1.1 Docker 要求 CentOS 系統的內核版本高於 3.10mysql
[root@localhost ~]# uname -r 3.10.0-693.el7.x86_64
1.2 確保 yum 包更新到最新。linux
[root@localhost ~]# sudo yum update Loaded plugins: fastestmirror, langpacks Loading mirror speeds from cached hostfile * base: mirrors.cqu.edu.cn * extras: mirrors.cqu.edu.cn * updates: mirrors.cqu.edu.cn base | 3.6 kB 00:00:00 docker-ce-stable | 3.5 kB 00:00:00 extras | 2.9 kB 00:00:00 updates | 2.9 kB 00:00:00
1.3 安裝須要的軟件包, yum-util 提供yum-config-manager功能,另外兩個是devicemapper驅動依賴的sql
[root@localhost ~]# sudo yum install -y yum-utils device-mapper-persistent-data lvm2 Loaded plugins: fastestmirror, langpacks Loading mirror speeds from cached hostfile * base: mirrors.cqu.edu.cn * extras: mirrors.cqu.edu.cn * updates: mirrors.cqu.edu.cn Package yum-utils-1.1.31-52.el7.noarch already installed and latest version Package device-mapper-persistent-data-0.8.5-1.el7.x86_64 already installed and latest version Package 7:lvm2-2.02.185-2.el7_7.2.x86_64 already installed and latest version Nothing to do
1.4 設置yum源docker
[root@localhost ~]# sudo yum-config-manager --add-repo https://download.docker.com/linux/centos/docker-ce.repo Loaded plugins: fastestmirror, langpacks adding repo from: https://download.docker.com/linux/centos/docker-ce.repo grabbing file https://download.docker.com/linux/centos/docker-ce.repo to /etc/yum.repos.d/docker-ce.repo repo saved to /etc/yum.repos.d/docker-ce.repo
1.5 安裝dockershell
[root@localhost ~]# sudo yum install docker-ce Loaded plugins: fastestmirror, langpacks Loading mirror speeds from cached hostfile * base: mirrors.cqu.edu.cn * extras: mirrors.cqu.edu.cn * updates: mirrors.cqu.edu.cn Package 3:docker-ce-19.03.8-3.el7.x86_64 already installed and latest version Nothing to do
1.6 啓動docker並設置docker自動啓動數據庫
[root@localhost ~]# sudo systemctl start docker [root@localhost ~]# sudo systemctl enable docker
1.7 檢測docker是否安裝成功json
[root@localhost ~]# docker version Client: Docker Engine - Community Version: 19.03.8 API version: 1.40 Go version: go1.12.17 Git commit: afacb8b Built: Wed Mar 11 01:27:04 2020 OS/Arch: linux/amd64 Experimental: false Server: Docker Engine - Community Engine: Version: 19.03.8 API version: 1.40 (minimum version 1.12) Go version: go1.12.17 Git commit: afacb8b Built: Wed Mar 11 01:25:42 2020 OS/Arch: linux/amd64 Experimental: false containerd: Version: 1.2.13 GitCommit: 7ad184331fa3e55e52b890ea95e65ba581ae3429 runc: Version: 1.0.0-rc10 GitCommit: dc9208a3303feef5b3839f4323d9beb36df0a9dd docker-init: Version: 0.18.0 GitCommit: fec3683
2.1 docker更換國內阿里倉庫centos
sudo mkdir -p /etc/docker sudo tee /etc/docker/daemon.json <<-'EOF' { "registry-mirrors": ["https://rdwyjupq.mirror.aliyuncs.com"] } EOF sudo systemctl daemon-reload sudo systemctl restart docker
2.2 安裝MySQL服務器
2.2.1 下載MySQLapp
[root@localhost ~]# docker pull mysql Using default tag: latest latest: Pulling from library/mysql c499e6d256d6: Pull complete 22c4cdf4ea75: Pull complete 6ff5091a5a30: Pull complete 2fd3d1af9403: Pull complete 0d9d26127d1d: Pull complete 54a67d4e7579: Pull complete fe989230d866: Pull complete 3a808704d40c: Pull complete 826517d07519: Pull complete 69cd125db928: Pull complete b5c43b8c2879: Pull complete 1811572b5ea5: Pull complete Digest: sha256:b69d0b62d02ee1eba8c7aeb32eba1bb678b6cfa4ccfb211a5d7931c7755dc4a8 Status: Downloaded newer image for mysql:latest docker.io/library/mysql:latest
