Repository: aquasecurity/kube-bench
Pull request #434 (2019-10-04 21:38:58)

Properly initialize viper library when checking for master components
This PR includes:
* Properly initializes the viper library config when checking for master components.
* Adds some additional test coverage to help guard against future regressions.

Fixes: https://github.com/aquasecurity/kube-bench/issues/339

Signed-off-by: Simarpreet Singh <simar.singh@aquasec.com>

codecov[bot]: # [Codecov](https://codecov.io/gh/aquasecurity/kube-bench/pull/434?src=pr&el=h1) Report
> Merging [#434](https://codecov.io/gh/aquasecurity/kube-bench/pull/434?src=pr&el=desc) into [master](https://codecov.io/gh/aquasecurity/kube-bench/commit/16beb3e616aea52c415273ce5782489eb64fc347?src=pr&el=desc) will **increase** coverage by `1.4%`.
> The diff coverage is `100%`.

[![Impacted file tree graph](https://codecov.io/gh/aquasecurity/kube-bench/pull/434/graphs/tree.svg?width=650&token=MVaDEmdgi9&height=150&src=pr)](https://codecov.io/gh/aquasecurity/kube-bench/pull/434?src=pr&el=tree)

```diff
@@            Coverage Diff            @@
##           master     #434     +/-   ##
=========================================
+ Coverage   52.75%   54.15%   +1.4%     
=========================================
  Files          11       11             
  Lines         817      818      +1     
=========================================
+ Hits          431      443     +12     
+ Misses        374      363     -11     
  Partials       12       12
```


| [Impacted Files](https://codecov.io/gh/aquasecurity/kube-bench/pull/434?src=pr&el=tree) | Coverage Δ | |
|---|---|---|
| [cmd/common.go](https://codecov.io/gh/aquasecurity/kube-bench/pull/434/diff?src=pr&el=tree#diff-Y21kL2NvbW1vbi5nbw==) | `19.48% <100%> (+7.14%)` | :arrow_up: |
| [cmd/util.go](https://codecov.io/gh/aquasecurity/kube-bench/pull/434/diff?src=pr&el=tree#diff-Y21kL3V0aWwuZ28=) | `67.44% <100%> (+0.19%)` | :arrow_up: |

------

[Continue to review full report at Codecov](https://codecov.io/gh/aquasecurity/kube-bench/pull/434?src=pr&el=continue).
> **Legend** - [Click here to learn more](https://docs.codecov.io/docs/codecov-delta)
> `Δ = absolute <relative> (impact)`, `ø = not affected`, `? = missing data`
> Powered by [Codecov](https://codecov.io/gh/aquasecurity/kube-bench/pull/434?src=pr&el=footer). Last update [16beb3e...1014a83](https://codecov.io/gh/aquasecurity/kube-bench/pull/434?src=pr&el=lastupdated). Read the [comment docs](https://docs.codecov.io/docs/pull-request-comments).


