/ocagent/options.go
@@ -159,3 +159,16 @@ func WithGRPCDialOption(opts ...grpc.DialOption) ExporterOption {
 func (opts grpcDialOptions) withExporter(e *Exporter) {
 	e.grpcDialOptions = opts
 }
+
+type metricNamePrefixSetter string
+
+var _ ExporterOption = (*metricNamePrefixSetter)(nil)
+
+func (p metricNamePrefixSetter) withExporter(e *Exporter) {
+	e.metricNamePerfix = string(p)
+}
+
+// WithMetricNamePrefix provides an option for the caller to add a prefix to metric names.
+func WithMetricNamePrefix(prefix string) ExporterOption {
+	return metricNamePrefixSetter(prefix)
+}
diff --git a/vendor/contrib.go.opencensus.io/exporter/ocagent/transform_stats_to_metrics.go b/vendor/contrib.go.opencensus.io/exporter/ocagent/transform_stats_to_metrics.go
index 43f18dec1..451609125 100644
--- a/vendor/contrib.go.opencensus.io/exporter/ocagent/transform_stats_to_metrics.go
+++ b/vendor/contrib.go.opencensus.io/exporter/ocagent/transform_stats_to_metrics.go
@@ -33,12 +33,12 @@ var (
 	errNilViewData = errors.New("expecting a non-nil view.Data")
 )
 
-func viewDataToMetric(vd *view.Data) (*metricspb.Metric, error) {
+func viewDataToMetric(vd *view.Data, metricNamePrefix string) (*metricspb.Metric, error) {
 	if vd == nil {
 		return nil, errNilViewData
 	}
 
-	descriptor, err := viewToMetricDescriptor(vd.View)
+	descriptor, err := viewToMetricDescriptor(vd.View, metricNamePrefix)
 	if err != nil {
 		return nil, err
 	}
@@ -55,7 +55,7 @@ func viewDataToMetric(vd *view.Data) (*metricspb.Metric, error) {
 	return metric, nil
 }
 
-func viewToMetricDescriptor(v *view.View) (*metricspb.MetricDescriptor, error) {
+func viewToMetricDescriptor(v *view.View, metricNamePrefix string) (*metricspb.MetricDescriptor, error) {
 	if v == nil {
 		return nil, errNilView
 	}
@@ -63,8 +63,12 @@ func viewToMetricDescriptor(v *view.View) (*metricspb.MetricDescriptor, error) {
 		return nil, errNilMeasure
 	}
 
+	name := stringOrCall(v.Name, v.Measure.Name)
+	if len(metricNamePrefix) > 0 {
+		name = metricNamePrefix + "/" + name
+	}
 	desc := &metricspb.MetricDescriptor{
-		Name:        stringOrCall(v.Name, v.Measure.Name),
+		Name:        name,
 		Description: stringOrCall(v.Description, v.Measure.Description),
 		Unit:        v.Measure.Unit(),
 		Type:        aggregationToMetricDescriptorType(v),
diff --git a/vendor/github.com/grpc-ecosystem/grpc-gateway/internal/BUILD.bazel b/vendor/github.com/grpc-ecosystem/grpc-gateway/internal/BUILD.bazel
index 76cafe6ec..5242751fb 100644
--- a/vendor/github.com/grpc-ecosystem/grpc-gateway/internal/BUILD.bazel
+++ b/vendor/github.com/grpc-ecosystem/grpc-gateway/internal/BUILD.bazel
@@ -1,3 +1,4 @@
+load("@rules_proto//proto:defs.bzl", "proto_library")
 load("@io_bazel_rules_go//go:def.bzl", "go_library")
 load("@io_bazel_rules_go//proto:def.bzl", "go_proto_library")
 
@@ -5,7 +6,7 @@ package(default_visibility = ["//visibility:public"])
 
 proto_library(
     name = "internal_proto",
-    srcs = ["stream_chunk.proto"],
+    srcs = ["errors.proto"],
     deps = ["@com_google_protobuf//:any_proto"],
 )
 
