etcd数据安装

1 下载

etcd下载这里选用的是最新版本v3.4.3

2 单机版安装

将下载的etcd文件包进行解压，解压后将etcd、etcdctl二进制文件复制到/usr/bin目录,并给权限执行权限

chmod a+x etcd etcdctl
cp etcd etcdctl /usr/bin/

2.1 设置服务文件etcd.service

在/usr/lib/systemd/system/目录下创建文件etcd.service，内容为：

[Unit]
Description=Etcd Server
After=network.target
After=network-online.target
Wants=network-online.target

[Service]
Type=notify
TimeoutStartSec=10
Restart=on-failure
WorkingDirectory=/var/lib/etcd/
EnvironmentFile=-/etc/etcd/etcd.conf
ExecStart=/usr/bin/etcd
#--name=${ETCD_NAME} \
#--data-dir=${ETCD_DATA_DIR} \
#--listen-client-urls=${ETCD_LISTEN_CLIENT_URLS} \
#--advertise-client-urls=${ETCD_ADVERTISE_CLIENT_URLS}
#--initial-cluster-state=${ETCD_INITIAL_CLUSTER_STATE} \
#--cert-file=${ETCD_CERT_FILE} \
#--key-file=${ETCD_KEY_FILE} \
#--peer-cert-file=${ETCD_PEER_CERT_FILE} \
#--peer-key-file=${ETCD_PEER_KEY_FILE} \
#--trusted-ca-file=${ETCD_TRUSTED_CA_FILE} \
#--client-cert-auth=${ETCD_CLIENT_CERT_AUTH} \
#--peer-client-cert-auth=${ETCD_PEER_CLIENT_CERT_AUTH} \
#--peer-trusted-ca-file=${ETCD_PEER_TRUSTED_CA_FILE}
LimitNOFILE=65535

[Install]
WantedBy=multi-user.target

其中WorkingDirectory为etcd数据库目录，==需要在etcd启动前创建==
集群或使用证书取消相关"#",注意"\"不要多出来或少掉,并修改etcd.conf配置

  mkdir -p /var/lib/etcd

2.2 创建配置文件 etcd.conf

在/etc/etcd/目录下创建文件etcd.conf内容为:

# [member]
ETCD_NAME=ETCD Server
ETCD_DATA_DIR="/var/lib/etcd/default.etcd"
#ETCD_WAL_DIR=""
#ETCD_SNAPSHOT_COUNT="10000"
#ETCD_HEARTBEAT_INTERVAL="100"
#ETCD_ELECTION_TIMEOUT="1000"
#ETCD_LISTEN_PEER_URLS="http://localhost:2380"
ETCD_LISTEN_CLIENT_URLS="http://127.0.0.1:2379"
#ETCD_MAX_SNAPSHOTS="5"
#ETCD_MAX_WALS="5"
#ETCD_CORS=""
#
#[cluster]
#ETCD_INITIAL_ADVERTISE_PEER_URLS="http://localhost:2380"
# if you use different ETCD_NAME (e.g. test), set ETCD_INITIAL_CLUSTER value for this name, i.e. "test=http://..."
#ETCD_INITIAL_CLUSTER="default=http://localhost:2380"
#ETCD_INITIAL_CLUSTER_STATE="new"
#ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster"
ETCD_ADVERTISE_CLIENT_URLS="http://127.0.0.1:2379"
#ETCD_DISCOVERY=""
#ETCD_DISCOVERY_SRV=""
#ETCD_DISCOVERY_FALLBACK="proxy"
#ETCD_DISCOVERY_PROXY=""
#
#[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="/etc/ssl/etcd/etcd.pem"
#ETCD_KEY_FILE="/etc/ssl/etcd/etcd-key.pem"
#ETCD_CLIENT_CERT_AUTH="true"
#ETCD_TRUSTED_CA_FILE="/etc/ssl/etcd/ca/ca.pem"
#ETCD_PEER_CERT_FILE="/etc/ssl/etcd/etcd.pem"
#ETCD_PEER_KEY_FILE="/etc/ssl/etcd/etcd-key.pem"
#ETCD_PEER_CLIENT_CERT_AUTH="true"
#ETCD_PEER_TRUSTED_CA_FILE="/etc/ssl/etcd/ca/ca.pem"
#
#[logging]
#ETCD_DEBUG="false"
# examples for -log-package-levels etcdserver=WARNING,security=DEBUG
#ETCD_LOG_PACKAGE_LEVELS=""

2.3 配置开机启动并运行

systemctl daemon-reload
systemctl enable etcd.service
systemctl start etcd.service

2.4 测试是否安装成功

etcdctl cluster-health  # v3.3.x
etcdctl endpoint health # v3.4.x
etcdctl --endpoints=[192.168.1.12:2379] endpoint health # 外机