【Docker】Docker学习⑨ - 单机编排之Docker Compose
【Docker】Docker学习⑨ - 单机编排之Docker Compose
- 一、Docker简介
- 二、Docker安装及基础命令介绍
- 三、Docker镜像管理
- 四、Docker镜像与制作
- 五、Docker数据管理
- 六、网络部分
- 七、Docker仓库之单机Dokcer Registry
- 八、Docker仓库之分布式Harbor
- 九、单机编排之Docker Compose
- 1 基础环境准备
- 2 从docker compose启动单个容器
- 3 从docker compose启动多个容器
- 4 定义数据卷挂载
- 5 实现单机版的HA+NGINX+TOMCAT
- 5.1 制作haproxy镜像
- 5.2 准备nginx镜像
- 5.3 准备tomcat镜像
- 5.4 编辑docker compose 文件及环境准备
- 5.5 启动容器
一、Docker简介
- 参考：【Docker】Dokcer学习① - 简介
二、Docker安装及基础命令介绍
- 参考：【Docker】Docker学习② - Docker安装及基础命令介绍
三、Docker镜像管理
- 参考：【Docker】Docker学习③ - Docker镜像管理
四、Docker镜像与制作
- 参考：【Docker】Docker学习④ - Docker镜像与制作
五、Docker数据管理
- 参考：【Docker】Docker学习⑤ - Docker数据管理
六、网络部分
- 参考：【Docker】Docker学习⑥ - 网络部分
七、Docker仓库之单机Dokcer Registry
- 参考：【Docker】Docker学习⑦ - Docker仓库之单机Dokcer Registry
八、Docker仓库之分布式Harbor
- 参考：【Docker】Docker学习⑧ - Docker仓库之分布式Harbor
九、单机编排之Docker Compose
当在宿主机启动较多的容器的时候，如果都是手动操作会觉得比较麻烦而且容易出错，这个时候推荐使用docker单机编排工具docker compose，Dokcer Compose是docker容器的一种编排服务，docker compose是一个管理多个容器的工具，比如可以解决容器之间的依赖关系，就像启动一个web就必须得先把数据库服务先启动一样，docker compose完全可以替代docker run启动容器。
- github地址：https://github.com/docker/compose
1 基础环境准备
- 1.1 安装python环境及pip命令
yum install https://mirrors.aliyun.com/epel/epel-release-latest-7.noarch.rpm -yyum install python-pip -ypip install --upgrade pip
- 1.2 安装docker compose
pip install docker-compose
- 1.3 验证版本
docker-compose version
日志：
[root@gbase8c_private ~]# docker-compose version/usr/lib/python2.7/site-packages/paramiko/transport.py:33: CryptographyDeprecationWarning: Python 2 is no longer supported by the Python core team. Support for it is now deprecated in cryptography, and will be removed in the next release.from cryptography.hazmat.backends import default_backenddocker-compose version 1.26.2, build unknowndocker-py version: 4.4.4CPython version: 2.7.5OpenSSL version: OpenSSL 1.0.2k-fips 26 Jan 2017
- 1.4 查看帮助
docker-compose --help[root@gbase8c_private ~]# docker-compose --help/usr/lib/python2.7/site-packages/paramiko/transport.py:33: CryptographyDeprecationWarning: Python 2 is no longer supported by the Python core team. Support for it is now deprecated in cryptography, and will be removed in the next release.from cryptography.hazmat.backends import default_backendDefine and run multi-container applications with Docker.Usage:docker-compose [-f <arg>...] [options] [COMMAND] [ARGS...]docker-compose -h|--helpOptions:-f, --file FILE Specify an alternate compose file(default: docker-compose.yml)-p, --project-name NAME Specify an alternate project name(default: directory name)-c, --context NAME Specify a context name--verbose Show more output--log-level LEVEL Set log level (DEBUG, INFO, WARNING, ERROR, CRITICAL)--no-ansi Do not print ANSI control characters-v, --version Print version and exit-H, --host HOST Daemon socket to connect to--tls Use TLS; implied by --tlsverify--tlscacert CA_PATH Trust certs signed only by this CA--tlscert CLIENT_CERT_PATH Path to TLS certificate file--tlskey TLS_KEY_PATH Path to TLS key file--tlsverify Use TLS and verify the remote--skip-hostname-check Don't check the daemon's hostname against thename specified in the client certificate--project-directory PATH Specify an alternate working directory(default: the path of the Compose file)--compatibility If set, Compose will attempt to convert keysin v3 files to their non-Swarm equivalent--env-file PATH