Docker入门到放弃

Docker(四) 存储卷

2020-06-17  本文已影响0人  Starlightskm

docker存储卷

数据卷

image.png
- 关闭并重启容器,其数据不受影响,但是删除容器,则其更改将会全部丢失

- 存在的问题:

    - 存储与联合文件系统中,不易于宿主机访问

    - 容器键数据共享不便

    - 删除容器其数据会丢失

设置随机卷


[root@centos7-node1 ~]# docker run --name mybbox5 -it -v /mydata --rm busybox /bin/sh     #指定容器卷,容器中不存在则自动创建

/ # cd /mydata/

[root@centos7-node1 ~]# docker inspect mybbox5   # 另起窗口查看挂载

  "Mounts": [

            {

                "Type": "volume",

                "Name": "a39b4a68fc51d83900093f35b05b4e29085b2d45d1fa9a19f63f75130dbf1d0c",

                "Source": "/data/docker/volumes/a39b4a68fc51d83900093f35b05b4e29085b2d45d1fa9a19f63f75130dbf1d0c/_data",

                "Destination": "/mydata",

                "Driver": "local",

                "Mode": "",

                "RW": true,

                "Propagation": ""

            }

        ],

image.png

绑定挂载卷


[root@centos7-node1 ~]# mkdir /data/volumes/v1 -p

[root@centos7-node1 v1]# echo "hello" > /data/volumes/v1/my.txt

[root@centos7-node1 ~]# docker run --name mybox -it -v /data/volumes/v1:/mydata busybox /bin/sh 

[root@centos7-node1 ~]# docker rm mybox

mybox

[root@centos7-node1 ~]# ls /data/volumes/v1/

my.txt

容器间数据共享的案例


[root@centos7-node1 ~]# docker run --name box6 -it -d -v /data/volumes/v1:/mydata busybox /bin/sh 

[root@centos7-node1 ~]# docker run --name box7 -it --rm --volumes-from box6 busybox

inspect数据显示


[root@centos7-node1 v1]# docker inspect box7    #查看容器,找出对应字段

[root@centos7-node1 v1]# docker inspect -f {{.Mounts}} box6    #.Mounts是顶级字段

[root@centos7-node1 v1]# docker inspect -f {{.NetworkSettings.Networks.bridge}} box7     #多级字段之间用.连接

实战


[root@centos7-node1 ~]# mkdir /data/volumes/mysql

[root@centos7-node1 ~]# docker pull mysql:5.5

[root@centos7-node1 ~]# docker run --name db -d -v /data/volumes/mysql:/var/lib/mysql -e MYSQL_ROOT_PASSWORD=qwer1234 mysql:5.5

[root@centos7-node1 ~]# docker exec -it db /bin/bash      #进入数据库,创建用户以及数据库

root@38b54e3d76cf:/# mysql -uroot -p

mysql> create database wordpress charset utf8;

mysql> grant all on wordpress.* to 'wordpress'@'127.0.0.1' identified by 'wpss2020';

[root@centos7-node1 ~]# docker pull php:5.6-fpm

[root@centos7-node1 ~]# docker pull nginx:1.18-alpine 

[root@centos7-node1 ~]#mkdir/data/volumes/nginx_conf -p   #nginx配置文件目录 

[root@centos7-node1 ~]# cat /data/volumes/nginx_conf/nginx_php.conf    #定义好Nginx-php配置文件

server {

    listen       80;

    server_name  localhost;

    location / {

        root   /www/wordpress;

        index  index.php;

    }

    error_page   500 502 503 504  /50x.html;

    location = /50x.html {

        root   /usr/share/nginx/html;

    }

    location ~ \.php$ {

        fastcgi_pass   php:9000;

        fastcgi_index  index.php;

        fastcgi_param  SCRIPT_FILENAME  /www/wordpress/$fastcgi_script_name;

        include        fastcgi_params;

    }

}

[root@centos7-node1 ~]# docker run --name php-fpm -d -v /data/volumes/web:/www  php:5.6-fpm    #启动php

[root@centos7-node1 ~]# docker run --name nginx_php -d -p 80:80 -v /data/volumes/nginx_conf:/etc/nginx/conf.d  --volumes-from php-fpm --link php-fpm:php nginx:1.18-alpine     #启动nginx

[root@centos7-node1 ~]#  cd /data/volumes/web && wget https://wordpress.org/latest.zip

root@centos7-node1 web]# unzip wordpress-5.4.1.zip 

[root@centos7-node1 ~]# docker exec nginx_php nginx -s reload

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