kubernetes 部署--创建 etcd 集群（非TLS）⑤

安装 etcd

yum install etcd

接下来，修改 systemd 将会使用的环境文件（master1、master2、master3分别配置）：

export PEER_NAME=$(hostname)
export PRIVATE_IP=$(ip addr show ens160 | grep -Po 'inet \K[\d.]+')

cat > /etc/etcd/etcd.conf <<EOL
#[Member]
ETCD_NAME="${PEER_NAME}"
ETCD_DATA_DIR="/var/lib/etcd/default.etcd"
ETCD_LISTEN_PEER_URLS="http://${PRIVATE_IP}:2380"
ETCD_LISTEN_CLIENT_URLS="http://127.0.0.1:2379,http://${PRIVATE_IP}:2379"
#[Clustering]
ETCD_INITIAL_ADVERTISE_PEER_URLS="http://${PRIVATE_IP}:2380"
ETCD_ADVERTISE_CLIENT_URLS="http://${PRIVATE_IP}:2379"
ETCD_INITIAL_CLUSTER="master1=http://192.168.22.101:2380,master2=http://192.168.22.102:2380,master3=http://192.168.22.103:2380"
ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster"
ETCD_INITIAL_CLUSTER_STATE="new"
EOL

请确保用恰当的 ETCD_INITIAL_CLUSTER 地址： hostname0=<etcd0-ip-address>、 hostname1=<etcd1-ip-address> 和 hostname2=<etcd2-ip-address>。

现在复制 systemd unit 文件，如下所示：

vim /lib/systemd/system/etcd.service
[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=\"${ETCD_DATA_DIR}\" \
                    --listen-peer-urls=\"${ETCD_LISTEN_PEER_URLS}\" \
                    --listen-client-urls=\"${ETCD_LISTEN_CLIENT_URLS}\" \
                    --advertise-client-urls=\"${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

同步etcd.service到master2和master3

scp /lib/systemd/system/etcd.service master2:/lib/systemd/system/etcd.service
scp /lib/systemd/system/etcd.service master3:/lib/systemd/system/etcd.service

最后，像这样启动 etcd:

systemctl daemon-reload
systemctl enable etcd
systemctl start etcd

检查它是否成功启动：

systemctl status etcd

服务检查

etcdctl  cluster-health
member 97404dcac5bcbe95 is healthy: got healthy result from http://192.168.22.101:2379
member f1e382a69d83f82b is healthy: got healthy result from http://192.168.22.102:2379
member f460473152666b51 is healthy: got healthy result from http://192.168.22.103:2379
cluster is healthy