etcd

安装证书生成工具cfssl：

mkdir /data/ssl -p

cd /data/
wget https://pkg.cfssl.org/R1.2/cfssl_linux-amd64
wget https://pkg.cfssl.org/R1.2/cfssljson_linux-amd64
wget https://pkg.cfssl.org/R1.2/cfssl-certinfo_linux-amd64

chmod +x cfssl_linux-amd64 cfssljson_linux-amd64 cfssl-certinfo_linux-amd64

mv cfssl_linux-amd64 /usr/local/bin/cfssl
mv cfssljson_linux-amd64 /usr/local/bin/cfssljson
mv cfssl-certinfo_linux-amd64 /usr/bin/cfssl-certinfo

cd /data/ssl/

二进制包下载地址：https://github.com/etcd-io/etcd/releases/tag/v3.3.10
下载 etcd-v3.3.10-linux-amd64.tar.gz

生成key

mkdir /data/ssl/etcd
cd /data/ssl/etcd

vim etcd.sh
# etcd
# cat ca-config.json
cat > ca-config.json <<EOF
{
  "signing": {
    "default": {
      "expiry": "87600h"
    },
    "profiles": {
      "www": {
         "expiry": "87600h",
         "usages": [
            "signing",
            "key encipherment",
            "server auth",
            "client auth"
        ]
      }
    }
  }
}
EOF

# cat ca-csr.json
cat > ca-csr.json <<EOF
{
    "CN": "etcd CA",
    "key": {
        "algo": "rsa",
        "size": 2048
    },
    "names": [
        {
            "C": "CN",
            "L": "Beijing",
            "ST": "Beijing"
        }
    ]
}
EOF

# cat server-csr.json
cat > server-csr.json <<EOF
{
    "CN": "etcd",
    "hosts": [
    "192.168.100.100",
    "192.168.100.101",
    "192.168.100.102"
    ],
    "key": {
        "algo": "rsa",
        "size": 2048
    },
    "names": [
        {
            "C": "CN",
            "L": "BeiJing",
            "ST": "BeiJing"
        }
    ]
}
EOF

sh etcd.sh

cfssl gencert -initca ca-csr.json | cfssljson -bare ca -
cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=www server-csr.json | cfssljson -bare server

# ls *pem
ca-key.pem  ca.pem  server-key.pem  server.pem

部署

3个节点 都操作

mkdir /data/src/
cd /data/src/

mkdir /opt/etcd/{bin,cfg,ssl} -p
tar xf etcd-v3.3.10-linux-amd64.tar.gz
mv etcd-v3.3.10-linux-amd64/{etcd,etcdctl} /opt/etcd/bin/

vim /opt/etcd/cfg/etcd   
# 3台机器 ETCD_NAME 名字不一样  本机IP不一样 
#[Member]
ETCD_NAME="etcd01"
ETCD_DATA_DIR="/var/lib/etcd/default.etcd"
ETCD_LISTEN_PEER_URLS="https://192.168.100.100:2380"
ETCD_LISTEN_CLIENT_URLS="https://192.168.100.100:2379"

#[Clustering]
ETCD_INITIAL_ADVERTISE_PEER_URLS="https://192.168.100.100:2380"
ETCD_ADVERTISE_CLIENT_URLS="https://192.168.100.100:2379"
ETCD_INITIAL_CLUSTER="etcd01=https://192.168.100.100:2380,etcd02=https://192.168.100.101:2380,etcd03=https://192.168.100.102:2380"
ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster"
ETCD_INITIAL_CLUSTER_STATE="new"

* ETCD_NAME 节点名称
* ETCD_DATA_DIR 数据目录
* ETCD_LISTEN_PEER_URLS 集群通信监听地址
* ETCD_LISTEN_CLIENT_URLS 客户端访问监听地址
* ETCD_INITIAL_ADVERTISE_PEER_URLS 集群通告地址
* ETCD_ADVERTISE_CLIENT_URLS 客户端通告地址
* ETCD_INITIAL_CLUSTER 集群节点地址
* ETCD_INITIAL_CLUSTER_TOKEN 集群Token
* ETCD_INITIAL_CLUSTER_STATE 加入集群的当前状态，new是新集群，existing表示加入已有集群

vim   /usr/lib/systemd/system/etcd.service
[Unit]
Description=Etcd Server
After=network.target
After=network-online.target
Wants=network-online.target

[Service]
Type=notify
EnvironmentFile=/opt/etcd/cfg/etcd
ExecStart=/opt/etcd/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/etcd/ssl/server.pem 
--key-file=/opt/etcd/ssl/server-key.pem 
--peer-cert-file=/opt/etcd/ssl/server.pem 
--peer-key-file=/opt/etcd/ssl/server-key.pem 
--trusted-ca-file=/opt/etcd/ssl/ca.pem 
--peer-trusted-ca-file=/opt/etcd/ssl/ca.pem
Restart=on-failure
LimitNOFILE=65536

[Install]
WantedBy=multi-user.target

cp /data/ssl/etcd/ca*pem  /opt/etcd/ssl/
cp /data/ssl/etcd/server*pem  /opt/etcd/ssl/

scp  /data/ssl/etcd/ca*pem  root@node01:/opt/etcd/ssl/
scp  /data/ssl/etcd/ca*pem  root@node02:/opt/etcd/ssl/
scp  /data/ssl/etcd/server*pem  root@node01:/opt/etcd/ssl/
scp  /data/ssl/etcd/server*pem  root@node02:/opt/etcd/ssl/

## 最后再启动
systemctl enable etcd
systemctl start etcd

检查

查看集群状态：  
cd /data/ssl/etcd/
/opt/etcd/bin/etcdctl --ca-file=ca.pem --cert-file=server.pem --key-file=server-key.pem --endpoints="https://192.168.100.100:2379,https://192.168.100.101:2379,https://192.168.100.102:2379" cluster-health
member 65f49728d3d54972 is healthy: got healthy result from https://192.168.100.100:2379
member d94ba21c17c75ffb is healthy: got healthy result from https://192.168.100.101:2379
member dc51f874259f7894 is healthy: got healthy result from https://192.168.100.102:2379
cluster is healthy