Chapter 6. CronJob [batch/v1]
Chapter 6. CronJob [batch/v1] Description CronJob represents the configuration of a single cron job. Type object 6.1. 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 CronJobSpec describes how the job execution will look like and when it will actually run. status object CronJobStatus represents the current state of a cron job. 6.1.1. .spec Description CronJobSpec describes how the job execution will look like and when it will actually run. Type object Required schedule jobTemplate Property Type Description concurrencyPolicy string Specifies how to treat concurrent executions of a Job. Valid values are: - "Allow" (default): allows CronJobs to run concurrently; - "Forbid": forbids concurrent runs, skipping run if run hasn't finished yet; - "Replace": cancels currently running job and replaces it with a new one Possible enum values: - "Allow" allows CronJobs to run concurrently. - "Forbid" forbids concurrent runs, skipping run if hasn't finished yet. - "Replace" cancels currently running job and replaces it with a new one. failedJobsHistoryLimit integer The number of failed finished jobs to retain. Value must be non-negative integer. Defaults to 1. jobTemplate object JobTemplateSpec describes the data a Job should have when created from a template schedule string The schedule in Cron format, see https://en.wikipedia.org/wiki/Cron . startingDeadlineSeconds integer Optional deadline in seconds for starting the job if it misses scheduled time for any reason. Missed jobs executions will be counted as failed ones. successfulJobsHistoryLimit integer The number of successful finished jobs to retain. Value must be non-negative integer. Defaults to 3. suspend boolean This flag tells the controller to suspend subsequent executions, it does not apply to already started executions. Defaults to false. timeZone string The time zone name for the given schedule, see https://en.wikipedia.org/wiki/List_of_tz_database_time_zones . If not specified, this will default to the time zone of the kube-controller-manager process. The set of valid time zone names and the time zone offset is loaded from the system-wide time zone database by the API server during CronJob validation and the controller manager during execution. If no system-wide time zone database can be found a bundled version of the database is used instead. If the time zone name becomes invalid during the lifetime of a CronJob or due to a change in host configuration, the controller will stop creating new new Jobs and will create a system event with the reason UnknownTimeZone. More information can be found in https://kubernetes.io/docs/concepts/workloads/controllers/cron-jobs/#time-zones 6.1.2. .spec.jobTemplate Description JobTemplateSpec describes the data a Job should have when created from a template Type object Property Type Description metadata ObjectMeta Standard object's metadata of the jobs created from this template. More info: https://git.k8s.io/community/contributors/devel/sig-architecture/api-conventions.md#metadata spec object JobSpec describes how the job execution will look like. 6.1.3. .spec.jobTemplate.spec Description JobSpec describes how the job execution will look like. Type object Required template Property Type Description activeDeadlineSeconds integer Specifies the duration in seconds relative to the startTime that the job may be continuously active before the system tries to terminate it; value must be positive integer. If a Job is suspended (at creation or through an update), this timer will effectively be stopped and reset when the Job is resumed again. backoffLimit integer Specifies the number of retries before marking this job failed. Defaults to 6 backoffLimitPerIndex integer Specifies the limit for the number of retries within an index before marking this index as failed. When enabled the number of failures per index is kept in the pod's batch.kubernetes.io/job-index-failure-count annotation. It can only be set when Job's completionMode=Indexed, and the Pod's restart policy is Never. The field is immutable. This field is alpha-level. It can be used when the JobBackoffLimitPerIndex feature gate is enabled (disabled by default). completionMode string completionMode specifies how Pod completions are tracked. It can be NonIndexed (default) or Indexed . NonIndexed means that the Job is considered complete when there have been .spec.completions successfully completed Pods. Each Pod completion is homologous to each other. Indexed means that the Pods of a Job get an associated completion index from 