Chapter 6. CronJob [batch/v1]

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 next run if previous 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 next run if previous 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

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.

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 beta-level. It can be used when the JobBackoffLimitPerIndex feature gate is enabled (enabled 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 $(job-name)-$(index)-$(random-string), the Pod hostname takes the form $(job-name)-$(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/

managedBy

string

ManagedBy field indicates the controller that manages a Job. The k8s Job controller reconciles jobs which don’t have this field at all or the field value is the reserved string kubernetes.io/job-controller, but skips reconciling Jobs with a custom value for this field. The value must be a valid domain-prefixed path (e.g. acme.io/foo) - all characters before the first "/" must be a valid subdomain as defined by RFC 1123. All characters trailing the first "/" must be valid HTTP Path characters as defined by RFC 3986. The value cannot exceed 64 characters.

This field is alpha-level. The job controller accepts setting the field when the feature gate JobManagedBy is enabled (disabled by default).

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 beta-level. It can be used when the JobBackoffLimitPerIndex feature gate is enabled (enabled 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 beta field. To use this, enable the JobPodReplacementPolicy feature toggle. This is on by default.

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

successPolicy

object

SuccessPolicy describes when a Job can be declared as succeeded based on the success of some indexes.

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.

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.

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 beta-level. It can be used when the JobBackoffLimitPerIndex feature gate is enabled (enabled 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. This value is beta-level. - "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.

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.

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.

rules

array

rules represents the list of alternative rules for the declaring the Jobs as successful before .status.succeeded >= .spec.completions. Once any of the rules are met, the "SucceededCriteriaMet" condition is added, and the lingering pods are removed. The terminal state for such a Job has the "Complete" condition. Additionally, these rules are evaluated in order; Once the Job meets one of the rules, other rules are ignored. At most 20 elements are allowed.

rules[]

object

SuccessPolicyRule describes rule for declaring a Job as succeeded. Each rule must have at least one of the "succeededIndexes" or "succeededCount" specified.

succeededCount

integer

succeededCount specifies the minimal required size of the actual set of the succeeded indexes for the Job. When succeededCount is used along with succeededIndexes, the check is constrained only to the set of indexes specified by succeededIndexes. For example, given that succeededIndexes is "1-4", succeededCount is "3", and completed indexes are "1", "3", and "5", the Job isn’t declared as succeeded because only "1" and "3" indexes are considered in that rules. When this field is null, this doesn’t default to any value and is never evaluated at any time. When specified it needs to be a positive integer.

succeededIndexes

string

succeededIndexes specifies the set of indexes which need to be contained in the actual set of the succeeded indexes for the Job. The list of indexes must be within 0 to ".spec.completions-1" and must not contain duplicates. At least one element is required. The indexes are represented as intervals separated by commas. The intervals can be a decimal integer or a pair of decimal integers separated by a hyphen. The number are listed in represented by the first and last element of the series, separated by a hyphen. For example, if the completed indexes are 1, 3, 4, 5 and 7, they are represented as "1,3-5,7". When this field is null, this field doesn’t default to any value and is never evaluated at any time.

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.

200 - OK

CronJobList schema

401 - Unauthorized

Empty

200 - OK

WatchEvent schema

401 - Unauthorized

Empty

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

200 - OK

Status schema

401 - Unauthorized

Empty

200 - OK

CronJobList schema

401 - Unauthorized

Empty

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.

body

CronJob schema

200 - OK

CronJob schema

201 - Created

CronJob schema

202 - Accepted

CronJob schema

401 - Unauthorized

Empty

200 - OK

WatchEvent schema

401 - Unauthorized

Empty

name

string

name of the CronJob

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

200 - OK

Status schema

202 - Accepted

Status schema

401 - Unauthorized

Empty

200 - OK

CronJob schema

401 - Unauthorized

Empty

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.

200 - OK

CronJob schema

201 - Created

CronJob schema

401 - Unauthorized

Empty

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.

body

CronJob schema

200 - OK

CronJob schema

201 - Created

CronJob schema

401 - Unauthorized

Empty

name

string

name of the CronJob

200 - OK

WatchEvent schema

401 - Unauthorized

Empty

name

string

name of the CronJob

200 - OK

CronJob schema

401 - Unauthorized

Empty

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.

200 - OK

CronJob schema

201 - Created

CronJob schema

401 - Unauthorized

Empty

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.

body

CronJob schema

200 - OK

CronJob schema

201 - Created

CronJob schema

401 - Unauthorized

Empty