centos8 搭建etcd叢集
阿新 • • 發佈：2020-08-04
實驗環境
| hostname | ip |
| bjcy-62 | 172.16.0.62 |
| bjcy-81 | 172.16.0.81 |
| bjcy-82 | 172.16.0.82 |
建立證書
證書伺服器搭建:
建立根證書的config配置檔案
檔案路徑:/opt/certs/ca-config.json
{ "signing": { "default": { "expiry": "175200h" }, "profiles": { "server": { "expiryconfig": "175200h", "usages": [ "signing", "key encipherment", "server auth" ] }, "client": { "expiry": "175200h", "usages": [ "signing","key encipherment", "client auth" ] }, "peer": { "expiry": "175200h", "usages": [ "signing", "key encipherment", "server auth","client auth" ] } } } }
建立etcd申請檔案
[root@djcy-200 certs]# cat /opt/certs/etcd-peer-csr.json
{
"CN": "k8s-etcd",
"hosts": [
"172.16.0.62",
"172.16.0.81",
"172.16.0.82",
"172.16.0.83",
"172.16.0.84"
],
"key": {
"algo": "rsa",
"size": 2048
},
"names": [
{
"C": "CN",
"ST": "Beijing",
"L": "Beijing",
"O": "devops",
"OU": "ops"
}
]
}
授權
[root@djcy-200 certs]# cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json --profile=peer etcd-peer-csr.json [root@djcy-200 certs]# cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json --profile=peer etcd-peer-csr.json | cfssl-json -bare etcd-peer [root@djcy-200 certs]# ll total 36 -rw-r--r-- 1 root root 840 Aug 4 17:46 ca-config.json -rw-r--r-- 1 root root 997 Aug 4 17:45 ca.csr -rw-r--r-- 1 root root 334 Aug 4 17:44 ca-csr.json -rw------- 1 root root 1675 Aug 4 17:45 ca-key.pem -rw-r--r-- 1 root root 1350 Aug 4 17:45 ca.pem -rw-r--r-- 1 root root 1078 Aug 4 17:53 etcd-peer.csr -rw-r--r-- 1 root root 398 Aug 4 17:52 etcd-peer-csr.json -rw------- 1 root root 1675 Aug 4 17:53 etcd-peer-key.pem -rw-r--r-- 1 root root 1444 Aug 4 17:53 etcd-peer.pem
etcd叢集搭建
基礎環境所有機器一致
下載地址:https://github.com/etcd-io/etcd/releases/
建立使用者
[root@djcy-81 ~]# useradd -M -s /sbin/nologin etcd [root@djcy-81 ~]# id etcd uid=1000(etcd) gid=1000(etcd) groups=1000(etcd)
下載軟體
[root@djcy-81 ~]# wget https://github.com/etcd-io/etcd/releases/download/v3.3.23/etcd-v3.3.23-linux-amd64.tar.gz tar xf etcd-v3.3.23-linux-amd64.tar.gz -C /opt/ mv /opt/etcd-v3.3.23-linux-amd64/ /opt/etcd-v3.3.23 ln -s /opt/etcd-v3.3.23 /opt/etcd
建立所需目錄
mkdir -p /opt/etcd/certs /data/etcd/etcd-server /data/logs/etcd-server/ -p
拷貝認證key
[root@djcy-81 certs]# ll total 12 -rw-r--r-- 1 etcd etcd 1350 Aug 4 19:33 ca.pem -rw------- 1 etcd etcd 1675 Aug 4 19:33 etcd-peer-key.pem -rw-r--r-- 1 etcd etcd 1444 Aug 4 19:33 etcd-peer.pem
編寫啟動指令碼
啟動指令碼
[root@djcy-81 etcd]# cat etcd-server-startup.sh
#!/bin/sh
./etcd --name etcd-server-81 \ # 更換實際名稱
--data-dir /data/etcd/etcd-server \
--listen-peer-urls https://172.16.0.81:2380 \ # 更換實際IP
--listen-client-urls https://172.16.0.81:2379,http://127.0.0.1:2379 \ # 更換實際IP
--quota-backend-bytes 8000000000 \
--initial-advertise-peer-urls https://172.16.0.81:2380 \ # 更換實際IP
--advertise-client-urls https://172.16.0.81:2379,http://127.0.0.1:2379 \ # 更換實際IP