2.2.2 查看MySQL鏡像
[root@localhost ~]# docker images REPOSITORY TAG IMAGE ID CREATED SIZE mysql latest 9228ee8bac7a 4 days ago 547MB
2.2.3 建立MySQL的掛載文件目錄(日誌、數據、配置)
[root@localhost ~]# mkdir -p /root/mysql/data /root/mysql/logs /root/mysql/conf
2.2.4 先啓動容器(爲了複製配置文件)(這種作法顯得多餘,可是Docker不是很精通的我沒想到更好的辦法,請各位大神指導)
[root@localhost conf]# docker run -d -p 3306:3306 --name mysql -e MYSQL_ROOT_PASSWORD="123456" mysql 05d161e69f3b2e3e4ebaa50f822934599a31e7ade330e1440a68aec9e404f7ae
2.2.5 複製配置文件
[root@localhost conf]# docker cp mysql:/etc/mysql/my.cnf /root/mysql/conf/
2.2.6 中止並刪容器
[root@localhost conf]# docker stop mysql mysql [root@localhost conf]# docker rm mysql mysql
2.2.7 從新啓動容器(加上掛載)
[root@localhost conf]# docker run --name mysql -p 3306:3306 -e MYSQL_ROOT_PASSWORD=123456 --mount type=bind,src=/root/mysql/conf/my.cnf,dst=/etc/mysql/my.cnf --mount ty pe=bind,src=/root/mysql/data,dst=/var/lib/mysql --mount type=bind,src=/root/mysql/logs,dst=/logs --restart=on-failure:3 -d mysql64824c7e84ceb3513b65a375c55f2c53bc653f95b119008296122b13ff632ba1
2.2.8 進入MySQL查詢現有字符集,結果都是utf8mb4
show variables like '%char%';
2.2.9 在掛載的配置文件更改字符集
character-set-server=utf8 default-character-set=utf8 default-character-set=utf8
2.2.10 重啓docker容器,並查看字符集已經更改,證實掛載的配置文件有效
3.1 配置主Master庫
3.1.1 進入主庫掛載配置文件my.cnf,加入如下配置並重啓docker容器
[mysqld] ## 同一局域網內注意要惟一 server-id=100 ## 開啓二進制日誌功能,能夠隨便取(關鍵) log-bin=mysql-bin
3.1.2 在主Master庫執行語句
CREATE USER 'slave'@'%' IDENTIFIED BY '123456'; GRANT REPLICATION SLAVE, REPLICATION CLIENT ON *.* TO 'slave'@'%';
爲防止後面出現報錯[Authentication plugin 'caching_sha2_password' cannot be loaded],執行下面語句
ALTER USER 'slave'@'%' IDENTIFIED BY 'password' PASSWORD EXPIRE NEVER; #修改加密規則 ALTER USER 'slave'@'%' IDENTIFIED WITH mysql_native_password BY 'password'; #更新一下用戶的密碼 FLUSH PRIVILEGES; alter user 'slave'@'%' identified by '123456';
最後執行語句獲取File, Position
show master status;
3.2 配置從Slave庫
3.2.1 進入從庫掛載配置文件my.cnf,加入如下配置並重啓docker容器
[mysqld] ## 設置server_id,注意要惟一 server-id=101 ## 開啓二進制日誌功能,以備Slave做爲其它Slave的Master時使用 log-bin=mysql-slave-bin ## relay_log配置中繼日誌 relay_log=edu-mysql-relay-bin
3.2.2 連接主從庫,在從庫執行語句
change master to master_host='192.168.47.128', master_user='slave', master_password='123456', master_port=3306, master_log_file='mysql-bin.000001', master_log_pos= 5938, master_connect_retry=30;
master_host :Master的地址
master_port:Master的端口號,指的是容器的端口號
master_user:用於數據同步的用戶
master_password:用於同步的用戶的密碼
master_log_file:指定 Slave 從哪一個日誌文件開始複製數據,即上文中提到的 File 字段的值
master_log_pos:從哪一個 Position 開始讀,即上文中提到的 Position 字段的值
master_connect_retry:若是鏈接失敗,重試的時間間隔,單位是秒,默認是60秒
3.2.3 查看主從同步狀態
show slave status ;
正常狀況下,SlaveIORunning 和 SlaveSQLRunning 都是No,由於咱們尚未開啓主從複製過程。
3.2.4 開啓主從複製
start slave;
從新查看主從同步狀態, 這時SlaveIORunning 和 SlaveSQLRunning 都是Yes,若是你的SlaveIORunning 和 SlaveSQLRunning 其中一個是Connecting或者No,就證實配置有錯,查看Last_IO_Error報錯的詳細信息
經過下面命令,刪除已經配置的主從連接信息,從新進行配置
stop slave; reset master;
3.2.5 測試主從複製,最簡單的方式是在主庫創建個新庫,這時,從庫會自動同步