Crontab `@daily` marked as invalid in Rancher Cronjobs

[mmartin24]

Setup

• Rancher version: v2.9-af2463ff43418024ff86cfd9304836b7074a924a-head
• Rancher UI Extensions:
• Browser type & version: Brave v1.70.126

Describe the bug Attemtping to schedule a cronjob with @daily triggers alert symbol with text Invalid cron schedule

To Reproduce

• Install Rancher
• Go to local > Workloads > CronJobs
• Locate cronjob rke2-machine-config-cleanup-cronjob > click 3 dots menu > edit config
• Change default schedule 5 0 * * * to @daily

Result It is marked as invalid both in tooltip and with small message under the new crontab

Expected Result Should be valid (verifiable here: https://crontab.guru/#@daily) and no error sign should appear

Screenshots

Additional context

[richard-cox]

Those aren't standard syntax... but it looks like kube supports them https://kubernetes.io/docs/concepts/workloads/controllers/cron-jobs/#schedule-syntax.

We should bump https://github.com/bradymholt/cronstrue