Patch:
diff --git a/cfg/node_only.yaml b/cfg/node_only.yaml
new file mode 100644
index 0000000..c27cf58
--- /dev/null
+++ b/cfg/node_only.yaml
@@ -0,0 +1,62 @@
+---
+node:
+  components:
+    - kubelet
+    - proxy
+    # kubernetes is a component to cover the config file /etc/kubernetes/config that is referred to in the benchmark
+    - kubernetes
+
+  kubernetes:
+    defaultconf: "/etc/kubernetes/config"
+
+  kubelet:
+    cafile:
+      - "/etc/kubernetes/pki/ca.crt"
+      - "/etc/kubernetes/certs/ca.crt"
+      - "/etc/kubernetes/cert/ca.pem"
+    svc:
+      # These paths must also be included
+      #  in the 'confs' property below
+      - "/etc/systemd/system/kubelet.service.d/10-kubeadm.conf"
+      - "/etc/systemd/system/kubelet.service"
+      - "/lib/systemd/system/kubelet.service"
+    bins:
+      - "hyperkube kubelet"
+      - "kubelet"
+    kubeconfig:
+      - "/etc/kubernetes/kubelet.conf"
+      - "/var/lib/kubelet/kubeconfig"
+      - "/etc/kubernetes/kubelet-kubeconfig"
+    confs:
+      - "/var/lib/kubelet/config.yaml"
+      - "/etc/kubernetes/kubelet/kubelet-config.json"
+      - "/home/kubernetes/kubelet-config.yaml"
+      - "/etc/default/kubelet"
+      ## Due to the fact that the kubelet might be configured
+      ## without a kubelet-config file, we use a work-around
+      ## of pointing to the systemd service file (which can also
+      ## hold kubelet configuration).
+      ## Note: The following paths must match the one under 'svc'
+      - "/etc/systemd/system/kubelet.service.d/10-kubeadm.conf"
+      - "/etc/systemd/system/kubelet.service"
+      - "/lib/systemd/system/kubelet.service"
+    defaultconf: "/var/lib/kubelet/config.yaml"
+    defaultsvc: "/etc/systemd/system/kubelet.service.d/10-kubeadm.conf"
+    defaultkubeconfig: "/etc/kubernetes/kubelet.conf"
+    defaultcafile: "/etc/kubernetes/pki/ca.crt"
+
+  proxy:
+    bins:
+      - "kube-proxy"
+      - "hyperkube proxy"
+      - "hyperkube kube-proxy"
+      - "proxy"
+    confs:
+      - /etc/kubernetes/proxy
+      - /etc/kubernetes/addons/kube-proxy-daemonset.yaml
+    kubeconfig:
+      - /etc/kubernetes/kubelet-kubeconfig
+    svc:
+      - "/lib/systemd/system/kube-proxy.service"
+    defaultconf: /etc/kubernetes/addons/kube-proxy-daemonset.yaml
+    defaultkubeconfig: "/etc/kubernetes/proxy.conf"
\ No newline at end of file
diff --git a/cmd/common.go b/cmd/common.go
index fda84f7..0ea5d9f 100644
--- a/cmd/common.go
+++ b/cmd/common.go
@@ -241,7 +241,11 @@ func loadConfig(nodetype check.NodeType) string {
 func isMaster() bool {
 	glog.V(2).Info("Checking if the current node is running master components")
 	masterConf := viper.Sub(string(check.MASTER))
-	components, err := getBinaries(masterConf)
+	if masterConf == nil {
+		glog.V(2).Info("No master components found to be running")
+		return false
+	}
+	components, err := getBinariesFunc(masterConf)
 
 	if err != nil {
 		glog.V(2).Info(err)
diff --git a/cmd/util.go b/cmd/util.go
index faa8e08..5c694af 100644
--- a/cmd/util.go
+++ b/cmd/util.go
@@ -27,16 +27,18 @@ var (
 
 var psFunc func(string) string
 var statFunc func(string) (os.FileInfo, error)
+var getBinariesFunc func(*viper.Viper) (map[string]string, error)
 var TypeMap = map[string][]string{
-	"ca": []string{"cafile", "defaultcafile"},
+	"ca":         []string{"cafile", "defaultcafile"},
 	"kubeconfig": []string{"kubeconfig", "defaultkubeconfig"},
-	"service": []string{"svc", "defaultsvc"},
-	"config": []string{"confs", "defaultconf"},
+	"service":    []string{"svc", "defaultsvc"},
+	"config":     []string{"confs", "defaultconf"},
 }
 
 func init() {
 	psFunc = ps
 	statFunc = os.Stat
+	getBinariesFunc = getBinaries
 }
 
