Chapter 3. PodDisruptionBudget [policy/v1] Description PodDisruptionBudget is an object to define the max disruption that can be caused to a collection of pods Type object 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 PodDisruptionBudgetSpec is a description of a PodDisruptionBudget. status object PodDisruptionBudgetStatus represents information about the status of a PodDisruptionBudget. Status may trail the actual state of a system. 3.1.1. .spec Description PodDisruptionBudgetSpec is a description of a PodDisruptionBudget. Type object Property Type Description maxUnavailable IntOrString An eviction is allowed if at most "maxUnavailable" pods selected by "selector" are unavailable after the eviction, i.e. even in absence of the evicted pod. For example, one can prevent all voluntary evictions by specifying 0. This is a mutually exclusive setting with "minAvailable". minAvailable IntOrString An eviction is allowed if at least "minAvailable" pods selected by "selector" will still be available after the eviction, i.e. even in the absence of the evicted pod. So for example you can prevent all voluntary evictions by specifying "100%". selector LabelSelector Label query over pods whose evictions are managed by the disruption budget. A null selector will match no pods, while an empty ({}) selector will select all pods within the namespace. unhealthyPodEvictionPolicy string UnhealthyPodEvictionPolicy defines the criteria for when unhealthy pods should be considered for eviction. Current implementation considers healthy pods, as pods that have status.conditions item with type="Ready",status="True". Valid policies are IfHealthyBudget and AlwaysAllow. If no policy is specified, the default behavior will be used, which corresponds to the IfHealthyBudget policy. IfHealthyBudget policy means that running pods (status.phase="Running"), but not yet healthy can be evicted only if the guarded application is not disrupted (status.currentHealthy is at least equal to status.desiredHealthy). Healthy pods will be subject to the PDB for eviction. AlwaysAllow policy means that all running pods (status.phase="Running"), but not yet healthy are considered disrupted and can be evicted regardless of whether the criteria in a PDB is met. This means perspective running pods of a disrupted application might not get a chance to become healthy. Healthy pods will be subject to the PDB for eviction. Additional policies may be added in the future. Clients making eviction decisions should disallow eviction of unhealthy pods if they encounter an unrecognized policy in this field. This field is beta-level. The eviction API uses this field when the feature gate PDBUnhealthyPodEvictionPolicy is enabled (enabled by default). Possible enum values: - "AlwaysAllow" policy means that all running pods (status.phase="Running"), but not yet healthy are considered disrupted and can be evicted regardless of whether the criteria in a PDB is met. This means perspective running pods of a disrupted application might not get a chance to become healthy. Healthy pods will be subject to the PDB for eviction. - "IfHealthyBudget" policy means that running pods (status.phase="Running"), but not yet healthy can be evicted only if the guarded application is not disrupted (status.currentHealthy is at least equal to status.desiredHealthy). Healthy pods will be subject to the PDB for eviction. 3.1.2. .status Description PodDisruptionBudgetStatus represents information about the status of a PodDisruptionBudget. Status may trail the actual state of a system. Type object Required disruptionsAllowed currentHealthy desiredHealthy expectedPods Property Type Description conditions array (Condition) Conditions contain conditions for PDB. The disruption controller sets the DisruptionAllowed condition. The following are known values for the reason field (additional reasons could be added in the future): - SyncFailed: The controller encountered an error and wasn't able to compute the number of allowed disruptions. Therefore no disruptions are allowed and the status of the condition will be False. - InsufficientPods: The number of pods are either at or below the number required by the PodDisruptionBudget. No disruptions are allowed and the status of the condition will be False. - SufficientPods: There are more pods than required by the PodDisruptionBudget. The condition will be True, and the number of allowed disruptions are provided by the disruptionsAllowed property. currentHealthy integer current number of healthy pods desiredHealthy integer minimum desired number of healthy pods disruptedPods object (Time) DisruptedPods contains information about pods whose eviction was processed by the API server eviction subresource handler but has not yet been observed by the PodDisruptionBudget controller. A pod will be in this map from the time when the API server processed the eviction request to the time when the pod is seen by PDB controller as having been marked for deletion (or after a timeout). The key in the map is the name of the pod and the value is the time when the API server processed the eviction request. If the deletion didn't occur and a pod is still there it will be removed from the list automatically by PodDisruptionBudget controller after some time. If everything goes smooth this map should be empty for the most of the time. Large number of entries in the map may indicate problems with pod deletions. disruptionsAllowed integer Number of pod disruptions that are currently allowed. expectedPods integer total number of pods counted by this disruption budget observedGeneration integer Most recent generation observed when updating this PDB status. DisruptionsAllowed and other status information is valid only if observedGeneration equals to PDB's object generation. 