Docker 实战之Registry以及持续集成

1、获取代码，fork到自己的仓库

2、将代码克隆到服务器本地

（1）运行git命令前需要先安装git

安装git命令：

yum -y install git

检验：

[root@aubin ~]# git --version
git version 1.8.3.1

克隆：

[root@aubin ~]# git clone https://gitee.com/zhai_huabing/docker-training.git
Cloning into 'docker-training'...
remote: Enumerating objects: 2057, done.
remote: Counting objects: 100% (2057/2057), done.
remote: Compressing objects: 100% (1331/1331), done.
remote: Total 2057 (delta 688), reused 2057 (delta 688), pack-reused 0
Receiving objects: 100% (2057/2057), 7.13 MiB | 765.00 KiB/s, done.
Resolving deltas: 100% (688/688), done.

进入克隆到的目录：

[root@aubin docker-training]# ls
centos7  LICENSE  mysql  php-fpm  README.md  wordpress

进入centos的镜像文件，查看镜像的Dockerfile：

[root@aubin centos7]# ls
aliyun-epel.repo  aliyun-mirror.repo  Dockerfile  supervisord.conf
[root@aubin centos7]# vi Dockerfile
#
# MAINTAINER        Carson,C.J.Zeong <zcy@nicescale.com>
# DOCKER-VERSION    1.6.2
#
# Dockerizing CentOS7: Dockerfile for building CentOS images
#
FROM       centos:centos7.1.1503
MAINTAINER Carson,C.J.Zeong <zcy@nicescale.com>

ENV TZ "Asia/Shanghai"
ENV TERM xterm

ADD aliyun-mirror.repo /etc/yum.repos.d/CentOS-Base.repo
ADD aliyun-epel.repo /etc/yum.repos.d/epel.repo

RUN yum install -y curl wget tar bzip2 unzip vim-enhanced passwd sudo yum-utils hostname net-tools rsync man && 
    yum install -y gcc gcc-c++ git make automake cmake patch logrotate python-devel libpng-devel libjpeg-devel && 
    yum install -y --enablerepo=epel pwgen python-pip && 
    yum clean all

RUN pip install supervisor
ADD supervisord.conf /etc/supervisord.conf

RUN mkdir -p /etc/supervisor.conf.d && 
    mkdir -p /var/log/supervisor

EXPOSE 22

ENTRYPOINT ["/usr/bin/supervisord", "-n", "-c", "/etc/supervisord.conf"]

3、利用DockerFile创建一个centos镜像并生成容器

（1）build一个镜像

docker build -t zhai/20201027/centos:7.1 .

点代表的是当前目录

（2）查看镜像

[root@aubin centos7]# docker images
REPOSITORY             TAG                 IMAGE ID            CREATED             SIZE
zhai/20201027/centos   7.1                 1a86793f175f        41 seconds ago      626MB
zhai/centos            latest              8f28e3fd97da        4 days ago          215MB
tomcat                 latest              625b734f984e        4 days ago          648MB
mysql                  5.6                 c580203d8753        4 days ago          302MB
redis                  latest              bd571e6529f3        13 days ago         104MB
mongo                  latest              ba0c2ff8d362        4 weeks ago         492MB
centos                 latest              0d120b6ccaa8        2 months ago        215MB
hello-world            latest              bf756fb1ae65        9 months ago        13.3kB
centos                 centos7.1.1503      e1430271e2f9        19 months ago       212MB
tomcat                 8.5.32              5808f01b11bf        2 years ago         463MB

（3）根据镜像生成容器

[root@aubin centos7]# docker run -d -p 1233:22 --name centosbase zhai/20201027/centos:7.1
880d09c3e6e245d9cef60c0ff78c268c7110d46b24fd36eb0811f5a7792b002e
[root@aubin centos7]# docker ps
CONTAINER ID        IMAGE                      COMMAND                  CREATED             STATUS              PORTS                     NAMES
880d09c3e6e2        zhai/20201027/centos:7.1   "/usr/bin/supervisor猞"   19 seconds ago      Up 9 seconds        0.0.0.0:1233->22/tcp      centosbase
89c7173b7764        mysql:5.6                  "docker-entrypoint.s猞"   3 days ago          Up 20 hours         0.0.0.0:12345->3306/tcp   mysql

