这篇文章的知识点包括：在根证书服务器上创建基于根证书的config配置文件、创建etcd自签证书签名请求csr的json配置文件和在三台主机上安装etcd服务等方法，阅读完整文相信大家对etcd组件的使用有了一定的认识。
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一、在根证书服务器上创建基于根证书的config配置文件
200 certs]# cd /opt/certs/
200 certs]# vi /opt/certs/ca-config.json
{
"signing": {
"default": {
"expiry": "175200h"
},
"profiles": {
"server": {
"expiry": "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"
]
}
}
}
}
二、创建etcd自签证书签名请求csr的json配置文件
200 certs]# vi etcd-peer-csr.json
{
"CN": "k8s-etcd",
"hosts": [
"10.3.153.212",
"10.3.153.221",
"10.3.153.222"
],
"key": {
"algo": "rsa",
"size": 2048
},
"names": [
{
"C": "CN",
"ST": "beijing",
"L": "beijing",
"O": "od",
"OU": "ops"
}
]
}
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@test-operator certs]# ll | grep etcd-peer
-rw-r--r-- 1 root root 1062 Feb 1 00:19 etcd-peer.csr
-rw-r--r-- 1 root root 375 Feb 1 00:15 etcd-peer-csr.json
-rw------- 1 root root 1675 Feb 1 00:19 etcd-peer-key.pem #证书私钥
-rw-r--r-- 1 root root 1428 Feb 1 00:19 etcd-peer.pem #证书文件
三、分别在三台主机上安装etcd服务
~]# mkdir /opt/src
~]# cd /opt/src/
src]# useradd -s /sbin/nologin -M etcd
src]# id etcd
# 到GitHub下载或者直接用我给得安装包 https://github.com/etcd-io/etcd/tags
src]# tar xf etcd-v3.1.20-linux-amd64.tar.gz -C /opt
opt]# mv etcd-v3.1.20-linux-amd64/ etcd-v3.1.20
opt]# ln -s /opt/etcd-v3.1.20/ /opt/etcd
opt]# cd etcd
~~~
~~~
# 212/221/222机器：
etcd]# mkdir -p /opt/etcd/certs /data/etcd /data/logs/etcd-server
etcd]# cd certs/
certs]# scp 10.3.153.200:/opt/certs/ca.pem .
# 输入200虚机密码
certs]# scp 10.3.153.200:/opt/certs/etcd-peer.pem .
certs]# scp 10.3.153.200:/opt/certs/etcd-peer-key.pem .
certs]# cd ..
etcd]# vi /opt/etcd/etcd-server-startup.sh
# 注意，如果是21机器，这下面得12都得改成21，initial-cluster则是全部机器都有，不需要改，一共5处
#!/bin/sh
./etcd --name etcd-server-7-12 \
--data-dir /data/etcd/etcd-server \
--listen-peer-urls https://10.3.153.212:2380 \
--listen-client-urls https://10.3.153.212:2379,http://127.0.0.1:2379 \
--quota-backend-bytes 8000000000 \
--initial-advertise-peer-urls https://10.3.153.212:2380 \
--advertise-client-urls https://10.4.7.12:2379,http://127.0.0.1:2379 \
--initial-cluster etcd-server-7-12=https://10.3.153.212:2380,etcd-server-7-21=https://10.3.153.221:2380,etcd-server-7-22=https://10.3.153.222:2380 \
--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
etcd]# chmod +x etcd-server-startup.sh
etcd]# chown -R etcd.etcd /opt/etcd-v3.1.20/
etcd]# chown -R etcd.etcd /data/etcd/
etcd]# chown -R etcd.etcd /data/logs/etcd-server/
~~~
~~~
# 212/221/222机器：
etcd]# yum install supervisor -y #用于把服务以后台服务启动
etcd]# systemctl start supervisord
etcd]# systemctl enable supervisord
etcd]# vi /etc/supervisord.d/etcd-server.ini
# 注意修改下面得7-12，对应上机器，如21机器就是7-21，一共一处
[program:etcd-server-7-12]
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)
12 etcd]# supervisorctl update
# out：etcd-server-7-21: added process group
12 etcd]# supervisorctl status
# out: etcd-server-7-12 RUNNING pid 16582, uptime 0:00:59
12 etcd]# netstat -luntp|grep etcd
# 必须是监听了2379和2380这两个端口才算成功
12 etcd]# etcd-server-7-12: added process group
~~~
~~~
# 任意节点检测集群健康状态的两种方法
22 etcd]# ./etcdctl cluster-health
[root@test-nodes1 etcd]# ./etcdctl cluster-health
member 3657c30473e13ab3 is healthy: got healthy result from http://127.0.0.1:2379
member 6cbe98b6a135fd14 is healthy: got healthy result from http://127.0.0.1:2379
member b7ffbb00070336e7 is healthy: got healthy result from http://127.0.0.1:2379
cluster is healthy
22 etcd]# ./etcdctl member list
[root@test-nodes1 etcd]# ./etcdctl member list
3657c30473e13ab3: name=etcd-server-7-12 peerURLs=https://10.3.153.212:2380 clientURLs=http://127.0.0.1:2379,https://10.3.153.212:2379 isLeader=false
6cbe98b6a135fd14: name=etcd-server-7-21 peerURLs=https://10.3.153.221:2380 clientURLs=http://127.0.0.1:2379,https://10.3.153.221:2379 isLeader=false
b7ffbb00070336e7: name=etcd-server-7-22 peerURLs=https://10.3.153.222:2380 clientURLs=http://127.0.0.1:2379,https://10.3.153.222:2379 isLeader=true
以上就是kubernetes集群etcd组件的全方位使用，看完之后是否有所收获呢？如果想了解更多相关内容，欢迎关注创新互联行业资讯！
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