2-2、dockerfile之php-fpm,mysql
dockerfile之php-fpm # cd docker-training/php-fpm/ # ls Dockerfile nginx_nginx.conf supervisor_nginx.conf nginx_default.conf php_www.conf supervisor_php-fpm.conf 各文件解释: nginx_nginx.conf 替换默认的nginx.conf文件 nginx_default.conf 替换默认的default.conf文件 php_www.conf 修改apache用户为nginx supervisor_nginx.conf 添加启动nginx的supervisor文件 supervisor_php-fpm.conf 添加启动php-fpm的supervisor文件 php-fpm Dockerfile文件: # cat docker-training/php-fpm/Dockerfile # # MAINTAINER Carson,C.J.Zeong <zcy@nicescale.com> # DOCKER-VERSION 1.6.2 # # Dockerizing php-fpm: Dockerfile for building php-fpm images # FROM csphere/centos:7.1 #FROM 6a42a6009825 #centos:7.1的image id MAINTAINER Carson,C.J.Zeong <zcy@nicescale.com> # Set environment variable ENV APP_DIR /app RUN 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 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 命令解析: ONBUILD ADD . /app ONBUILD 在生成当前docker镜像的时候不生效,在子镜像生效;ONBUILD在产品发布时起着非常重要的作用! 举例: A镜像中有ONBUILD指令,在构建A镜像时ONBUILD指令不执行;B镜像FROM A,在构建B镜像时ONBUILD指令开始执行; 如何给docker镜像命名: registry-url: registry服务器的域名或者ip namespace: image-name: docker镜像的名字 tag: docker镜像的版本号,推荐使用应用服务的版本号来命名,如php-fpm:5.4 生成php-fpm镜像: docker build -t csphere/php-fpm:5.4 . Step 12 : ONBUILD add . /app ---> Running in 9e21ede67350 ---> 7541483a5a76 Removing intermediate container 9e21ede67350 Step 13 : ONBUILD run chown -R nginx:nginx /app ---> Running in ab55fc7a46a1 ---> c61699e8c237 Removing intermediate container ab55fc7a46a1 Successfully built c61699e8c237 生成website容器: docker run -d -p 8080:80 --name website csphere/php-fpm:5.4 # docker run -d -p 8080:80 --name website php-fpm:5.4 da30b15d3518320f4150b20ef329e59432a65610968977277879578b5fd8f4f7 参数解释: -d 后台运行 -p 8080:80 将宿主机的8080端口映射到容器的80端口 --name website 给容器命名为website csphere/php-fpm:5.4 使用这个镜像镜像创建docker容器 使用浏览器访问:http://your_ip:8080/info.php 如何进入一个正在运行的docker容器? docker exec -it website /bin/bash #查看当前容器中使用supervisor启动了哪些服务 # supervisorctl nginx RUNNING pid 9, uptime 0:23:15 php-fpm RUNNING pid 10, uptime 0:23:15 ####################### csphere/mysql:5.5 cat csphere/mysql/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 #FROM 6a42a6009825 #centos:7.1的image id MAINTAINER Carson,C.J.Zeong <zcy@nicescale.com> ENV DATA_DIR /var/lib/mysql # Install Mariadb RUN 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"] ENTRYPOINT ["/scripts/start"] ----------------------- 命令解析: VOLUME ["/var/lib/mysql"] VOLUME指令,宿主机文件目录和docker容器文件目录做映射 ENTRYPOINT ["/scripts/start"] ENTRYPOINT在每次启动docker容器时都会被执行,此例,是运行了一个shell脚本"/scripts/start" 每次启动都会运行/scripts/start脚本,脚本内容如下: # cat start #!/bin/bash set -e # # When Startup Container script # if [[ -e /scripts/firstrun ]]; then # config mariadb /scripts/firstrun_maria rm /scripts/firstrun else # Cleanup previous mariadb sockets if [[ -e ${DATA_DIR}/mysql.sock ]]; then rm -f ${DATA_DIR}/mysql.sock fi fi exec /usr/bin/mysqld_safe ------------------------- 脚本解析: set -e 脚本中只要有一行有错误,就会中断脚本执行 如果firstrun文件存在,执行firstrun_maria脚本,如果不存在,删除mysql.sock文件,并启动Mariadb firstrun_maira脚本是初始化Mariadb,以及设置数据库用户和密码,详情内容请自行阅读脚本文件 构建mysql docker镜像: docker build -t csphere/mysql:5.5 . ###docker volume 保证删除容器后,数据不被删除 保存容器中的数据 数据共享 使用方法: 1.在Dockerfile中定义VOLUME["/data"] 2.通过docker run -d -v <host_dir>:<container_dir> ###案例: 创建mysql容器,不挂载docker volume,删除后,数据是否存在 创建mysql容器,挂载docker volume,删除后,数据是否存在 运行不挂载docker volume的mysql容器: # docker run -d -p 3306:3306 --name dbserver csphere/mysql:5.5 # docker run -d -p 3306:3306 --name dbserver mysql:5.5 0a3092395c1e6a84f0ecd5383799f210519c5aefc82cbb7ee2ed1a471fc463f5 删除docker容器,容器里面的数据都会随着容器被删除而删除 # docker rm dbserver Error response from daemon: Cannot destroy container dbserver: Conflict, You cannot remove a running container. Stop the container before attempting removal or use -f Error: failed to remove containers: [dbserver] 参数解释: 删除状态为“Exited”的docker容器: docker rm 强制删除docker容器: docker rm -f 运行挂载docker volume的mysql容器: docker run -d -p 3306:3306 -v /var/lib/docker/vfs/dir/mydata:/var/lib/mysql csphere/mysql:5.5 f49165d5e081b8bd8af9cb9c0bbbeb6545d45f857c1a852646c105 docker exec -it f49 /bin/bash 登陆数据库创建mydb数据库 # mysql # show databases; # create database mydb; Query OK, 1 row affected (0.00 sec) # show databases; +--------------------+ | Database | +--------------------+ | information_schema | | mydb | | mysql | | performance_schema | | test | +--------------------+ 5 rows in set (0.00 sec) # exit exit 查看主机文件目录下,是否已生成mydb数据库目录文件 # ls /var/lib/docker/vfs/dir/mydata/ aria_log.00000001 ibdata1 ib_logfile1 mysql performance_schema aria_log_control ib_logfile0 mydb mysql.sock test 停止docker容器: # docker stop f49165d5e081 f49165d5e081 删除docker容器,查看`mydb`目录是否被删除: # docker rm f49165d5e081 f49165d5e081 # ls /var/lib/docker/vfs/dir/mydata/ 验证,挂载docker volume后,容器被删除掉,数据还在 aria_log.00000001 ibdata1 ib_logfile1 mysql performance_schema aria_log_control ib_logfile0 mydb mysql.sock test 新创建一个容器,挂载到刚才的数据目录下,是否可以把之前的数据库加载回来: docker run -d -p 3306:3306 --name newdb -v /var/lib/docker/vfs/dir/mydata:/var/lib/mysql csphere/mysql:5.5 29418b93d4d4a00a86169c568b6f952e71d25b155d7f6b8012d953022691b2b8 docker exec -it newdb /bin/bash # mysql MariaDB [(none)]> show databases; +--------------------+ | Database | +--------------------+ | information_schema | | mydb | | mysql | | performance_schema | | test | +--------------------+ 5 rows in set (0.00 sec)