Hi I recently joined a company who where using linkerd in production. Long story short and due to an issue with linkerd certs werent being renewed by cert-manager which caused a bunch of deployments to fall over after being rotated as they didnt have new certs. Linkerd injection was removed for crit…

Hi @go4brendon , Since you’ve already integrated Linkerd with Cert-Manager, you can take advantage of the built-in Datadog integration ( cert-manager ). It uses the metrics exposed by Cert-Manager to monitor certificate validity (e.g., remaining days until expiration) and the number of ready/unready c…

thanks @GTRekter i believe the issue stemmed from a bug from linkerd deployment in one of the versions. you’re indeed correct datadog is pulling cert_manager metrics. do you perhaps have a template to the dashboard you linked in first screenshot? that would be useful, thank you :slight_smile:

nevermind realised this is a custom cert-manager dashboard so will do the same :slight_smile: i do think im missing some metrics though dont see logs

That’s Interesting. If you’ve opened a GitHub issue for the Linkerd bug, could you share the link? I’d be happy to take a look and see what’s going on under the hood.

Linkerd Cert Monitoring

Linkerd General Discussion

go4brendon June 17, 2025, 1:19pm 4

nevermind realised this is a custom cert-manager dashboard so will do the same i do think im missing some metrics though dont see logs

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