diff --git a/vendor/github.com/grpc-ecosystem/grpc-gateway/internal/errors.pb.go b/vendor/github.com/grpc-ecosystem/grpc-gateway/internal/errors.pb.go
new file mode 100644
index 000000000..61101d717
--- /dev/null
+++ b/vendor/github.com/grpc-ecosystem/grpc-gateway/internal/errors.pb.go
@@ -0,0 +1,189 @@
+// Code generated by protoc-gen-go. DO NOT EDIT.
+// source: internal/errors.proto
+
+package internal
+
+import (
+	fmt "fmt"
+	proto "github.com/golang/protobuf/proto"
+	any "github.com/golang/protobuf/ptypes/any"
+	math "math"
+)
+
+// Reference imports to suppress errors if they are not otherwise used.
+var _ = proto.Marshal
+var _ = fmt.Errorf
+var _ = math.Inf
+
+// This is a compile-time assertion to ensure that this generated file
+// is compatible with the proto package it is being compiled against.
+// A compilation error at this line likely means your copy of the
+// proto package needs to be updated.
+const _ = proto.ProtoPackageIsVersion3 // please upgrade the proto package
+
+// Error is the generic error returned from unary RPCs.
+type Error struct {
+	Error string `protobuf:"bytes,1,opt,name=error,proto3" json:"error,omitempty"`
+	// This is to make the error more compatible with users that expect errors to be Status objects:
+	// https://github.com/grpc/grpc/blob/master/src/proto/grpc/status/status.proto
+	// It should be the exact same message as the Error field.
+	Code                 int32      `protobuf:"varint,2,opt,name=code,proto3" json:"code,omitempty"`
+	Message              string     `protobuf:"bytes,3,opt,name=message,proto3" json:"message,omitempty"`
+	Details              []*any.Any `protobuf:"bytes,4,rep,name=details,proto3" json:"details,omitempty"`
+	XXX_NoUnkeyedLiteral struct{}   `json:"-"`
+	XXX_unrecognized     []byte     `json:"-"`
+	XXX_sizecache        int32      `json:"-"`
+}
+
+func (m *Error) Reset()         { *m = Error{} }
+func (m *Error) String() string { return proto.CompactTextString(m) }
+func (*Error) ProtoMessage()    {}
+func (*Error) Descriptor() ([]byte, []int) {
+	return fileDescriptor_9b093362ca6d1e03, []int{0}
+}
+
+func (m *Error) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_Error.Unmarshal(m, b)
+}
+func (m *Error) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_Error.Marshal(b, m, deterministic)
+}
+func (m *Error) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_Error.Merge(m, src)
+}
+func (m *Error) XXX_Size() int {
+	return xxx_messageInfo_Error.Size(m)
+}
+func (m *Error) XXX_DiscardUnknown() {
+	xxx_messageInfo_Error.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_Error proto.InternalMessageInfo
+
+func (m *Error) GetError() string {
+	if m != nil {
+		return m.Error
+	}
+	return ""
+}
+
+func (m *Error) GetCode() int32 {
+	if m != nil {
+		return m.Code
+	}
+	return 0
+}
+
+func (m *Error) GetMessage() string {
+	if m != nil {
+		return m.Message
+	}
+	return ""
+}
+
+func (m *Error) GetDetails() []*any.Any {
+	if m != nil {
+		return m.Details
+	}
+	return nil
+}
+
+// StreamError is a response type which is returned when
+// streaming rpc returns an error.
+type StreamError struct {
+	GrpcCode             int32      `protobuf:"varint,1,opt,name=grpc_code,json=grpcCode,proto3" json:"grpc_code,omitempty"`
+	HttpCode             int32      `protobuf:"varint,2,opt,name=http_code,json=httpCode,proto3" json:"http_code,omitempty"`
+	Message              string     `protobuf:"bytes,3,opt,name=message,proto3" json:"message,omitempty"`
+	HttpStatus           string     `protobuf:"bytes,4,opt,name=http_status,json=httpStatus,proto3" json:"http_status,omitempty"`
+	Details              []*any.Any `protobuf:"bytes,5,rep,name=details,proto3" json:"details,omitempty"`
+	XXX_NoUnkeyedLiteral struct{}   `json:"-"`
+	XXX_unrecognized     []byte     `json:"-"`
+	XXX_sizecache        int32      `json:"-"`
+}
+
+func (m *StreamError) Reset()         { *m = StreamError{} }
+func (m *StreamError) String() string { return proto.CompactTextString(m) }
+func (*StreamError) ProtoMessage()    {}
+func (*StreamError) Descriptor() ([]byte, []int) {
+	return fileDescriptor_9b093362ca6d1e03, []int{1}
+}
+
+func (m *StreamError) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_StreamError.Unmarshal(m, b)
+}
+func (m *StreamError) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_StreamError.Marshal(b, m, deterministic)
+}
+func (m *StreamError) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_StreamError.Merge(m, src)
+}
+func (m *StreamError) XXX_Size() int {
+	return xxx_messageInfo_StreamError.Size(m)
+}
+func (m *StreamError) XXX_DiscardUnknown() {
+	xxx_messageInfo_StreamError.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_StreamError proto.InternalMessageInfo
+
+func (m *StreamError) GetGrpcCode() int32 {
+	if m != nil {
+		return m.GrpcCode
+	}
+	return 0
+}
+
+func (m *StreamError) GetHttpCode() int32 {
+	if m != nil {
+		return m.HttpCode
+	}
+	return 0
+}
+
+func (m *StreamError) GetMessage() string {
+	if m != nil {
+		return m.Message
+	}
+	return ""
+}
+
+func (m *StreamError) GetHttpStatus() string {
+	if m != nil {
+		return m.HttpStatus
+	}
+	return ""
+}
+
+func (m *StreamError) GetDetails() []*any.Any {
