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| #!/bin/bash -e | |
| # runInPods.sh | |
| # @description run any statement in all k8s pods with name matching a regex within a given context (kubectl config view ). | |
| # @author Nestor Urquiza | |
| # @date 20180929 | |
| # | |
| # @example1 For my-project, in my-cluster, in pods named '*nodejs*', run the 'ps -ef | grep node' command | |
| # ./runInPods.sh -c gke_my-project_us-east1-b_my-cluster -r nodejs -s "ps -ef | grep node" | |
| # | |
| # options | |
| while [[ $# -gt 1 ]]; do | |
| key="$1" | |
| case $key in | |
| -c|--context) | |
| context="$2" | |
| shift | |
| ;; | |
| -r|-regex) | |
| regex="$2" | |
| shift | |
| ;; | |
| -s|--statement) | |
| statement="$2" | |
| shift | |
| ;; | |
| *) | |
| # unknown | |
| ;; | |
| esac | |
| shift | |
| done | |
| # functions | |
| function fail() { | |
| echo $1 | |
| echo $USAGE | |
| exit 1 | |
| } | |
| # main | |
| USAGE="Usage: `basename $0` (-c, --context --- from 'kubectl config view') [-r, --regex --- defaults to all)] (-s, --statement --- any valid command)" | |
| if [ "$context" == "" ]; then | |
| fail "Context is mandatory. Find available contexts by running 'kubectl config view'" | |
| fi | |
| if [ "$regex" == "" ]; then | |
| regex=. | |
| fi | |
| if [ "$statement" == "" ]; then | |
| fail "Statement is mandatory. Use any linux command you want to run in the matching pod(s)'" | |
| fi | |
| kubectl config use-context $context | |
| command="cat <(" | |
| for line in $(kubectl get pods | \ | |
| grep "$regex" | grep Running | awk '{print $1}'); do | |
| command="kubectl exec -i $line -- $statement" | |
| echo "Running $statement in $line" | |
| eval "$command" | |
| done |
