006.Kubernetes二进制部署ETCD

  1 etcd 是基于 Raft 的分布式 key-value 存储系统，由 CoreOS 开发，常用于服务发现、共享配置以及并发控制（如 leader 选举、分布式锁等）。kubernetes 使用 etcd 存储所有运行数据。
  2 [root@k8smaster01 ~]# cd /opt/k8s/work
  3 [root@k8smaster01 work]# wget https://github.com/coreos/etcd/releases/download/v3.3.13/etcd-v3.3.13-linux-amd64.tar.gz
  4 [root@k8smaster01 work]# tar -xvf etcd-v3.3.13-linux-amd64.tar.gz

  1 [root@k8smaster01 ~]# cd /opt/k8s/work
  2 [root@k8smaster01 work]# source /opt/k8s/bin/environment.sh
  3 [root@k8smaster01 work]# for master_ip in ${MASTER_IPS[@]}
  4   do
  5     echo ">>> ${master_ip}"
  6     scp etcd-v3.3.13-linux-amd64/etcd* root@${master_ip}:/opt/k8s/bin
  7     ssh root@${master_ip} "chmod +x /opt/k8s/bin/*"
  8   done

  1 [root@k8smaster01 ~]# cd /opt/k8s/work
  2 [root@k8smaster01 work]# cat > etcd-csr.json <<EOF
  3 {
  4     "CN": "etcd",
  5     "hosts": [
  6     "127.0.0.1",
  7     "172.24.8.71",
  8     "172.24.8.72",
  9     "172.24.8.73"
 10   ],
 11     "key": {
 12         "algo": "rsa",
 13         "size": 2048
 14     },
 15     "names": [
 16         {
 17             "C": "CN",
 18             "ST": "Shanghai",
 19             "L": "Shanghai",
 20             "O": "k8s",
 21             "OU": "System"
 22         }
 23     ]
 24 }
 25 EOF
 26 #创建etcd的CA证书请求文件

  1 [root@k8smaster01 ~]# cd /opt/k8s/work
  2 [root@k8smaster01 work]# cfssl gencert -ca=/opt/k8s/work/ca.pem   3 -ca-key=/opt/k8s/work/ca-key.pem -config=/opt/k8s/work/ca-config.json   4 -profile=kubernetes etcd-csr.json | cfssljson -bare etcd	#生成CA密钥（ca-key.pem）和证书（ca.pem）

  1 [root@k8smaster01 ~]# cd /opt/k8s/work
  2 [root@k8smaster01 work]# source /opt/k8s/bin/environment.sh
  3 [root@k8smaster01 work]# for master_ip in ${MASTER_IPS[@]}
  4   do
  5     echo ">>> ${master_ip}"
  6     ssh root@${master_ip} "mkdir -p /etc/etcd/cert"
  7     scp etcd*.pem root@${master_ip}:/etc/etcd/cert/
  8   done

  1 [root@k8smaster01 ~]# cd /opt/k8s/work
  2 [root@k8smaster01 work]# source /opt/k8s/bin/environment.sh
  3 [root@k8smaster01 work]# cat > etcd.service.template <<EOF
  4 [Unit]
  5 Description=Etcd Server
  6 After=network.target
  7 After=network-online.target
  8 Wants=network-online.target
  9 Documentation=https://github.com/coreos
 10 
 11 [Service]
 12 Type=notify
 13 WorkingDirectory=${ETCD_DATA_DIR}
 14 ExecStart=/opt/k8s/bin/etcd \ 15   --data-dir=${ETCD_DATA_DIR} \ 16   --wal-dir=${ETCD_WAL_DIR} \ 17   --name=##MASTER_NAME## \ 18   --cert-file=/etc/etcd/cert/etcd.pem \ 19   --key-file=/etc/etcd/cert/etcd-key.pem \ 20   --trusted-ca-file=/etc/kubernetes/cert/ca.pem \ 21   --peer-cert-file=/etc/etcd/cert/etcd.pem \ 22   --peer-key-file=/etc/etcd/cert/etcd-key.pem \ 23   --peer-trusted-ca-file=/etc/kubernetes/cert/ca.pem \ 24   --peer-client-cert-auth \ 25   --client-cert-auth \ 26   --listen-peer-urls=https://##MASTER_IP##:2380 \\
 27   --initial-advertise-peer-urls=https://##MASTER_IP##:2380 \\
 28   --listen-client-urls=https://##MASTER_IP##:2379,http://127.0.0.1:2379 \\
 29   --advertise-client-urls=https://##MASTER_IP##:2379 \\
 30   --initial-cluster-token=etcd-cluster-0 \ 31   --initial-cluster=${ETCD_NODES} \ 32   --initial-cluster-state=new \ 33   --auto-compaction-mode=periodic \ 34   --auto-compaction-retention=1 \ 35   --max-request-bytes=33554432 \ 36   --quota-backend-bytes=6442450944 \ 37   --heartbeat-interval=250 \ 38   --election-timeout=2000
 39 Restart=on-failure
 40 RestartSec=5
 41 LimitNOFILE=65536
 42 
 43 [Install]
 44 WantedBy=multi-user.target
 45 EOF

