Chapter 14. ImageTagMirrorSet [config.openshift.io/v1] Description ImageTagMirrorSet holds cluster-wide information about how to handle registry mirror rules on using tag pull specification. When multiple policies are defined, the outcome of the behavior is defined on each field. Compatibility level 1: Stable within a major release for a minimum of 12 months or 3 minor releases (whichever is longer). Type object Required spec 14.1. Specification Property Type Description apiVersion string APIVersion defines the versioned schema of this representation of an object. Servers should convert recognized schemas to the latest internal value, and may reject unrecognized values. More info: https://git.k8s.io/community/contributors/devel/sig-architecture/api-conventions.md#resources kind string Kind is a string value representing the REST resource this object represents. Servers may infer this from the endpoint the client submits requests to. Cannot be updated. In CamelCase. More info: https://git.k8s.io/community/contributors/devel/sig-architecture/api-conventions.md#types-kinds metadata ObjectMeta Standard object's metadata. More info: https://git.k8s.io/community/contributors/devel/sig-architecture/api-conventions.md#metadata spec object spec holds user settable values for configuration status object status contains the observed state of the resource. 14.1.1. .spec Description spec holds user settable values for configuration Type object Property Type Description imageTagMirrors array imageTagMirrors allows images referenced by image tags in pods to be pulled from alternative mirrored repository locations. The image pull specification provided to the pod will be compared to the source locations described in imageTagMirrors and the image may be pulled down from any of the mirrors in the list instead of the specified repository allowing administrators to choose a potentially faster mirror. To use mirrors to pull images using digest specification only, users should configure a list of mirrors using "ImageDigestMirrorSet" CRD. If the image pull specification matches the repository of "source" in multiple imagetagmirrorset objects, only the objects which define the most specific namespace match will be used. For example, if there are objects using quay.io/libpod and quay.io/libpod/busybox as the "source", only the objects using quay.io/libpod/busybox are going to apply for pull specification quay.io/libpod/busybox. Each "source" repository is treated independently; configurations for different "source" repositories don't interact. If the "mirrors" is not specified, the image will continue to be pulled from the specified repository in the pull spec. When multiple policies are defined for the same "source" repository, the sets of defined mirrors will be merged together, preserving the relative order of the mirrors, if possible. For example, if policy A has mirrors a, b, c and policy B has mirrors c, d, e , the mirrors will be used in the order a, b, c, d, e . If the orders of mirror entries conflict (e.g. a, b vs. b, a ) the configuration is not rejected but the resulting order is unspecified. Users who want to use a deterministic order of mirrors, should configure them into one list of mirrors using the expected order. imageTagMirrors[] object ImageTagMirrors holds cluster-wide information about how to handle mirrors in the registries config. 14.1.2. .spec.imageTagMirrors Description imageTagMirrors allows images referenced by image tags in pods to be pulled from alternative mirrored repository locations. The image pull specification provided to the pod will be compared to the source locations described in imageTagMirrors and the image may be pulled down from any of the mirrors in the list instead of the specified repository allowing administrators to choose a potentially faster mirror. To use mirrors to pull images using digest specification only, users should configure a list of mirrors using "ImageDigestMirrorSet" CRD. If the image pull specification matches the repository of "source" in multiple imagetagmirrorset objects, only the objects which define the most specific namespace match will be used. For example, if there are objects using quay.io/libpod and quay.io/libpod/busybox as the "source", only the objects using quay.io/libpod/busybox are going to apply for pull specification quay.io/libpod/busybox. Each "source" repository is treated independently; configurations for different "source" repositories don't interact. If the "mirrors" is not specified, the image will continue to be pulled from the specified repository in the pull spec. When multiple policies are defined for the same "source" repository, the sets of defined mirrors will be merged together, preserving the relative order of the mirrors, if possible. For example, if policy A has mirrors a, b, c and policy B has mirrors c, d, e , the mirrors will be used in the order a, b, c, d, e . If the orders of mirror entries conflict (e.g. a, b vs. b, a ) the configuration is not rejected but the resulting order is unspecified. Users who want to use a deterministic order of mirrors, should configure them into one list of mirrors using the expected order. Type array 14.1.3. .spec.imageTagMirrors[] Description ImageTagMirrors holds cluster-wide information about how to handle mirrors in the registries config. Type object Required source Property Type Description mirrorSourcePolicy string mirrorSourcePolicy defines the fallback policy if fails to pull image from the mirrors. If unset, the image will continue to be pulled from the repository in the pull spec. sourcePolicy is valid configuration only when one or more mirrors are in the mirror list. mirrors array (string) mirrors is zero or more locations that may also contain the same images. No mirror will be configured if not specified. Images can be pulled from these mirrors only if they are referenced by their tags. The mirrored location is obtained by replacing the part of the input reference that matches source by the mirrors entry, e.g. for registry.redhat.io/product/repo