四、etcd数据库集群部署

1、下载安装
二进制下载：
https://github.com/coreos/etcd/releases/download/v3.3.13/etcd-v3.3.13-linux-amd64.tar.gz

 1 [[email protected] ~]# tar xf etcd-v3.3.13-linux-amd64.tar.gz
 2 [[email protected] ~]# cd etcd-v3.3.13-linux-amd64
 3 [[email protected] etcd-v3.3.13-linux-amd64]# ll
 4 总用量 29776
 5 drwxr-xr-x 10 1000 1000 4096 5月 3 2019 Documentation
 6 -rwxr-xr-x 1 1000 1000 16927136 5月 3 2019 etcd
 7 -rwxr-xr-x 1 1000 1000 13498880 5月 3 2019 etcdctl
 8 -rw-r--r-- 1 1000 1000 38864 5月 3 2019 README-etcdctl.md
 9 -rw-r--r-- 1 1000 1000 7262 5月 3 2019 README.md
10 -rw-r--r-- 1 1000 1000 7855 5月 3 2019 READMEv2-etcdctl.md

只有etcd,etcdctl两个文件有用

2、安装etcd

 1 #创建etcd所需要的目录
 2 [[email protected] opt]# mkdir -p etcd/{bin,cfg,ssl}
 3 #拷贝下载下来的可执行命令
 4 [[email protected] ~]# cp etcd-v3.3.13-linux-amd64/{etcd,etcdctl} /opt/etcd/bin/
 5 #拷贝我们生成的自签证书
 6 [[email protected] ~]# cp k8s/tls/etcd/{server,server-key,ca}.pem /opt/etcd/ssl/
 7 [[email protected] ~]# tree /opt/etcd
 8 /opt/etcd
 9 ├── bin
10 │   ├── etcd
11 │   └── etcdctl
12 ├── cfg
13 └── ssl
14     ├── ca.pem
15     ├── server-key.pem
16     └── server.pem

3、生成启动和配置文件
#配置文件

 1 [[email protected] ~]# cat /opt/etcd/cfg/etcd.conf
 2
 3 #[Member]
 4 ETCD_NAME="etcd-1"
 5 ETCD_DATA_DIR="/var/lib/etcd/default.etcd"
 6 ETCD_LISTEN_PEER_URLS="https://etcd01:2380"
 7 ETCD_LISTEN_CLIENT_URLS="https://etcd01:2379"
 8
 9 #[Clustering]
10 ETCD_INITIAL_ADVERTISE_PEER_URLS="https://etcd01:2380"
11 ETCD_ADVERTISE_CLIENT_URLS="https://etcd01:2379"
12 ETCD_INITIAL_CLUSTER="etcd-1=https://etcd01:2380,etcd-2=https://etcd02:2380,etcd-3=https://etcd03:2380"
13 ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster"
14 ETCD_INITIAL_CLUSTER_STATE="new"

#启动文件

 1 [[email protected] etcd]# cat /opt/etcd/etcd.service
 2 [Unit]
 3 Description=Etcd Server
 4 After=network.target
 5 After=network-online.target
 6 Wants=network-online.target
 7
 8 [Service]
 9 Type=notify
10 EnvironmentFile=/opt/etcd/cfg/etcd.conf
11 ExecStart=/opt/etcd/bin/etcd 12         --name=${ETCD_NAME} 13         --data-dir=${ETCD_DATA_DIR} 14         --listen-peer-urls=${ETCD_LISTEN_PEER_URLS} 15         --listen-client-urls=${ETCD_LISTEN_CLIENT_URLS},http://127.0.0.1:2379 \
16         --advertise-client-urls=${ETCD_ADVERTISE_CLIENT_URLS} 17         --initial-advertise-peer-urls=${ETCD_INITIAL_ADVERTISE_PEER_URLS} 18         --initial-cluster=${ETCD_INITIAL_CLUSTER} 19         --initial-cluster-token=${ETCD_INITIAL_CLUSTER_TOKEN} 20         --initial-cluster-state=new 21         --cert-file=/opt/etcd/ssl/server.pem 22         --key-file=/opt/etcd/ssl/server-key.pem 23         --peer-cert-file=/opt/etcd/ssl/server.pem 24         --peer-key-file=/opt/etcd/ssl/server-key.pem 25         --trusted-ca-file=/opt/etcd/ssl/ca.pem 26         --peer-trusted-ca-file=/opt/etcd/ssl/ca.pem
27 Restart=on-failure
28 LimitNOFILE=65536
29
30 [Install]
31 WantedBy=multi-user.target

