kubernetes - Kubernetes CronJob concurrencyPolicy是否按预期工作？

Question

由于Kubernetes docs

A cron job creates a job object about once per execution time of its schedule. We say “about” because there are certain circumstances where two jobs might be created, or no job might be created. We attempt to make these rare, but do not completely prevent them. Therefore, jobs should be idempotent

而且CronJob也具有参数:concurrencyPolicy(允许，禁止)

因此，我是否可以期望如果将concurrencyPolicy = Forbidden设置为CronJob始终在单个实例中运行？

Answer 1

在某些情况下，CronJob每次运行可以调度多个Job，这是CronJob并发性，默认情况下设置为Allow。

将策略设置为Forbid时，为it won't allow Jobs to be started until previous Jobs have completed or timed out。

因此，基本上，使用Forbid策略，如果先前的运行仍处于 Activity 状态，则将跳过即将到来的Jobs。