0 to (.spec.completions - 1), available in the annotation batch.kubernetes.io/job-completion-index. The Job is considered complete when there is one successfully completed Pod for each index. When value is Indexed , .spec.completions must be specified and .spec.parallelism must be less than or equal to 10^5. In addition, The Pod name takes the form USD(job-name)-USD(index)-USD(random-string) , the Pod hostname takes the form USD(job-name)-USD(index) . More completion modes can be added in the future. If the Job controller observes a mode that it doesn't recognize, which is possible during upgrades due to version skew, the controller skips updates for the Job. Possible enum values: - "Indexed" is a Job completion mode. In this mode, the Pods of a Job get an associated completion index from 0 to (.spec.completions - 1). The Job is considered complete when a Pod completes for each completion index. - "NonIndexed" is a Job completion mode. In this mode, the Job is considered complete when there have been .spec.completions successfully completed Pods. Pod completions are homologous to each other. completions integer Specifies the desired number of successfully finished pods the job should be run with. Setting to null means that the success of any pod signals the success of all pods, and allows parallelism to have any positive value. Setting to 1 means that parallelism is limited to 1 and the success of that pod signals the success of the job. More info: https://kubernetes.io/docs/concepts/workloads/controllers/jobs-run-to-completion/ manualSelector boolean manualSelector controls generation of pod labels and pod selectors. Leave manualSelector unset unless you are certain what you are doing. When false or unset, the system pick labels unique to this job and appends those labels to the pod template. When true, the user is responsible for picking unique labels and specifying the selector. Failure to pick a unique label may cause this and other jobs to not function correctly. However, You may see manualSelector=true in jobs that were created with the old extensions/v1beta1 API. More info: https://kubernetes.io/docs/concepts/workloads/controllers/jobs-run-to-completion/#specifying-your-own-pod-selector maxFailedIndexes integer Specifies the maximal number of failed indexes before marking the Job as failed, when backoffLimitPerIndex is set. Once the number of failed indexes exceeds this number the entire Job is marked as Failed and its execution is terminated. When left as null the job continues execution of all of its indexes and is marked with the Complete Job condition. It can only be specified when backoffLimitPerIndex is set. It can be null or up to completions. It is required and must be less than or equal to 10^4 when is completions greater than 10^5. This field is alpha-level. It can be used when the JobBackoffLimitPerIndex feature gate is enabled (disabled by default). parallelism integer Specifies the maximum desired number of pods the job should run at any given time. The actual number of pods running in steady state will be less than this number when ((.spec.completions - .status.successful) < .spec.parallelism), i.e. when the work left to do is less than max parallelism. More info: https://kubernetes.io/docs/concepts/workloads/controllers/jobs-run-to-completion/ podFailurePolicy object PodFailurePolicy describes how failed pods influence the backoffLimit. podReplacementPolicy string podReplacementPolicy specifies when to create replacement Pods. Possible values are: - TerminatingOrFailed means that we recreate pods when they are terminating (has a metadata.deletionTimestamp) or failed. - Failed means to wait until a previously created Pod is fully terminated (has phase Failed or Succeeded) before creating a replacement Pod. When using podFailurePolicy, Failed is the the only allowed value. TerminatingOrFailed and Failed are allowed values when podFailurePolicy is not in use. This is an alpha field. Enable JobPodReplacementPolicy to be able to use this field. Possible enum values: - "Failed" means to wait until a previously created Pod is fully terminated (has phase Failed or Succeeded) before creating a replacement Pod. - "TerminatingOrFailed" means that we recreate pods when they are terminating (has a metadata.deletionTimestamp) or failed. selector LabelSelector A label query over pods that should match the pod count. Normally, the system sets this field for you. More info: https://kubernetes.io/docs/concepts/overview/working-with-objects/labels/#label-selectors suspend boolean suspend