ETCD 二 部署ETCD

 

一、单机安装部署

etcd version：v3.5.2

1.二进制包脚本安装

ETCD_VER=v3.5.2
GITHUB_URL=https://github.com/etcd-io/etcd/releases/download
DOWNLOAD_URL=${GITHUB_URL}
rm -f /tmp/etcd-${ETCD_VER}-linux-amd64.tar.gz
rm -rf /tmp/etcd-download
mkdir -p /tmp/etcd-download
curl -L ${DOWNLOAD_URL}/${ETCD_VER}/etcd-${ETCD_VER}-linux-amd64.tar.gz -o /tmp/etcd-${ETCD_VER}-linux-amd64.tar.gz
tar xzvf /tmp/etcd-${ETCD_VER}-linux-amd64.tar.gz -C /tmp/etcd-download --strip-components=1
rm -f /tmp/etcd-${ETCD_VER}-linux-amd64.tar.gz
/tmp/etcd-download/etcd --version
/tmp/etcd-download/etcdctl version

执行后，查看 etcd 版本的结果如下：

2.源码编译

（1）安装 Go 语言环境

参考：Download and install - The Go Programming Language安装 Go 语言环境，版本为 1.13+。

（2）克隆etcd源码并编译

参考：etcd中文文档 | 下载并构建

3.docker安装 docker-compose.yml

version: "3.5"
services:
  etcd:
    hostname: etcd
    image: bitnami/etcd:3
    deploy:
      replicas: 1
      restart_policy:
        condition: on-failure
    # ports:
    #   - "2379:2379"
    #   - "2380:2380"
    #   - "4001:4001"
    #   - "7001:7001"
    privileged: true
    volumes:
      - "/etcd/data:/opt/bitnami/etcd/data"
    environment:
      - "ETCD_ADVERTISE_CLIENT_URLS=http://0.0.0.0:2379"
      - "ETCD_LISTEN_CLIENT_URLS=http://0.0.0.0:2379"
      - "ETCD_LISTEN_PEER_URLS=http://0.0.0.0:2380"
      - "ETCD_INITIAL_ADVERTISE_PEER_URLS=http://0.0.0.0:2380"
      - "ALLOW_NONE_AUTHENTICATION=yes"
      - "ETCD_INITIAL_CLUSTER=node1=http://0.0.0.0:2380"
      - "ETCD_NAME=node1"
      - "ETCD_DATA_DIR=/opt/bitnami/etcd/data"
    ports:
      - 2379:2379
      - 2380:2380
    networks:
      - etcdnet

networks:
  etcdnet:
    name: etcdnet

二、集群安装部署 

引导 etcd 集群的启动有以下三种方式：

静态启动

静态启动 etcd 集群的方式要求每个成员都知道集群中的其他成员。然而很多场景中，群集成员的 IP 可能未知。因此需要借助发现服务引导 etcd 群集启动。

etcd 动态发现DNS 发现docker部署集群

docker-compose.yml

version: '3'
services:
  etcd1:
    image: "quay.io/coreos/etcd:v3.4.7"
    container_name: etcd1
    entrypoint: /usr/local/bin/etcd
    networks:
      - etcd-net
    command:
      - '--name=etcd1'
      - '--data-dir=/etcd_data'
      - '--initial-advertise-peer-urls=http://etcd1:2380'
      - '--listen-peer-urls=http://0.0.0.0:2380'
      - '--listen-client-urls=http://0.0.0.0:2379'
      - '--advertise-client-urls=http://etcd1:2379'
      - '--initial-cluster-token=mys1cr2tt1k7n'
      - '--heartbeat-interval=250'
      - '--election-timeout=1250'
      - '--initial-cluster=etcd1=http://etcd1:2380,etcd2=http://etcd2:2380,etcd3=http://etcd3:2380'
      - '--initial-cluster-state=new'
    ports:
      - "12379:2379"
      - "20001:2380"
    volumes:
      - /usr/local/etcd-cluster/etcd1/data:/etcd_data
  
  etcd2:
    image: "quay.io/coreos/etcd:v3.4.7"
    container_name: etcd2
    entrypoint: /usr/local/bin/etcd
    networks:
      - etcd-net
    command:
      - '--name=etcd2'
      - '--data-dir=/etcd_data'
      - '--initial-advertise-peer-urls=http://etcd2:2380'
      - '--listen-peer-urls=http://0.0.0.0:2380'
      - '--listen-client-urls=http://0.0.0.0:2379'
      - '--advertise-client-urls=http://etcd2:2379'
      - '--initial-cluster-token=mys1cr2tt1k7n'
      - '--heartbeat-interval=250'
      - '--election-timeout=1250'
      - '--initial-cluster=etcd1=http://etcd1:2380,etcd2=http://etcd2:2380,etcd3=http://etcd3:2380'
      - '--initial-cluster-state=new'
    ports:
      - "22379:2379"
      - "20003:2380"
    volumes:
      - /usr/local/etcd-cluster/etcd2/data:/etcd_data
  
  etcd3:
    image: "quay.io/coreos/etcd:v3.4.7"
    container_name: etcd3
    entrypoint: /usr/local/bin/etcd
    networks:
      - etcd-net
    command:
      - '--name=etcd3'
      - '--data-dir=/etcd_data'
      - '--initial-advertise-peer-urls=http://etcd3:2380'
      - '--listen-peer-urls=http://0.0.0.0:2380'
      - '--listen-client-urls=http://0.0.0.0:2379'
      - '--advertise-client-urls=http://etcd3:2379'
      - '--initial-cluster-token=mys1cr2tt1k7n'
      - '--heartbeat-interval=250'
      - '--election-timeout=1250'
      - '--initial-cluster=etcd1=http://etcd1:2380,etcd2=http://etcd2:2380,etcd3=http://etcd3:2380'
      - '--initial-cluster-state=new'
    ports:
      - "32379:2379"
      - "20005:2380"
    volumes:
      - /usr/local/etcd-cluster/etcd3/data:/etcd_data
          
networks:
  etcd-net:           # 网络
    driver: bridge    # 桥接模式

 验证集群信息：

 

三、etcd 通信安全

etcd 支持通过 TLS 协议进行的加密通信，TLS 通道可用于对等体（指 etcd 集群中的服务实例）之间的加密内部群集通信以及加密的客户端流量。