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We have multiple Kubernetes clusters deployed in "production".
eqiad & codfw
codfw are the primary Kubernetes clusters and serve real traffic. It is expected that most services are deployed identically in both in an active/active fashion.
staging, also known as
staging-eqiad, allows developers to deploy and test new versions of their project without affecting user traffic. Typically deployments will only have 1 replica in staging since it has less resources.
In addition, TLS is automatically configured for all services deployed here.
staging-codfw is intended for SREs to adjust and test the configuration of Kubernetes itself.