specifies whether the Job controller should create Pods or not. If a Job is created with suspend set to true, no Pods are created by the Job controller. If a Job is suspended after creation (i.e. the flag goes from false to true), the Job controller will delete all active Pods associated with this Job. Users must design their workload to gracefully handle this. Suspending a Job will reset the StartTime field of the Job, effectively resetting the ActiveDeadlineSeconds timer too. Defaults to false. template PodTemplateSpec Describes the pod that will be created when executing a job. The only allowed template.spec.restartPolicy values are "Never" or "OnFailure". More info: https://kubernetes.io/docs/concepts/workloads/controllers/jobs-run-to-completion/ ttlSecondsAfterFinished integer ttlSecondsAfterFinished limits the lifetime of a Job that has finished execution (either Complete or Failed). If this field is set, ttlSecondsAfterFinished after the Job finishes, it is eligible to be automatically deleted. When the Job is being deleted, its lifecycle guarantees (e.g. finalizers) will be honored. If this field is unset, the Job won't be automatically deleted. If this field is set to zero, the Job becomes eligible to be deleted immediately after it finishes. 6.1.4. .spec.jobTemplate.spec.podFailurePolicy Description PodFailurePolicy describes how failed pods influence the backoffLimit. Type object Required rules Property Type Description rules array A list of pod failure policy rules. The rules are evaluated in order. Once a rule matches a Pod failure, the remaining of the rules are ignored. When no rule matches the Pod failure, the default handling applies - the counter of pod failures is incremented and it is checked against the backoffLimit. At most 20 elements are allowed. rules[] object PodFailurePolicyRule describes how a pod failure is handled when the requirements are met. One of onExitCodes and onPodConditions, but not both, can be used in each rule. 6.1.5. .spec.jobTemplate.spec.podFailurePolicy.rules Description A list of pod failure policy rules. The rules are evaluated in order. Once a rule matches a Pod failure, the remaining of the rules are ignored. When no rule matches the Pod failure, the default handling applies - the counter of pod failures is incremented and it is checked against the backoffLimit. At most 20 elements are allowed. Type array 6.1.6. .spec.jobTemplate.spec.podFailurePolicy.rules[] Description PodFailurePolicyRule describes how a pod failure is handled when the requirements are met. One of onExitCodes and onPodConditions, but not both, can be used in each rule. Type object Required action Property Type Description action string Specifies the action taken on a pod failure when the requirements are satisfied. Possible values are: - FailJob: indicates that the pod's job is marked as Failed and all running pods are terminated. - FailIndex: indicates that the pod's index is marked as Failed and will not be restarted. This value is alpha-level. It can be used when the JobBackoffLimitPerIndex feature gate is enabled (disabled by default). - Ignore: indicates that the counter towards the .backoffLimit is not incremented and a replacement pod is created. - Count: indicates that the pod is handled in the default way - the counter towards the .backoffLimit is incremented. Additional values are considered to be added in the future. Clients should react to an unknown action by skipping the rule. Possible enum values: - "Count" This is an action which might be taken on a pod failure - the pod failure is handled in the default way - the counter towards .backoffLimit, represented by the job's .status.failed field, is incremented. - "FailIndex" This is an action which might be taken on a pod failure - mark the Job's index as failed to avoid restarts within this index. This action can only be used when backoffLimitPerIndex is set. - "FailJob" This is an action which might be taken on a pod failure - mark the pod's job as Failed and terminate all running pods. - "Ignore" This is an action which might be taken on a pod failure - the counter towards .backoffLimit, represented by the job's .status.failed field, is not incremented and a replacement pod is created. onExitCodes object PodFailurePolicyOnExitCodesRequirement describes the requirement for handling a failed pod based on its container exit codes. In particular, it lookups the .state.terminated.exitCode for each app container and init container status, represented by the .status.containerStatuses and .status.initContainerStatuses