一键部署etcd集群管理脚本

一、编写脚本

#!/bin/sh
# 安装
# ./run.sh etcd03 etcd01=http://192.168.2.44:2380,etcd02=http://192.168.2.45:2380,etcd03=http://192.168.2.46:2380

etcd --version
if [[ $? -eq 0 ]];
    then 
        echo 'etcd exists, exit!'
        exit
    else 
        yum -y  install etcd
fi


export HOST=$(ifconfig eth0 | grep 'inet'| grep -v '127.0.0.1' | cut -d: -f2 | awk '{ print $2}')
echo $HOST

tee /etc/etcd/etcd.conf <<-'EOF'
ETCD_NAME="$1"
ETCD_DATA_DIR="/var/lib/etcd/$1"
ETCD_LISTEN_PEER_URLS="http://$HOST:2380"
ETCD_LISTEN_CLIENT_URLS="http://$HOST:2379,http://127.0.0.1:2379"
ETCD_INITIAL_ADVERTISE_PEER_URLS="http://$HOST:2380"
ETCD_ADVERTISE_CLIENT_URLS="http://$HOST:2379"
ETCD_INITIAL_CLUSTER_STATE="new"
ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster1"
ETCD_INITIAL_CLUSTER="$2"
EOF

# etcd01=http://192.168.2.44:2380,etcd02=http://192.168.2.45:2380,etcd03=http://192.168.2.46:2380
# 替换掉$HOST及$1
sed -i "s%\$HOST%"$HOST"%g"  /etc/etcd/etcd.conf
sed -i "s%\$1%"$1"%g"  /etc/etcd/etcd.conf
sed -i "s%\$2%"$2"%g"  /etc/etcd/etcd.conf

tee  /usr/lib/systemd/system/etcd.service <<-'EOF'
[Unit]
Description=Etcd Server
After=network.target
After=network-online.target
Wants=network-online.target

[Service]
Type=notify
WorkingDirectory=/var/lib/etcd/
EnvironmentFile=/etc/etcd/etcd.conf
User=etcd
# set GOMAXPROCS to number of processors
ExecStart=/bin/bash -c "GOMAXPROCS=$(nproc) /usr/bin/etcd --name=\"${ETCD_NAME}\" --data-dir=\"${ETCD_DATA_DIR}\" --listen-client-urls=\"${ETCD_LISTEN_CLIENT_URLS}\" --listen-peer-urls=\"${ETCD_LISTEN_PEER_URLS}\" --advertise-client-urls=\"${ETCD_ADVERTISE_CLIENT_URLS}\" --initial-cluster-token=\"${ETCD_INITIAL_CLUSTER_TOKEN}\" --initial-cluster=\"${ETCD_INITIAL_CLUSTER}\" --initial-cluster-state=\"${ETCD_INITIAL_CLUSTER_STATE}\" "
Restart=on-failure
LimitNOFILE=65536

[Install]
WantedBy=multi-user.target
EOF

systemctl daemon-reload
systemctl start etcd
systemctl enable etcd


etcd --version
if [[ $? -eq 0 ]];
    then 
        echo 'etcd install success!'
    else 
        echo 'etcd install error!'
fi

二、运行

./run.sh etcd03 etcd01=http://192.168.2.44:2380,etcd02=http://192.168.2.45:2380,etcd03=http://192.168.2.46:2380