dockerfile构建haproxy镜像

最新推荐文章于 2022-03-29 10:45:33 发布

linlusama

最新推荐文章于 2022-03-29 10:45:33 发布

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分类专栏： docker 文章标签： bash linux docker

本文链接：https://blog.youkuaiyun.com/weixin_46634416/article/details/121893764

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本文详细介绍了如何使用Dockerfile构建一个基于Alpine的HAProxy镜像，包括配置文件编写、依赖安装、镜像制作，并展示了通过环境变量动态配置服务器实例的过程。通过示例，读者可以学习如何利用Docker进行高效的服务部署和管理。

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dockerfile构建haproxy镜像

结构

[root@docker haproxy]# tree 
.
├── dockerfile
├── entrypoint.sh
└── file
    ├── entrypoint.sh
    ├── haproxy-2.4.0.tar.gz
    └── install.sh

//创建dockerfile存放目录
[root@docker ~]# mkdir -p /haproxy/file 
[root@docker ~]# cd /haproxy/
[root@docker haproxy]# mv /root/haproxy-2.4.0.tar.gz ./file/

entrypoint.sh

[root@docker 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
EOF

count=1
for rs_ip in $RS;do 
cat  >> /usr/local/haproxy/conf/haproxy.cfg <<EOF
     server web$count  $rs_ip:80 check inter 2000 fall 5

EOF
let count++
done

/usr/local/haproxy/sbin/haproxy -db -f /usr/local/haproxy/conf/haproxy.cfg 

/bin/bash

dockerfile

[root@docker haproxy]# cat dockerfile 
FROM alpine

LABEL MAINTAINER='487021296@qq.com'

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

ADD file /tmp
COPY entrypoint.sh /

RUN  ["/bin/sh","-c","/tmp/install.sh"]
EXPOSE 80 8189
ENTRYPOINT ["/entrypoint.sh"]

安装脚本

[root@docker haproxy]# cat file/install.sh 
#! /bin/sh 


sed -i 's/dl-cdn.alpinelinux.org/mirrors.aliyun.com/' /etc/apk/repositories &&\
apk update && \
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 && \
addgroup haproxy
adduser -S -H -s /sbin/nologin haproxy && \

cd /tmp  
tar  xf  haproxy-${version}.tar.gz

cd haproxy-${version}
make -j $(nproc) TARGET=linux-glibc USE_OPENSSL=1 USE_PCRE=1 USE_SYSTEMD=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 -p /usr/local/haproxy/conf 


rm -rf /tmp/* /var/cache/*
yum -y remove gcc make gcc-c++

创建镜像

[root@docker haproxy]# docker build -t haproxy:v0.1 /haproxy
[root@docker haproxy]# docker images 
REPOSITORY               TAG       IMAGE ID       CREATED          SIZE
haproxy                  v0.1      041d53695f6c   42 seconds ago   77MB

[root@docker haproxy]# docker run -d --name haproxy -p 80:80 -e "RS=192.168.66.3 192.168.66.4" haproxy:v0.1 
bf194ecec92141c7372c3bdd3c72de1f7130b74874fa2d02a9de756a41f0d47b
[root@docker haproxy]# docker ps 
CONTAINER ID   IMAGE          COMMAND            CREATED         STATUS         PORTS                                         NAMES
428acb38032a   haproxy:v0.1   "/entrypoint.sh"   4 seconds ago   Up 2 seconds   0.0.0.0:80->80/tcp, :::80->80/tcp, 8189/tcp   haproxy

创建一个nginx容器

[root@docker haproxy]# docker run -d --rm --name web1 linlusama/centos-nginx:v1.20.1
[root@docker haproxy]# docker exec -it web1  /bin/bash  
[root@ce4dbe2d8db3 /]# cat /usr/local/nginx/html/index.html 
我是徐猛他爹

创建一个httpd容器

[root@docker ~]# docker exec -it web2 /bin/bash 
[root@36fc60453e4f src]# cat /usr/local/apache/htdocs/index.html 
<html><body><h1>It works!</h1></body></html>

访问

[root@docker haproxy]#  for i in $(seq 10);do curl 192.168.200.150;done
我是徐猛他爹 
<html><body><h1>It works!</h1></body></html>
我是徐猛他爹 
<html><body><h1>It works!</h1></body></html>
我是徐猛他爹 
<html><body><h1>It works!</h1></body></html>
我是徐猛他爹 
<html><body><h1>It works!</h1></body></html>
我是徐猛他爹 
<html><body><h1>It works!</h1></body></html>