+	if m != nil {
+		return m.Details
+	}
+	return nil
+}
+
+func init() {
+	proto.RegisterType((*Error)(nil), "grpc.gateway.runtime.Error")
+	proto.RegisterType((*StreamError)(nil), "grpc.gateway.runtime.StreamError")
+}
+
+func init() { proto.RegisterFile("internal/errors.proto", fileDescriptor_9b093362ca6d1e03) }
+
+var fileDescriptor_9b093362ca6d1e03 = []byte{
+	// 252 bytes of a gzipped FileDescriptorProto
+	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0x8c, 0x90, 0xc1, 0x4a, 0xc4, 0x30,
+	0x10, 0x86, 0x89, 0xbb, 0x75, 0xdb, 0xe9, 0x2d, 0x54, 0x88, 0xee, 0xc1, 0xb2, 0xa7, 0x9e, 0x52,
+	0xd0, 0x27, 0xd0, 0xc5, 0x17, 0xe8, 0xde, 0xbc, 0x2c, 0xd9, 0xdd, 0x31, 0x16, 0xda, 0xa4, 0x24,
+	0x53, 0xa4, 0xf8, 0x56, 0x3e, 0xa1, 0x24, 0xa5, 0xb0, 0x27, 0xf1, 0xd6, 0xf9, 0xfb, 0xcf, 0x7c,
+	0x1f, 0x81, 0xbb, 0xd6, 0x10, 0x3a, 0xa3, 0xba, 0x1a, 0x9d, 0xb3, 0xce, 0xcb, 0xc1, 0x59, 0xb2,
+	0xbc, 0xd0, 0x6e, 0x38, 0x4b, 0xad, 0x08, 0xbf, 0xd4, 0x24, 0xdd, 0x68, 0xa8, 0xed, 0xf1, 0xe1,
+	0x5e, 0x5b, 0xab, 0x3b, 0xac, 0x63, 0xe7, 0x34, 0x7e, 0xd4, 0xca, 0x4c, 0xf3, 0xc2, 0xee, 0x1b,
+	0x92, 0xb7, 0x70, 0x80, 0x17, 0x90, 0xc4, 0x4b, 0x82, 0x95, 0xac, 0xca, 0x9a, 0x79, 0xe0, 0x1c,
+	0xd6, 0x67, 0x7b, 0x41, 0x71, 0x53, 0xb2, 0x2a, 0x69, 0xe2, 0x37, 0x17, 0xb0, 0xe9, 0xd1, 0x7b,
+	0xa5, 0x51, 0xac, 0x62, 0x77, 0x19, 0xb9, 0x84, 0xcd, 0x05, 0x49, 0xb5, 0x9d, 0x17, 0xeb, 0x72,
+	0x55, 0xe5, 0x4f, 0x85, 0x9c, 0xc9, 0x72, 0x21, 0xcb, 0x17, 0x33, 0x35, 0x4b, 0x69, 0xf7, 0xc3,
+	0x20, 0x3f, 0x90, 0x43, 0xd5, 0xcf, 0x0e, 0x5b, 0xc8, 0x82, 0xff, 0x31, 0x22, 0x59, 0x44, 0xa6,
+	0x21, 0xd8, 0x07, 0xec, 0x16, 0xb2, 0x4f, 0xa2, 0xe1, 0x78, 0xe5, 0x93, 0x86, 0x60, 0xff, 0xb7,
+	0xd3, 0x23, 0xe4, 0x71, 0xcd, 0x93, 0xa2, 0x31, 0x78, 0x85, 0xbf, 0x10, 0xa2, 0x43, 0x4c, 0xae,
+	0xa5, 0x93, 0x7f, 0x48, 0xbf, 0xc2, 0x7b, 0xba, 0xbc, 0xfd, 0xe9, 0x36, 0x56, 0x9e, 0x7f, 0x03,
+	0x00, 0x00, 0xff, 0xff, 0xde, 0x72, 0x6b, 0x83, 0x8e, 0x01, 0x00, 0x00,
+}
diff --git a/vendor/github.com/grpc-ecosystem/grpc-gateway/internal/errors.proto b/vendor/github.com/grpc-ecosystem/grpc-gateway/internal/errors.proto
new file mode 100644
index 000000000..4fb212c6b
--- /dev/null
+++ b/vendor/github.com/grpc-ecosystem/grpc-gateway/internal/errors.proto
@@ -0,0 +1,26 @@
+syntax = "proto3";
+package grpc.gateway.runtime;
+option go_package = "internal";
+
+import "google/protobuf/any.proto";
+
+// Error is the generic error returned from unary RPCs.
+message Error {
+	string error = 1;
+	// This is to make the error more compatible with users that expect errors to be Status objects:
+	// https://github.com/grpc/grpc/blob/master/src/proto/grpc/status/status.proto
+	// It should be the exact same message as the Error field.
+	int32 code = 2;
+	string message = 3;
+	repeated google.protobuf.Any details = 4;
+}
+
+// StreamError is a response type which is returned when
+// streaming rpc returns an error.
+message StreamError {
+	int32 grpc_code = 1;
+	int32 http_code = 2;
+	string message = 3;
+	string http_status = 4;
+	repeated google.protobuf.Any details = 5;
+}
diff --git a/vendor/github.com/grpc-ecosystem/grpc-gateway/internal/stream_chunk.pb.go b/vendor/github.com/grpc-ecosystem/grpc-gateway/internal/stream_chunk.pb.go
deleted file mode 100644
index 1eca68e33..000000000
--- a/vendor/github.com/grpc-ecosystem/grpc-gateway/internal/stream_chunk.pb.go
+++ /dev/null
@@ -1,119 +0,0 @@
-// Code generated by protoc-gen-go. DO NOT EDIT.
-// source: internal/stream_chunk.proto
-
-package internal
-
-import (
-	fmt "fmt"
-	proto "github.com/golang/protobuf/proto"
-	any "github.com/golang/protobuf/ptypes/any"
-	math "math"
-)
-
-// Reference imports to suppress errors if they are not otherwise used.
-var _ = proto.Marshal
-var _ = fmt.Errorf
-var _ = math.Inf
-
-// This is a compile-time assertion to ensure that this generated file
-// is compatible with the proto package it is being compiled against.
-// A compilation error at this line likely means your copy of the
-// proto package needs to be updated.
-const _ = proto.ProtoPackageIsVersion3 // please upgrade the proto package
-
-// StreamError is a response type which is returned when
-// streaming rpc returns an error.
-type StreamError struct {
-	GrpcCode             int32      `protobuf:"varint,1,opt,name=grpc_code,json=grpcCode,proto3" json:"grpc_code,omitempty"`
-	HttpCode             int32      `protobuf:"varint,2,opt,name=http_code,json=httpCode,proto3" json:"http_code,omitempty"`
-	Message              string     `protobuf:"bytes,3,opt,name=message,proto3" json:"message,omitempty"`
-	HttpStatus           string     `protobuf:"bytes,4,opt,name=http_status,json=httpStatus,proto3" json:"http_status,omitempty"`
-	Details              []*any.Any `protobuf:"bytes,5,rep,name=details,proto3" json:"details,omitempty"`
-	XXX_NoUnkeyedLiteral struct{}   `json:"-"`
-	XXX_unrecognized     []byte     `json:"-"`
-	XXX_sizecache        int32      `json:"-"`
-}
-
-func (m *StreamError) Reset()         { *m = StreamError{} }
-func (m *StreamError) String() string { return proto.CompactTextString(m) }
-func (*StreamError) ProtoMessage()    {}
-func (*StreamError) Descriptor() ([]byte, []int) {