  1 [root@k8smaster01 ~]# cd /opt/k8s/work
  2 [root@k8smaster01 work]# source /opt/k8s/bin/environment.sh
  3 [root@k8smaster01 work]# for (( i=0; i < 3; i++ ))
  4   do
  5     sed -e "s/##MASTER_NAME##/${MASTER_NAMES[i]}/" -e "s/##MASTER_IP##/${MASTER_IPS[i]}/" etcd.service.template > etcd-${MASTER_IPS[i]}.service
  6   done

  1 [root@k8smaster01 ~]# cd /opt/k8s/work
  2 [root@k8smaster01 work]# source /opt/k8s/bin/environment.sh
  3 [root@k8smaster01 work]# for master_ip in ${MASTER_IPS[@]}
  4   do
  5     echo ">>> ${master_ip}"
  6     scp etcd-${master_ip}.service root@${master_ip}:/etc/systemd/system/etcd.service
  7   done

  1 [root@k8smaster01 ~]# cd /opt/k8s/work
  2 [root@k8smaster01 work]# source /opt/k8s/bin/environment.sh
  3 [root@k8smaster01 work]# for master_ip in ${MASTER_IPS[@]}
  4   do
  5     echo ">>> ${master_ip}"
  6     ssh root@${master_ip} "mkdir -p ${ETCD_DATA_DIR} ${ETCD_WAL_DIR}"
  7     ssh root@${master_ip} "systemctl daemon-reload && systemctl enable etcd && systemctl restart etcd " &
  8   done

  1 [root@k8smaster01 ~]# cd /opt/k8s/work
  2 [root@k8smaster01 work]# source /opt/k8s/bin/environment.sh
  3 [root@k8smaster01 work]# for master_ip in ${MASTER_IPS[@]}
  4   do
  5     echo ">>> ${master_ip}"
  6     ssh root@${master_ip} "systemctl status etcd|grep Active"
  7   done

  1 [root@k8smaster01 ~]# cd /opt/k8s/work
  2 [root@k8smaster01 work]# source /opt/k8s/bin/environment.sh
  3 [root@k8smaster01 work]# for master_ip in ${MASTER_IPS[@]}
  4   do
  5     echo ">>> ${master_ip}"
  6     ETCDCTL_API=3 /opt/k8s/bin/etcdctl   7     --endpoints=https://${master_ip}:2379 \
  8     --cacert=/etc/kubernetes/cert/ca.pem   9     --cert=/etc/etcd/cert/etcd.pem  10     --key=/etc/etcd/cert/etcd-key.pem endpoint health
 11   done

  1 [root@k8smaster01 ~]# source /opt/k8s/bin/environment.sh
  2 [root@k8smaster01 ~]# ETCDCTL_API=3 /opt/k8s/bin/etcdctl   3   -w table --cacert=/etc/kubernetes/cert/ca.pem   4   --cert=/etc/etcd/cert/etcd.pem   5   --key=/etc/etcd/cert/etcd-key.pem   6   --endpoints=${ETCD_ENDPOINTS} endpoint status