2etcd.sh

#!/bin/bash

#ETCD_IP=172.17.0.41

wget https://github.com/etcd-io/etcd/releases/download/v3.2.12/etcd-v3.2.12-linux-amd64.tar.gz
tar zxvf etcd-v3.2.12-linux-amd64.tar.gz
mv etcd-v3.2.12-linux-amd64/{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://ETCD_IP:2380"
ETCD_LISTEN_CLIENT_URLS="https://ETCD_IP:2379"

#[Clustering]
ETCD_INITIAL_ADVERTISE_PEER_URLS="https://ETCD_IP:2380"
ETCD_ADVERTISE_CLIENT_URLS="https://ETCD_IP:2379"
ETCD_INITIAL_CLUSTER="etcd01=https://ETCD_IP:2380"
ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster"
ETCD_INITIAL_CLUSTER_STATE="new"
EOF

mkdir /usr/lib/systemd/system/

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_TOKEN} \
--initial-cluster-state=new \
--cert-file=/opt/kubernetes/ssl/etcd.pem \
--key-file=/opt/kubernetes/ssl/etcd-key.pem \
--peer-cert-file=/opt/kubernetes/ssl/etcd.pem \
--peer-key-file=/opt/kubernetes/ssl/etcd-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]
WantedBy=multi-user.target
EOF

systemctl daemon-reload
systemctl enable etcd
systemctl start etcd

/opt/kubernetes/bin/etcdctl \
--ca-file=/opt/kubernetes/ssl/ca.pem --cert-file=/opt/kubernetes/ssl/etcd.pem --key-file=/opt/kubernetes/ssl/etcd-key.pem \
--endpoints="https://ETCD_IP:2379" \
cluster-health