单机编排之-Docker Compose

Posted 2022-03-14 小怪獣55

docker 单机编排工具：docker compose 
docker 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​​

​基础环境准备​

#python环境和Pip命令
yum install https://mirrors.aliyun.com/epel/epel-release-latest 7.noarch.rpm -y

yum install python-pip -y
pip install --upgrade pip 

#安装docker compose
pip install docker-compose 
docker-compose versin 
docker-compose --help

​docker compose启动单个容器​

mkdir docker-compose
cd docker-compose

#设置一个yml格式的配置文件,因此要注意前后的缩进 
# cat docker-compose.yml
web1:
  image: 192.168.10.206/nginx/nginx_1.10.3
  expose:
    -80
    -443
  container_ name: nginx web1 #自定义容器名称
  ports:
   -"80:80"
   -"443:443"

必须要在docker compose文件所在的目录执行
docker-compose up    #第一次启动如果本地没有镜像,会从仓库拉取镜像；前台启动
docker-compose up -d #后台启动

#查看容器进程
docker-compose ps

​docker compose启动多个容器​

# cat docker compose.yml
web1:
image: 192.168.10.206/nginx/nginx_1.10.3
  expose:
    -80
    -443
  container_name:ngix-web1 #自定义容器名称
  ports:
    -"80:80"
    -"443:443"

web2:
  image: 192.168.10.206/nginx/nginx_1.10.3
  expose:
    -80
    -443
  container_name:ngix-web2
  ports:
    -"81:80"
    -"444:443"

#重新启动容器
docker-compose stop
docker-compose up -d

​定义数据卷挂载​

mkdir -p /data/nginx
echo "Test Nginx Volume" > /data/nginx/index.html

vim docker-compose.yml 
-------------------------------------------------------------
web1:
  image: 192.168.10.206/nginx/nginx_1.10.3
  expose:
    -80
    -443
  container_name: nginx-web1
  volumes:
    -/data/nginx:/usr/local/nginx/html
  ports:
    -"80:80"
    -"443:443"

web2:
  image: 192.168.10.206/nginx/nginx_1.10.3
  expose:
    -80
    -443
  container_name: nginx-web2
  ports:
    -"81:80"
    -"444:443"
-------------------------------------------------------------
docker-compose stop
docker-compose up -d 

同一个文件,数据卷的优先级比镜像内的文件优先级高

#重启单个指定容器
docker-compose restart web1

#重启所有容器
docker-compse 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

​实现单机版的 HA+Nginx+Tomcat​

vim docker-compose.yml 
-------------------------------------------------------------
nginx-web1:
  image: 192.168.10.205/nginx/nginx_1.10.3
  expose:
    -80
    -443
  container_name: nginx-web1
  volumes:
    -/data/nginx:/usr/local/nginx/html
    -/usr/local/nginx/conf/nginx.conf:/usr/local/nginx/conf/nginx.conf
  links:
    -tomcat web1
    -tomcat web2

nginx-web2:
  image: 192.168.10.205/nginx/nginx_1.10.3
  expose:
    -80
    -443
  container_name: nginx-web2
  volumes:
    -/usr/local/nginx/conf/nginx.conf:/usr/local/nginx/conf/nginx.conf
  links:
    -tomcat web1
    -tomcat web2

tomcat-web1:
  container_name: tomcat-web1
  image: 192.168.10.205/centos/jdk1.7.0.79_tomcat1.7.0.69
  user: www
  command: /apps/tomcat/bin/run_tomcat.sh
  volumes:
    -/apps/tomcat/webapps/SalesManager:/apps/tomcat/webapps/SalesManager
  expose:
    -8080
    -8443
    
tomcat-web2:
  container_name: tomcat-web2
  image: 192.168.10.205/centos/jdk1.7.0.79_tomcat1.7.0.69
  user: www
  command: /apps/tomcat/bin/run_tomcat.sh
  volumes:
    -/apps/tomcat/webapps/SalesManager:/apps/tomcat/webapps/SalesManager
  expose:
    -8080
    -8443

haproxy:
  container_name: haproxy-web1
  image: 192.168.10.205/centos/centos_7.2.1511_haproxy_1.7.9
  command: /root/script/run_haproxy.sh
  volumes:
    -/etc/haproxy/haproxy.cfg:/etc/haproxy/haproxy.cfg
  ports:
    -"9999:9999"
    -"80:80"
  links:
    -nginx-web1
    -nginx-web2

docker-compose up -d 
docker-compose logs -f

showhost.jsp

<%@page import="java.util.Enumeration"%>
<br /
host:
<%tryout.println(""+java.net.InetAddress.getLocalHost().getHostName());catch(Exc
eption e)%>
<br />
remoteAddr: <%=request.getRemoteAddr()%>
<br />
remoteHost: <%=request.getRemoteHost()%>
<br />
sessionId: <%=request.getSession().getId()%>

<br />
serverName:<%=request.getServerName()%>
<br />
scheme:<%=request.getScheme()%>
<br />
<%request.getSession().setAttribute("t1","t2");%>


<%
Enumeration en = request.getHeaderNames();
while(en.hasMoreElements())
String hd = en.nex tElement().toString();
out.println(hd+" : "+request.getHeader(hd));
out.println("<br />");

%>

nginx配置

upstream tomcat_webserver 
  server tomcat web1:8080;
  server tomcat web2:8080;


server 
    location /SalesManager 
    proxy_pass http://tomcat_webserver;
    proxy_set_header Host $host;
    proxy_set_header X Forwarded For $proxy_add_x_forwarded_for;
    prox y_set_header X Real IP $remote_addr;