Linux 安装etcd

etcd 是一个高度一致的分布式键值存储，它提供了一种可靠的方式来存储需要由分布式系统或机器集群访问的数据。它可以优雅地处理网络分区期间的领导者选举，即使在领导者节点中也可以容忍机器故障。常在分布式系统中存储着关键的数据。本文主要介绍 etcd的安装。

1、安装 etcd

1）下载安装文件

wget https://github.com/etcd-io/etcd/releases/download/v3.4.4/etcd-v3.4.4-linux-amd64.tar.gz

2）解压安装文件

tar -xzvf etcd-v3.4.4-linux-amd64.tar.gz

3）安装文件至/usr/bin目录

mv etcd-v3.4.4-linux-amd64/etcd* /usr/bin

4）配置服务

vi /lib/systemd/system/etcd.service

添加如下内容：

[Unit]Description=Etcd ServerAfter=network.targetAfter=network-online.targetWants=network-online.target[Service]Type=notifyWorkingDirectory=/var/lib/etcd/EnvironmentFile=/etc/etcd/etcd.confUser=etcd# set GOMAXPROCS to number of processorsExecStart=/bin/bash -c "GOMAXPROCS=$(nproc) /usr/bin/etcd --name=\"${ETCD_NAME}\" --data-dir=\"${ETCD_DATA_DIR}\" --listen-client-urls=\"${ETCD_LISTEN_CLIENT_URLS}\""
Restart=on-failureLimitNOFILE=65536[Install]WantedBy=multi-user.target

5）配置文件

vi /etc/etcd/etcd.conf

如机器IP为192.168.31.241，需要修改成配置如下：

ETCD_LISTEN_PEER_URLS="http://localhost:2380,http://192.168.31.241:2380"ETCD_LISTEN_CLIENT_URLS="http://localhost:2379,http://192.168.31.241:2379"

配置文件完整内容如下：

#[Member]#ETCD_CORS=""ETCD_DATA_DIR="/var/lib/etcd/default.etcd"#ETCD_WAL_DIR=""ETCD_LISTEN_PEER_URLS="http://localhost:2380,http://192.168.31.241:2380"ETCD_LISTEN_CLIENT_URLS="http://localhost:2379,http://192.168.31.241:2379"#ETCD_MAX_SNAPSHOTS="5"#ETCD_MAX_WALS="5"ETCD_NAME="default"#ETCD_SNAPSHOT_COUNT="100000"#ETCD_HEARTBEAT_INTERVAL="100"#ETCD_ELECTION_TIMEOUT="1000"#ETCD_QUOTA_BACKEND_BYTES="0"#ETCD_MAX_REQUEST_BYTES="1572864"#ETCD_GRPC_KEEPALIVE_MIN_TIME="5s"#ETCD_GRPC_KEEPALIVE_INTERVAL="2h0m0s"#ETCD_GRPC_KEEPALIVE_TIMEOUT="20s"##[Clustering]#ETCD_INITIAL_ADVERTISE_PEER_URLS="http://localhost:2380"ETCD_ADVERTISE_CLIENT_URLS="http://localhost:2379"#ETCD_DISCOVERY=""#ETCD_DISCOVERY_FALLBACK="proxy"#ETCD_DISCOVERY_PROXY=""#ETCD_DISCOVERY_SRV=""#ETCD_INITIAL_CLUSTER="default=http://localhost:2380"#ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster"#ETCD_INITIAL_CLUSTER_STATE="new"#ETCD_STRICT_RECONFIG_CHECK="true"#ETCD_ENABLE_V2="true"##[Proxy]#ETCD_PROXY="off"#ETCD_PROXY_FAILURE_WAIT="5000"#ETCD_PROXY_REFRESH_INTERVAL="30000"#ETCD_PROXY_DIAL_TIMEOUT="1000"#ETCD_PROXY_WRITE_TIMEOUT="5000"#ETCD_PROXY_READ_TIMEOUT="0"##[Security]#ETCD_CERT_FILE=""#ETCD_KEY_FILE=""#ETCD_CLIENT_CERT_AUTH="false"#ETCD_TRUSTED_CA_FILE=""#ETCD_AUTO_TLS="false"#ETCD_PEER_CERT_FILE=""#ETCD_PEER_KEY_FILE=""#ETCD_PEER_CLIENT_CERT_AUTH="false"#ETCD_PEER_TRUSTED_CA_FILE=""#ETCD_PEER_AUTO_TLS="false"##[Logging]#ETCD_DEBUG="false"#ETCD_LOG_PACKAGE_LEVELS=""#ETCD_LOG_OUTPUT="default"##[Unsafe]#ETCD_FORCE_NEW_CLUSTER="false"##[Version]#ETCD_VERSION="false"#ETCD_AUTO_COMPACTION_RETENTION="0"##[Profiling]#ETCD_ENABLE_PPROF="false"#ETCD_METRICS="basic"##[Auth]#ETCD_AUTH_TOKEN="simple"[root@localhost etcd]# vi etcd.conf#ETCD_PROXY_DIAL_TIMEOUT="1000"#ETCD_PROXY_WRITE_TIMEOUT="5000"#ETCD_PROXY_READ_TIMEOUT="0"##[Security]#ETCD_CERT_FILE=""#ETCD_KEY_FILE=""#ETCD_CLIENT_CERT_AUTH="false"#ETCD_TRUSTED_CA_FILE=""#ETCD_AUTO_TLS="false"#ETCD_PEER_CERT_FILE=""#ETCD_PEER_KEY_FILE=""#ETCD_PEER_CLIENT_CERT_AUTH="false"#ETCD_PEER_TRUSTED_CA_FILE=""#ETCD_PEER_AUTO_TLS="false"##[Logging]#ETCD_DEBUG="false"#ETCD_LOG_PACKAGE_LEVELS=""#ETCD_LOG_OUTPUT="default"##[Unsafe]#ETCD_FORCE_NEW_CLUSTER="false"##[Version]#ETCD_VERSION="false"#ETCD_AUTO_COMPACTION_RETENTION="0"##[Profiling]#ETCD_ENABLE_PPROF="false"#ETCD_METRICS="basic"##[Auth]#ETCD_AUTH_TOKEN="simple"

6）配置ETCD_DATA_DIR目录权限

chown -R etcd:etcd /var/lib/etcd/

2、配置开机启动

1）手动启动服务

systemctl start etcd

2）配置开机启动

systemctl enable etcd