-d：后台运行

exec -it：交互式模式

-p：自定义端口映射

-P：随机端口映射

4、利用DockerFile创建一个php镜像并创建容器

（1）查看php镜像的Dockerfile

[root@aubin docker-training]# ls
centos7  LICENSE  mysql  php-fpm  README.md  wordpress
[root@aubin docker-training]# cd php-fpm
[root@aubin php-fpm]# ls
Dockerfile  nginx_default.conf  nginx_nginx.conf  php_www.conf  supervisor_nginx.conf  supervisor_php-fpm.conf
[root@aubin php-fpm]# vi Dockerfile
#
# MAINTAINER        Carson,C.J.Zeong <zcy@nicescale.com>
# DOCKER-VERSION    1.6.2
#
# Dockerizing php-fpm: Dockerfile for building php-fpm images
#
FROM       zhai/20201027/centos:7.1   基于centos7.1作为父镜像,这个镜像要确保自己的docker中已经存在该镜像
MAINTAINER Carson,C.J.Zeong <zcy@nicescale.com>   谁来维护，作者和邮箱

# Set environment variable
ENV     APP_DIR /app    

RUN     rpm --rebuilddb &&  yum -y swap -- remove fakesystemd -- install systemd systemd-libs && 
        yum -y install nginx php-cli php-mysql php-pear php-ldap php-mbstring php-soap php-dom php-gd php-xmlrpc php-fpm php-mcrypt && 
        yum clean all    安装一些服务

ADD nginx_nginx.conf /etc/nginx/nginx.conf
ADD     nginx_default.conf /etc/nginx/conf.d/default.conf

ADD     php_www.conf /etc/php-fpm.d/www.conf
RUN     sed -i 's/;cgi.fix_pathinfo=1/cgi.fix_pathinfo=0/' /etc/php.ini

RUN     mkdir -p /app && echo "<?php phpinfo(); ?>" > ${APP_DIR}/info.php

EXPOSE  80 443

ADD     supervisor_nginx.conf /etc/supervisor.conf.d/nginx.conf
ADD     supervisor_php-fpm.conf /etc/supervisor.conf.d/php-fpm.conf

ONBUILD ADD . /app
ONBUILD RUN chown -R nginx:nginx /app
~

（2）创建镜像并创建该镜像的一个容器

创建镜像：

docker build -t zhai/php-fpm:5.4 .

创建镜像的容器：

[root@aubin php-fpm]# docker run -d -p 1234:80 --name zhaiphp zhai/php-fpm:5.4
e6184d5a6777034f7faf257ab5b206f4421bac8926af0af266bd19959b859462

（3）访问info.php页面测试php的容器是否创建成功

 （4）查看容器的服务

[root@e6184d5a6777 /]# supervisorctl
nginx                            RUNNING   pid 8, uptime 0:08:26
php-fpm                          RUNNING   pid 9, uptime 0:08:26
supervisor> 

退出用exit命令，退出一个容器也用exit命令

5、创建mysql镜像

（1）查看mysql的Dockerfile

[root@aubin docker-training]# ls
centos7  LICENSE  mysql  php-fpm  README.md  wordpress
[root@aubin docker-training]# cd mysql
[root@aubin mysql]# ls
Dockerfile  mysqld_charset.cnf  scripts
[root@aubin mysql]# vi Dockerfile
#
# MAINTAINER        Carson,C.J.Zeong <zcy@nicescale.com>
# DOCKER-VERSION    1.6.2
#
# Dockerizing Mariadb: Dockerfile for building Mariadb images
#
FROM csphere/centos:7.1
MAINTAINER Carson,C.J.Zeong <zcy@nicescale.com>

ENV DATA_DIR /var/lib/mysql

# Install Mariadb
RUN rpm --rebuilddb && 
    yum install -y mariadb mariadb-server && 
    yum clean all

ADD mysqld_charset.cnf /etc/my.cnf.d/

COPY scripts /scripts
RUN chmod +x /scripts/start

EXPOSE 3306

VOLUME ["/var/lib/mysql"]   数据卷，进行容器与宿主机的映射，保证在容器删除的情况下，容器中的数据不会丢失

ENTRYPOINT ["/scripts/start"]
~
~

（2）运用docker的build命令创建一个镜像

（3）创建一个容器

不指定数据卷，在删除容器后容器的数据不保存：

[root@aubin mysql]# docker run -d -p 3306:3306 --name dbserver zhai/20201027/mysql:5.5
53718319f10aed8a41b0ecfa681a39ce91ee880e55a7c50224c2aa9347620434

