1.3. Automatically pruning images

Prerequisites

• You have access to an OpenShift Container Platform cluster using an account with cluster administrator permissions.
• Install the oc CLI.

Procedure

• Verify that the object named imagepruners.imageregistry.operator.openshift.io/cluster contains the following spec and status fields:

  spec:
    schedule: 0 0 * * *
    suspend: false
    keepTagRevisions: 3
    keepYoungerThanDuration: 60m
    keepYoungerThan: 3600000000000
    resources: {}
    affinity: {}
    nodeSelector: {}
    tolerations: []
    successfulJobsHistoryLimit: 3
    failedJobsHistoryLimit: 3
  status:
    observedGeneration: 2
    conditions:
    - type: Available
      status: "True"
      lastTransitionTime: 2019-10-09T03:13:45
      reason: Ready
      message: "Periodic image pruner has been created."
    - type: Scheduled
      status: "True"
      lastTransitionTime: 2019-10-09T03:13:45
      reason: Scheduled
      message: "Image pruner job has been scheduled."
    - type: Failed
      staus: "False"
      lastTransitionTime: 2019-10-09T03:13:45
      reason: Succeeded
      message: "Most recent image pruning job succeeded."

• schedule: CronJob formatted schedule. This is an optional field, default is daily at midnight.
• suspend: If set to true, the CronJob running pruning is suspended. This is an optional field, default is false. The initial value on new clusters is false.
• keepTagRevisions: The number of revisions per tag to keep. This is an optional field, default is 3. The initial value is 3.
• keepYoungerThanDuration: Retain images younger than this duration. This is an optional field. If a value is not specified, either keepYoungerThan or the default value 60m (60 minutes) is used.
• keepYoungerThan: Deprecated. The same as keepYoungerThanDuration, but the duration is specified as an integer in nanoseconds. This is an optional field. When keepYoungerThanDuration is set, this field is ignored.
• resources: Standard pod resource requests and limits. This is an optional field.
• affinity: Standard pod affinity. This is an optional field.
• nodeSelector: Standard pod node selector. This is an optional field.
• tolerations: Standard pod tolerations. This is an optional field.
• successfulJobsHistoryLimit: The maximum number of successful jobs to retain. Must be greater than or equal to 1 to ensure metrics are reported. This is an optional field, default is 3. The initial value is 3.
• failedJobsHistoryLimit: The maximum number of failed jobs to retain. Must be greater than or equal 1 to ensure metrics are reported. This is an optional field, default is 3. The initial value is 3.
• observedGeneration: The generation observed by the Operator.

• conditions: The standard condition objects with the following types:

  • Available: Indicates if the pruning job has been created. Reasons can be Ready or Error.
  • Scheduled: Indicates if the next pruning job has been scheduled. Reasons can be Scheduled, Suspended, or Error.
  • Failed: Indicates if the most recent pruning job failed.