目录结构

[root@localhost ~]# tree haproxy/
haproxy/
|-- Dockerfile
`-- files
    |-- haproxy-2.5.0.tar.gz
    |-- haproxy.cfg
    |-- install.sh
    `-- start.sh

1 directory, 5 files

Dockerfile文件

FROM centos
LABEL MAINTAINER "gaofan1225 123@qq.com"
ENV haproxy_version 2.5.0

ADD files/haproxy-${haproxy_version}.tar.gz /usr/src/
ADD files/haproxy.cfg /usr/local/haproxy/conf/
ADD files/start.sh /tmp/
ADD files/install.sh /tmp/

RUN ["/bin/bash","-c","/tmp/install.sh"]
EXPOSE 80 8189
WORKDIR /usr/local/haproxy
CMD ["bin/bash","/tmp/start.sh"]

安装脚本

[root@localhost ~]# cd haproxy/files/
[root@localhost files]# ls
haproxy-2.5.0.tar.gz
[root@localhost files]# touch install.sh
[root@localhost files]# chmod +x install.sh
[root@localhost files]# cat install.sh 
#!/bin/bash

rm -rf /etc/yum.repos.d/*
curl -o /etc/yum.repos.d/CentOS-Base.repo https://mirrors.aliyun.com/repo/Centos-$(awk -F'"' 'NR==5{print $2}'  /etc/os-release).repo 
sed -i -e '/mirrors.cloud.aliyuncs.com/d' -e '/mirrors.aliyuncs.com/d' /etc/yum.repos.d/CentOS-Base.repo
yum clean all && yum makecache
yum -y install make gcc gcc-c++ pcre-devel bzip2-devel openssl-devel systemd-devel
useradd -r -M -s /sbin/nologin haproxy
cd /usr/src/haproxy-${haproxy_version}
make clean && \
		make -j $(nproc) \
        TARGET=linux-glibc  \
        USE_OPENSSL=1  \
        USE_ZLIB=1  \
        USE_PCRE=1  \
        USE_SYSTEMD=1 && \
        make install PREFIX=/usr/local/haproxy
cp haproxy /usr/sbin/
echo 'net.ipv4.ip_nonlocal_bind = 1' >>  /etc/sysctl.conf
echo 'net.ipv4.ip_forward = 1' >> /etc/sysctl.conf
rm -rf /var/cache/* /usr/src/haproxy-${haproxy_version}
yum -y remove gcc gcc-c++ make

启动服务脚本

[root@localhost files]# touch start.sh
[root@localhost files]# chmod +x start.sh 
[root@localhost files]# cat start.sh 
#!/bin/bash

/usr/local/haproxy/sbin/haproxy -f /usr/local/haproxy/conf/haproxy.cfg 
/bin/bash

编写配置文件

[root@localhost files]# vim haproxy.cfg
#--------------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 httplogZZZZ
    #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
    server web1 172.17.0.2:80 check inter 2000 fall 5
    server web2 172.17.0.3:80 check inter 2000 fall 5
    #server web01 192.168.80.102:80 cookie web01 check inter 2000 fall 5

构建haproxy镜像

[root@localhost ~]# docker build -t haproxy:v0.1 haproxy/
Successfully built c23b8c6514b3
Successfully tagged haproxy:v0.1

创建haproxy容器

[root@localhost ~]# docker run -itd --name haproxy -p 80:80 e00d757cd30c 
6d101223eceb3be02a2e34718de59482464f9b515927a8409f899399de2f60a8

[root@localhost ~]# docker exec -it haproxy /bin/bash
[root@6d101223eceb haproxy]# 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:*                 

使用httpd镜像创建两个容器

[root@localhost ~]# docker images
REPOSITORY         TAG       IMAGE ID       CREATED          SIZE
haproxy            v0.1      e00d757cd30c   17 minutes ago   410MB
httpd              v0.3      949e5f001032   11 hours ago     423MB
centos             latest    5d0da3dc9764   2 months ago     231MB


[root@localhost ~]# docker run -dit --name httpd1 httpd:v0.3
44d6692c3a15e83458544e93b982f27ce7c2c13211ef839e203063fa834f95f3
[root@localhost ~]# docker exec -it httpd1 /bin/bash
[root@44d6692c3a15 apache]# ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
27: eth0@if28: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default 
    link/ether 02:42:ac:11:00:02 brd ff:ff:ff:ff:ff:ff link-netnsid 0
    inet 172.17.0.2/16 brd 172.17.255.255 scope global eth0
       valid_lft forever preferred_lft forever
[root@44d6692c3a15 apache]# cat /usr/local/apache/htdocs/index.html 
<html><body><h1>It works!</h1></body></html>
[root@44d6692c3a15 apache]# echo "amu" > /usr/local/apache/htdocs/index.html 
[root@44d6692c3a15 apache]# cat /usr/local/apache/htdocs/index.html 
amu

[root@localhost ~]# docker run -dit --name httpd2 httpd:v0.3
0d5f1504f4e4b235543414120d4f0f4822d98734d515d83da959e4ed1fffed80
[root@localhost ~]# docker exec -it httpd2 /bin/bash
[root@0d5f1504f4e4 apache]# ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
29: eth0@if30: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default 
    link/ether 02:42:ac:11:00:03 brd ff:ff:ff:ff:ff:ff link-netnsid 0
    inet 172.17.0.3/16 brd 172.17.255.255 scope global eth0
       valid_lft forever preferred_lft forever
[root@0d5f1504f4e4 apache]# echo "gf" > /usr/local/apache/htdocs/index.html 
[root@0d5f1504f4e4 apache]# cat /usr/local/apache/htdocs/index.html 
gf

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