用Dockerfile方式使用alpine系统制作haproxy镜像

• Dockerfile目录结构
• 编写Dockerfile
• 提供Dockerfile所需的文件
• • 安装脚本
  • 启动脚本
• 构建haproxy镜像
• 创建RS文件
• 基于新镜像创建haproxy容器
• 访问测试

[root@localhost ~]# tree haproxy/
haproxy/
├── Dockerfile
└── files
    ├── haproxy-2.5.0.tar.gz
    ├── install.sh
    ├── start.sh
    └── sysctl.conf

1 directory, 5 files

[root@localhost ~]# cat haproxy/Dockerfile 
#基础镜像
FROM alpine

#作者信息
LABEL MAINTAINER wjj200112 1234567890@qq.com

#环境变量
ENV version 2.5.0

#传输文件
ADD files/haproxy-${version}.tar.gz /usr/src
ADD files/install.sh /tmp/

#安装
RUN ["/bin/bash","-c","/tmp/install.sh"]    

ENTRYPOINT /tmp/haproxy.sh
[root@localhost ~]# vim haproxy/Dockerfile 
[root@localhost ~]# cat haproxy/Dockerfile 
#基础镜像
FROM alpine

#作者信息
LABEL MAINTAINER wjj200112 1234567890@qq.com

#环境变量
ENV version 2.5.0

#传输文件
ADD files/haproxy-${version}.tar.gz /usr/src
ADD files/install.sh /scripts/
ADD files/start.sh /scripts/
ADD files/sysctl.conf /scripts/

#安装
RUN /scripts/install.sh    

#暴露端口
EXPOSE 80 8189

#启动命令
CMD /scripts/start.sh

[root@localhost ~]# cat haproxy/files/install.sh 
#!/bin/sh
sed -i 's/dl-cdn.alpinelinux.org/mirrors.aliyun.com/' /etc/apk/repositories
apk update
adduser -S -H -s /sbin/nologin haproxy
addgroup haproxy
apk add --no-cache -U make gcc pcre-dev bzip2-dev openssl-dev elogind-dev libc-dev dahdi-tools dahdi-tools-dev libexecinfo libexecinfo-dev ncurses-dev zlib-dev zlib

cd /usr/src/haproxy-${version}
make TARGET=linux-musl USE_OPENSSL=1 USE_ZLIB=1 USE_PCRE=1 
make install PREFIX=/usr/local/haproxy
cp haproxy /usr/sbin/
mkdir -p /usr/local/haproxy/conf/

apk del gcc make
rm -rf /usr/src/haproxy-${version} /var/cache/*

[root@localhost ~]# cat haproxy/files/start.sh 
#!/bin/sh

cat > /usr/local/haproxy/conf/haproxy.cfg  <> /usr/local/haproxy/conf/haproxy.cfg  < 
构建haproxy镜像 
[root@localhost ~]# docker build -t haproxy:v0.2 haproxy/
Sending build context to Docker daemon  3.812MB
Step 1/10 : FROM alpine
 ---> c059bfaa849c
Step 2/10 : LABEL MAINTAINER wjj200112 1234567890@qq.com
 ---> Using cache
 ---> 895c9a229550
Step 3/10 : ENV version 2.5.0
 ---> Using cache
 ---> b0acbcf67d13
Step 4/10 : ADD files/haproxy-${version}.tar.gz /usr/src
 ---> Using cache
 ---> be9133f11324
Step 5/10 : ADD files/install.sh /scripts/
 ---> Using cache
 ---> 9f7dad6ec8fc
Step 6/10 : ADD files/start.sh /scripts/
 ---> Using cache
 ---> b1c30a0fff5d
Step 7/10 : ADD files/sysctl.conf /scripts/
 ---> Using cache
 ---> 5da396d055b7
Step 8/10 : RUN /scripts/install.sh
 ---> Using cache
 ---> d0b711f373a5
Step 9/10 : EXPOSE 80 8189
 ---> Using cache
 ---> fd2d46ebc681
Step 10/10 : CMD /scripts/start.sh
 ---> Using cache
 ---> 78f79b448d6a
Successfully built 78f79b448d6a
Successfully tagged haproxy:v0.2

[root@localhost ~]# docker images
REPOSITORY   TAG       IMAGE ID       CREATED          SIZE
haproxy      v0.2      78f79b448d6a   13 minutes ago   82.9MB
 
创建RS文件 
[root@localhost ~]# mkdir RS
[root@localhost ~]# touch RS.txt 
[root@localhost ~]# vim RS.txt 
172.17.0.2
172.17.0.3
 
基于新镜像创建haproxy容器 
[root@localhost ~]# docker run  --name haproxy -dit -p 80:80 -p 8189:8189 -v /RS:/RS haproxy:v0.2
ff034ca5c1a5f9d9e5dba90a0c8d4272d4f2931a9774a06282f5402156955137
[root@localhost ~]# docker ps
ConTAINER ID   IMAGE          COMMAND                  CREATED          STATUS          PORTS                                                                          NAMES
ff034ca5c1a5   haproxy:v0.2   "/bin/sh -c /scripts…"   13 seconds ago   Up 12 seconds   0.0.0.0:80->80/tcp, :::80->80/tcp, 0.0.0.0:8189->8189/tcp, :::8189->8189/tcp   haproxy
[root@localhost ~]# docker exec  -it haproxy /bin/sh
/ # apk add iproute2
/ # ss -antl
State  Recv-Q Send-Q Local Address:Port   Peer Address:Port Process 
LISTEN 0      128          0.0.0.0:8189        0.0.0.0:*            
LISTEN 0      128          0.0.0.0:80          0.0.0.0:*          
 
访问测试