Dockerfile基于alpine构建haproxy镜像

编写dockerfile文件

[root@JLIN docker]# vim haproxy/Dockerfile 
FROM alpine
LABEL MAINTAINER='ioin17@163.com'

ENV version 2.4.9
ENV PATH /usr/local/harpoxy/sbin:$PATH

ADD files/haproxy-${version}.tar.gz /tmp/
ADD files/install.sh /tmp/
COPY files/entrypoint.sh /

RUN /tmp/install.sh

EXPOSE 80 8189
ENTRYPOINT ["/entrypoint.sh"]

编写安装脚本

[root@JLIN docker]# 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
apk del gcc make
mkdir /usr/local/haproxy/conf
rm -rf  /tmp/install.sh

编写启动脚本

[root@JLIN ~]# vim /docker/haproxy/files/entrypoint.sh
#!/bin/sh

cat > /usr/local/haproxy/conf/haproxy.cfg <> /usr/local/haproxy/conf/haproxy.cfg << EOF
    server web$count $rs:80 check inter 2000 fall 5
EOF
let count++
done
/usr/local/haproxy/sbin/haproxy -f /usr/local/haproxy/conf/haproxy.cfg -db

构建镜像

[root@JLIN docker]# docker build -t haproxy:v1.0 haproxy

启动web容器
[root@JLIN ~]# docker run -d --name web1 --rm jlin17/httpd:latest
40c68ee9a82f399556ce7a354594ccab50af4116870e584c28e79eff5074d3d6
[root@JLIN ~]# docker run -d --name web2 --rm jlin17/httpd:latest
27552ce99f05ddefafd0f3471f6a104c357b4d27fb77427670af6a38600f69fb
[root@JLIN ~]# cat /docker/haproxy/conf/RSS
172.17.0.2
172.17.0.3

启动haproxy容器
```shell
[root@JLIN ~]# docker run -it --name test1 -p 80:80 -v /docker/haproxy/conf:/tmp haproxy:v1.0