安装etcd

1、仓库14上对etcd签发证书

vim /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"
                ]
            }
        }
    }
} 

vim /opt/certs/etcd-peer-csr.json
{
    "CN": "k8s-etcd",
    "hosts": [
        "10.4.7.10",
        "10.4.7.11",
        "10.4.7.12",
        "10.4.7.13"
    ],
    "key": {
        "algo": "rsa",
        "size": 2048
    },
    "names": [
        {
            "C": "CN",
            "ST": "beijing",
            "L": "beijing",
            "O": "k8s",
            "OU": "system"
        }
    ]
}

cd /opt/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

2、10.4.7.11上创建etcd用户

useradd -s /sbin/nologin -M etcd

3、github上复制下载地址下载etcd，https://github.com/etcd-io/etcd/releases

wget https://github.com/etcd-io/etcd/releases/download/v3.4.7/etcd-v3.4.7-linux-amd64.tar.gz
tar zxvf etcd-v3.4.7-linux-amd64.tar.gz -C /opt
mv etcd-v3.4.7-linux-amd64/ etcd-v3.4.7
ln -s /opt/etcd-v3.4.7 /opt/etcd
mkdir -p /opt/etcd/certs /data/etcd /data/logs/etcd-server
cd /opt/etcd/certs
scp root@10.4.7.14:/opt/certs/ca.pem ./ 
scp root@10.4.7.14:/opt/certs/etcd-peer.pem ./
scp root@10.4.7.14:/opt/certs/etcd-peer-key.pem ./
vim etcd-server-startup.sh
#!/bin/sh
./etcd --name etcd-server-7-11 \
       --data-dir /data/etcd/etcd-server \
       --listen-peer-urls https://10.4.7.11:2380 \
       --listen-client-urls https://10.4.7.11:2379,http://127.0.0.1:2379 \
       --quota-backend-bytes 8000000000 \
       --initial-advertise-peer-urls https://10.4.7.11:2380 \
       --advertise-client-urls https://10.4.7.11:2379,http://127.0.0.1:2379 \
       --initial-cluster  etcd-server-7-11=https://10.4.7.11:2380,etcd-server-7-12=https://10.4.7.12:2380,etcd-server-7-13=https://10.4.7.13:2380 \
       --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
       
chmod +x etcd-server-startup.sh 
chown -R etcd.etcd /opt/etcd-v3.4.7/ /data/etcd/ /data/logs/etcd-server/
yum install supervisor -y
systemctl start supervisord
systemctl enable supervisord
vim /etc/supervisord.d/etcd-server.ini
[program:etcd-server-7-11]
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)

supervisorctl update
supervisorctl status

状态有报错，查看日志vim /data/logs/etcd-server/etcd.stdout.log

flag provided but not defined: -ca-file
看起来CA证书文件有问题，查看证书目录是有证书文件的，看报错提示应该是-ca-file这个字段没定义，那么有可能是我使用的是最新版的etcd修改了这个字段

使用./etcd -h查看帮助，果然字段中没有包含这个

尝试将这一行注释并重新加载supervisorctl reload


又报证书文件没有颁发。。。
果然使用最新版容易踩坑，还查不到解决方法。果断换个版本。重新下载3.3.20。
修改软连接到3.3.20版本，拷贝原来的certs目录和etcd-server-startup.sh到当前版本etcd目录下，重新赋予权限，并sh脚本中去掉之前加的注释

chmod +x etcd-server-startup.sh 
chown -R etcd.etcd /opt/etcd-v3.3.20/ /data/etcd/ /data/logs/etcd-server/ 
supervisorctl reload
supervisorctl status

果然解决了

另外两个etcd节点同理