 func exitWithError(err error) {
diff --git a/go.mod b/go.mod
index e8168d9..97f3959 100644
--- a/go.mod
+++ b/go.mod
@@ -8,25 +8,16 @@ require (
 	github.com/fatih/color v1.5.0
 	github.com/go-sql-driver/mysql v1.4.1 // indirect
 	github.com/golang/glog v0.0.0-20160126235308-23def4e6c14b
-	github.com/hashicorp/hcl v0.0.0-20171017181929-23c074d0eceb // indirect
 	github.com/inconshreveable/mousetrap v1.0.0 // indirect
 	github.com/jinzhu/gorm v0.0.0-20160404144928-5174cc5c242a
 	github.com/jinzhu/inflection v0.0.0-20170102125226-1c35d901db3d // indirect
 	github.com/jinzhu/now v1.0.1 // indirect
-	github.com/kr/pretty v0.1.0 // indirect
 	github.com/lib/pq v0.0.0-20171126050459-83612a56d3dd // indirect
-	github.com/magiconair/properties v0.0.0-20171031211101-49d762b9817b // indirect
 	github.com/mattn/go-colorable v0.0.0-20170210172801-5411d3eea597 // indirect
 	github.com/mattn/go-isatty v0.0.0-20170307163044-57fdcb988a5c // indirect
 	github.com/mattn/go-sqlite3 v1.10.0 // indirect
-	github.com/mitchellh/mapstructure v0.0.0-20171017171808-06020f85339e // indirect
-	github.com/pelletier/go-toml v0.0.0-20171222114548-0131db6d737c // indirect
-	github.com/spf13/afero v0.0.0-20171228125011-57afd63c6860 // indirect
-	github.com/spf13/cast v1.1.0 // indirect
 	github.com/spf13/cobra v0.0.1
-	github.com/spf13/jwalterweatherman v0.0.0-20170901151539-12bd96e66386 // indirect
-	github.com/spf13/pflag v0.0.0-20171106142849-4c012f6dcd95 // indirect
-	github.com/spf13/viper v1.0.0
+	github.com/spf13/viper v1.4.0
 	github.com/stretchr/testify v1.3.0
 	gopkg.in/yaml.v2 v2.2.2
 	k8s.io/client-go v10.0.0+incompatible
diff --git a/go.sum b/go.sum
index 9b8ea21..ea57237 100644
--- a/go.sum
+++ b/go.sum
@@ -4,6 +4,7 @@ cloud.google.com/go v0.37.4 h1:glPeL3BQJsbF6aIIYfZizMwc5LTYz250bDMjttbBGAU=
 cloud.google.com/go v0.37.4/go.mod h1:NHPJ89PdicEuT9hdPXMROBD91xc5uRDxsMtSB16k7hw=
 github.com/BurntSushi/toml v0.3.1 h1:WXkYYl6Yr3qBf1K79EBnL4mak0OimBfB0XUf9Vl28OQ=
 github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
+github.com/OneOfOne/xxhash v1.2.2/go.mod h1:HSdplMjZKSmBqAxg5vPj2TmRDmfkzw+cTzAElWljhcU=
 github.com/Shopify/sarama v1.19.0/go.mod h1:FVkBWblsNy7DGZRfXLU0O9RCGt5g3g3yEuWXgklEdEo=
 github.com/Shopify/toxiproxy v2.1.4+incompatible/go.mod h1:OXgGpZ6Cli1/URJOF1DMxUHB2q5Ap20/P/eIdh4G0pI=
 github.com/alecthomas/template v0.0.0-20160405071501-a0175ee3bccc/go.mod h1:LOuyumcjzFXgccqObfd/Ljyb9UuFJ6TxHnclSeseNhc=
@@ -11,13 +12,23 @@ github.com/alecthomas/units v0.0.0-20151022065526-2efee857e7cf/go.mod h1:ybxpYRF
 github.com/apache/thrift v0.12.0/go.mod h1:cp2SuWMxlEZw2r+iP2GNCdIi4C1qmUzdZFSVb+bacwQ=
 github.com/aquasecurity/kube-bench v0.0.29 h1:jn0odIPAx+OArSfGGjA529PxZSS4xps6gq8LlX4h5wk=
 github.com/aquasecurity/kube-bench v0.0.29/go.mod h1:OJtT6nbmq/4tkF3sIKHO8DIZz7PVXDwYlXJusc33R3Y=
+github.com/armon/consul-api v0.0.0-20180202201655-eb2c6b5be1b6/go.mod h1:grANhF5doyWs3UAsr3K4I6qtAmlQcZDesFNEHPZAzj8=
