Kubernetes集群存储之etcd

Kubernetes集群存储之etcd

部署

签发ca证书

创建证书请求文件

[root@lab-26 ~]# 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"
                ]
            }
        }
    }
}

创建证书文件

[root@lab-26 ~]# vi /opt/certs/etcd-peer-csr.json

# hosts 只能添加ip地址，地址为可能部署的etcd的服务器上
{
    "CN": "k8s-etcd",
    "hosts": [
        "172.17.152.106"
    ],
    "key": {
        "algo": "rsa",
        "size": 2048
    },
    "names": [
        {
            "C": "CN",
            "ST": "beijing",
            "L": "beijing",
            "O": "op",
            "OU": "ops"
        }
    ]
}

签发证书

[root@lab-26 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

解压配置etcd

[root@lab-26 certs]# useradd -s /sbin/nologin -M etcd
[root@lab-26 certs]# cd /opt/src 

软件包下载地址

[root@lab-26 certs]# tar xvf etcd-v3.1.20-linux-amd64.tar.gz -C /opt/
[root@lab-26 src]# cd /opt/
[root@lab-26 opt]# mv etcd-v3.1.20-linux-amd64/ etcd-v3.1.20
[root@lab-26 opt]# ln -s etcd-v3.1.20/ etcd
[root@lab-26 opt]# mkdir -p /data/etcd /opt/etcd/certs /data/logs/etcd-server

拷贝证书

[root@lab-26 opt]# cd /opt/etcd/certs/
[root@lab-26 certs]# cp /opt/certs/ca.pem .
[root@lab-26 certs]# cp /opt/certs/ca-key.pem .
[root@lab-26 certs]# cp /opt/certs/etcd-peer .
[root@lab-26 certs]# cp /opt/certs/etcd-peer-key.pem .
[root@lab-26 certs]# cp /opt/certs/etcd-peer.pem .

创建启动脚本

[root@lab-26 certs]# vi /opt/etcd/etcd-server-startup.sh

#!/bin/sh
./etcd --name etcd-server-152-106 \
       --data-dir /data/etcd/etcd-server \
       --listen-peer-urls https://172.17.152.106:2380 \
       --listen-client-urls https://172.17.152.106:2379,http://127.0.0.1:2379 \
       --quota-backend-bytes 8000000000 \
       --initial-advertise-peer-urls https://172.17.152.106:2380 \
       --advertise-client-urls https://172.17.152.106:2379,http://127.0.0.1:2379 \
       --initial-cluster  etcd-server-152-106=https://172.17.152.106:2380 \
       --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

[root@lab-26 certs]# chmod +x /opt/etcd/etcd-server-startup.sh 
[root@lab-26 certs]# chown -R etcd. /data/etcd
[root@lab-26 certs]# chown -R etcd. /data/logs/
[root@lab-26 certs]# chown -R etcd. /opt/etcd/certs

使用supervisor工具管理服务

[root@lab-26 certs]# vi /etc/supervisord.d/etcd-server.ini

[program:etcd-server-152-106]
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)
killasgroup=true
stopasgroup=true

[root@lab-26 certs]# systemctl start supervisord
[root@lab-26 certs]# systemctl enable supervisord
[root@lab-26 ctchat]# supervisorctl status
etcd-server-152-106              RUNNING   pid 22579, uptime 0:01:29

至此部署成功。