join new member to etcd cluster

etcd_join.sh

#!/bin/bash -eu

: $1 $2
LOCAL_IP=$1
REMOTE_IP=$2

set -o pipefail

INITIAL_CLUSTER=$( \
    curl -s http://${REMOTE_IP}:2379/v2/members \
    | jq -r 'reduce .members[] as $s (""; . + $s.name + "=" + $s.peerURLs[0] + ",")' \
)

RESPONSE_CODE=$( \
    curl -s -XPOST http://${REMOTE_IP}:2379/v2/members \
    -H "Content-Type: application/json" \
    -d "{\"peerURLs\":[\"http://${LOCAL_IP}:2380\"]}" \
)

./etcd --name ${LOCAL_IP} \
    --initial-advertise-peer-urls http://${LOCAL_IP}:2380 \
    --listen-peer-urls http://0.0.0.0:2380 \
    --advertise-client-urls http://${LOCAL_IP}:2379 \
    --listen-client-urls http://0.0.0.0:2379 \
    --initial-cluster ${LOCAL_IP}=http://${LOCAL_IP}:2380,${INITIAL_CLUSTER} \
    --initial-cluster-token cluster1 \
    --initial-cluster-state existing &>${LOCAL_IP}.etcd.log &

echo $! > ${LOCAL_IP}.etcd.pid
echo "Join new member to etcd cluster (LOGFILE=${LOCAL_IP}.etcd.log, PIDFILE=${LOCAL_IP}.etcd.pid)"