 github.com/beorn7/perks v0.0.0-20180321164747-3a771d992973/go.mod h1:Dwedo/Wpr24TaqPxmxbtue+5NUziq4I4S80YR8gNf3Q=
+github.com/beorn7/perks v1.0.0/go.mod h1:KWe93zE9D1o94FZ5RNwFwVgaQK1VOXiVxmqh+CedLV8=
+github.com/cespare/xxhash v1.1.0/go.mod h1:XrSqR1VqqWfGrhpAt58auRo0WTKS1nRRg3ghfAqPWnc=
 github.com/client9/misspell v0.3.4/go.mod h1:qj6jICC3Q7zFZvVWo7KLAzC3yx5G7kyvSDkc90ppPyw=
+github.com/coreos/bbolt v1.3.2/go.mod h1:iRUV2dpdMOn7Bo10OQBFzIJO9kkE559Wcmn+qkEiiKk=
+github.com/coreos/etcd v3.3.10+incompatible/go.mod h1:uF7uidLiAD3TWHmW31ZFd/JWoc32PjwdhPthX9715RE=
+github.com/coreos/go-semver v0.2.0/go.mod h1:nnelYz7RCh+5ahJtPPxZlU+153eP4D4r3EedlOD2RNk=
+github.com/coreos/go-systemd v0.0.0-20190321100706-95778dfbb74e/go.mod h1:F5haX7vjVVG0kc13fIWeqUViNPyEJxv/OmvnBo0Yme4=
+github.com/coreos/pkg v0.0.0-20180928190104-399ea9e2e55f/go.mod h1:E3G3o1h8I7cfcXa63jLwjI0eiQQMgzzUDFVpN/nH/eA=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/denisenkom/go-mssqldb v0.0.0-20190515213511-eb9f6a1743f3 h1:tkum0XDgfR0jcVVXuTsYv/erY2NnEDqwRojbxR1rBYA=
 github.com/denisenkom/go-mssqldb v0.0.0-20190515213511-eb9f6a1743f3/go.mod h1:zAg7JM8CkOJ43xKXIj7eRO9kmWm/TW578qo+oDO6tuM=
+github.com/dgrijalva/jwt-go v3.2.0+incompatible/go.mod h1:E3ru+11k8xSBh+hMPgOLZmtrrCbhqsmaPHjLKYnJCaQ=
+github.com/dgryski/go-sip13 v0.0.0-20181026042036-e10d5fee7954/go.mod h1:vAd38F8PWV+bWy6jNmig1y/TA+kYO4g3RSRF0IAv0no=
 github.com/eapache/go-resiliency v1.1.0/go.mod h1:kFI+JgMyC7bLPUVY133qvEBtVayf5mFgVsvEsIPBvNs=
 github.com/eapache/go-xerial-snappy v0.0.0-20180814174437-776d5712da21/go.mod h1:+020luEh2TKB4/GOp8oxxtq0Daoen/Cii55CzbTV6DU=
 github.com/eapache/queue v1.1.0/go.mod h1:6eCeP0CKFpHLu8blIFXhExK/dRa7WDZfr6jVFPTqq+I=
@@ -27,20 +38,26 @@ github.com/fatih/color v1.5.0 h1:vBh+kQp8lg9XPr56u1CPrWjFXtdphMoGWVHr9/1c+A0=
 github.com/fatih/color v1.5.0/go.mod h1:Zm6kSWBoL9eyXnKyktHP6abPY2pDugNf5KwzbycvMj4=
 github.com/fsnotify/fsnotify v1.4.7 h1:IXs+QLmnXW2CcXuY+8Mzv/fWEsPGWxqefPtCP5CnV9I=
 github.com/fsnotify/fsnotify v1.4.7/go.mod h1:jwhsz4b93w/PPRr/qN1Yymfu8t87LnFCMoQvtojpjFo=
+github.com/ghodss/yaml v1.0.0/go.mod h1:4dBDuWmgqj2HViK6kFavaiC9ZROes6MMH2rRYeMEF04=
 github.com/go-kit/kit v0.8.0/go.mod h1:xBxKIO96dXMWWy0MnWVtmwkA9/13aqxPnvrjFYMA2as=
 github.com/go-logfmt/logfmt v0.3.0/go.mod h1:Qt1PoO58o5twSAckw1HlFXLmHsOX5/0LbT9GBnD5lWE=
+github.com/go-logfmt/logfmt v0.4.0/go.mod h1:3RMwSq7FuexP4Kalkev3ejPJsZTpXXBr9+V4qmtdjCk=
 github.com/go-sql-driver/mysql v1.4.1 h1:g24URVg0OFbNUTx9qqY1IRZ9D9z3iPyi5zKhQZpNwpA=
 github.com/go-sql-driver/mysql v1.4.1/go.mod h1:zAC/RDZ24gD3HViQzih4MyKcchzm+sOG5ZlKdlhCg5w=
 github.com/go-stack/stack v1.8.0/go.mod h1:v0f6uXyyMGvRgIKkXu+yp6POWl0qKG85gN/melR3HDY=
 github.com/gogo/protobuf v1.1.1/go.mod h1:r8qH/GZQm5c6nD/R0oafs1akxWv10x8SbQlK7atdtwQ=
 github.com/gogo/protobuf v1.2.0/go.mod h1:r8qH/GZQm5c6nD/R0oafs1akxWv10x8SbQlK7atdtwQ=
+github.com/gogo/protobuf v1.2.1/go.mod h1:hp+jE20tsWTFYpLwKvXlhS1hjn+gTNwPg2I6zVXpSg4=
 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=
