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ef985f8628
The grpc, grpc-tcp, and ttrpc server plugins enumerated their services
through ic.GetByType, which short-circuits on the first plugin whose
Instance() returned an error. A single failed gRPC plugin (e.g. CRI
under rootless, which cannot watch /etc/cni/net.d) therefore prevented
the server plugins from initialising, leaving /run/containerd/containerd.sock
uncreated.
Iterate the plugin set directly and skip plugins that failed to
initialise, restoring the pre-c15ec2485 behaviour where the listener
is still created and only the failed services are missing.
Fixes: c15ec2485 ("Add server plugins for grpc and ttrpc")
Fixes: https://github.com/containerd/containerd/issues/13362
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Signed-off-by: Akihiro Suda <akihiro.suda.cz@hco.ntt.co.jp>