reference, a (source, mirror) pair *.redhat.io, mirror.local/redhat causes a mirror.local/redhat/product/repo repository to be used. Pulling images by tag can potentially yield different images, depending on which endpoint we pull from. Configuring a list of mirrors using "ImageDigestMirrorSet" CRD and forcing digest-pulls for mirrors avoids that issue. The order of mirrors in this list is treated as the user's desired priority, while source is by default considered lower priority than all mirrors. If no mirror is specified or all image pulls from the mirror list fail, the image will continue to be pulled from the repository in the pull spec unless explicitly prohibited by "mirrorSourcePolicy". Other cluster configuration, including (but not limited to) other imageTagMirrors objects, may impact the exact order mirrors are contacted in, or some mirrors may be contacted in parallel, so this should be considered a preference rather than a guarantee of ordering. "mirrors" uses one of the following formats: host[:port] host[:port]/namespace[/namespace...] host[:port]/namespace[/namespace...]/repo for more information about the format, see the document about the location field: https://github.com/containers/image/blob/main/docs/containers-registries.conf.5.md#choosing-a-registry-toml-table source string source matches the repository that users refer to, e.g. in image pull specifications. Setting source to a registry hostname e.g. docker.io. quay.io, or registry.redhat.io, will match the image pull specification of corressponding registry. "source" uses one of the following formats: host[:port] host[:port]/namespace[/namespace...] host[:port]/namespace[/namespace...]/repo [*.]host for more information about the format, see the document about the location field: https://github.com/containers/image/blob/main/docs/containers-registries.conf.5.md#choosing-a-registry-toml-table 14.1.4. .status Description status contains the observed state of the resource. Type object 14.2. API endpoints The following API endpoints are available: /apis/config.openshift.io/v1/imagetagmirrorsets DELETE : delete collection of ImageTagMirrorSet GET : list objects of kind ImageTagMirrorSet POST : create an ImageTagMirrorSet /apis/config.openshift.io/v1/imagetagmirrorsets/{name} DELETE : delete an ImageTagMirrorSet GET : read the specified ImageTagMirrorSet PATCH : partially update the specified ImageTagMirrorSet PUT : replace the specified ImageTagMirrorSet /apis/config.openshift.io/v1/imagetagmirrorsets/{name}/status GET : read status of the specified ImageTagMirrorSet PATCH : partially update status of the specified ImageTagMirrorSet PUT : replace status of the specified ImageTagMirrorSet 14.2.1. /apis/config.openshift.io/v1/imagetagmirrorsets HTTP method DELETE Description delete collection of ImageTagMirrorSet Table 14.1. HTTP responses HTTP code Reponse body 200 - OK Status schema 401 - Unauthorized Empty HTTP method GET Description list objects of kind ImageTagMirrorSet Table 14.2. HTTP responses HTTP code Reponse body 200 - OK ImageTagMirrorSetList schema 401 - Unauthorized Empty HTTP method POST Description create an ImageTagMirrorSet Table 14.3. Query parameters Parameter Type Description dryRun string When present, indicates that modifications should not be persisted. An invalid or unrecognized dryRun directive will result in an error response and no further processing of the request. Valid values are: - All: all dry run stages will be processed fieldValidation string fieldValidation instructs the server on how to handle objects in the request (POST/PUT/PATCH) containing unknown or duplicate fields. Valid values are: - Ignore: This will ignore any unknown fields that are silently dropped from the object, and will ignore all but the last duplicate field that the decoder encounters. This is the default behavior prior to v1.23. - Warn: This will send a warning via the standard warning response header for each unknown field that is dropped from the object, and for each duplicate field that is encountered. The request will still succeed if there are no other errors, and will only persist the last of any duplicate fields. This is the default in v1.23+ - Strict: This will fail the request with a BadRequest error if any unknown fields would be dropped from the object, or if any duplicate fields are present. The error returned from the server will contain all unknown and duplicate fields encountered. Table 14.4. Body parameters Parameter Type Description body ImageTagMirrorSet schema Table 14.5. HTTP responses HTTP code Reponse body 200 - OK ImageTagMirrorSet schema 201 - Created ImageTagMirrorSet schema 202 - Accepted ImageTagMirrorSet schema 401 - Unauthorized Empty 14.2.2. /apis/config.openshift.io/v1/imagetagmirrorsets/{name} Table 14.6. Global path parameters Parameter Type Description name string name of the ImageTagMirrorSet HTTP method DELETE Description delete an ImageTagMirrorSet Table 14.7. Query parameters Parameter Type Description dryRun string When present, indicates that modifications should not be persisted. An invalid or unrecognized dryRun directive will result in an error response and no further processing of the request. Valid values are: - All: all dry run stages will be processed Table 14.8. HTTP responses HTTP code Reponse body 200 - OK Status schema 202 - Accepted Status schema 401 - Unauthorized Empty HTTP method GET Description read the specified ImageTagMirrorSet Table 14.9. HTTP responses HTTP code Reponse body 200 - OK ImageTagMirrorSet schema 401 - Unauthorized Empty HTTP method PATCH Description partially update the specified ImageTagMirrorSet Table 14.10. Query parameters Parameter Type Description dryRun string When present, indicates that modifications should not be persisted. An invalid or unrecognized dryRun directive will result in an error response and no further processing of the request. Valid values are: - All: all dry run stages will be processed fieldValidation string fieldValidation instructs the server on how to handle objects in