+github.com/golang/groupcache v0.0.0-20190129154638-5b532d6fd5ef/go.mod h1:cIg4eruTrX1D+g88fzRXU5OdNfaM+9IcxsU14FzY7Hc=
 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=
 github.com/golang/protobuf v1.2.0/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
+github.com/golang/protobuf v1.3.1/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
 github.com/golang/snappy v0.0.0-20180518054509-2e65f85255db/go.mod h1:/XxbfmMg8lxefKM7IXC3fBNl/7bRcc72aCRzEWrmP2Q=
 github.com/google/btree v0.0.0-20180813153112-4030bb1f1f0c/go.mod h1:lNA+9X1NB3Zf8V7Ke586lFgjr2dZNuvo3lPJSGZ5JPQ=
+github.com/google/btree v1.0.0/go.mod h1:lNA+9X1NB3Zf8V7Ke586lFgjr2dZNuvo3lPJSGZ5JPQ=
 github.com/google/go-cmp v0.2.0 h1:+dTQ8DZQJz0Mb/HjFlkptS1FeQ4cWSnN941F8aEG4SQ=
 github.com/google/go-cmp v0.2.0/go.mod h1:oXzfMopK8JAjlY9xF4vHSVASa0yLyX7SntLO5aqRK0M=
 github.com/google/martian v2.1.0+incompatible/go.mod h1:9I4somxYTbIHy5NJKHRl3wXiIaQGbYVAs8BPL6v8lEs=
@@ -48,9 +65,15 @@ github.com/google/pprof v0.0.0-20181206194817-3ea8567a2e57/go.mod h1:zfwlbNMJ+OI
 github.com/googleapis/gax-go/v2 v2.0.4/go.mod h1:0Wqv26UfaUD9n4G6kQubkQ+KchISgw+vpHVxEJEs9eg=
 github.com/gorilla/context v1.1.1/go.mod h1:kBGZzfjB9CEq2AlWe17Uuf7NDRt0dE0s8S51q0aT7Yg=
 github.com/gorilla/mux v1.6.2/go.mod h1:1lud6UwP+6orDFRuTfBEV8e9/aOM/c4fVVCaMa2zaAs=
+github.com/gorilla/websocket v1.4.0/go.mod h1:E7qHFY5m1UJ88s3WnNqhKjPHQ0heANvMoAMk2YaljkQ=
+github.com/grpc-ecosystem/go-grpc-middleware v1.0.0/go.mod h1:FiyG127CGDf3tlThmgyCl78X/SZQqEOJBCDaAfeWzPs=
+github.com/grpc-ecosystem/go-grpc-prometheus v1.2.0/go.mod h1:8NvIoxWQoOIhqOTXgfV/d3M/q6VIi02HzZEHgUlZvzk=
+github.com/grpc-ecosystem/grpc-gateway v1.9.0/go.mod h1:vNeuVxBJEsws4ogUvrchl83t/GYV9WGTSLVdBhOQFDY=
 github.com/hashicorp/golang-lru v0.5.0/go.mod h1:/m3WP610KZHVQ1SGc6re/UDhFvYD7pJ4Ao+sR/qLZy8=
 github.com/hashicorp/hcl v0.0.0-20171017181929-23c074d0eceb h1:1OvvPvZkn/yCQ3xBcM8y4020wdkMXPHLB4+NfoGWh4U=
 github.com/hashicorp/hcl v0.0.0-20171017181929-23c074d0eceb/go.mod h1:oZtUIOe8dh44I2q6ScRibXws4Ajl+d+nod3AaR9vL5w=
+github.com/hashicorp/hcl v1.0.0 h1:0Anlzjpi4vEasTeNFn2mLJgTSwt0+6sfsiTG8qcWGx4=
+github.com/hashicorp/hcl v1.0.0/go.mod h1:E5yfLk+7swimpb2L/Alb/PJmXilQ/rhwaUYs4T20WEQ=
 github.com/hpcloud/tail v1.0.0/go.mod h1:ab1qPbhIpdTxEkNHXyeSf5vhxWSCs/tWer42PpOxQnU=
 github.com/inconshreveable/mousetrap v1.0.0 h1:Z8tu5sraLXCXIcARxBp/8cbvlwVa7Z1NHg9XEKhtSvM=
 github.com/inconshreveable/mousetrap v1.0.0/go.mod h1:PxqpIevigyE2G7u3NXJIT2ANytuPF1OarO4DADm73n8=
@@ -60,8 +83,10 @@ github.com/jinzhu/inflection v0.0.0-20170102125226-1c35d901db3d h1:jRQLvyVGL+iVt
 github.com/jinzhu/inflection v0.0.0-20170102125226-1c35d901db3d/go.mod h1:h+uFLlag+Qp1Va5pdKtLDYj+kHp5pxUVkryuEj+Srlc=
 github.com/jinzhu/now v1.0.1 h1:HjfetcXq097iXP0uoPCdnM4Efp5/9MsM0/M+XOTeR3M=
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@@ -74,6 +99,8 @@ github.com/lib/pq v0.0.0-20171126050459-83612a56d3dd h1:2RDaVc4/izhWyAvYxNm8c9sa
