Chapter 3. CustomResourceDefinition [apiextensions.k8s.io/v1]
Chapter 3. CustomResourceDefinition [apiextensions.k8s.io/v1] Description CustomResourceDefinition represents a resource that should be exposed on the API server. Its name MUST be in the format <.spec.name>.<.spec.group>. Type object Required spec 3.1. 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 CustomResourceDefinitionSpec describes how a user wants their resource to appear status object CustomResourceDefinitionStatus indicates the state of the CustomResourceDefinition 3.1.1. .spec Description CustomResourceDefinitionSpec describes how a user wants their resource to appear Type object Required group names scope versions Property Type Description conversion object CustomResourceConversion describes how to convert different versions of a CR. group string group is the API group of the defined custom resource. The custom resources are served under /apis/<group>/... . Must match the name of the CustomResourceDefinition (in the form <names.plural>.<group> ). names object CustomResourceDefinitionNames indicates the names to serve this CustomResourceDefinition preserveUnknownFields boolean preserveUnknownFields indicates that object fields which are not specified in the OpenAPI schema should be preserved when persisting to storage. apiVersion, kind, metadata and known fields inside metadata are always preserved. This field is deprecated in favor of setting x-preserve-unknown-fields to true in spec.versions[*].schema.openAPIV3Schema . See https://kubernetes.io/docs/tasks/extend-kubernetes/custom-resources/custom-resource-definitions/#field-pruning for details. scope string scope indicates whether the defined custom resource is cluster- or namespace-scoped. Allowed values are Cluster and Namespaced . versions array versions is the list of all API versions of the defined custom resource. Version names are used to compute the order in which served versions are listed in API discovery. If the version string is "kube-like", it will sort above non "kube-like" version strings, which are ordered lexicographically. "Kube-like" versions start with a "v", then are followed by a number (the major version), then optionally the string "alpha" or "beta" and another number (the minor version). These are sorted first by GA > beta > alpha (where GA is a version with no suffix such as beta or alpha), and then by comparing major version, then minor version. An example sorted list of versions: v10, v2, v1, v11beta2, v10beta3, v3beta1, v12alpha1, v11alpha2, foo1, foo10. versions[] object CustomResourceDefinitionVersion describes a version for CRD. 3.1.2. .spec.conversion Description CustomResourceConversion describes how to convert different versions of a CR. Type object Required strategy Property Type Description strategy string strategy specifies how custom resources are converted between versions. Allowed values are: - "None" : The converter only change the apiVersion and would not touch any other field in the custom resource. - "Webhook" : API Server will call to an external webhook to do the conversion. Additional information is needed for this option. This requires spec.preserveUnknownFields to be false, and spec.conversion.webhook to be set. webhook object WebhookConversion describes how to call a conversion webhook 3.1.3. .spec.conversion.webhook Description WebhookConversion describes how to call a conversion webhook Type object Required conversionReviewVersions Property Type Description clientConfig object WebhookClientConfig contains the information to make a TLS connection with the webhook. conversionReviewVersions array (string) conversionReviewVersions is an ordered list of preferred ConversionReview versions the Webhook expects. The API server will use the first version in the list which it supports. If none of the versions specified in this list are supported by API server, conversion will fail for the custom resource. If a persisted Webhook configuration specifies allowed versions and does not include any versions known to the API Server, calls to the webhook will fail. 3.1.4. .spec.conversion.webhook.clientConfig Description WebhookClientConfig contains the information to make a TLS connection with the webhook. Type object Property Type Description caBundle string caBundle is a PEM encoded CA bundle which will be used to validate the webhook's server certificate. If unspecified, system trust roots on the apiserver are used. service object ServiceReference holds a reference to Service.legacy.k8s.io url string url gives the location of the webhook, in standard URL form ( scheme://host:port/path ). Exactly