fields in the Pod status, respectively. Containers completed with success (exit code 0) are excluded from the requirement check. onPodConditions array Represents the requirement on the pod conditions. The requirement is represented as a list of pod condition patterns. The requirement is satisfied if at least one pattern matches an actual pod condition. At most 20 elements are allowed. onPodConditions[] object PodFailurePolicyOnPodConditionsPattern describes a pattern for matching an actual pod condition type. 6.1.7. .spec.jobTemplate.spec.podFailurePolicy.rules[].onExitCodes Description PodFailurePolicyOnExitCodesRequirement describes the requirement for handling a failed pod based on its container exit codes. In particular, it lookups the .state.terminated.exitCode for each app container and init container status, represented by the .status.containerStatuses and .status.initContainerStatuses fields in the Pod status, respectively. Containers completed with success (exit code 0) are excluded from the requirement check. Type object Required operator values Property Type Description containerName string Restricts the check for exit codes to the container with the specified name. When null, the rule applies to all containers. When specified, it should match one the container or initContainer names in the pod template. operator string Represents the relationship between the container exit code(s) and the specified values. Containers completed with success (exit code 0) are excluded from the requirement check. Possible values are: - In: the requirement is satisfied if at least one container exit code (might be multiple if there are multiple containers not restricted by the 'containerName' field) is in the set of specified values. - NotIn: the requirement is satisfied if at least one container exit code (might be multiple if there are multiple containers not restricted by the 'containerName' field) is not in the set of specified values. Additional values are considered to be added in the future. Clients should react to an unknown operator by assuming the requirement is not satisfied. Possible enum values: - "In" - "NotIn" values array (integer) Specifies the set of values. Each returned container exit code (might be multiple in case of multiple containers) is checked against this set of values with respect to the operator. The list of values must be ordered and must not contain duplicates. Value '0' cannot be used for the In operator. At least one element is required. At most 255 elements are allowed. 6.1.8. .spec.jobTemplate.spec.podFailurePolicy.rules[].onPodConditions Description Represents the requirement on the pod conditions. The requirement is represented as a list of pod condition patterns. The requirement is satisfied if at least one pattern matches an actual pod condition. At most 20 elements are allowed. Type array 6.1.9. .spec.jobTemplate.spec.podFailurePolicy.rules[].onPodConditions[] Description PodFailurePolicyOnPodConditionsPattern describes a pattern for matching an actual pod condition type. Type object Required type status Property Type Description status string Specifies the required Pod condition status. To match a pod condition it is required that the specified status equals the pod condition status. Defaults to True. type string Specifies the required Pod condition type. To match a pod condition it is required that specified type equals the pod condition type. 6.1.10. .status Description CronJobStatus represents the current state of a cron job. Type object Property Type Description active array (ObjectReference) A list of pointers to currently running jobs. lastScheduleTime Time Information when was the last time the job was successfully scheduled. lastSuccessfulTime Time Information when was the last time the job successfully completed. 6.2. API endpoints The following API endpoints are available: /apis/batch/v1/cronjobs GET : list or watch objects of kind CronJob /apis/batch/v1/watch/cronjobs GET : watch individual changes to a list of CronJob. deprecated: use the 'watch' parameter with a list operation instead. /apis/batch/v1/namespaces/{namespace}/cronjobs DELETE : delete collection of CronJob GET : list or watch objects of kind CronJob POST : create a CronJob /apis/batch/v1/watch/namespaces/{namespace}/cronjobs GET : watch individual changes to a list of CronJob. deprecated: use the 'watch' parameter with a list operation instead. /apis/batch/v1/namespaces/{namespace}/cronjobs/{name} DELETE : delete a CronJob GET : read the specified CronJob PATCH : partially update