安裝etcd集羣

目錄

一、etcd01節點生成etcd的證書

二、三個etcd節點安裝etcd

三、etcd01拷貝證書到其他節點

四、開啓集羣etcd

---

GitHub地址：https://github.com/Idiomroot/cluster-etcd.git

節點信息：

etcd01   172.16.3.83

etcd02    172.16.3.90

etcd03    172.16.3.197

一、etcd01節點生成etcd的證書

[root@172-16-3-83 k8s]# mkdir /data/ssl/etcd

[root@172-16-3-83 k8s]# cd /data/ssl/etcd

[root@172-16-3-83 k8s]# vi 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": [
    "172.16.3.83",
    "172.16.3.90",
    "172.16.3.197"
    ],
    "key": {
        "algo": "rsa",
        "size": 2048
    },
    "names": [
        {
            "C": "CN",
            "L": "BeiJing",
            "ST": "BeiJing"
        }
    ]
}
EOF

[root@172-16-3-83 etcd]# sh etcd.sh

[root@172-16-3-83 etcd]# cfssl gencert -initca ca-csr.json | cfssljson -bare ca -

[root@172-16-3-83 etcd]# cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=www server-csr.json | cfssljson -bare server

二、三個etcd節點安裝etcd

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

wget https://github.com/etcd-io/etcd/releases/download/v3.3.10/etcd-v3.3.10-linux-amd64.tar.gz

mkdir  /etc/etcd/

tar xf etcd-v3.3.10-linux-amd64.tar.gz

mv etcd-v3.3.10-linux-amd64/{etcd,etcdctl} /usr/bin/

vi /etc/etcd/etcd

# 3臺機器 ETCD_NAME 名字不一樣 本機IP不一樣

#[Member]

ETCD_NAME="etcd01"

ETCD_DATA_DIR="/var/lib/etcd/default.etcd"

ETCD_LISTEN_PEER_URLS="https://172.16.3.83:2380"

ETCD_LISTEN_CLIENT_URLS="https://172.16.3.83:2379"

#[Clustering]

ETCD_INITIAL_ADVERTISE_PEER_URLS="https://172.16.3.83:2380"

ETCD_ADVERTISE_CLIENT_URLS="https://172.16.3.83:2379"

ETCD_INITIAL_CLUSTER="etcd01=https://172.16.3.83:2380,etcd02=https://172.16.3.90:2380,etcd03=https://172.16.3.197:2380"

ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster"

ETCD_INITIAL_CLUSTER_STATE="new"

注意

* 藍色標註的需要修改

* ETCD_NAME 節點名稱

* ETCD_DATA_DIR 數據目錄

* ETCD_LISTEN_PEER_URLS 集羣通信監聽地址

* ETCD_LISTEN_CLIENT_URLS 客戶端訪問監聽地址

* ETCD_INITIAL_ADVERTISE_PEER_URLS 集羣通告地址

* ETCD_ADVERTISE_CLIENT_URLS 客戶端通告地址

* ETCD_INITIAL_CLUSTER 集羣節點地址

* ETCD_INITIAL_CLUSTER_TOKEN 集羣Token

* ETCD_INITIAL_CLUSTER_STATE 加入集羣的當前狀態，new是新集羣，existing表示加入已有集羣

vi /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= /etc/etcd/etcd

ExecStart=/usr/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=/data/ssl/etcd/server.pem \

--key-file=/data/ssl/etcd/server-key.pem \

--peer-cert-file/data/ssl/etcd/server.pem \

--peer-key-file=/data/ssl/etcd/server-key.pem \

--trusted-ca-file=/data/ssl/etcd/ca.pem \

--peer-trusted-ca-file=/data/ssl/etcd/ssl/ca.pem

Restart=on-failure

LimitNOFILE=65536

[Install]

WantedBy=multi-user.target

設置etcd的api版本

[root@172-16-3-83 ]# export ETCDCTL_API=2

三、etcd01拷貝證書到其他節點

[root@172-16-3-83 ]#scp /data/ssl/etcd/ca*pem [email protected]:/data/ssl/etcd/

[root@172-16-3-83 ]#scp /data/ssl/etcd/ca*pem [email protected]:/data/ssl/etcd/

[root@172-16-3-83 ]#scp /data/ssl/etcd/server*pem [email protected]:/data/ssl/etcd/

[root@172-16-3-83 ]#scp /data/ssl/etcd/server*pem [email protected]:/data/ssl/etcd/

四、開啓集羣etcd

systemctl enable etcd

systemctl start etcd

etcd01查看etcd是否健康

[root@172-16-3-83 ]# etcdctl --ca-file=/data/ssl/etcd/ca.pem --cert-file=/data/ssl/etcd/server.pem --key-file=/data/ssl/etcd/server-key.pem --endpoints="https://172.16.3.83:2379,https://172.16.3.90:2379,https://172.16.3.197:2379" cluster-health

member 435d25f5aa61f16b is healthy: got healthy result from https://172.16.3.90:2379

member 470dcdf2c4c2804f is healthy: got healthy result from https://172.16.3.197:2379

member aafdd75d7f990b4e is healthy: got healthy result from https://172.16.3.83:2379

cluster is healthy

注意，節點遷移的步驟

1）停止待遷移節點上的etc進程；

2）將數據目錄打包複製到新的節點；

3）更新該節點對應集羣中peer url，讓其指向新的節點；

4）使用相同的配置，在新的節點上啓動etcd進程