Specify an alternate environment fileCommands:build Build or rebuild servicesconfig Validate and view the Compose filecreate Create servicesdown Stop and remove containers, networks, images, and volumesevents Receive real time events from containersexec Execute a command in a running containerhelp Get help on a commandimages List imageskill Kill containerslogs View output from containerspause Pause servicesport Print the public port for a port bindingps List containerspull Pull service imagespush Push service imagesrestart Restart servicesrm Remove stopped containersrun Run a one-off commandscale Set number of containers for a servicestart Start servicesstop Stop servicestop Display the running processesunpause Unpause servicesup Create and start containersversion Show the Docker-Compose version information
2 从docker compose启动单个容器
目录可以在任意目录，推荐放在有意义的位置（/usr/local/docker-compos）
- 2.1 一个容器的docker compose文件
设置一个yml格式的配置文件，因此要注意前后缩进
vim /usr/local/docker-compos/docker-compose.yml[root@gbase8c_private docker-compose]# cat docker-compose.yml web1:image: 192.168.56.199/nginx/nginx:v1expose:- 80- 443ports:- "80:80"- "443:443"
- 2.2 启动容器
必须要在docker compose文件所在的目录执行：
docker-compose up #前台启动[root@gbase8c_private docker-compose]# docker-compose up/usr/lib/python2.7/site-packages/paramiko/transport.py:33: CryptographyDeprecationWarning: Python 2 is no longer supported by the Python core team. Support for it is now deprecated in cryptography, and will be removed in the next release.from cryptography.hazmat.backends import default_backendCreating docker-compose_web1_1 ... doneAttaching to docker-compose_web1_1web1_1 | /docker-entrypoint.sh: /docker-entrypoint.d/ is not empty, will attempt to perform configurationweb1_1 | /docker-entrypoint.sh: Looking for shell scripts in /docker-entrypoint.d/web1_1 | /docker-entrypoint.sh: Launching /docker-entrypoint.d/10-listen-on-ipv6-by-default.shweb1_1 | 10-listen-on-ipv6-by-default.sh: info: Getting the checksum of /etc/nginx/conf.d/default.confweb1_1 | 10-listen-on-ipv6-by-default.sh: info: Enabled listen on IPv6 in /etc/nginx/conf.d/default.confweb1_1 | /docker-entrypoint.sh: Launching /docker-entrypoint.d/20-envsubst-on-templates.shweb1_1 | /docker-entrypoint.sh: Launching /docker-entrypoint.d/30-tune-worker-processes.shweb1_1 | /docker-entrypoint.sh: Configuration complete; ready for start upweb1_1 | 2023/12/17 14:41:21 [notice] 1#1: using the "epoll" event methodweb1_1 | 2023/12/17 14:41:21 [notice] 1#1: nginx/1.21.5web1_1 | 2023/12/17 14:41:21 [notice] 1#1: built by gcc 10.2.1 20210110 (Debian 10.2.1-6) web1_1 | 2023/12/17 14:41:21 [notice] 1#1: OS: Linux 3.10.0-1160.71.1.el7.x86_64web1_1 | 2023/12/17 14:41:21 [notice] 1#1: getrlimit(RLIMIT_NOFILE): 1048576:1048576web1_1 | 2023/12/17 14:41:21 [notice] 1#1: start worker processesweb1_1 | 2023/12/17 14:41:21 [notice] 1#1: start worker process 29web1_1 | 2023/12/17 14:41:21 [notice] 1#1: start worker process 30^CGracefully stopping... (press Ctrl+C again to force)Stopping docker-compose_web1_1 ... done
- 2.3 web访问测试
- 2.4 后台启动服务
容器在启动的时候，会给容器自定义一个名称
docker-compose up -d
日志：
[root@gbase8c_private docker-compose]# docker-compose up -dStarting docker-compose_web1_1 ... done #容器名称
- 2.5 自定义容器名称
[root@gbase8c_private docker-compose]# cat docker-compose.yml
web1:image: 192.168.56.199/nginx/nginx:v1expose:- 80- 443container_name: nginx-web1 #自定义容器名称ports:- "80:80"- "443:443"