the request (POST/PUT/PATCH) containing unknown or duplicate fields. Valid values are: - Ignore: This will ignore any unknown fields that are silently dropped from the object, and will ignore all but the last duplicate field that the decoder encounters. This is the default behavior prior to v1.23. - Warn: This will send a warning via the standard warning response header for each unknown field that is dropped from the object, and for each duplicate field that is encountered. The request will still succeed if there are no other errors, and will only persist the last of any duplicate fields. This is the default in v1.23+ - Strict: This will fail the request with a BadRequest error if any unknown fields would be dropped from the object, or if any duplicate fields are present. The error returned from the server will contain all unknown and duplicate fields encountered. Table 14.11. HTTP responses HTTP code Reponse body 200 - OK ImageTagMirrorSet schema 401 - Unauthorized Empty HTTP method PUT Description replace the specified ImageTagMirrorSet Table 14.12. Query parameters Parameter Type Description dryRun string When present, indicates that modifications should not be persisted. An invalid or unrecognized dryRun directive will result in an error response and no further processing of the request. Valid values are: - All: all dry run stages will be processed fieldValidation string fieldValidation instructs the server on how to handle objects in the request (POST/PUT/PATCH) containing unknown or duplicate fields. Valid values are: - Ignore: This will ignore any unknown fields that are silently dropped from the object, and will ignore all but the last duplicate field that the decoder encounters. This is the default behavior prior to v1.23. - Warn: This will send a warning via the standard warning response header for each unknown field that is dropped from the object, and for each duplicate field that is encountered. The request will still succeed if there are no other errors, and will only persist the last of any duplicate fields. This is the default in v1.23+ - Strict: This will fail the request with a BadRequest error if any unknown fields would be dropped from the object, or if any duplicate fields are present. The error returned from the server will contain all unknown and duplicate fields encountered. Table 14.13. Body parameters Parameter Type Description body ImageTagMirrorSet schema Table 14.14. HTTP responses HTTP code Reponse body 200 - OK ImageTagMirrorSet schema 201 - Created ImageTagMirrorSet schema 401 - Unauthorized Empty 14.2.3. /apis/config.openshift.io/v1/imagetagmirrorsets/{name}/status Table 14.15. Global path parameters Parameter Type Description name string name of the ImageTagMirrorSet HTTP method GET Description read status of the specified ImageTagMirrorSet Table 14.16. HTTP responses HTTP code Reponse body 200 - OK ImageTagMirrorSet schema 401 - Unauthorized Empty HTTP method PATCH Description partially update status of the specified ImageTagMirrorSet Table 14.17. Query parameters Parameter Type Description dryRun string When present, indicates that modifications should not be persisted. An invalid or unrecognized dryRun directive will result in an error response and no further processing of the request. Valid values are: - All: all dry run stages will be processed fieldValidation string fieldValidation instructs the server on how to handle objects in the request (POST/PUT/PATCH) containing unknown or duplicate fields. Valid values are: - Ignore: This will ignore any unknown fields that are silently dropped from the object, and will ignore all but the last duplicate field that the decoder encounters. This is the default behavior prior to v1.23. - Warn: This will send a warning via the standard warning response header for each unknown field that is dropped from the object, and for each duplicate field that is encountered. The request will still succeed if there are no other errors, and will only persist the last of any duplicate fields. This is the default in v1.23+ - Strict: This will fail the request with a BadRequest error if any unknown fields would be dropped from the object, or if any duplicate fields are present. The error returned from the server will contain all unknown and duplicate fields encountered. Table 14.18. HTTP responses HTTP code Reponse body 200 - OK ImageTagMirrorSet schema 401 - Unauthorized Empty HTTP method PUT Description replace status of the specified ImageTagMirrorSet Table 14.19. Query parameters Parameter Type Description dryRun string When present, indicates that modifications should not be persisted. An invalid or unrecognized dryRun directive will result in an error response and no further processing of the request. Valid values are: - All: all dry run stages will be processed fieldValidation string fieldValidation instructs the server on how to handle objects in the request (POST/PUT/PATCH) containing unknown or duplicate fields. Valid values are: - Ignore: This will ignore any unknown fields that are silently dropped from the object, and will ignore all but the last duplicate field that the decoder encounters. This is the default behavior prior to v1.23. - Warn: This will send a warning via the standard warning response header for each unknown field that is dropped from the object, and for each duplicate field that is encountered. The request will still succeed if there are no other errors, and will only persist the last of any duplicate fields. This is the default in v1.23+ - Strict: This will fail the request with a BadRequest error if any unknown fields would be dropped from the object, or if any duplicate fields are present. The error returned from the server will contain all unknown and duplicate fields encountered. Table 14.20. Body parameters Parameter Type Description body ImageTagMirrorSet schema Table 14.21. HTTP responses HTTP code Reponse body 200 - OK ImageTagMirrorSet schema 201 - Created ImageTagMirrorSet schema 401 - Unauthorized Empty

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