one of url or service must be specified. The host should not refer to a service running in the cluster; use the service field instead. The host might be resolved via external DNS in some apiservers (e.g., kube-apiserver cannot resolve in-cluster DNS as that would be a layering violation). host may also be an IP address. Please note that using localhost or 127.0.0.1 as a host is risky unless you take great care to run this webhook on all hosts which run an apiserver which might need to make calls to this webhook. Such installs are likely to be non-portable, i.e., not easy to turn up in a new cluster. The scheme must be "https"; the URL must begin with "https://". A path is optional, and if present may be any string permissible in a URL. You may use the path to pass an arbitrary string to the webhook, for example, a cluster identifier. Attempting to use a user or basic auth e.g. "user:password@" is not allowed. Fragments ("#... ") and query parameters ("?... ") are not allowed, either. 3.1.5. .spec.conversion.webhook.clientConfig.service Description ServiceReference holds a reference to Service.legacy.k8s.io Type object Required namespace name Property Type Description name string name is the name of the service. Required namespace string namespace is the namespace of the service. Required path string path is an optional URL path at which the webhook will be contacted. port integer port is an optional service port at which the webhook will be contacted. port should be a valid port number (1-65535, inclusive). Defaults to 443 for backward compatibility. 3.1.6. .spec.names Description CustomResourceDefinitionNames indicates the names to serve this CustomResourceDefinition Type object Required plural kind Property Type Description categories array (string) categories is a list of grouped resources this custom resource belongs to (e.g. 'all'). This is published in API discovery documents, and used by clients to support invocations like kubectl get all . kind string kind is the serialized kind of the resource. It is normally CamelCase and singular. Custom resource instances will use this value as the kind attribute in API calls. listKind string listKind is the serialized kind of the list for this resource. Defaults to "`kind`List". plural string plural is the plural name of the resource to serve. The custom resources are served under /apis/<group>/<version>/... /<plural> . Must match the name of the CustomResourceDefinition (in the form <names.plural>.<group> ). Must be all lowercase. shortNames array (string) shortNames are short names for the resource, exposed in API discovery documents, and used by clients to support invocations like kubectl get <shortname> . It must be all lowercase. singular string singular is the singular name of the resource. It must be all lowercase. Defaults to lowercased kind . 3.1.7. .spec.versions Description versions is the list of all API versions of the defined custom resource. Version names are used to compute the order in which served versions are listed in API discovery. If the version string is "kube-like", it will sort above non "kube-like" version strings, which are ordered lexicographically. "Kube-like" versions start with a "v", then are followed by a number (the major version), then optionally the string "alpha" or "beta" and another number (the minor version). These are sorted first by GA > beta > alpha (where GA is a version with no suffix such as beta or alpha), and then by comparing major version, then minor version. An example sorted list of versions: v10, v2, v1, v11beta2, v10beta3, v3beta1, v12alpha1, v11alpha2, foo1, foo10. Type array 3.1.8. .spec.versions[] Description CustomResourceDefinitionVersion describes a version for CRD. Type object Required name served storage Property Type Description additionalPrinterColumns array additionalPrinterColumns specifies additional columns returned in Table output. See https://kubernetes.io/docs/reference/using-api/api-concepts/#receiving-resources-as-tables for details. If no columns are specified, a single column displaying the age of the custom resource is used. additionalPrinterColumns[] object CustomResourceColumnDefinition specifies a column for server side printing. deprecated boolean deprecated indicates this version of the custom resource API is deprecated. When set to true, API requests to this version receive a warning header in the server response. Defaults to false. deprecationWarning string deprecationWarning overrides the default warning returned to API clients. May only be set when deprecated is true. The default warning indicates this version is deprecated and