the specified CronJob PUT : replace the specified CronJob /apis/batch/v1/watch/namespaces/{namespace}/cronjobs/{name} GET : watch changes to an object of kind CronJob. deprecated: use the 'watch' parameter with a list operation instead, filtered to a single item with the 'fieldSelector' parameter. /apis/batch/v1/namespaces/{namespace}/cronjobs/{name}/status GET : read status of the specified CronJob PATCH : partially update status of the specified CronJob PUT : replace status of the specified CronJob 6.2.1. /apis/batch/v1/cronjobs HTTP method GET Description list or watch objects of kind CronJob Table 6.1. HTTP responses HTTP code Reponse body 200 - OK CronJobList schema 401 - Unauthorized Empty 6.2.2. /apis/batch/v1/watch/cronjobs HTTP method GET Description watch individual changes to a list of CronJob. deprecated: use the 'watch' parameter with a list operation instead. Table 6.2. HTTP responses HTTP code Reponse body 200 - OK WatchEvent schema 401 - Unauthorized Empty 6.2.3. /apis/batch/v1/namespaces/{namespace}/cronjobs HTTP method DELETE Description delete collection of CronJob Table 6.3. 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 6.4. HTTP responses HTTP code Reponse body 200 - OK Status schema 401 - Unauthorized Empty HTTP method GET Description list or watch objects of kind CronJob Table 6.5. HTTP responses HTTP code Reponse body 200 - OK CronJobList schema 401 - Unauthorized Empty HTTP method POST Description create a CronJob Table 6.6. 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 6.7. Body parameters Parameter Type Description body CronJob schema Table 6.8. HTTP responses HTTP code Reponse body 200 - OK CronJob schema 201 - Created CronJob schema 202 - Accepted CronJob schema 401 - Unauthorized Empty 6.2.4. /apis/batch/v1/watch/namespaces/{namespace}/cronjobs HTTP method GET Description watch individual changes to a list of CronJob. deprecated: use the 'watch' parameter with a list operation instead. Table 6.9. HTTP responses HTTP code Reponse body 200 - OK WatchEvent schema 401 - Unauthorized Empty 6.2.5. /apis/batch/v1/namespaces/{namespace}/cronjobs/{name} Table 6.10. Global path parameters Parameter Type Description name string name of the CronJob HTTP method DELETE Description delete a CronJob Table 6.11. 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 6.12. HTTP responses HTTP code Reponse body 200 - OK Status schema 202 - Accepted Status schema 401 - Unauthorized Empty HTTP method GET Description read the specified CronJob Table 6.13. HTTP responses HTTP code Reponse body 200 - OK CronJob schema 401 - Unauthorized Empty HTTP method PATCH Description partially update the specified CronJob Table 6.14. 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 6.15. HTTP responses HTTP code Reponse body 200 - OK CronJob schema 201 - Created CronJob schema 401 - Unauthorized Empty HTTP method PUT Description replace the specified CronJob Table 6.16. 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 6.17. Body parameters Parameter Type Description body CronJob schema Table 6.18. HTTP responses HTTP code Reponse body 200 - OK CronJob schema 201 - Created CronJob schema 401 - Unauthorized Empty 6.2.6. /apis/batch/v1/watch/namespaces/{namespace}/cronjobs/{name} Table 6.19. Global path parameters Parameter Type Description name string name of the CronJob HTTP method GET Description watch changes to an object of kind CronJob. deprecated: use the 'watch' parameter with a list operation instead, filtered to a single item with the 'fieldSelector' parameter. Table 6.20. HTTP responses HTTP code Reponse body 200 - OK WatchEvent schema 401 - Unauthorized Empty 6.2.7. /apis/batch/v1/namespaces/{namespace}/cronjobs/{name}/status Table 6.21. Global path parameters Parameter Type Description name string name of the CronJob HTTP method GET Description read status of the specified CronJob Table 6.22. HTTP responses HTTP code Reponse body 200 - OK CronJob schema 401 - Unauthorized Empty HTTP method PATCH Description partially update status of the specified CronJob Table 6.23. 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 6.24. HTTP responses HTTP code Reponse body 200 - OK CronJob schema 201 - Created CronJob schema 401 - Unauthorized Empty HTTP method PUT Description replace status of the specified CronJob Table 6.25. 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 6.26. Body parameters Parameter Type Description body CronJob schema Table 6.27. HTTP responses HTTP code Reponse body 200 - OK CronJob schema 201 - Created CronJob schema 401 - Unauthorized Empty