theshire/kubernetes/tools/nsenter.sh

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#!/bin/sh
set -x
node=${1}
#nodeName=$(kubectl get node ${node} -o template --template='{{index .metadata.labels "kubernetes.io/hostname"}}')
nodeSelector='"nodeSelector": { "kubernetes.io/hostname": "'${node:?}'" },'
podName=${USER}-nsenter-${node}
kubectl -n kube-system run ${podName:?} --restart=Never -it --rm --image overriden --overrides '
{
"spec": {
"hostPID": true,
"hostNetwork": true,
'"${nodeSelector?}"'
"tolerations": [{
"operator": "Exists"
}],
"containers": [
{
"name": "nsenter",
"image": "mirror.gcr.io/library/busybox:musl",
"command": ["sh", "-c", "mkdir -p /host/var/lib/busybox; cp -r /bin/busybox /host/var/lib/busybox/; export PATH=\"$PATH:/var/lib/busybox\"; /host/var/lib/busybox/busybox --install /host/var/lib/busybox; nsenter -t1 -m -u -i -n /var/lib/busybox/busybox sh"],
"stdin": true,
"tty": true,
"securityContext": {
"privileged": true
},
"volumeMounts": [
{
"name": "host-tmp",
"mountPath": "/host/var"
}
]
}
],
"volumes": [
{
"name": "host-tmp",
"hostPath": {
"path": "/var"
}
}
]
}
}'