alexeiled/nsenter Docker image is a scratch image that contains only one statically linked nsenter file.
Read the official nsenter documentation.
The nsenter is automatically updated when a new version of util-linux is released.
Enter the container:
# enter all namespaces of selected container
docker run -it --rm --privileged --pid=container:<container_name_or_ID> alexeiled/nsenter --all --target 1 -- su -Enter the Docker host:
# enter all namespaces of Docker host
docker run -it --rm --privileged --pid=host alexeiled/nsenter --all --target 1 -- su -Use helper script nsenter-node.sh to enter into any Kubernetes node by creating a new pod tolerated to the specified node.
# list Kubernetes nodes
kubectl get nodes
NAME STATUS ROLES AGE VERSION
ip-192-168-151-104.us-west-2.compute.internal Ready <none> 6d17h v1.13.7-eks-c57ff8
ip-192-168-171-140.us-west-2.compute.internal Ready <none> 5d10h v1.13.7-eks-c57ff8
# enter into selected node with default shell as superuser
./nsenter-node.sh ip-192-168-151-104.us-west-2.compute.internal
[root@ip-192-168-171-140 ~]#
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