定义数据卷，在删除容器后日志与数据依旧能够保存：

docker run -p 12345:3306 
--name mysql 
-v /zzyyuse/mysql/conf:/etc/mysql/conf.d 
-v /zzyyuse/mysql/logs:/logs 
-v /zzyyuse/mysql/data:/var/lib/mysql 
-e MYSQL_ROOT_PASSWORD=123456 
-d mysql:5.6

（4）交互式运行

[root@aubin mysql]# docker exec -it dbserver /bin/bash
[root@53718319f10a /]# mysql
Welcome to the MariaDB monitor.  Commands end with ; or g.
Your MariaDB connection id is 1
Server version: 5.5.65-MariaDB MariaDB Server

Copyright (c) 2000, 2018, Oracle, MariaDB Corporation Ab and others.

Type 'help;' or 'h' for help. Type 'c' to clear the current input statement.


MariaDB [(none)]> show databases;
+--------------------+
| Database           |
+--------------------+
| information_schema |
| mysql              |
| performance_schema |
| test               |
+--------------------+
4 rows in set (0.05 sec)

6、利用容器构建一个动态网站

（1）查看wordpress的Dockerfile文件

[root@aubin wordpress]# cd ..
[root@aubin docker-training]# cd wordpress
[root@aubin wordpress]# ls
Dockerfile  license.txt      wp-admin              wp-config-sample.php  wp-includes        wp-login.php     wp-signup.php
index.php   readme.html      wp-blog-header.php    wp-content            wp-links-opml.php  wp-mail.php      wp-trackback.php
init.sh     wp-activate.php  wp-comments-post.php  wp-cron.php           wp-load.php        wp-settings.php  xmlrpc.php
[root@aubin wordpress]# vi Dockerfile
from zhai/php-fpm:5.4

add init.sh /init.sh    脚本

entrypoint ["/init.sh", "/usr/bin/supervisord", "-n", "-c", "/etc/supervisord.conf"]

该文件是与php的Dockerfile文件相关联的：

ADD     supervisor_nginx.conf /etc/supervisor.conf.d/nginx.conf
ADD     supervisor_php-fpm.conf /etc/supervisor.conf.d/php-fpm.conf

ONBUILD ADD . /app
ONBUILD RUN chown -R nginx:nginx /app
~

ONBUILD：父镜像在被子继承后父镜像的onbuild被触发，也就是说在构建wordpress的时候最后两条命令将会被执行

（2）构建wordpress的镜像

[root@aubin wordpress]# docker build -t zhai/20201027/wordpress:4.2 .
Sending build context to Docker daemon   19.8MB
Step 1/3 : from zhai/php-fpm:5.4
# Executing 2 build triggers
 ---> Running in 782dec5ed952
Removing intermediate container 782dec5ed952
 ---> 660aa0c11c63
Step 2/3 : add init.sh /init.sh
 ---> 7696f83d43c0
Step 3/3 : entrypoint ["/init.sh", "/usr/bin/supervisord", "-n", "-c", "/etc/supervisord.conf"]
 ---> Running in 5618dda9722b
Removing intermediate container 5618dda9722b
 ---> 73b872365fc6
Successfully built 73b872365fc6
Successfully tagged zhai/20201027/wordpress:4.2

（3）要保证php和mysql的容器都已经创建

[root@aubin ~]#  docker run -d -p 80:80 --name wordpress3  
-e WORDPRESS_DB_HOST=192.168.88.130 
-e WORDPRESS_DB_USER=root 
-e WORDPRESS_DB_PASSWORD=123456 zhai/20201027/wordpress:4.2
aa342a895f5ee66d7c9e29d7eb9792703a061a490bd72b22945c3a12c2039ef3
[root@aubin ~]# docker ps
CONTAINER ID        IMAGE                         COMMAND                  CREATED             STATUS              PORTS                                   NAMES
aa342a895f5e        zhai/20201027/wordpress:4.2   "/init.sh /usr/bin/s猞"   37 seconds ago      Up 34 seconds       22/tcp, 443/tcp, 0.0.0.0:80->80/tcp     wordpress3
df4e5ccf9c0d        zhai/php-fpm:5.4              "/usr/bin/supervisor猞"   3 minutes ago       Up 3 minutes        22/tcp, 443/tcp, 0.0.0.0:1234->80/tcp   zhaiphp1
d4672dec387f        mysql:5.6  

-e是传递参数，给脚本init.sh传递执行所需要的参数