Docker-Haproxy构建镜像

阅读目录(Content)

• 1、需求
• 2、编写Dockerfile
• 2.1、创建Dockerfile专用目录
• 2.2、下载软件包
• 2.3、定制配置文件haproxy.cfg
• 2.4、编写haproxy运行脚本
• 2.5、定制Dockerfile
• 2.6、构建镜像
• 3、使用新镜像启动一个容器，查看效果
• 3.1、启动容器
• 3.2、查看运行状态
• 3.3、访问测试
• 3.4、查看健康检查状态

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1、需求

基于基础的 tomcat镜像，运行两个专用的tomcat项目，使用haproxy代理webapp1,webapp2的项目

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2、编写Dockerfile

2.1、创建Dockerfile专用目录

mkdir /docker/images/haproxy -p && cd /docker/images/haproxy

2.2、下载软件包

curl -O https://www.haproxy.org/download/2.4/src/haproxy-2.4.2.tar.gz

2.3、定制配置文件haproxy.cfg

cat << 'CAT_END' > haproxy.cfg
global
       chroot /usr/local/haproxy/
       maxconn 4096
       uid 99
       gid 99
       daemon
       nbproc 1
       pidfile /usr/local/haproxy/haproxy.pid
       log 127.0.0.1 local3 info
defaults
       log global
       mode   http
       option http-keep-alive
       option forwardfor
       retries 3
       maxconn 4096
       timeout connect 120s
       timeout client 120s
       timeout server 120s
        
listen status
       bind 0.0.0.0:9999
       mode http
       log global
       stats enable
       stats uri /haproxy-stats
       stats auth haadmin:123456
listen web_port
       bind 0.0.0.0:80
       mode http
       log global
       balance roundrobin
       server web1 192.168.10.19:8080 check inter 2000 fall 3 rise 5
       server web2 192.168.10.19:8081 check inter 2000 fall 3 rise 5
CAT_END

2.4、编写haproxy运行脚本

cat << 'CAT_END' > entrypoint.sh
!/bin/bash
/usr/local/haproxy/sbin/haproxy -f /etc/haproxy/haproxy.cfg
tail -f /etc/hosts
CAT_END

2.5、定制Dockerfile

cat << 'CAT_END' > Dockerfile
FROM ubuntu:latest
MAINTAINER cyc author

ADD haproxy-2.4.2.tar.gz /usr/local/src

RUN apt-get update && apt install make gcc build-essential libssl-dev zlib1g-dev libpcre3 libpcre3-dev libsystemd-dev libreadline-dev -y && \
cd /usr/local/src/haproxy-2.4.2 && \
make ARCH=x86_64 TARGET=linux-glibc USE_PCRE=1 USE_OPENSSL=1 USE_ZLIB=1 USE_SYSTEMD=1 USE_CPU_AFFINITY=1 \
PREFIX=/usr/local/haproxy-2.4.2 && make install PREFIX=/usr/local/haproxy-2.4.2 && \
ln -s /usr/local/haproxy-2.4.2 /usr/local/haproxy && rm -rf /usr/local/src/haproxy* && \
apt-get autoclean && apt-get clean && apt-get autoremove

ADD haproxy.cfg /etc/haproxy/haproxy.cfg
ADD entrypoint.sh /root/entrypoint.sh

EXPOSE 80 9999

CMD ["bash","/root/entrypoint.sh"]
CAT_END

2.6、构建镜像

docker build -t haproxy:v2.4.2 .

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3、使用新镜像启动一个容器，查看效果

3.1、启动容器

docker run -d -p 80:80 -p 9999:9999 haproxy:v2.4.2 

3.2、查看运行状态

]# docker ps
CONTAINER ID   IMAGE                 COMMAND                   CREATED              STATUS              PORTS                                                                          NAMES
0a58f3a11f30   haproxy:v2.4.2        "bash /root/entrypoi…"   About a minute ago   Up About a minute   0.0.0.0:80->80/tcp, :::80->80/tcp, 0.0.0.0:9999->9999/tcp, :::9999->9999/tcp   sweet_dijkstra
b35d16d291e6   tomcat-webapp2:v0.1   "bash /root/entrypoi…"   47 minutes ago       Up 47 minutes       0.0.0.0:8081->8080/tcp, :::8081->8080/tcp                                      agitated_blackburn
be6fb6f5c9fe   tomcat-webapp1:v0.1   "bash /root/entrypoi…"   54 minutes ago       Up 54 minutes       0.0.0.0:8080->8080/tcp, :::8080->8080/tcp                                      pensive_rhodes

3.3、访问测试

3.4、查看健康检查状态