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@cdemers
Created August 7, 2019 00:02
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Shell script to be used to simplify opening a shell in a container within a pod in a Kubernetes cluster.
#!/bin/sh
# Using this script you simply have to specify the first letters of a pod
# to open a shell, the default shell is bash, but you can specify an
# alternative as second parameter.
#
# For example, if you have the two following pods:
# - caching-service-blablabla-123123-abcdef
# - creditcard-frontend-blabla-3213213-fghijk
#
# And you want to get a bash shell into the second, you would do:
# `kshell.sh cr`
# ...and that should do the trick.
#
# And if you happend to have a pod with a container without bash, you
# could do:
# `kshell.sh cr sh`
# and that will open sh instead of the default bash.
#
# If multiple pods match, the first one is selected. For exaple:
# `kshell.sh c`
# will probably give you a bash in the `caching-service...`
#
# This script doesn't support pods with multiple containers yet, if you
# try to use it on these, you will get the familliar kubectl error about
# you having to specify a container.
if [ "$1" = "" ]; then
echo "Usage: kshell [Pod] {shell (defaults to bash)}"
exit 1
fi
NEEDLE=$1
SHELL=$2
SHELL="${SHELL:-bash}"
COLUMNS=`tput cols`
LINES=`tput lines`
TERM=xterm
for name in `kubectl get pods -o json | jq '.items[].metadata.name' -r`; do
if [[ $name == $NEEDLE* ]]; then
kubectl exec -i -t $name env COLUMNS=$COLUMNS LINES=$LINES TERM=$TERM $SHELL
exit 0
fi
done
echo "No Pod begining by $NEEDLE was found"
exit 1
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