一键部署etcd集群
这里使用三个节点,系统版本为CentOS7
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# vim deploy-etcd.sh #!/bin/bash set -x set -e #更改这里的IP, 只支持部署3个节点etcd集群 declare -A NODE_MAP=( ["etcd0"]="192.168.71.138" ["etcd1"]="192.168.71.142" ["etcd2"]="192.168.71.145" ) etcd::download() { ETCD_VER=v3.3.9 #指定要安装的版本号 DOWNLOAD_URL=https://github.com/coreos/etcd/releases/download [ -f ${PWD}/temp-etcd/etcd ] && return curl -L ${DOWNLOAD_URL}/${ETCD_VER}/etcd-${ETCD_VER}-linux-amd64.tar.gz -o ${PWD}/etcd-${ETCD_VER}-linux-amd64.tar.gz mkdir -p ${PWD}/temp-etcd && tar xzvf ${PWD}/etcd-${ETCD_VER}-linux-amd64.tar.gz -C ${PWD}/temp-etcd --strip-components=1 } etcd::config() { local node_index=$1 cat <<EOF >${PWD}/${node_index}.conf ETCD_NAME=${node_index} ETCD_DATA_DIR="/var/lib/etcd" ETCD_INITIAL_ADVERTISE_PEER_URLS="http://${NODE_MAP[${node_index}]}:2380" ETCD_LISTEN_PEER_URLS="http://${NODE_MAP[${node_index}]}:2380" ETCD_LISTEN_CLIENT_URLS="http://${NODE_MAP[${node_index}]}:2379,http://127.0.0.1:2379" ETCD_ADVERTISE_CLIENT_URLS="http://${NODE_MAP[${node_index}]}:2379" ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster-378" ETCD_INITIAL_CLUSTER="etcd0=http://${NODE_MAP['etcd0']}:2380,etcd1=http://${NODE_MAP['etcd1']}:2380,etcd2=http://${NODE_MAP['etcd2']}:2380" ETCD_INITIAL_CLUSTER_STATE="new" # ETCD_DISCOVERY="" # ETCD_DISCOVERY_SRV="" # ETCD_DISCOVERY_FALLBACK="proxy" # ETCD_DISCOVERY_PROXY="" # # ETCD_CA_FILE="" # ETCD_CERT_FILE="" # ETCD_KEY_FILE="" # ETCD_PEER_CA_FILE="" # ETCD_PEER_CERT_FILE="" # ETCD_PEER_KEY_FILE="" EOF } etcd::gen_unit() { cat <<EOF >${PWD}/etcd.service [Unit] Description=Etcd Server After=network.target [Service] Type=notify WorkingDirectory=/var/lib/etcd EnvironmentFile=-/etc/etcd/10-etcd.conf ExecStart=/usr/bin/etcd Restart=always RestartSec=8s LimitNOFILE=40000 [Install] WantedBy=multi-user.target EOF } SSH_OPTS="-oStrictHostKeyChecking=no -oUserKnownHostsFile=/dev/null -oLogLevel=ERROR -C" etcd::scp() { local host="$1" local src=($2) local dst="$3" scp -r ${SSH_OPTS} ${src[*]} "${host}:${dst}" } etcd::ssh() { local host="$1" shift ssh ${SSH_OPTS} -t "${host}" "$@" >/dev/null 2>&1 } etcd::ssh_nowait() { local host="$1" shift ssh ${SSH_OPTS} -t "${host}" "nohup $@" >/dev/null 2>&1 & } etcd::deploy() { for key in ${!NODE_MAP[@]} do etcd::config $key etcd::ssh "root@${NODE_MAP[$key]}" "mkdir -p /var/lib/etcd /etc/etcd" etcd::scp "root@${NODE_MAP[$key]}" "${key}.conf" "/etc/etcd/10-etcd.conf" etcd::scp "root@${NODE_MAP[$key]}" "etcd.service" "/usr/lib/systemd/system" etcd::scp "root@${NODE_MAP[$key]}" "${PWD}/temp-etcd/etcd ${PWD}/temp-etcd/etcdctl" "/usr/bin" etcd::ssh "root@${NODE_MAP[$key]}" "chmod 755 /usr/bin/etcd*" etcd::ssh_nowait "root@${NODE_MAP[$key]}" "systemctl daemon-reload && systemctl enable etcd && nohup systemctl start etcd" done } etcd::clean() { for key in ${!NODE_MAP[@]} do rm -f ${PWD}/${key}.conf done rm -f ${PWD}/etcd.service } etcd::download etcd::gen_unit etcd::deploy etcd::clean echo -e "\033[32m 部署完毕! 执行 etcdctl cluster-health,检测是否OK。\033[0m"
1、准备三台机器,系统为centos7
yum install -y epel-release vim bash-c* net-tools lrzsz
2、关闭防火墙和selinux
systemctl stop firewalld && systemctl disable firewalld vim /etc/selinux/config SELINUX=disabled setenforce 0
3、校对时间
yum install -y ntp ntpdate && ntpdate pool.ntp.org
4、设置ssh互信
5、执行脚本即可
bash deploy-etcd.sh