3.2. API endpoints The following API endpoints are available: /apis/policy/v1/poddisruptionbudgets GET : list or watch objects of kind PodDisruptionBudget /apis/policy/v1/watch/poddisruptionbudgets GET : watch individual changes to a list of PodDisruptionBudget. deprecated: use the 'watch' parameter with a list operation instead. /apis/policy/v1/namespaces/{namespace}/poddisruptionbudgets DELETE : delete collection of PodDisruptionBudget GET : list or watch objects of kind PodDisruptionBudget POST : create a PodDisruptionBudget /apis/policy/v1/watch/namespaces/{namespace}/poddisruptionbudgets GET : watch individual changes to a list of PodDisruptionBudget. deprecated: use the 'watch' parameter with a list operation instead. /apis/policy/v1/namespaces/{namespace}/poddisruptionbudgets/{name} DELETE : delete a PodDisruptionBudget GET : read the specified PodDisruptionBudget PATCH : partially update the specified PodDisruptionBudget PUT : replace the specified PodDisruptionBudget /apis/policy/v1/watch/namespaces/{namespace}/poddisruptionbudgets/{name} GET : watch changes to an object of kind PodDisruptionBudget. deprecated: use the 'watch' parameter with a list operation instead, filtered to a single item with the 'fieldSelector' parameter. /apis/policy/v1/namespaces/{namespace}/poddisruptionbudgets/{name}/status GET : read status of the specified PodDisruptionBudget PATCH : partially update status of the specified PodDisruptionBudget PUT : replace status of the specified PodDisruptionBudget 3.2.1. /apis/policy/v1/poddisruptionbudgets HTTP method GET Description list or watch objects of kind PodDisruptionBudget Table 3.1. HTTP responses HTTP code Reponse body 200 - OK PodDisruptionBudgetList schema 401 - Unauthorized Empty 3.2.2. /apis/policy/v1/watch/poddisruptionbudgets HTTP method GET Description watch individual changes to a list of PodDisruptionBudget. deprecated: use the 'watch' parameter with a list operation instead. Table 3.2. HTTP responses HTTP code Reponse body 200 - OK WatchEvent schema 401 - Unauthorized Empty 3.2.3. /apis/policy/v1/namespaces/{namespace}/poddisruptionbudgets HTTP method DELETE Description delete collection of PodDisruptionBudget Table 3.3. 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 Table 3.4. HTTP responses HTTP code Reponse body 200 - OK Status schema 401 - Unauthorized Empty HTTP method GET Description list or watch objects of kind PodDisruptionBudget Table 3.5. HTTP responses HTTP code Reponse body 200 - OK PodDisruptionBudgetList schema 401 - Unauthorized Empty HTTP method POST Description create a PodDisruptionBudget Table 3.6. 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 3.7. Body parameters Parameter Type Description body PodDisruptionBudget schema Table 3.8. HTTP responses HTTP code Reponse body 200 - OK PodDisruptionBudget schema 201 - Created PodDisruptionBudget schema 202 - Accepted PodDisruptionBudget schema 401 - Unauthorized Empty 3.2.4. /apis/policy/v1/watch/namespaces/{namespace}/poddisruptionbudgets HTTP method GET Description watch individual changes to a list of PodDisruptionBudget. deprecated: use the 'watch' parameter with a list operation instead. Table 3.9. HTTP responses HTTP code Reponse body 200 - OK WatchEvent schema 401 - Unauthorized Empty 3.2.5. /apis/policy/v1/namespaces/{namespace}/poddisruptionbudgets/{name} Table 3.10. Global path parameters Parameter Type Description name string name of the PodDisruptionBudget HTTP method DELETE Description delete a PodDisruptionBudget Table 3.11. 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 3.12. HTTP responses HTTP code Reponse body 200 - OK Status schema 202 - Accepted Status schema 401 - Unauthorized Empty HTTP method GET Description read the specified PodDisruptionBudget Table 3.13. HTTP responses HTTP code Reponse body 200 - OK PodDisruptionBudget schema 401 - Unauthorized Empty HTTP method PATCH Description partially update the specified PodDisruptionBudget 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. HTTP responses HTTP code Reponse body 200 - OK PodDisruptionBudget schema 201 - Created PodDisruptionBudget schema 401 - Unauthorized Empty HTTP method PUT Description replace the specified PodDisruptionBudget Table 3.16. 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 3.17. Body parameters Parameter Type Description body PodDisruptionBudget schema Table 3.18. HTTP responses HTTP code Reponse body 200 - OK PodDisruptionBudget schema 201 - Created PodDisruptionBudget schema 401 - Unauthorized Empty 3.2.6. /apis/policy/v1/watch/namespaces/{namespace}/poddisruptionbudgets/{name} Table 3.19. Global path parameters Parameter Type Description name string name of the PodDisruptionBudget HTTP method GET Description watch changes to an object of kind PodDisruptionBudget. deprecated: use the 'watch' parameter with a list operation instead, filtered to a single item with the 'fieldSelector' parameter. Table 3.20. HTTP responses HTTP code Reponse body 200 - OK WatchEvent schema 401 - Unauthorized Empty 3.2.7. /apis/policy/v1/namespaces/{namespace}/poddisruptionbudgets/{name}/status Table 3.21. Global path parameters Parameter Type Description name string name of the PodDisruptionBudget HTTP method GET Description read status of the specified PodDisruptionBudget Table 3.22. HTTP responses HTTP code Reponse body 200 - OK PodDisruptionBudget schema 401 - Unauthorized Empty HTTP method PATCH Description partially update status of the specified PodDisruptionBudget 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. HTTP responses HTTP code Reponse body 200 - OK PodDisruptionBudget schema 201 - Created PodDisruptionBudget schema 401 - Unauthorized Empty HTTP method PUT Description replace status of the specified PodDisruptionBudget Table 3.25. 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 3.26. Body parameters Parameter Type Description body PodDisruptionBudget schema Table 3.27. HTTP responses HTTP code Reponse body 200 - OK PodDisruptionBudget schema 201 - Created PodDisruptionBudget schema 401 - Unauthorized Empty

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