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December 10, 2018 15:43
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Change kubernetes cluster
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#!/bin/bash | |
# | |
CUR_CLUSTER=$(basename $(readlink -f $(find ~/.kube -type l -name "config")) | awk -F'.' '{ print $2 }') | |
NEW_CLUSTER= | |
while :; do | |
case $1 in | |
-h|-\?|--help) | |
cat << EOF | |
Usage: ${0##*/} [-h] [CLUSTER] | |
Change current Kubernetes cluster. | |
-h display this help and exit | |
EOF | |
exit | |
;; | |
*) | |
if [[ -n "$1" ]]; then | |
NEW_CLUSTER="$1" | |
fi | |
esac | |
shift | |
if [[ -z $1 ]]; then | |
break; | |
fi | |
done | |
if [ -z "$NEW_CLUSTER" ]; then | |
echo "Select a new cluster:" | |
echo | |
CLUSTERS=( $(find ~/.kube -type f -name "config.*" -exec basename {} \; | awk -F'.' '{ print $2 }' | sort) ) | |
CLUSTER_OPTS=() | |
CLUSTER_LABELS=() | |
for CLUSTER in "${CLUSTERS[@]}"; do | |
CLUSTER_OPTS+=("$CLUSTER") | |
if [[ $CLUSTER == $CUR_CLUSTER ]]; then | |
CLUSTER_LABELS+=("$(tput setaf 6)$CLUSTER$(tput sgr0) (current)") | |
else | |
CLUSTER_LABELS+=("$CLUSTER") | |
fi | |
done | |
I=0 | |
for LABEL in "${CLUSTER_LABELS[@]}"; do | |
printf '%s\n' "$((++I))) $LABEL" | |
done >&2 | |
NUM_ITEMS=${#CLUSTER_LABELS[@]} | |
PS3="$(tput setaf 6) > Cluster: $(tput sgr0)" | |
while :; do | |
printf %s "${PS3}" >&2 | |
read -r INDEX | |
# Make sure that the input is either empty or that a valid index was entered. | |
[[ -z $INDEX ]] && break # empty input | |
(( INDEX >= 1 && INDEX <= NUM_ITEMS )) 2>/dev/null || { continue; } | |
break | |
done | |
if [[ -n $INDEX ]]; then | |
NEW_CLUSTER="${CLUSTER_OPTS[$INDEX - 1]}" | |
else | |
NEW_CLUSTER=$CUR_CLUSTER | |
fi | |
fi | |
if [[ -n $NEW_CLUSTER ]]; then | |
if [[ $CUR_CLUSTER != $NEW_CLUSTER ]]; then | |
rm -f ~/.kube/config | |
ln -s ~/.kube/config.$NEW_CLUSTER ~/.kube/config | |
echo "Set cluster to $(tput setaf 6)$NEW_CLUSTER$(tput sgr0)" | |
else | |
echo "Current cluster $(tput setaf 6)$CUR_CLUSTER$(tput sgr0) (not changed)" | |
fi | |
echo | |
fi |
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