日志：
[root@gbase8c_private docker-compose]# docker-compose stopStopping docker-compose_web1_1 ... done[root@gbase8c_private docker-compose]# docker ps -aCONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES72aed697d033 192.168.56.199/nginx/nginx:v1 "/docker-entrypoint.…" 9 minutes ago Exited (0) 13 seconds ago docker-compose_web1_1[root@gbase8c_private docker-compose]# docker-compose up -dRecreating docker-compose_web1_1 ... done[root@gbase8c_private docker-compose]# docker ps -aCONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMESf1033c073624 192.168.56.199/nginx/nginx:v1 "/docker-entrypoint.…" 2 seconds ago Up 2 seconds 0.0.0.0:80->80/tcp, 0.0.0.0:443->443/tcp nginx-web1[root@gbase8c_private docker-compose]#
3 从docker compose启动多个容器
- 3.1 编辑docker-compose文件
cat docker-compose.yml
web1:image: 192.168.56.199/nginx/nginx:v1expose:- 80- 443container_name: nginx-web1 ports:- "80:80"- "443:443"
web2: #每个容器一个IDimage: 192.168.56.199/nginx/nginx:v1expose:- 80- 443container_name: nginx-web2 ports:- "81:80"- "444:443"
日志：
[root@gbase8c_private docker-compose]# docker-compose stopStopping nginx-web1 ... done[root@gbase8c_private docker-compose]# docker ps -aCONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMESf1033c073624 192.168.56.199/nginx/nginx:v1 "/docker-entrypoint.…" 5 minutes ago Exited (0) 6 seconds ago nginx-web1[root@gbase8c_private docker-compose]# docker-compose up -dStarting nginx-web1 ... doneCreating nginx-web2 ... done[root@gbase8c_private docker-compose]# docker psCONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES341ed2cbd17d 192.168.56.199/nginx/nginx:v1 "/docker-entrypoint.…" 51 seconds ago Up 50 seconds 0.0.0.0:81->80/tcp, 0.0.0.0:444->443/tcp nginx-web2f1033c073624 192.168.56.199/nginx/nginx:v1 "/docker-entrypoint.…" 6 minutes ago Up 50 seconds 0.0.0.0:80->80/tcp, 0.0.0.0:443->443/tcp nginx-web1
- 3.2 web访问测试
4 定义数据卷挂载
- 4.1 创建数据目录和文件
mkdir -p /data/nginx
echo "Test Nginx Volume" > /data/nginx/index.html
- 4.2 编辑compose配置文件
cat docker-compose.yml
web1:image: jack/nginx-1.22.1:v1expose:- 80- 443container_name: nginx-web1 volumes:- /data/nginx:/usr/local/nginx/htmlports:- "80:80"- "443:443"
web2: #每个容器一个IDimage: jack/nginx-1.22.1:v1expose:- 80- 443container_name: nginx-web2 ports:- "81:80"- "444:443"
- 4.3 重启容器
docker-compose stop
docker-compose up -d
-
4.4 登录验证Web访问
-
4.5 其他常用命令
##重启单个指定容器
docker-compose restart web1
##重启所有容器
docker-compose restart
##停止和启动单个容器
docker-compose stop web1
docker-compose start web1
##停止和启动所有容器
docker-compose stop
docker-compose start
5 实现单机版的HA+NGINX+TOMCAT
5.1 制作haproxy镜像
- 5.1.1 编辑Dockerfile文件
cd /opt/dockerfile/web/haproxy
cat Dockerfile
#My Dockerfile
From docker.io/centos:latest
MAINTAINER chengk "123@123.com"#Yum Setting
RUN rpm -ivh http://mirrors.aliyun.com/epel/epel-release-latest-8.noarch.rpm
#以下为centos8需要
RUN sed -i -e "s|mirrorlist=|#mirrorlist=|g" /etc/yum.repos.d/CentOS-*
RUN sed -i -e "s|#baseurl=http://mirror.centos.org|baseurl=http://vault.centos.org|g" /etc/yum.repos.d/CentOS-*RUN yum install gcc gcc-c++ pcre pcre-devel openssl openssl-devel make vim wget tree lrzsz automake zlib zlib-devel iproute net-tools iotop -y
ADD haproxy-1.8.31.tar.gz /usr/local/src/
RUN cd /usr/local/src/haproxy-1.8.31 && make TARGET=linux2628 USE_PCRE=1 USE_OPENSSL=1 USE_ZLIB=1 PREFIX=/usr/local/haproxy && make install PREFIX=/usr/local/haproxy
RUN cp /usr/local/src/haproxy-1.8.31/examples/haproxy.init /etc/init.d/haproxy
RUN cp /usr/local/src/haproxy-1.8.31/haproxy /usr/sbin/haproxy
ADD haproxy.service /usr/lib/systemd/system/haproxy.service
ADD haproxy /etc/sysconfig/haproxy
ADD run_haproxy.sh /root/script/run_haproxy.sh
ADD haproxy.cfg /etc/haproxy/haproxy.cfg
RUN chmod a+x /root/script/run_haproxy.shCMD ["/root/script/run_haproxy.sh"]
EXPOSE 80 9999
- 5.1.2 准备服务启动脚本
cat haproxy.service
[Unit]
Description=HAProxy Load Balancer
After=syslog.target network.target
SourcePath=/etc/init.d/haproxy
[Service]
EnvironmentFile=/etc/sysconfig/haproxy
ExecStart=/etc/init.d/haproxy start
ExecStop=/etc/init.d/haproxy stop
ExecReload=/etc/init.d/haproxy reload[Install]
WantedBy=multi-user.target
- 5.1.3 前台启动脚本
cat run_haproxy.sh
#!/bin/bash
/usr/sbin/haproxy -f /etc/haproxy/haproxy.cfg -p /run/haproxy.pid
tail -f /etc/hosts
- 5.1.4 haproxy参数文件
cat haproxy
OPTIONS=""
- 5.1.5 准备压缩包及其他文件
-rw-r--r-- 1 root root 858 1月 19 20:04 Dockerfile
-rw-r--r-- 1 root root 301 1月 19 20:05 haproxy.service
-rw-r--r-- 1 root root 94 1月 19 20:05 run_haproxy.sh
-rw-r--r-- 1 root root 11 1月 19 20:05 haproxy
-rw-r--r-- 1 root root 2523 1月 19 20:06 CentOS-Base.repo
-rw-r--r-- 1 root root 951 1月 19 20:06 epel.repo
-rw-r--r-- 1 root root 2219503 1月 19 20:07 haproxy-1.8.31.tar.gz
- 5.1.6 执行构建镜像
docker build -t 192.168.56.199/centos/centos_haproxy_1.8.31 /opt/dockerfile/web/haproxy/
docker rm -f `docker ps -a -q`
docker rmi 192.168.56.199/centos/centos_haproxy_1.8.31:v1
docker tag 192.168.56.199/centos/centos_haproxy_1.8.31:latest 192.168.56.199/centos/centos_haproxy_1.8.31:v1
5.2 准备nginx镜像
5.3 准备tomcat镜像
5.4 编辑docker compose 文件及环境准备
- 5.4.1 编辑docker compose文件
cat docker-compose.yml
nginx-web1:image: jack/nginx-1.22.1:v1expose:- 80- 443container_name: nginx-web1 volumes:- /data/nginx:/usr/local/nginx/html- /usr/local/nginx/conf/nginx.conf:/usr/local/nginx/conf/nginx.conflinks:- tomcat-web1- tomcat-web2
nginx-web2: image: jack/nginx-1.22.1:v1expose:- 80- 443container_name: nginx-web2 volumes:- /usr/local/nginx/conf/nginx.conf:/usr/local/nginx/conf/nginx.conflinks:- tomcat-web1- tomcat-web2
tomcat-web1:container_name: tomcat-web1image: tomcat-web:app1user: rootcommand: /apps/tomcat/bin/run_tomcat.shvolumes: - /apps/tomcat/webapps/SalesManager:/apps/tomcat/webapps/SalesManagerexpose:- 8080- 8443
tomcat-web2:container_name: tomcat-web2image: tomcat-web:app1user: rootcommand: /apps/tomcat/bin/run_tomcat.shvolumes: - /apps/tomcat/webapps/SalesManager:/apps/tomcat/webapps/SalesManagerexpose:- 8080- 8443
haproxy-web1:container_name: haproxy-web1image: 192.168.56.199/centos/centos_haproxy_1.8.31:v1command: /root/script/run_haproxy.shvolumes:- /etc/haproxy/haproxy.cfg:/etc/haproxy/haproxy.cfgports:- "9999:9999"- "80:80"links:- nginx-web1- nginx-web2
- 5.4.2 准备nginx静态页面
cat /data/nginx/index.html
Test Nginx Volme
- 5.4.3 准备nginx 配置文件
#本地路径和nginx路径都是/usr/local/nginx/conf/nginx.conf
grep -v "#" /usr/local/nginx/conf/nginx.conf
user nginx;
worker_processes auto;
daemon off;
events {worker_connections 1024;
}
http {include mime.types;default_type application/octet-stream;sendfile on;keepalive_timeout 65;upstream tomcat_webserver{server tomcat-web1:8080;server tomcat-web2:8080;}server {listen 80;server_name localhost;location / {root html;index index.html index.htm;}location /SalesManager {proxy_pass http://tomcat_webserver;proxy_set_header Host $host;proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;proxy_set_header X-Real-IP $remote_addr; }error_page 500 502 503 504 /50x.html;location = /50x.html {root html;}}
