ConfigReloaderSidecarErrors

Meaning

Errors encountered while the config-reloader sidecar attempts to sync configuration in a given namespace.

Impact

As a result, configuration for services such as prometheus or alertmanager maybe stale and cannot be automatically updated.'

Diagnosis

Check config-reloader logs and the configuration which it tries to reload.

Mitigation

Usually means new config was rejected by the controlled app because it contains errors such as unknown configuration sections or bad resource definitions.

You can prevent such issues with better config testing tools in CI/CD systems such as:

• yamllint
• yamale
• promtool
• jq
• yq (notice there is python and golang versions)
• conftest
• some apps have syntax checking command switch