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@@ -130,14 +189,17 @@ golang.org/x/exp v0.0.0-20190121172915-509febef88a4/go.mod h1:CJ0aWSM057203Lf6IL
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@@ -147,6 +209,7 @@ golang.org/x/sync v0.0.0-20190227155943-e225da77a7e6/go.mod h1:RxMgew5VJxzue5/jJ
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@@ -155,9 +218,12 @@ golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
 golang.org/x/text v0.3.1-0.20180807135948-17ff2d5776d2 h1:z99zHgr7hKfrUcX/KsoJk5FJfjTceCKIp96+biqP4To=
 golang.org/x/text v0.3.1-0.20180807135948-17ff2d5776d2/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
 golang.org/x/time v0.0.0-20181108054448-85acf8d2951c/go.mod h1:tRJNPiyCQ0inRvYxbN9jk5I+vvW/OXSQhTDSoE431IQ=
+golang.org/x/time v0.0.0-20190308202827-9d24e82272b4/go.mod h1:tRJNPiyCQ0inRvYxbN9jk5I+vvW/OXSQhTDSoE431IQ=
+golang.org/x/tools v0.0.0-20180221164845-07fd8470d635/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
 golang.org/x/tools v0.0.0-20180828015842-6cd1fcedba52/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
 golang.org/x/tools v0.0.0-20190114222345-bf090417da8b/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
 golang.org/x/tools v0.0.0-20190226205152-f727befe758c/go.mod h1:9Yl7xja0Znq3iFh3HoIrodX9oNMXvdceNzlUR8zjMvY=
+golang.org/x/tools v0.0.0-20190311212946-11955173bddd/go.mod h1:LCzVGOaR6xXOjkQ3onu1FJEFr0SW1gC7cKk1uF8kGRs=
 golang.org/x/tools v0.0.0-20190312170243-e65039ee4138/go.mod h1:LCzVGOaR6xXOjkQ3onu1FJEFr0SW1gC7cKk1uF8kGRs=
 google.golang.org/api v0.3.1/go.mod h1:6wY9I6uQWHQ8EM57III9mq/AjF+i8G65rmVagqKMtkk=
 google.golang.org/appengine v1.1.0/go.mod h1:EbEs0AVv82hx2wNQdGPgUI5lhzA/G0D9YwlJXL52JkM=
@@ -168,12 +234,15 @@ google.golang.org/genproto v0.0.0-20190307195333-5fe7a883aa19/go.mod h1:VzzqZJRn
 google.golang.org/genproto v0.0.0-20190404172233-64821d5d2107/go.mod h1:VzzqZJRnGkLBvHegQrXjBqPurQTc5/KpmUdxsrq26oE=
 google.golang.org/grpc v1.17.0/go.mod h1:6QZJwpn2B+Zp71q/5VxRsJ6NXXVCE5NRUHRo+f3cWCs=
 google.golang.org/grpc v1.19.0/go.mod h1:mqu4LbDTu4XGKhr4mRzUsmM4RtVoemTSY81AxZiDr8c=
+google.golang.org/grpc v1.21.0/go.mod h1:oYelfM1adQP15Ek0mdvEgi9Df8B9CZIaU1084ijfRaM=
 gopkg.in/alecthomas/kingpin.v2 v2.2.6/go.mod h1:FMv+mEhP44yOT+4EoQTLFTRgOQ1FBLkstjWtayDeSgw=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127 h1:qIbj1fsPNlZgppZ+VLlY7N33q108Sa+fhmuc+sWQYwY=
 gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/fsnotify.v1 v1.4.7/go.mod h1:Tz8NjZHkW78fSQdbUxIjBTcgA1z1m8ZHf0WmKUhAMys=
+gopkg.in/resty.v1 v1.12.0/go.mod h1:mDo4pnntr5jdWRML875a/NmxYqAlA73dVijT2AXvQQo=
 gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7/go.mod h1:dt/ZhP58zS4L8KSrWDmTeBkI65Dw0HsyUHuEVlX15mw=
+gopkg.in/yaml.v2 v2.0.0-20170812160011-eb3733d160e7/go.mod h1:JAlM8MvJe8wmxCU4Bli9HhUf9+ttbYbLASfIpnQbh74=
 gopkg.in/yaml.v2 v2.2.1/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v2 v2.2.2 h1:ZCJp+EgiOT7lHqUV2J862kp8Qj64Jo6az82+3Td9dZw=
 gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=