recommends use of the newest served version of equal or greater stability, if one exists. name string name is the version name, e.g. "v1", "v2beta1", etc. The custom resources are served under this version at /apis/<group>/<version>/... if served is true. schema object CustomResourceValidation is a list of validation methods for CustomResources. served boolean served is a flag enabling/disabling this version from being served via REST APIs storage boolean storage indicates this version should be used when persisting custom resources to storage. There must be exactly one version with storage=true. subresources object CustomResourceSubresources defines the status and scale subresources for CustomResources. 3.1.9. .spec.versions[].additionalPrinterColumns Description additionalPrinterColumns specifies additional columns returned in Table output. See https://kubernetes.io/docs/reference/using-api/api-concepts/#receiving-resources-as-tables for details. If no columns are specified, a single column displaying the age of the custom resource is used. Type array 3.1.10. .spec.versions[].additionalPrinterColumns[] Description CustomResourceColumnDefinition specifies a column for server side printing. Type object Required name type jsonPath Property Type Description description string description is a human readable description of this column. format string format is an optional OpenAPI type definition for this column. The 'name' format is applied to the primary identifier column to assist in clients identifying column is the resource name. See https://github.com/OAI/OpenAPI-Specification/blob/master/versions/2.0.md#data-types for details. jsonPath string jsonPath is a simple JSON path (i.e. with array notation) which is evaluated against each custom resource to produce the value for this column. name string name is a human readable name for the column. priority integer priority is an integer defining the relative importance of this column compared to others. Lower numbers are considered higher priority. Columns that may be omitted in limited space scenarios should be given a priority greater than 0. type string type is an OpenAPI type definition for this column. See https://github.com/OAI/OpenAPI-Specification/blob/master/versions/2.0.md#data-types for details. 3.1.11. .spec.versions[].schema Description CustomResourceValidation is a list of validation methods for CustomResources. Type object Property Type Description openAPIV3Schema `` openAPIV3Schema is the OpenAPI v3 schema to use for validation and pruning. 3.1.12. .spec.versions[].subresources Description CustomResourceSubresources defines the status and scale subresources for CustomResources. Type object Property Type Description scale object CustomResourceSubresourceScale defines how to serve the scale subresource for CustomResources. status object CustomResourceSubresourceStatus defines how to serve the status subresource for CustomResources. Status is represented by the .status JSON path inside of a CustomResource. When set, * exposes a /status subresource for the custom resource * PUT requests to the /status subresource take a custom resource object, and ignore changes to anything except the status stanza * PUT/POST/PATCH requests to the custom resource ignore changes to the status stanza 3.1.13. .spec.versions[].subresources.scale Description CustomResourceSubresourceScale defines how to serve the scale subresource for CustomResources. Type object Required specReplicasPath statusReplicasPath Property Type Description labelSelectorPath string labelSelectorPath defines the JSON path inside of a custom resource that corresponds to Scale status.selector . Only JSON paths without the array notation are allowed. Must be a JSON Path under .status or .spec . Must be set to work with HorizontalPodAutoscaler. The field pointed by this JSON path must be a string field (not a complex selector struct) which contains a serialized label selector in string form. More info: https://kubernetes.io/docs/tasks/access-kubernetes-api/custom-resources/custom-resource-definitions#scale-subresource If there is no value under the given path in the custom resource, the status.selector value in the /scale subresource will default to the empty string. specReplicasPath string specReplicasPath defines the JSON path inside of a custom resource that corresponds to Scale spec.replicas . Only JSON paths without the array notation are allowed. Must be a JSON Path under .spec . If there is no value under the given path in the custom resource, the /scale subresource will return an error on GET. statusReplicasPath string statusReplicasPath defines the JSON path inside of a custom resource that corresponds to Scale status.replicas . Only JSON paths without the array notation are allowed. Must be a JSON Path under .status . If there is no value under the given path in the custom resource, the status.replicas value in the /scale subresource will default to 0. 