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diff --git a/g3doc/user_guide/FAQ.md b/g3doc/user_guide/FAQ.md index 89df65e99..8b5cff0ab 100644 --- a/g3doc/user_guide/FAQ.md +++ b/g3doc/user_guide/FAQ.md @@ -96,6 +96,30 @@ containerd. See [issue #1765](https://gvisor.dev/issue/1765) for more details. +### I'm getting an error like `RuntimeHandler "runsc" not supported` {#runtime-handler} + +This error indicates that the Kubernetes CRI runtime was not set up to handle +`runsc` as a runtime handler. Please ensure that containerd configuration has +been created properly and containerd has been restarted. See the +[containerd quick start](containerd/quick_start.md) for more details. + +If you have ensured that containerd has been set up properly and you used +kubeadm to create your cluster please check if Docker is also installed on that +system. Kubeadm prefers using Docker if both Docker and containerd are +installed. + +Please recreate your cluster and set the `--cni-socket` option on kubeadm +commands. For example: + +```bash +kubeadm init --cni-socket=/var/run/containerd/containerd.sock` ... +``` + +To fix an existing cluster edit the `/var/lib/kubelet/kubeadm-flags.env` file +and set the `--container-runtime` flag to `remote` and set the +`--container-runtime-endpoint` flag to point to the containerd socket. e.g. +`/var/run/containerd/containerd.sock`. + ### My container cannot resolve another container's name when using Docker user defined bridge {#docker-bridge} This is normally indicated by errors like `bad address 'container-name'` when |