Test patch:
diff --git a/cmd/common_test.go b/cmd/common_test.go
index 418e76c..2819637 100644
--- a/cmd/common_test.go
+++ b/cmd/common_test.go
@@ -15,7 +15,9 @@
 package cmd
 
 import (
+	"errors"
 	"github.com/aquasecurity/kube-bench/check"
+	"github.com/spf13/viper"
 	"github.com/stretchr/testify/assert"
 	"testing"
 )
@@ -110,3 +112,56 @@ func TestNewRunFilter(t *testing.T) {
 	})
 
 }
+
+func TestIsMaster(t *testing.T) {
+	testCases := []struct{
+		name string
+		cfgFile string
+		getBinariesFunc func(*viper.Viper) (map[string]string, error)
+		isMaster bool
+	}{
+		{
+			name: "valid config, is master and all components are running",
+			cfgFile: "../cfg/config.yaml",
+			getBinariesFunc: func(viper *viper.Viper) (strings map[string]string, i error) {
+				return map[string]string{"apiserver": "kube-apiserver"}, nil
+			},
+			isMaster: true,
+		},
+		{
+			name: "valid config, is master and but not all components are running",
+			cfgFile: "../cfg/config.yaml",
+			getBinariesFunc: func(viper *viper.Viper) (strings map[string]string, i error) {
+				return map[string]string{}, nil
+			},
+			isMaster: false,
+		},
+		{
+			name: "valid config, is master, not all components are running and fails to find all binaries",
+			cfgFile: "../cfg/config.yaml",
+			getBinariesFunc: func(viper *viper.Viper) (strings map[string]string, i error) {
+				return map[string]string{}, errors.New("failed to find binaries")
+			},
+			isMaster: false,
+		},
+		{
+			name: "valid config, does not include master",
+			cfgFile: "../cfg/node_only.yaml",
+			isMaster: false,
+		},
+	}
+
+	for _, tc := range testCases{
+		cfgFile = tc.cfgFile
+		initConfig()
+
+		oldGetBinariesFunc := getBinariesFunc
+		getBinariesFunc = tc.getBinariesFunc
+		defer func() {
+			getBinariesFunc = oldGetBinariesFunc
+			cfgFile = ""
+		}()
+
+		assert.Equal(t, tc.isMaster, isMaster(), tc.name)
+	}
+}