Comment NGINXCertificateExpiry alert label matcher (#10613)
If a valid certificate is passed via `--default-ssl-certificate` it is probably desiderable that we check its expiration! Add a comment to explain that.
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@ -737,6 +737,11 @@ controller:
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# annotations:
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# description: bad ingress config - nginx config test failed
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# summary: uninstall the latest ingress changes to allow config reloads to resume
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# # By default a fake self-signed certificate is generated as default and
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# # it is fine if it expires. If `--default-ssl-certificate` flag is used
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# # and a valid certificate passed please do not filter for `host` label!
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# # (i.e. delete `{host!="_"}` so also the default SSL certificate is
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# # checked for expiration)
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# - alert: NGINXCertificateExpiry
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# expr: (avg(nginx_ingress_controller_ssl_expire_time_seconds{host!="_"}) by (host) - time()) < 604800
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# for: 1s
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