-	return fileDescriptor_9d15b670e96bbb5a, []int{0}
-}
-
-func (m *StreamError) XXX_Unmarshal(b []byte) error {
-	return xxx_messageInfo_StreamError.Unmarshal(m, b)
-}
-func (m *StreamError) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
-	return xxx_messageInfo_StreamError.Marshal(b, m, deterministic)
-}
-func (m *StreamError) XXX_Merge(src proto.Message) {
-	xxx_messageInfo_StreamError.Merge(m, src)
-}
-func (m *StreamError) XXX_Size() int {
-	return xxx_messageInfo_StreamError.Size(m)
-}
-func (m *StreamError) XXX_DiscardUnknown() {
-	xxx_messageInfo_StreamError.DiscardUnknown(m)
-}
-
-var xxx_messageInfo_StreamError proto.InternalMessageInfo
-
-func (m *StreamError) GetGrpcCode() int32 {
-	if m != nil {
-		return m.GrpcCode
-	}
-	return 0
-}
-
-func (m *StreamError) GetHttpCode() int32 {
-	if m != nil {
-		return m.HttpCode
-	}
-	return 0
-}
-
-func (m *StreamError) GetMessage() string {
-	if m != nil {
-		return m.Message
-	}
-	return ""
-}
-
-func (m *StreamError) GetHttpStatus() string {
-	if m != nil {
-		return m.HttpStatus
-	}
-	return ""
-}
-
-func (m *StreamError) GetDetails() []*any.Any {
-	if m != nil {
-		return m.Details
-	}
-	return nil
-}
-
-func init() {
-	proto.RegisterType((*StreamError)(nil), "grpc.gateway.runtime.StreamError")
-}
-
-func init() { proto.RegisterFile("internal/stream_chunk.proto", fileDescriptor_9d15b670e96bbb5a) }
-
-var fileDescriptor_9d15b670e96bbb5a = []byte{
-	// 223 bytes of a gzipped FileDescriptorProto
-	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0x34, 0x90, 0x41, 0x4e, 0xc3, 0x30,
-	0x10, 0x45, 0x15, 0x4a, 0x69, 0x3b, 0xd9, 0x45, 0x5d, 0x18, 0xba, 0x20, 0x62, 0x95, 0x95, 0x23,
-	0xc1, 0x09, 0x00, 0x71, 0x81, 0x74, 0xc7, 0xa6, 0x9a, 0x26, 0x83, 0x13, 0x91, 0xd8, 0xd1, 0x78,
-	0x22, 0x94, 0x6b, 0x71, 0xc2, 0xca, 0x8e, 0xb2, 0xf4, 0x7b, 0x7f, 0xbe, 0xbe, 0x0c, 0xa7, 0xce,
-	0x0a, 0xb1, 0xc5, 0xbe, 0xf4, 0xc2, 0x84, 0xc3, 0xa5, 0x6e, 0x27, 0xfb, 0xab, 0x47, 0x76, 0xe2,
-	0xb2, 0xa3, 0xe1, 0xb1, 0xd6, 0x06, 0x85, 0xfe, 0x70, 0xd6, 0x3c, 0x59, 0xe9, 0x06, 0x7a, 0x7a,
-	0x34, 0xce, 0x99, 0x9e, 0xca, 0x98, 0xb9, 0x4e, 0x3f, 0x25, 0xda, 0x79, 0x39, 0x78, 0xf9, 0x4f,
-	0x20, 0x3d, 0xc7, 0x9e, 0x2f, 0x66, 0xc7, 0xd9, 0x09, 0x0e, 0xa1, 0xe2, 0x52, 0xbb, 0x86, 0x54,
-	0x92, 0x27, 0xc5, 0xb6, 0xda, 0x07, 0xf0, 0xe9, 0x1a, 0x0a, 0xb2, 0x15, 0x19, 0x17, 0x79, 0xb7,
-	0xc8, 0x00, 0xa2, 0x54, 0xb0, 0x1b, 0xc8, 0x7b, 0x34, 0xa4, 0x36, 0x79, 0x52, 0x1c, 0xaa, 0xf5,
-	0x99, 0x3d, 0x43, 0x1a, 0xcf, 0xbc, 0xa0, 0x4c, 0x5e, 0xdd, 0x47, 0x0b, 0x01, 0x9d, 0x23, 0xc9,
-	0x34, 0xec, 0x1a, 0x12, 0xec, 0x7a, 0xaf, 0xb6, 0xf9, 0xa6, 0x48, 0x5f, 0x8f, 0x7a, 0x59, 0xac,
-	0xd7, 0xc5, 0xfa, 0xdd, 0xce, 0xd5, 0x1a, 0xfa, 0x80, 0xef, 0xfd, 0xfa, 0x09, 0xd7, 0x87, 0x18,
-	0x79, 0xbb, 0x05, 0x00, 0x00, 0xff, 0xff, 0x0d, 0x7d, 0xa5, 0x18, 0x17, 0x01, 0x00, 0x00,
-}
diff --git a/vendor/github.com/grpc-ecosystem/grpc-gateway/internal/stream_chunk.proto b/vendor/github.com/grpc-ecosystem/grpc-gateway/internal/stream_chunk.proto
deleted file mode 100644
index 55f42ce63..000000000
--- a/vendor/github.com/grpc-ecosystem/grpc-gateway/internal/stream_chunk.proto
+++ /dev/null
@@ -1,15 +0,0 @@
-syntax = "proto3";
-package grpc.gateway.runtime;
-option go_package = "internal";
-
-import "google/protobuf/any.proto";
-
-// StreamError is a response type which is returned when
-// streaming rpc returns an error.
-message StreamError {
-	int32 grpc_code = 1;
-	int32 http_code = 2;
-	string message = 3;
-	string http_status = 4;
-	repeated google.protobuf.Any details = 5;
-}
diff --git a/vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/BUILD.bazel b/vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/BUILD.bazel
index 819c45a76..58b72b9cf 100644
--- a/vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/BUILD.bazel
+++ b/vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/BUILD.bazel
@@ -64,8 +64,8 @@ go_test(
     ],
     embed = [":go_default_library"],
     deps = [
-        "//examples/proto/examplepb:go_default_library",
         "//internal:go_default_library",
+        "//runtime/internal/examplepb:go_default_library",
         "//utilities:go_default_library",
         "@com_github_golang_protobuf//jsonpb:go_default_library_gen",
         "@com_github_golang_protobuf//proto:go_default_library",
@@ -78,7 +78,6 @@ go_test(
         "@io_bazel_rules_go//proto/wkt:struct_go_proto",
         "@io_bazel_rules_go//proto/wkt:timestamp_go_proto",
         "@io_bazel_rules_go//proto/wkt:wrappers_go_proto",
-        "@org_golang_google_grpc//:go_default_library",
         "@org_golang_google_grpc//codes:go_default_library",
         "@org_golang_google_grpc//metadata:go_default_library",
         "@org_golang_google_grpc//status:go_default_library",
diff --git a/vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/context.go b/vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/context.go
index f8083821f..07673f3e7 100644
--- a/vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/context.go
+++ b/vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/context.go
@@ -201,7 +201,7 @@ func timeoutUnitToDuration(u uint8) (d time.Duration, ok bool) {
 }
 