3.1.14. .spec.versions[].subresources.status Description CustomResourceSubresourceStatus defines how to serve the status subresource for CustomResources. Status is represented by the .status JSON path inside of a CustomResource. When set, * exposes a /status subresource for the custom resource * PUT requests to the /status subresource take a custom resource object, and ignore changes to anything except the status stanza * PUT/POST/PATCH requests to the custom resource ignore changes to the status stanza Type object 3.1.15. .status Description CustomResourceDefinitionStatus indicates the state of the CustomResourceDefinition Type object Property Type Description acceptedNames object CustomResourceDefinitionNames indicates the names to serve this CustomResourceDefinition conditions array conditions indicate state for particular aspects of a CustomResourceDefinition conditions[] object CustomResourceDefinitionCondition contains details for the current condition of this pod. storedVersions array (string) storedVersions lists all versions of CustomResources that were ever persisted. Tracking these versions allows a migration path for stored versions in etcd. The field is mutable so a migration controller can finish a migration to another version (ensuring no old objects are left in storage), and then remove the rest of the versions from this list. Versions may not be removed from spec.versions while they exist in this list. 3.1.16. .status.acceptedNames Description CustomResourceDefinitionNames indicates the names to serve this CustomResourceDefinition Type object Required plural kind Property Type Description categories array (string) categories is a list of grouped resources this custom resource belongs to (e.g. 'all'). This is published in API discovery documents, and used by clients to support invocations like kubectl get all . kind string kind is the serialized kind of the resource. It is normally CamelCase and singular. Custom resource instances will use this value as the kind attribute in API calls. listKind string listKind is the serialized kind of the list for this resource. Defaults to "`kind`List". plural string plural is the plural name of the resource to serve. The custom resources are served under /apis/<group>/<version>/... /<plural> . Must match the name of the CustomResourceDefinition (in the form <names.plural>.<group> ). Must be all lowercase. shortNames array (string) shortNames are short names for the resource, exposed in API discovery documents, and used by clients to support invocations like kubectl get <shortname> . It must be all lowercase. singular string singular is the singular name of the resource. It must be all lowercase. Defaults to lowercased kind . 3.1.17. .status.conditions Description conditions indicate state for particular aspects of a CustomResourceDefinition Type array 3.1.18. .status.conditions[] Description CustomResourceDefinitionCondition contains details for the current condition of this pod. Type object Required type status Property Type Description lastTransitionTime Time lastTransitionTime last time the condition transitioned from one status to another. message string message is a human-readable message indicating details about last transition. reason string reason is a unique, one-word, CamelCase reason for the condition's last transition. status string status is the status of the condition. Can be True, False, Unknown. type string type is the type of the condition. Types include Established, NamesAccepted and Terminating. 3.2. API endpoints The following API endpoints are available: /apis/apiextensions.k8s.io/v1/customresourcedefinitions DELETE : delete collection of CustomResourceDefinition GET : list or watch objects of kind CustomResourceDefinition POST : create a CustomResourceDefinition /apis/apiextensions.k8s.io/v1/watch/customresourcedefinitions GET : watch individual changes to a list of CustomResourceDefinition. deprecated: use the 'watch' parameter with a list operation instead. /apis/apiextensions.k8s.io/v1/customresourcedefinitions/{name} DELETE : delete a CustomResourceDefinition GET : read the specified CustomResourceDefinition PATCH : partially update the specified CustomResourceDefinition PUT : replace the specified CustomResourceDefinition /apis/apiextensions.k8s.io/v1/watch/customresourcedefinitions/{name} GET : watch changes to an object of kind CustomResourceDefinition. deprecated: use the 'watch' parameter with a list operation instead, filtered to a single item with the 'fieldSelector' parameter. /apis/apiextensions.k8s.io/v1/customresourcedefinitions/{name}/status GET : read status of the specified CustomResourceDefinition PATCH : partially update status of the specified CustomResourceDefinition PUT : replace status of the specified CustomResourceDefinition 3.2.1. /apis/apiextensions.k8s.io/v1/customresourcedefinitions HTTP method DELETE Description delete collection of CustomResourceDefinition Table 3.1. 