4、拷贝etcd目录到etcd01，etcd02，etcd03机器上

1 [[email protected] ~]# scp -r /opt/etcd/ etcd01:/opt/
2 [[email protected] ~]# scp -r /opt/etcd/ etcd02:/opt/
3 [[email protected] ~]# scp -r /opt/etcd/ etcd03:/opt/

5、分别修改3台etcd的cfg/etcd.conf文件，IP为自己的IP
#etcd01

[[email protected] ~]# cat /opt/etcd/cfg/etcd.conf 

#[Member]
ETCD_NAME="etcd-1"
ETCD_DATA_DIR="/var/lib/etcd/default.etcd"
ETCD_LISTEN_PEER_URLS="https://10.16.8.161:2380"
ETCD_LISTEN_CLIENT_URLS="https://10.16.8.161:2379"

#[Clustering]
ETCD_INITIAL_ADVERTISE_PEER_URLS="https://10.16.8.161:2380"
ETCD_ADVERTISE_CLIENT_URLS="https://10.16.8.161:2379"
ETCD_INITIAL_CLUSTER="etcd-1=https://10.16.8.161:2380,etcd-2=https://10.16.8.162:2380,etcd-3=https://10.16.8.163:2380"
ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster"
ETCD_INITIAL_CLUSTER_STATE="new"

#etcd02

#[Member]
ETCD_NAME="etcd-2"
ETCD_DATA_DIR="/var/lib/etcd/default.etcd"
ETCD_LISTEN_PEER_URLS="https://10.16.8.162:2380"
ETCD_LISTEN_CLIENT_URLS="https://10.16.8.162:2379"

#[Clustering]
ETCD_INITIAL_ADVERTISE_PEER_URLS="https://10.16.8.162:2380"
ETCD_ADVERTISE_CLIENT_URLS="https://10.16.8.162:2379"
ETCD_INITIAL_CLUSTER="etcd-1=https://10.16.8.161:2380,etcd-2=https://10.16.8.162:2380,etcd-3=https://10.16.8.163:2380"
ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster"
ETCD_INITIAL_CLUSTER_STATE="new"

#etcd03

[[email protected] ~]# cat /opt/etcd/cfg/etcd.conf

#[Member]
ETCD_NAME="etcd-3"
ETCD_DATA_DIR="/var/lib/etcd/default.etcd"
ETCD_LISTEN_PEER_URLS="https://10.16.8.163:2380"
ETCD_LISTEN_CLIENT_URLS="https://10.16.8.163:2379"

#[Clustering]
ETCD_INITIAL_ADVERTISE_PEER_URLS="https://10.16.8.163:2380"
ETCD_ADVERTISE_CLIENT_URLS="https://10.16.8.163:2379"
ETCD_INITIAL_CLUSTER="etcd-1=https://10.16.8.161:2380,etcd-2=https://10.16.8.162:2380,etcd-3=https://10.16.8.163:2380"
ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster"
ETCD_INITIAL_CLUSTER_STATE="new"

6、3台etcd机器上分别拷贝etcd.service到/usr/lib/systemd/system

[[email protected] ~]# mv /opt/etcd/etcd.service /usr/lib/systemd/system
[[email protected] ~]# mv /opt/etcd/etcd.service /usr/lib/systemd/system
[[email protected] ~]# mv /opt/etcd/etcd.service /usr/lib/systemd/system

7、启动和开机启动etcd

[[email protected] ~]# systemctl daemon-reload
[[email protected] ~]# systemctl start etcd
[[email protected] ~]# systemctl enable etcd

8、查看集群状态

[[email protected] ~]# /opt/etcd/bin/etcdctl  --ca-file=/opt/etcd/ssl/ca.pem --cert-file=/opt/etcd/ssl/server.pem --key-file=/opt/etcd/ssl/server-key.pem  --endpoints="https://10.16.8.161:2379,https://10.16.8.162:2379,https://10.16.8.163:2379"  cluster-health

member 592bed4fa345de89 is healthy: got healthy result from https://10.16.8.163:2379
member 7fc93466fcfffccf is healthy: got healthy result from https://10.16.8.162:2379
member d83d38380a38f404 is healthy: got healthy result from https://10.16.8.161:2379
cluster is healthy

原文地址：https://www.cnblogs.com/xw115428/p/11955946.html