 // isPermanentHTTPHeader checks whether hdr belongs to the list of
-// permenant request headers maintained by IANA.
+// permanent request headers maintained by IANA.
 // http://www.iana.org/assignments/message-headers/message-headers.xml
 func isPermanentHTTPHeader(hdr string) bool {
 	switch hdr {
diff --git a/vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/errors.go b/vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/errors.go
index a36080713..3feba6134 100644
--- a/vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/errors.go
+++ b/vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/errors.go
@@ -5,8 +5,7 @@ import (
 	"io"
 	"net/http"
 
-	"github.com/golang/protobuf/proto"
-	"github.com/golang/protobuf/ptypes/any"
+	"github.com/grpc-ecosystem/grpc-gateway/internal"
 	"google.golang.org/grpc/codes"
 	"google.golang.org/grpc/grpclog"
 	"google.golang.org/grpc/status"
@@ -58,28 +57,52 @@ func HTTPStatusFromCode(code codes.Code) int {
 }
 
 var (
-	// HTTPError replies to the request with the error.
+	// HTTPError replies to the request with an error.
+	//
+	// HTTPError is called:
+	//  - From generated per-endpoint gateway handler code, when calling the backend results in an error.
+	//  - From gateway runtime code, when forwarding the response message results in an error.
+	//
+	// The default value for HTTPError calls the custom error handler configured on the ServeMux via the
+	// WithProtoErrorHandler serve option if that option was used, calling GlobalHTTPErrorHandler otherwise.
+	//
+	// To customize the error handling of a particular ServeMux instance, use the WithProtoErrorHandler
+	// serve option.
+	//
+	// To customize the error format for all ServeMux instances not using the WithProtoErrorHandler serve
+	// option, set GlobalHTTPErrorHandler to a custom function.
+	//
+	// Setting this variable directly to customize error format is deprecated.
+	HTTPError = MuxOrGlobalHTTPError
+
+	// GlobalHTTPErrorHandler is the HTTPError handler for all ServeMux instances not using the
+	// WithProtoErrorHandler serve option.
+	//
 	// You can set a custom function to this variable to customize error format.
-	HTTPError = DefaultHTTPError
-	// OtherErrorHandler handles the following error used by the gateway: StatusMethodNotAllowed StatusNotFound and StatusBadRequest
+	GlobalHTTPErrorHandler = DefaultHTTPError
+
+	// OtherErrorHandler handles gateway errors from parsing and routing client requests for all
+	// ServeMux instances not using the WithProtoErrorHandler serve option.
+	//
+	// It returns the following error codes: StatusMethodNotAllowed StatusNotFound StatusBadRequest
+	//
+	// To customize parsing and routing error handling of a particular ServeMux instance, use the
+	// WithProtoErrorHandler serve option.
+	//
+	// To customize parsing and routing error handling of all ServeMux instances not using the
+	// WithProtoErrorHandler serve option, set a custom function to this variable.
 	OtherErrorHandler = DefaultOtherErrorHandler
 )
 