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 3.2. HTTP responses HTTP code Reponse body 200 - OK Status schema 401 - Unauthorized Empty HTTP method GET Description list or watch objects of kind CustomResourceDefinition Table 3.3. HTTP responses HTTP code Reponse body 200 - OK CustomResourceDefinitionList schema 401 - Unauthorized Empty HTTP method POST Description create a CustomResourceDefinition Table 3.4. 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 3.5. Body parameters Parameter Type Description body CustomResourceDefinition schema Table 3.6. HTTP responses HTTP code Reponse body 200 - OK CustomResourceDefinition schema 201 - Created CustomResourceDefinition schema 202 - Accepted CustomResourceDefinition schema 401 - Unauthorized Empty 3.2.2. /apis/apiextensions.k8s.io/v1/watch/customresourcedefinitions HTTP method GET Description watch individual changes to a list of CustomResourceDefinition. deprecated: use the 'watch' parameter with a list operation instead. Table 3.7. HTTP responses HTTP code Reponse body 200 - OK WatchEvent schema 401 - Unauthorized Empty 3.2.3. /apis/apiextensions.k8s.io/v1/customresourcedefinitions/{name} Table 3.8. Global path parameters Parameter Type Description name string name of the CustomResourceDefinition HTTP method DELETE Description delete a CustomResourceDefinition Table 3.9. 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 3.10. HTTP responses HTTP code Reponse body 200 - OK Status schema 202 - Accepted Status schema 401 - Unauthorized Empty HTTP method GET Description read the specified CustomResourceDefinition Table 3.11. HTTP responses HTTP code Reponse body 200 - OK CustomResourceDefinition schema 401 - Unauthorized Empty HTTP method PATCH Description partially update the specified CustomResourceDefinition Table 3.12. 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 3.13. HTTP responses HTTP code Reponse body 200 - OK CustomResourceDefinition schema 201 - Created CustomResourceDefinition schema 401 - Unauthorized Empty HTTP method PUT Description replace the specified CustomResourceDefinition Table 3.14. 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 3.15. Body parameters Parameter Type Description body CustomResourceDefinition schema Table 3.16. HTTP responses HTTP code Reponse body 200 - OK CustomResourceDefinition schema 201 - Created CustomResourceDefinition schema 401 - Unauthorized Empty 3.2.4. /apis/apiextensions.k8s.io/v1/watch/customresourcedefinitions/{name} Table 3.17. Global path parameters Parameter Type Description name string name of the CustomResourceDefinition HTTP method GET Description watch changes to an object of kind CustomResourceDefinition. deprecated: use the 'watch' parameter with a list operation instead, filtered to a single item with the 'fieldSelector' parameter. Table 3.18. HTTP responses HTTP code Reponse body 200 - OK WatchEvent schema 401 - Unauthorized Empty 3.2.5. /apis/apiextensions.k8s.io/v1/customresourcedefinitions/{name}/status Table 3.19. Global path parameters Parameter Type Description name string name of the CustomResourceDefinition HTTP method GET Description read status of the specified CustomResourceDefinition Table 3.20. HTTP responses HTTP code Reponse body 200 - OK CustomResourceDefinition schema 401 - Unauthorized Empty HTTP method PATCH Description partially update status of the specified CustomResourceDefinition Table 3.21. 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 3.22. HTTP responses HTTP code Reponse body 200 - OK CustomResourceDefinition schema 201 - Created CustomResourceDefinition schema 401 - Unauthorized Empty HTTP method PUT Description replace status of the specified CustomResourceDefinition Table 3.23. 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 3.24. Body parameters Parameter Type Description body CustomResourceDefinition schema Table 3.25. HTTP responses HTTP code Reponse body 200 - OK CustomResourceDefinition schema 201 - Created CustomResourceDefinition schema 401 - Unauthorized Empty