Always set LINKERD2_PROXY_INBOUND_PORTS when injecting pods #7816
Description
Currently, the injector will set a LINKERD2_PROXY_INBOUND_PORTS environment variable whenever the pod spec has exposed its container ports. This environment variable is used to discover policies. If the environment variable is not set, we error out: No inbound ports specified via LINKERD2_PROXY_INBOUND_PORTS.
If a port has not been explicitly documented in the pod spec, we will use the default policy for the cluster (or parent object). To keep the output clear from errors, we should probably always set the environment variable; when no ports are exposed, we can pass in an empty string.
See discussion for more information.
Discussed in #7765
Originally posted by karlparry February 2, 2022
We have a few pods that have no inbound listening ports. When these run we get this error in the Proxy log.
Is there anyway to stop these messages appearing in the Proxy logs?
ERROR ThreadId(01) linkerd_app::env: No inbound ports specified via LINKERD2_PROXY_INBOUND_PORTS
Using Linkerd version 2.11.X