Last active
May 11, 2023 15:34
-
-
Save jjo/5169651d450be8cdcd95f3ba6bfe9959 to your computer and use it in GitHub Desktop.
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
#!/bin/sh | |
# Launch a Pod ab-using a privileged=true to land on a Kubernetes node cluster as root, | |
# uses `privileged: true` to then nsenter init mount its (root) namespace, | |
# hostPID and hostNetwork already set for the Pod. | |
node=${1} | |
case "${node}" in | |
"") | |
nodeSelector='' | |
podName=${USER+${USER}-}sudo-any | |
;; | |
--master) | |
shift | |
nodeSelector='"nodeSelector": { "kubernetes.io/role": "master"},' | |
podName=${USER+${USER}-}sudo-master | |
;; | |
*) | |
shift | |
nodeName=$(kubectl get node ${node} ${@} -o template --template='{{index .metadata.labels "kubernetes.io/hostname"}}') || exit 1 | |
nodeSelector='"nodeSelector": { "kubernetes.io/hostname": "'${nodeName:?}'" },' | |
podName=${USER+${USER}-}sudo-${node} | |
;; | |
esac | |
set -x | |
kubectl run ${podName:?} --restart=Never -it \ | |
--image overriden --overrides ' | |
{ | |
"spec": { | |
"hostPID": true, | |
"hostNetwork": true, | |
'"${nodeSelector?}"' | |
"tolerations": [ | |
{ "effect": "NoSchedule", "operator": "Exists" }, | |
{ "effect": "NoExecute", "operator": "Exists" } | |
], | |
"containers": [ | |
{ | |
"name": "alpine", | |
"image": "alpine:3.7", | |
"command": [ | |
"nsenter", "--mount=/proc/1/ns/mnt", "--", "su", "-" | |
], | |
"stdin": true, | |
"tty": true, | |
"resources": {"requests": {"cpu": "10m"}}, | |
"securityContext": { | |
"privileged": true | |
} | |
} | |
] | |
} | |
}' --rm --attach "$@" |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment