基于Alpine 编写Haproxy的Dockerfile_alpine 编辑 haproxy-优快云博客

本文链接：https://blog.youkuaiyun.com/Xiaoajie55/article/details/121897013

这篇博客介绍了如何利用Dockerfile从Alpine Linux为基础构建一个Haproxy镜像，包括配置安装脚本、启动脚本以及HAProxy的配置文件。通过这个镜像，可以创建一个容器来实现负载均衡，将流量分发到多个web服务器（如192.168.1.3、192.168.1.4等）。同时，还展示了如何通过Docker启动容器，并与其他web服务容器（如httpd01、nginx01）配合工作。

摘要生成于 C知道，由 DeepSeek-R1 满血版支持，前往体验 >

基于Alpine 编写Haproxy的Dockerfile

Dockerfile编写

Dockerfile文件

[root@localhost haproxy]# cat Dockerfile 
FROM alpine

ENV version 2.4.0
ENV PATH /usr/local/haproxy/sbin:$PATH

COPY files/ /tmp/
COPY entrypoint.sh /

RUN /tmp/install.sh
EXPOSE 80 8189

WORKDIR /usr/local/haproxy
ENTRYPOINT ["/entrypoint.sh"]

安装服务脚本

[root@localhost haproxy]# cat 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/
tar xf haproxy-${version}.tar.gz
cd haproxy-${version}  
make clean 
make -j $(nproc)  \
    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

mkdir  /usr/local/haproxy/conf
apk del gcc make
rm -rf /tmp/*  /var/cache/*

开启脚本

[root@localhost haproxy]# cat entrypoint.sh 
#!/bin/sh

cat > /usr/local/haproxy/conf/haproxy.cfg << EOF
#--------------全局配置----------------
global
    log 127.0.0.1 local0  info
    #log loghost local0 info
    maxconn 20480
#chroot /usr/local/haproxy
    pidfile /var/run/haproxy.pid
    #maxconn 4000
    user haproxy
    group haproxy
    daemon
#---------------------------------------------------------------------
#common defaults that all the 'listen' and 'backend' sections will
#use if not designated in their block
#---------------------------------------------------------------------
defaults
    mode http
    log global
    option dontlognull
    option httpclose
    option httplog
    #option forwardfor
    option redispatch
    balance roundrobin
    timeout connect 10s
    timeout client 10s
    timeout server 10s
    timeout check 10s
    maxconn 60000
    retries 3
#--------------统计页面配置------------------
listen admin_stats
    bind 0.0.0.0:8189
    stats enable
    mode http
    log global
    stats uri /haproxy_stats
    stats realm Haproxy\ Statistics
    stats auth admin:admin
    #stats hide-version
    stats admin if TRUE
    stats refresh 30s
#---------------web设置-----------------------
listen webcluster
    bind 0.0.0.0:80
    mode http
    #option httpchk GET /index.html
    log global
    maxconn 3000
    balance roundrobin
    cookie SESSION_COOKIE insert indirect nocache
EOF
count=1
for rs_ip in $(cat /tmp/RSs.txt);do
cat >> /usr/local/haproxy/conf/haproxy.cfg << EOF
    server web$count $rs_ip:80 check inter 2000 fall 5
EOF
let count++
done
/usr/local/haproxy/sbin/haproxy -f /usr/local/haproxy/conf/haproxy.cfg -db

用来指定RS IP的文件

[root@localhost haproxy]# cat haproxy_config/RSs.txt 
192.168.1.3
192.168.1.4
192.168.1.5
192.168.1.6

基于Dockerfile创建镜像

[root@localhost ~]# docker build -t jiejiehao/haproxy:v3 /root/haproxy/
[root@localhost ~]# docker images
REPOSITORY          TAG       IMAGE ID       CREATED          SIZE
jiejiehao/haproxy   v3        f6ad2b54e8fd   12 minutes ago   54.1MB

基于镜像开启容器

[root@localhost ~]# docker run -d --name haproxy01 -p 80:80 -p 8189:8189 -v /root/haproxy/haproxy_config:/tmp jiejiehao/haproxy:v3
3abf4b594a59934064177a8afae50c4a066052668bdd6486ce9a196524d10126
[root@localhost ~]# docker ps
CONTAINER ID   IMAGE                  COMMAND            CREATED         STATUS         PORTS                                                                          NAMES
3abf4b594a59   jiejiehao/haproxy:v3   "/entrypoint.sh"   3 seconds ago   Up 2 seconds   0.0.0.0:80->80/tcp, :::80->80/tcp, 0.0.0.0:8189->8189/tcp, :::8189->8189/tcp   haproxy01

创建用来测试的web容器

[root@localhost ~]# docker run -d --name httpd01 httpd
f887b6e2b72eb1197973a0bf42c13ef8ad362a492f5f454f2e79cbb5ded0366c
[root@localhost ~]# docker run -d --name nginx01 nginx
5a8610dc9a7c2ea7e8b012774d74f094c44a1ed9322bd5c79c48b83d9ba28302
[root@localhost ~]# docker ps 
CONTAINER ID   IMAGE                  COMMAND                  CREATED          STATUS          PORTS                                                                          NAMES
5a8610dc9a7c   nginx                  "/docker-entrypoint.…"   6 seconds ago    Up 5 seconds    80/tcp                                                                         nginx01
f887b6e2b72e   httpd                  "httpd-foreground"       17 seconds ago   Up 16 seconds   80/tcp                                                                         httpd01
3abf4b594a59   jiejiehao/haproxy:v3   "/entrypoint.sh"         2 minutes ago    Up 2 minutes    0.0.0.0:80->80/tcp, :::80->80/tcp, 0.0.0.0:8189->8189/tcp, :::8189->8189/tcp   haproxy01

访问测试

在这里插入图片描述

测试用来指定RS IP的文件是否可用

[root@localhost haproxy_config]# pwd
/root/haproxy/haproxy_config
[root@localhost haproxy_config]# ls
RSs.txt
[root@localhost haproxy_config]# vim RSs.txt 
[root@localhost haproxy_config]# cat RSs.txt 
192.168.1.3
192.168.1.4
[root@localhost haproxy_config]# docker restart haproxy01
haproxy01