-type errorBody struct {
-	Error string `protobuf:"bytes,100,name=error" json:"error"`
-	// This is to make the error more compatible with users that expect errors to be Status objects:
-	// https://github.com/grpc/grpc/blob/master/src/proto/grpc/status/status.proto
-	// It should be the exact same message as the Error field.
-	Code    int32      `protobuf:"varint,1,name=code" json:"code"`
-	Message string     `protobuf:"bytes,2,name=message" json:"message"`
-	Details []*any.Any `protobuf:"bytes,3,rep,name=details" json:"details,omitempty"`
+// MuxOrGlobalHTTPError uses the mux-configured error handler, falling back to GlobalErrorHandler.
+func MuxOrGlobalHTTPError(ctx context.Context, mux *ServeMux, marshaler Marshaler, w http.ResponseWriter, r *http.Request, err error) {
+	if mux.protoErrorHandler != nil {
+		mux.protoErrorHandler(ctx, mux, marshaler, w, r, err)
+	} else {
+		GlobalHTTPErrorHandler(ctx, mux, marshaler, w, r, err)
+	}
 }
 
-// Make this also conform to proto.Message for builtin JSONPb Marshaler
-func (e *errorBody) Reset()         { *e = errorBody{} }
-func (e *errorBody) String() string { return proto.CompactTextString(e) }
-func (*errorBody) ProtoMessage()    {}
-
 // DefaultHTTPError is the default implementation of HTTPError.
 // If "err" is an error from gRPC system, the function replies with the status code mapped by HTTPStatusFromCode.
 // If otherwise, it replies with http.StatusInternalServerError.
@@ -97,16 +120,16 @@ func DefaultHTTPError(ctx context.Context, mux *ServeMux, marshaler Marshaler, w
 	w.Header().Del("Trailer")
 
 	contentType := marshaler.ContentType()
-	// Check marshaler on run time in order to keep backwards compatability
+	// Check marshaler on run time in order to keep backwards compatibility
 	// An interface param needs to be added to the ContentType() function on
 	// the Marshal interface to be able to remove this check
-	if httpBodyMarshaler, ok := marshaler.(*HTTPBodyMarshaler); ok {
+	if typeMarshaler, ok := marshaler.(contentTypeMarshaler); ok {
 		pb := s.Proto()
-		contentType = httpBodyMarshaler.ContentTypeFromMessage(pb)
+		contentType = typeMarshaler.ContentTypeFromMessage(pb)
 	}
 	w.Header().Set("Content-Type", contentType)
 
-	body := &errorBody{
+	body := &internal.Error{
 		Error:   s.Message(),
 		Message: s.Message(),
 		Code:    int32(s.Code()),
diff --git a/vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/handler.go b/vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/handler.go
index 2af900650..e6e8f286e 100644
--- a/vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/handler.go
+++ b/vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/handler.go
@@ -1,13 +1,13 @@
 package runtime
 
 import (
+	"context"
 	"errors"
 	"fmt"
 	"io"
 	"net/http"
 	"net/textproto"
 
-	"context"
 	"github.com/golang/protobuf/proto"
 	"github.com/grpc-ecosystem/grpc-gateway/internal"
 	"google.golang.org/grpc/grpclog"
@@ -61,7 +61,19 @@ func ForwardResponseStream(ctx context.Context, mux *ServeMux, marshaler Marshal
 			return
 		}
 
-		buf, err := marshaler.Marshal(streamChunk(ctx, resp, mux.streamErrorHandler))
+		var buf []byte
+		switch {
+		case resp == nil:
+			buf, err = marshaler.Marshal(errorChunk(streamError(ctx, mux.streamErrorHandler, errEmptyResponse)))
+		default:
+			result := map[string]interface{}{"result": resp}
+			if rb, ok := resp.(responseBody); ok {
+				result["result"] = rb.XXX_ResponseBody()
+			}
+
+			buf, err = marshaler.Marshal(result)
+		}
+
 		if err != nil {
 			grpclog.Infof("Failed to marshal response chunk: %v", err)
 			handleForwardResponseStreamError(ctx, wroteHeader, marshaler, w, req, mux, err)
@@ -123,11 +135,11 @@ func ForwardResponseMessage(ctx context.Context, mux *ServeMux, marshaler Marsha
 	handleForwardResponseTrailerHeader(w, md)
 
 	contentType := marshaler.ContentType()
-	// Check marshaler on run time in order to keep backwards compatability
+	// Check marshaler on run time in order to keep backwards compatibility
 	// An interface param needs to be added to the ContentType() function on
 	// the Marshal interface to be able to remove this check
-	if httpBodyMarshaler, ok := marshaler.(*HTTPBodyMarshaler); ok {
-		contentType = httpBodyMarshaler.ContentTypeFromMessage(resp)
+	if typeMarshaler, ok := marshaler.(contentTypeMarshaler); ok {
+		contentType = typeMarshaler.ContentTypeFromMessage(resp)
 	}
 	w.Header().Set("Content-Type", contentType)
 
@@ -184,15 +196,6 @@ func handleForwardResponseStreamError(ctx context.Context, wroteHeader bool, mar
 	}
 }
 
-// streamChunk returns a chunk in a response stream for the given result. The
-// given errHandler is used to render an error chunk if result is nil.
-func streamChunk(ctx context.Context, result proto.Message, errHandler StreamErrorHandlerFunc) map[string]proto.Message {
-	if result == nil {
-		return errorChunk(streamError(ctx, errHandler, errEmptyResponse))
-	}
-	return map[string]proto.Message{"result": result}
-}
-
 // streamError returns the payload for the final message in a response stream
 // that represents the given err.
 func streamError(ctx context.Context, errHandler StreamErrorHandlerFunc, err error) *StreamError {
diff --git a/vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/marshal_httpbodyproto.go b/vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/marshal_httpbodyproto.go
index f55285b5d..525b0338c 100644
--- a/vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/marshal_httpbodyproto.go
+++ b/vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/marshal_httpbodyproto.go
@@ -19,7 +19,7 @@ type HTTPBodyMarshaler struct {
 	Marshaler
 }
 
