mkdir  -p  /root/etcd
cd  /root/etcd/
wget https://github.com/etcd-io/etcd/releases/download/v3.2.12/etcd-v3.2.12-linux-amd64.tar.gz
tar xf etcd-v3.2.12-linux-amd64.tar.gz
cd etcd-v3.2.12-linux-amd64
cp etcd  etcdctl  /opt/kubernetes/bin/
cat >/opt/kubernetes/cfg/etcd <<EOF
#[Member]
ETCD_NAME="etcd01"
ETCD_DATA_DIR="/var/lib/etcd/default.etcd"
ETCD_LISTEN_PEER_URLS="https://192.168.56.10:2380"
ETCD_LISTEN_CLIENT_URLS="https://192.168.56.10:2379"
#[Clustering]
ETCD_INITIAL_ADVERTISE_PEER_URLS="https://192.168.56.10:2380"
ETCD_ADVERTISE_CLIENT_URLS="https://192.168.56.10:2379"
ETCD_INITIAL_CLUSTER="etcd01=https://192.168.56.10:2380,etcd02=https://192.168.56.11:2380,etcd03=https://192.168.56.12:2380"
ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster"
ETCD_INITIAL_CLUSTER_STATE="new"
EOF
cat >/usr/lib/systemd/system/etcd.service <<EOF
[Unit]
Description=Etcd Server
After=network.target
After=network-online.target
Wants=network-online.target
[Service]
Type=notify
EnvironmentFile=-/opt/kubernetes/cfg/etcd
ExecStart=/opt/kubernetes/bin/etcd \
--name=${ETCD_NAME} \
--data-dir=${ETCD_DATA_DIR} \
--listen-peer-urls=${ETCD_LISTEN_PEER_URLS} \
--listen-client-urls=${ETCD_LISTEN_CLIENT_URLS},http://127.0.0.1:2379 \
--advertise-client-urls=${ETCD_ADVERTISE_CLIENT_URLS} \
--initial-advertise-peer-urls=${ETCD_INITIAL_ADVERTISE_PEER_URLS} \
--initial-cluster=${ETCD_INITIAL_CLUSTER} \
--initial-cluster-token=${ETCD_INITIAL_CLUSTER} \
--initial-cluster-state=new \
--cert-file=/opt/kubernetes/ssl/server.pem \
--key-file=/opt/kubernetes/ssl/server-key.pem \
--peer-cert-file=/opt/kubernetes/ssl/server.pem \
--peer-key-file=/opt/kubernetes/ssl/server-key.pem \
--trusted-ca-file=/opt/kubernetes/ssl/ca.pem \
--peer-trusted-ca-file=/opt/kubernetes/ssl/ca.pem
Restart=on-failure
LimitNOFILE=65536
[Install]
EOF

etcd另外两个节点只需要把配置文件拷过去 ip地址修改下就行

systemctl daemon-reload

systemctl  start  etcd

 /opt/kubernetes/bin/etcdctl  --ca-file=/opt/kubernetes/ssl/ca.pem --cert-file=/opt/kubernetes/ssl/server.pem --key-file=/opt/kubernetes/ssl/server-key.pem  --endpoints="https://192.168.56.10:2379,https://192.168.56.11:2379,https://192.168.56.12:2379"  cluster-health

member 29767d8c58265682 is healthy: got healthy result from https://192.168.56.11:2379

member 619282a432c51a75 is healthy: got healthy result from https://192.168.56.10:2379

member 7c2c22d4a9afce32 is healthy: got healthy result from https://192.168.56.12:2379

cluster is healthy