--initial-cluster etcd-server-81=https://172.16.0.81:2380,etcd-server-82=https://172.16.0.82:2380,etcd-server-62=https://172.16.0.62:2380 \
--ca-file ./certs/ca.pem \
--cert-file ./certs/etcd-peer.pem \
--key-file ./certs/etcd-peer-key.pem \
--client-cert-auth \
--trusted-ca-file ./certs/ca.pem \
--peer-ca-file ./certs/ca.pem \
--peer-cert-file ./certs/etcd-peer.pem \
--peer-key-file ./certs/etcd-peer-key.pem \
--peer-client-cert-auth \
--peer-trusted-ca-file ./certs/ca.pem \
--log-output stdout
新增許可權
chown -R etcd.etcd /opt/etcd-v3.3.23/ /data/etcd/ /data/logs/etcd-server/
supervisor管理etcd
安裝supervisor
dnf install supervisor -y
啟動並設為開機啟動
systemctl start supervisord.service systemctl enable supervisord.service
配置etcd啟動檔案
[root@djcy-81 ~]# cat /etc/supervisord.d/etcd-server.ini [program:etcd-server] command=/opt/etcd/etcd-server-startup.sh ; the program (relative uses PATH, can take args) numprocs=1 ; number of processes copies to start (def 1) directory=/opt/etcd ; directory to cwd to before exec (def no cwd) autostart=true ; start at supervisord start (default: true) autorestart=true ; retstart at unexpected quit (default: true) startsecs=30 ; number of secs prog must stay running (def. 1) startretries=3 ; max # of serial start failures (default 3) exitcodes=0,2 ; 'expected' exit codes for process (default 0,2) stopsignal=QUIT ; signal used to kill process (default TERM) stopwaitsecs=10 ; max num secs to wait b4 SIGKILL (default 10) user=etcd ; setuid to this UNIX account to run the program redirect_stderr=true ; redirect proc stderr to stdout (default false) stdout_logfile=/data/logs/etcd-server/etcd.stdout.log ; stdout log path, NONE for none; default AUTO stdout_logfile_maxbytes=64MB ; max # logfile bytes b4 rotation (default 50MB) stdout_logfile_backups=4 ; # of stdout logfile backups (default 10) stdout_capture_maxbytes=1MB ; number of bytes in 'capturemode' (default 0) stdout_events_enabled=false ; emit events on stdout writes (default false)
啟動
supervisorctl reload supervisorctl up supervisorctl status
驗證叢集
ln -s etcdctl /usr/bin/ [root@bjcy-81 etcd]# pwd /opt/etcd [root@bjcy-81 etcd]# ./etcdctl cluster-health member 59947c46adf706a9 is healthy: got healthy result from http://127.0.0.1:2379 member 6413ab1ba568b3ed is healthy: got healthy result from http://127.0.0.1:2379 member 742bb1a2c426596e is healthy: got healthy result from http://127.0.0.1:2379 cluster is healthy [root@bjcy-81 etcd]# ./etcdctl member list 59947c46adf706a9: name=etcd-server-82 peerURLs=https://172.16.0.82:2380 clientURLs=http://127.0.0.1:2379,https://172.16.0.82:2379 isLeader=true 6413ab1ba568b3ed: name=etcd-server-62 peerURLs=https://172.16.0.62:2380 clientURLs=http://127.0.0.1:2379,https://172.16.0.62:2379 isLeader=false 742bb1a2c426596e: name=etcd-server-81 peerURLs=https://172.16.0.81:2380 clientURLs=http://127.0.0.1:2379,https://172.16.0.81:2379 isLeader=false