-// ContentType implementation to keep backwards compatability with marshal interface
+// ContentType implementation to keep backwards compatibility with marshal interface
 func (h *HTTPBodyMarshaler) ContentType() string {
 	return h.ContentTypeFromMessage(nil)
 }
diff --git a/vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/marshaler.go b/vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/marshaler.go
index 98fe6e88a..461532942 100644
--- a/vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/marshaler.go
+++ b/vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/marshaler.go
@@ -19,6 +19,13 @@ type Marshaler interface {
 	ContentType() string
 }
 
+// Marshalers that implement contentTypeMarshaler will have their ContentTypeFromMessage method called
+// to set the Content-Type header on the response
+type contentTypeMarshaler interface {
+	// ContentTypeFromMessage returns the Content-Type this marshaler produces from the provided message
+	ContentTypeFromMessage(v interface{}) string
+}
+
 // Decoder decodes a byte sequence
 type Decoder interface {
 	Decode(v interface{}) error
@@ -43,6 +50,6 @@ func (f EncoderFunc) Encode(v interface{}) error { return f(v) }
 
 // Delimited defines the streaming delimiter.
 type Delimited interface {
-	// Delimiter returns the record seperator for the stream.
+	// Delimiter returns the record separator for the stream.
 	Delimiter() []byte
 }
diff --git a/vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/mux.go b/vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/mux.go
index 1da3a5885..523a9cb43 100644
--- a/vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/mux.go
+++ b/vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/mux.go
@@ -55,6 +55,15 @@ func WithForwardResponseOption(forwardResponseOption func(context.Context, http.
 	}
 }
 
+// SetQueryParameterParser sets the query parameter parser, used to populate message from query parameters.
+// Configuring this will mean the generated swagger output is no longer correct, and it should be
+// done with careful consideration.
+func SetQueryParameterParser(queryParameterParser QueryParameterParser) ServeMuxOption {
+	return func(serveMux *ServeMux) {
+		currentQueryParser = queryParameterParser
+	}
+}
+
 // HeaderMatcherFunc checks whether a header key should be forwarded to/from gRPC context.
 type HeaderMatcherFunc func(string) (string, bool)
 
@@ -102,11 +111,11 @@ func WithMetadata(annotator func(context.Context, *http.Request) metadata.MD) Se
 	}
 }
 
-// WithProtoErrorHandler returns a ServeMuxOption for passing metadata to a gRPC context.
+// WithProtoErrorHandler returns a ServeMuxOption for configuring a custom error handler.
 //
 // This can be used to handle an error as general proto message defined by gRPC.
-// The response including body and status is not backward compatible with the default error handler.
-// When this option is used, HTTPError and OtherErrorHandler are overwritten on initialization.
+// When this option is used, the mux uses the configured error handler instead of HTTPError and
+// OtherErrorHandler.
 func WithProtoErrorHandler(fn ProtoErrorHandlerFunc) ServeMuxOption {
 	return func(serveMux *ServeMux) {
 		serveMux.protoErrorHandler = fn
@@ -156,18 +165,6 @@ func NewServeMux(opts ...ServeMuxOption) *ServeMux {
 		opt(serveMux)
 	}
 
-	if serveMux.protoErrorHandler != nil {
-		HTTPError = serveMux.protoErrorHandler
-		// OtherErrorHandler is no longer used when protoErrorHandler is set.
-		// Overwritten by a special error handler to return Unknown.
-		OtherErrorHandler = func(w http.ResponseWriter, r *http.Request, _ string, _ int) {
-			ctx := context.Background()
-			_, outboundMarshaler := MarshalerForRequest(serveMux, r)
-			sterr := status.Error(codes.Unknown, "unexpected use of OtherErrorHandler")
-			serveMux.protoErrorHandler(ctx, serveMux, outboundMarshaler, w, r, sterr)
-		}
-	}
-
 	if serveMux.incomingHeaderMatcher == nil {
 		serveMux.incomingHeaderMatcher = DefaultHeaderMatcher
 	}
diff --git a/vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/proto_errors.go b/vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/proto_errors.go
index ca76324ef..3fd30da22 100644
--- a/vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/proto_errors.go
+++ b/vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/proto_errors.go
@@ -44,12 +44,12 @@ func DefaultHTTPProtoErrorHandler(ctx context.Context, mux *ServeMux, marshaler
 	w.Header().Del("Trailer")
 
 	contentType := marshaler.ContentType()
-	// Check marshaler on run time in order to keep backwards compatability
+	// Check marshaler on run time in order to keep backwards compatibility
 	// An interface param needs to be added to the ContentType() function on
 	// the Marshal interface to be able to remove this check
-	if httpBodyMarshaler, ok := marshaler.(*HTTPBodyMarshaler); ok {
+	if typeMarshaler, ok := marshaler.(contentTypeMarshaler); ok {
 		pb := s.Proto()
-		contentType = httpBodyMarshaler.ContentTypeFromMessage(pb)
+		contentType = typeMarshaler.ContentTypeFromMessage(pb)
 	}
 	w.Header().Set("Content-Type", contentType)
 
diff --git a/vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/query.go b/vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/query.go
index ee0207e46..ba66842c3 100644
--- a/vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/query.go
+++ b/vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/query.go
@@ -17,9 +17,24 @@ import (
 
 var valuesKeyRegexp = regexp.MustCompile("^(.*)\\[(.*)\\]$")
 
