Dockerfile基于alpine构建haproxy

Dockerfile基于alpine构建haproxy

文章目录

• 结构
• 拉取镜像
• 编写Dockerfile
• 相关文件
• • 配置文件
  • 安装脚本
• 构建镜像
• 测试

结构

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

1 directory, 4 files

拉取镜像

[root@localhost ~]# docker pull alpine
Using default tag: latest
latest: Pulling from library/alpine
59bf1c3509f3: Pull complete 
Digest: sha256:21a3deaa0d32a8057914f36584b5288d2e5ecc984380bc0118285c70fa8c9300
Status: Downloaded newer image for alpine:latest
docker.io/library/alpine:latest

[root@localhost ~]# docker images
REPOSITORY   TAG       IMAGE ID       CREATED        SIZE
haproxy      v0.5      0190b2adbaac   45 hours ago   495MB
busybox      latest    ffe9d497c324   5 days ago     1.24MB
httpd        v1.0      3471d3329f64   6 days ago     721MB
nginx        latest    f652ca386ed1   10 days ago    141MB
alpine       latest    c059bfaa849c   2 weeks ago    5.59MB
centos       latest    5d0da3dc9764   2 months ago   231MB

编写Dockerfile

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

#作者信息
LABEL MAINTAINER 'lxx'

#环境变量
ENV version 2.5.0

#传输文件
ADD files/haproxy-${version}.tar.gz /tmp/
ADD files/install.sh /tmp/
ADD files/haproxycfg.sh /tmp/
#安装
RUN /tmp/install.sh

#暴露端口
EXPOSE 80 8189

#启动命令
ENTRYPOINT /tmp/haproxycfg.sh

相关文件 配置文件

//利用脚本传递变量的方式进行生成
[root@localhost ~]# cat haproxy/Dockerfile 
#基础镜像
FROM alpine

#作者信息
LABEL MAINTAINER 'lxx'

#环境变量
ENV version 2.5.0

#传输文件
ADD files/haproxy-${version}.tar.gz /tmp/
ADD files/install.sh /tmp/
ADD files/haproxycfg.sh /tmp/
#安装
RUN /tmp/install.sh

#暴露端口
EXPOSE 80 8189

#启动命令
ENTRYPOINT /tmp/haproxycfg.sh


[root@localhost ~]# cat haproxy/files/haproxycfg.sh 
#!/bin/sh
cat > /etc/haproxy/haproxy.cfg <> /etc/haproxy/haproxy.cfg < 
安装脚本 
[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 /tmp/haproxy-${version}
make TARGET=linux-musl USE_OPENSSL=1 USE_ZLIB=1 USE_PCRE=1 
make install PREFIX=/usr/local/haproxy
echo 'net.ipv4.ip_nonlocal_bind = 1' >>  /etc/sysctl.conf 
echo 'net.ipv4.ip_forward = 1' >> /etc/sysctl.conf
cp haproxy  /usr/sbin/
mkdir /etc/haproxy
apk del gcc make
rm -rf /tmp/haproxy-2.5.0/ /tmp/install.sh
 
构建镜像 
[root@localhost ~]# docker build -t haproxy:alpine haproxy/
Sending build context to Docker daemon  3.811MB
Step 1/7 : FROM alpine
 ---> c059bfaa849c
Step 2/7 : LABEL MAINTAINER 'lxx'
 ---> Using cache
 ---> 48c0ed157160
Step 3/7 : ENV VERSION 2.5.0
 ---> Using cache
 ---> 192037a94321
Step 4/7 : ADD files  /tmp/
 ---> 4f7b431d675b
Step 5/7 : RUN /tmp/install.sh
...略
OK: 35 MiB in 45 packages
Removing intermediate container 1c3be38bebd7
 ---> c3b767a99948
Step 6/7 : EXPOSE 80 8189
 ---> Running in 3b70ad06302f
Removing intermediate container 3b70ad06302f
 ---> c2a90a72f583
Step 7/7 : ENTRYPOINT /tmp/haproxycfg.sh
 ---> Running in ca8e1f33e965
Removing intermediate container ca8e1f33e965
 ---> 86f0df80b75e
Successfully built 86f0df80b75e
Successfully tagged haproxy:alpine
 
测试 
//启2个上篇文章的httpd容器
[root@localhost ~]# docker start 3b9401d15c79 
3b9401d15c79
[root@localhost ~]# docker start c72fd66f9fe7
c72fd66f9fe7
[root@localhost ~]# docker ps -a
CONTAINER ID   IMAGE        COMMAND               CREATED        STATUS          PORTS                               NAMES
3b9401d15c79   httpd:v1.0   "/scripts/start.sh"   45 hours ago   Up 11 seconds   0.0.0.0:82->80/tcp, :::82->80/tcp   web2
c72fd66f9fe7   httpd:v1.0   "/scripts/start.sh"   45 hours ago   Up 3 seconds                                        web1

[root@localhost ~]# docker inspect  web1
//查看ip
...略
Gateway": "172.17.0.1",
                    "IPAddress": "172.17.0.3",
                    "IPPrefixLen": 16,
                    "IPv6Gateway": "",
                    "GlobalIPv6Address": "",
                    "GlobalIPv6PrefixLen": 0,
                    "MacAddress": "02:42:ac:11:00:03",
                    "DriverOpts": null
...

//启动容器传递ip，映射80端口
[root@localhost ~]# docker run -itd --name haproxy-1 -p 80:80 -e RSs="172.17.0.3 172.17.0.2" haproxy:alpine
 

 
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