Shutdown is called from a preStop hook on the shutdown-manager container where it will initiate a drain sequence on the Envoy proxy and block until connections are drained or a timeout is exceeded.

ShutdownManager serves shutdown manager process for Envoy proxies.

ShutdownManagerHealthCheckPath is the path used for health checks.

ShutdownManagerPort is the port Envoy shutdown manager will listen on.

ShutdownManagerReadyPath is the path used to indicate shutdown readiness.

ShutdownReadyFile is the file used to indicate shutdown readiness.