-// PopulateQueryParameters populates "values" into "msg".
-// A value is ignored if its key starts with one of the elements in "filter".
+var currentQueryParser QueryParameterParser = &defaultQueryParser{}
+
+// QueryParameterParser defines interface for all query parameter parsers
+type QueryParameterParser interface {
+	Parse(msg proto.Message, values url.Values, filter *utilities.DoubleArray) error
+}
+
+// PopulateQueryParameters parses query parameters
+// into "msg" using current query parser
 func PopulateQueryParameters(msg proto.Message, values url.Values, filter *utilities.DoubleArray) error {
+	return currentQueryParser.Parse(msg, values, filter)
+}
+
+type defaultQueryParser struct{}
+
+// Parse populates "values" into "msg".
+// A value is ignored if its key starts with one of the elements in "filter".
+func (*defaultQueryParser) Parse(msg proto.Message, values url.Values, filter *utilities.DoubleArray) error {
 	for key, values := range values {
 		match := valuesKeyRegexp.FindStringSubmatch(key)
 		if len(match) == 3 {
@@ -117,14 +132,16 @@ func fieldByProtoName(m reflect.Value, name string) (reflect.Value, *proto.Prope
 	props := proto.GetProperties(m.Type())
 
 	// look up field name in oneof map
-	if op, ok := props.OneofTypes[name]; ok {
-		v := reflect.New(op.Type.Elem())
-		field := m.Field(op.Field)
-		if !field.IsNil() {
-			return reflect.Value{}, nil, fmt.Errorf("field already set for %s oneof", props.Prop[op.Field].OrigName)
+	for _, op := range props.OneofTypes {
+		if name == op.Prop.OrigName || name == op.Prop.JSONName {
+			v := reflect.New(op.Type.Elem())
+			field := m.Field(op.Field)
+			if !field.IsNil() {
+				return reflect.Value{}, nil, fmt.Errorf("field already set for %s oneof", props.Prop[op.Field].OrigName)
+			}
+			field.Set(v)
+			return v.Elem().Field(0), op.Prop, nil
 		}
-		field.Set(v)
-		return v.Elem().Field(0), op.Prop, nil
 	}
 
 	for _, p := range props.Prop {
diff --git a/vendor/modules.txt b/vendor/modules.txt
index 0c61d4a4d..8826ba903 100644
--- a/vendor/modules.txt
+++ b/vendor/modules.txt
@@ -13,7 +13,7 @@ cloud.google.com/go/trace/apiv2
 # cloud.google.com/go/storage v1.10.0
 ## explicit
 cloud.google.com/go/storage
-# contrib.go.opencensus.io/exporter/ocagent v0.6.1-0.20200121232419-b3d61dbd6252
+# contrib.go.opencensus.io/exporter/ocagent v0.7.1-0.20200615190824-f8c219d2d895
 ## explicit
 contrib.go.opencensus.io/exporter/ocagent
 # contrib.go.opencensus.io/exporter/prometheus v0.2.1-0.20200609204449-6bcf6f8577f0
@@ -178,8 +178,7 @@ github.com/googleapis/gnostic/extensions
 # github.com/gorilla/websocket v1.4.2
 ## explicit
 github.com/gorilla/websocket
-# github.com/grpc-ecosystem/grpc-gateway v1.12.1
-## explicit
+# github.com/grpc-ecosystem/grpc-gateway v1.14.6
 github.com/grpc-ecosystem/grpc-gateway/internal
 github.com/grpc-ecosystem/grpc-gateway/runtime
 github.com/grpc-ecosystem/grpc-gateway/utilities


Test patch:
diff --git a/metrics/resource_view_test.go b/metrics/resource_view_test.go
index 7896bf785..4c65020b3 100644
--- a/metrics/resource_view_test.go
+++ b/metrics/resource_view_test.go
@@ -231,10 +231,11 @@ func TestMetricsExport(t *testing.T) {
 			Component:      testComponent,
 			PrometheusPort: prometheusPort,
 			ConfigMap: map[string]string{
-				BackendDestinationKey:            string(backend),
-				collectorAddressKey:              ocFake.address,
-				allowStackdriverCustomMetricsKey: "true",
-				reportingPeriodKey:               "1",
+				BackendDestinationKey:               string(backend),
+				collectorAddressKey:                 ocFake.address,
+				allowStackdriverCustomMetricsKey:    "true",
+				stackdriverCustomMetricSubDomainKey: servingDomain,
+				reportingPeriodKey:                  "1",
 			},
 		}
 	}
@@ -277,10 +278,10 @@ func TestMetricsExport(t *testing.T) {
 	}
 
 	expected := []metricExtract{
-		{"global_export_counts", map[string]string{}, 2},
-		{"resource_global_export_count", map[string]string{}, 2},
-		{"testing/value", map[string]string{"project": "p1", "revision": "r1"}, 0},
-		{"testing/value", map[string]string{"project": "p1", "revision": "r2"}, 1},
+		{"knative.dev/serving/testComponent/global_export_counts", map[string]string{}, 2},
+		{"knative.dev/serving/testComponent/resource_global_export_count", map[string]string{}, 2},
+		{"knative.dev/serving/testComponent/testing/value", map[string]string{"project": "p1", "revision": "r1"}, 0},
+		{"knative.dev/serving/testComponent/testing/value", map[string]string{"project": "p1", "revision": "r2"}, 1},
 	}
 
 	harnesses := []struct {
@@ -371,7 +372,7 @@ testComponent_testing_value{project="p1",revision="r2"} 1
 			records := []metricExtract{}
 			for record := range sdFake.published {
 				for _, ts := range record.TimeSeries {
-					name := ts.Metric.Type[len("custom.googleapis.com/knative.dev/testComponent/"):]
+					name := ts.Metric.Type[len("custom.googleapis.com/"):]
 					records = append(records, metricExtract{
 						Name:   name,
 						Labels: ts.Resource.Labels,