Installation fails on Digital Ocean Kubernetes (missing EnvironmentFile in kubelet.service)

[aszs]

Sysbox installation fails on Digital Ocean Kubernetes because the install script's $KUBELET_CRIO_ARGS are not applied (and the user will see FailedCreatePodSandBox Failed to create pod sandbox: rpc error: code = Unknown desc = failed to get sandbox runtime: no runtime for "sysbox-runc" is configured). This is happening because Digitial Ocean's (Debian Bookworm) nodes' kubelet.service doesn't include a EnvironmentFile directive, adding EnvironmentFile=-/etc/default/kubelet fixes the installation.

It looks like the install script searches for EnvironmentFile in kublet.service, it should add one if it doesn't find it.

On a side note, k8s troubleshooting doc might want to mention kubectl get node <node> -o jsonpath='{.status.nodeInfo.containerRuntimeVersion}' and the kublelet command line arguments to check for to verify the runtime is running, that would have helped me figure out this problem faster.