k8wiz
cert-manager
Hard
Troubleshooting

A Certificate fails to issue several times in a row, for example because the issuer is misconfigured. How does cert-manager retry?

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Show answer and explanation

Answer: With an exponentially increasing delay, from 1 hour up to 32 hours by default

Explanation

After a failed issuance, cert-manager waits longer before each new attempt, starting at 1 hour and capped at 32 hours. Both limits can be changed with controller flags. This keeps a broken setup from hammering the ACME server. Once you fix the cause, 'cmctl renew' retries straight away.