}
- 5.4.4 准备tomcat页面文件
ll /apps/tomcat/webapps/SalesManager
cat /apps/tomcat/webapps/SalesManager/showhost.jsp
<%@page import="java.util.Enumeration"%>
<br />
host:<%try{out.println(""+java.net.InetAddress.getLocalHost().getHostName());}catch(Exception e){}%>
<br />
<%request.getSession().setAttribute("t1","t2");%>
<%Enumeration en = request.getHeaderNames();while(en.hasMoreElements()){String hd = en.nextElement().toString();out.println(hd+":"+request.getHeader(hd));out.println("<br />");}%>
5.5 启动容器
日志：
[root@gbase8c_private docker-compose]# docker-compose up -d/usr/lib/python2.7/site-packages/paramiko/transport.py:33: CryptographyDeprecationWarning: Python 2 is no longer supported by the Python core team. Support for it is now deprecated in cryptography, and will be removed in the next release.from cryptography.hazmat.backends import default_backendCreating tomcat-web1 ... doneCreating tomcat-web2 ... doneCreating nginx-web2 ... doneCreating nginx-web1 ... doneCreating haproxy-web1 ... done[root@gbase8c_private docker-compose]# docker ps -aCONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES679cadcf5244 192.168.56.199/centos/centos_haproxy_1.8.31:v1 "/root/script/run_ha…" 5 seconds ago Up 4 seconds 0.0.0.0:80->80/tcp, 0.0.0.0:9999->9999/tcp haproxy-web1d7bd6746c7ee jack/nginx-1.22.1:v1 "nginx" 6 seconds ago Up 4 seconds 80/tcp, 443/tcp nginx-web1fb3df1f58075 jack/nginx-1.22.1:v1 "nginx" 6 seconds ago Up 4 seconds 80/tcp, 443/tcp nginx-web2f0d87107431b tomcat-web:app1 "/apps/tomcat/bin/ru…" 7 seconds ago Up 5 seconds 8009/tcp, 8080/tcp, 8443/tcp tomcat-web26424d08ff212 tomcat-web:app1 "/apps/tomcat/bin/ru…" 7 seconds ago Up 5 seconds 8009/tcp, 8080/tcp, 8443/tcp tomcat-web1[root@gbase8c_private docker-compose]# docker-compose logs -f/usr/lib/python2.7/site-packages/paramiko/transport.py:33: CryptographyDeprecationWarning: Python 2 is no longer supported by the Python core team. Support for it is now deprecated in cryptography, and will be removed in the next release.from cryptography.hazmat.backends import default_backendAttaching to haproxy-web1, nginx-web1, nginx-web2, tomcat-web2, tomcat-web1tomcat-web1 | Tomcat started.tomcat-web1 | 127.0.0.1 localhosttomcat-web1 | ::1 localhost ip6-localhost ip6-loopbacktomcat-web1 | fe00::0 ip6-localnettomcat-web1 | ff00::0 ip6-mcastprefixtomcat-web1 | ff02::1 ip6-allnodestomcat-web1 | ff02::2 ip6-allrouterstomcat-web1 | 10.10.0.2 6424d08ff212tomcat-web1 | 1.1.1.1 abc.test.comhaproxy-web1 | 127.0.0.1 localhosthaproxy-web1 | ::1 localhost ip6-localhost ip6-loopbackhaproxy-web1 | fe00::0 ip6-localnethaproxy-web1 | ff00::0 ip6-mcastprefixtomcat-web2 | Tomcat started.haproxy-web1 | ff02::1 ip6-allnodeshaproxy-web1 | ff02::2 ip6-allrouterstomcat-web2 | 127.0.0.1 localhosthaproxy-web1 | 10.10.0.5 nginx-web1 d7bd6746c7eehaproxy-web1 | 10.10.0.4 nginx-web2 fb3df1f58075haproxy-web1 | 10.10.0.6 679cadcf5244tomcat-web2 | ::1 localhost ip6-localhost ip6-loopbacktomcat-web2 | fe00::0 ip6-localnettomcat-web2 | ff00::0 ip6-mcastprefixtomcat-web2 | ff02::1 ip6-allnodestomcat-web2 | ff02::2 ip6-allrouterstomcat-web2 | 10.10.0.3 f0d87107431btomcat-web2 | 1.1.1.1 abc.test.com