Docker Compose
1、介绍
Compose是一个定义和管理多容器的工具,使用Python语言编写。使用Compose配置文件描述多个容器应用的架构,比如使用什么镜像、数据卷、网络、映射端口等;然后一条命令管理所有服务,比如启动、停止、重启等。
2、安装
curl -L https://github.com/docker/compose/releases/download/1.15.0/docker-compose-`uname -s`-`uname -m` -o /usr/local/bin/docker-compose
chmod +x /usr/local/bin/docker-compose
或者
pip install docker-compose
3、YAML文件格式及编写注意事项
YAML是一种标记语言很直观的数据序列格式,可读性高。类似于XML数据描述语言,语法比XML简单的很多。
YAML数据结构通过缩进来表示,连续的项目通过减号来表示,健值对用冒号分隔,数据用中括号括起来,hash用花括号括起来。
YAML文件格式注意事项
1.不支持制表符tab键缩进,需要使用空格缩进
2.通常开头缩进2个空格
3.字符后缩进1个空格,如冒号、逗号、横杆
4.用井号注释
5.如果包含特殊字符用单引号引起来
6.布尔值(true、false、yes、no、on、off)必须用括号括起来,这样分析器会将他们解释为字符串。
docker-compose搭建lnmp
先把老师的Compose.zip包下载到机器上,然后解压
root@wxxdc-app:~# cat /data/compose_lnmp/docker-compose.yml version: '3' services: nginx: hostname: nginx build: context: ./nginx dockerfile: Dockerfile ports: - 81:80 networks: - lnmp volumes: - ./wwwroot:/usr/local/nginx/html php: hostname: php build: context: ./php dockerfile: Dockerfile networks: - lnmp volumes: - ./wwwroot:/usr/local/nginx/html mysql: hostname: mysql image: mysql:5.6 ports: - 3306:3306 networks: - lnmp volumes: - ./mysql/conf:/etc/mysql/conf.d - ./mysql/data:/var/lib/mysql command: --character-set-server=utf8 environment: MYSQL_ROOT_PASSWORD: 123456 MYSQL_DATABASE: wordpress MYSQL_USER: user MYSQL_PASSWORD: user123 networks: lnmp:
配置文件常用字段:
常用命令:
docker-compose搭建java环境网站,nginx+tomcat+mysql
cat docker-compose.yml version: '3' services: nginx: hostname: nginx build: context: ./nginx dockerfile: Dockerfile ports: - 82:80 networks: - lnmt volumes: - ./webapps:/opt/webapps tomcat01: hostname: tomcat01 build: ./tomcat networks: - lnmt volumes: - /usr/local/jdk1.8.0_45:/usr/local/jdk1.8.0_45 - ./webapps:/usr/local/apache-tomcat-8.0.46/webapps tomcat02: hostname: tomcat02 build: ./tomcat networks: - lnmt volumes: - /usr/local/jdk1.8.0_45:/usr/local/jdk1.8.0_45 - ./webapps:/usr/local/apache-tomcat-8.0.46/webapps mysql: hostname: mysql image: mysql:5.6 ports: - 3307:3306 networks: - lnmt volumes: - ./mysql/conf:/etc/mysql/conf.d - ./mysql/data:/var/lib/mysql environment: MYSQL_ROOT_PASSWORD: 123456 MYSQL_DATABASE: db MYSQL_USER: user MYSQL_PASSWORD: user123 networks: lnmt:
nginx的Dockerfile
FROM centos:7 MAINTAINER www.aliangedu.com RUN yum install -y gcc gcc-c++ make openssl-devel pcre-devel ADD nginx-1.12.1.tar.gz /tmp RUN cd /tmp/nginx-1.12.1 && ./configure --prefix=/usr/local/nginx && make -j 2 && make install RUN rm -rf /tmp/nginx-1.12.1* && yum clean all COPY nginx.conf /usr/local/nginx/conf WORKDIR /usr/local/nginx EXPOSE 80 CMD ["./sbin/nginx", "-g", "daemon off;"]
nginx的配置文件
user root; worker_processes auto; error_log logs/error.log info; pid logs/nginx.pid; events { use epoll; } http { include mime.types; default_type application/octet-stream; log_format main '$remote_addr - $remote_user [$time_local] "$request" ' '$status $body_bytes_sent "$http_referer" ' '"$http_user_agent" "$http_x_forwarded_for"'; access_log logs/access.log main; sendfile on; keepalive_timeout 65; upstream www.example.com { #ip_hash; server tomcat01:8080; #可以解析容器名 server tomcat02:8080; } server { listen 80; server_name localhost; location / { proxy_pass http://www.example.com; } location ~ .(html|css|js|jpg|png|gif)$ { root /opt/webapps/ROOT; #将静态的东西用nginx来处理 } } }
tomcat的server.xml就用默认的
tomcat的Dockerfile
FROM centos:7 MAINTAINER www.aliangedu.com ENV JAVA_HOME /usr/local/jdk1.8.0_45 ADD apache-tomcat-8.0.46.tar.gz /usr/local COPY server.xml /usr/local/apache-tomcat-8.0.46/conf RUN sed -i '1a JAVA_OPTS="-Djava.security.egd=file:/dev/./urandom"' /usr/local/apache-tomcat-8.0.46/bin/catalina.sh WORKDIR /usr/local/apache-tomcat-8.0.46 EXPOSE 8080 ENTRYPOINT ["./bin/catalina.sh", "run"]
上面的sed操作为了解决容器启动tomcat慢的方法,具体的话去百度。