etcd集群部署

一、规划

二、生成证书

2.1 安装证书生成工具cfssl

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

2.2 生成etcd证书

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


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


##	生成证书(会生产ca.pem和ca-key.pem):
# cfssl gencert -initca ca-csr.json | cfssljson -bare ca -



##签发ca证书、
# cat server-csr.json 
{
  "CN": "etcd",
  "hosts": [
    "192.168.8.115",
    "192.168.8.116",
    "192.168.8.117"
  ],
  "key": {
    "algo": "rsa",
    "size": 2048
  },
  "names": [
    {
      "C": "CN",
      "L": "Beijing",
      "ST": "Beijing"
    }
  ]
}

三、etcd部署

 3.1 下载地址

https://github.com/etcd-io/etcd/releases/tag/v3.6.0-rc.0

3.2 解压

# mkdir {cfg,ssl,data}

3.3 修改配置文件

Pro-etcd-1:8.115

# cat cfg/etcd.conf 
#[Member]
ETCD_NAME="pro-etcd-1"
ETCD_DATA_DIR="/work/etcd/data/default.etcd"
ETCD_LISTEN_PEER_URLS="https://192.168.8.115:2380"
ETCD_LISTEN_CLIENT_URLS="https://192.168.8.115:2379"

#[Clustering]
ETCD_INITIAL_ADVERTISE_PEER_URLS="https://192.168.8.115:2380"
ETCD_ADVERTISE_CLIENT_URLS="https://192.168.8.115:2379"
ETCD_INITIAL_CLUSTER="pro-etcd-1=https://192.168.8.115:2380,pro-etcd-2=https://192.168.8.116:2380,pro-etcd-3=https://192.168.8.117:2380"
ETCD_INITIAL_CLUSTER_TOKEN="pro-etcd-cluster"
ETCD_INITIAL_CLUSTER_STATE="new"



Pro-etcd-2:8.116

# cat cfg/etcd.conf 
#[Member]
ETCD_NAME="pro-etcd-2"
ETCD_DATA_DIR="/work/etcd/data/default.etcd"
ETCD_LISTEN_PEER_URLS="https://192.168.8.116:2380"
ETCD_LISTEN_CLIENT_URLS="https://192.168.8.116:2379"

#[Clustering]
ETCD_INITIAL_ADVERTISE_PEER_URLS="https://192.168.8.116:2380"
ETCD_ADVERTISE_CLIENT_URLS="https://192.168.8.116:2379"
ETCD_INITIAL_CLUSTER="pro-etcd-1=https://192.168.8.115:2380,pro-etcd-2=https://192.168.8.116:2380,pro-etcd-3=https://192.168.8.117:2380"
ETCD_INITIAL_CLUSTER_TOKEN="pro-etcd-cluster"
ETCD_INITIAL_CLUSTER_STATE="new"



Pro-etcd-3:8.117
# cat cfg/etcd.conf 
#[Member]
ETCD_NAME="pro-etcd-3"
ETCD_DATA_DIR="/work/etcd/data/default.etcd"
ETCD_LISTEN_PEER_URLS="https://192.168.8.117:2380"
ETCD_LISTEN_CLIENT_URLS="https://192.168.8.117:2379"

#[Clustering]
ETCD_INITIAL_ADVERTISE_PEER_URLS="https://192.168.8.117:2380"
ETCD_ADVERTISE_CLIENT_URLS="https://192.168.8.117:2379"
ETCD_INITIAL_CLUSTER="pro-etcd-1=https://192.168.8.115:2380,pro-etcd-2=https://192.168.8.116:2380,pro-etcd-3=https://192.168.8.117:2380"
ETCD_INITIAL_CLUSTER_TOKEN="pro-etcd-cluster"
ETCD_INITIAL_CLUSTER_STATE="new"

3.4 拷贝证书

# cp ~/TLS/etcd/*.pem ./ssl/

3.5 启动服务配置

# cat /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=/work/etcd/cfg/etcd.conf
ExecStart=/work/etcd/etcd \
--cert-file=/work/etcd/ssl/server.pem \
--key-file=/work/etcd/ssl/server-key.pem \
--peer-cert-file=/work/etcd/ssl/server.pem \
--peer-key-file=/work/etcd/ssl/server-key.pem \
--trusted-ca-file=/work/etcd/ssl/ca.pem \
--peer-trusted-ca-file=/work/etcd/ssl/ca.pem \
--logger=zap
Restart=on-failure
LimitNOFILE=65536

[Install]
WantedBy=multi-user.target

3.6 防火墙配置

# firewall-cmd --permanent --zone=public --add-port=2380/tcp
# firewall-cmd --permanent --zone=public --add-port=2379/tcp
# firewall-cmd --reload

3.7 启动

# systemctl start etcd
# systemctl status etcd
# systemctl enable etcd

四、测试

# ETCDCTL_API=3 /work/etcd/etcdctl  --cacert=/work/etcd/ssl/ca.pem --cert=/work/etcd/ssl/server.pem --key=/work/etcd/ssl/server-key.pem --endpoints="https://192.168.8.115:2379,https://192.168.8.116:2379,https://192.168.8.117:2379" endpoint health --write-out=table