etcd-check.sh

#!/bin/bash

set -o pipefail
if [ -n "$VERBOSE" ]; then
  set -o xtrace
fi

scratch=$(mktemp -d)

cleanup() {
  rm -rf $scratch
}
trap cleanup EXIT

etcds=$(kubectl -n kube-system get pods -l component=etcd --field-selector=status.phase=Running -o jsonpath='{.items[*].metadata.name}')
echo $etcds | cut -d' ' -f1 | xargs -I{} kubectl -n kube-system cp {}:/etc/kubernetes/pki/etcd $scratch
export ETCDCTL_API=3
export ETCDCTL_CACERT=$scratch/ca.crt
export ETCDCTL_CERT=$scratch/peer.crt
export ETCDCTL_KEY=$scratch/peer.key

startingPort=5000
cmd=""

port=$(($startingPort-1))

for e in $etcds; do
  port=$(($port+1))
  cmd+="kubectl -n kube-system port-forward $e $port:2379 >/dev/null"
  if [ -n "$VERBOSE" ]; then
    cmd+=" & "
  else
    cmd+=" >/dev/null 2>&1 & "
  fi
done
setsid sh -c "$cmd" &
pgid=$!
if [ -n "$VERBOSE" ]; then
  echo "$cmd"
  echo "Background tasks are running in process group $pgid, kill with kill -TERM -$pgid"
fi

etcdctl $(printf -- "--endpoints 127.0.0.1:%s " $(seq $startingPort $port)) member list -w table
etcdctl $(printf -- "--endpoints 127.0.0.1:%s " $(seq $startingPort $port)) endpoint status -w table

kill -TERM -$pgid