使用dockerfile编写haproxy镜像

[root@localhost ~]# tree haproxy/
haproxy/
├── Dockerfile
└── files
    ├── haproxy-2.4.0.tar.gz
    ├── haproxy.cfg
    ├── install.sh
    └── start.sh

Dockerfile

[root@localhost ~]# cat haproxy/Dockerfile 
FROM centos

LABEL MAINTAINER='xxkk 1@2.com'

ADD files/haproxy-2.4.0.tar.gz /usr/src/
ADD files/install.sh /tmp/
ADD files/haproxy.cfg /etc/haproxy/haproxy.cfg
ADD files/start.sh /start.sh

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

install.sh脚本

[root@localhost ~]# cat haproxy/files/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 -y install make gcc pcre-devel bzip2-devel openssl-devel systemd-devel
useradd -r -M -s /sbin/nologin haproxy
cd /usr/src/haproxy-2.4.0
make clean && 
        make 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

启动脚本

[root@docker /]# cat /haproxy/files/start.sh 
#!/bin/sh

/usr/local/haproxy/sbin/haproxy -f /etc/haproxy/haproxy.cfg

/bin/bash

haproxy配置文件

[root@localhost ~]# cat haproxy/files/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 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
    server web01 192.168.100.3:80 check inter 2000 fall 5
    server web02 192.168.100.4:80 check inter 2000 fall 5

制作镜像

[root@localhost ~]# docker build -t haproxy:v0.3 haproxy
Sending build context to Docker daemon    3.6MB
Step 1/7 : FROM centos
 ---> 5d0da3dc9764
Step 2/7 : LABEL MAINTAINER='xxkk 1@2.com'
 ---> Using cache
 ---> 87a719477c29
Step 3/7 : ADD files/haproxy-2.4.0.tar.gz /usr/src/
 ---> Using cache

启动容器

[root@localhost ~]# docker run -tid --name haproxy 267563f33047
f483ae6b77a1958317a9b64b313c8cee705eabce9b97fee0ef0d7db1feb19df5
[root@localhost ~]# docker exec -it haproxy /bin/bash
[root@f483ae6b77a1 /]# /usr/local/haproxy/sbin/haproxy -f /etc/haproxy/haproxy.cfg
[root@f483ae6b77a1 /]# 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:*  

编写web1网页文件

[root@637db4367007 /]# vi /var/www/html/index.html
[root@637db4367007 /]# cat /var/www/html/index.html 
web1
[root@637db4367007 /]# ip a
1: lo:  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
93: eth0@if94:  mtu 1500 qdisc noqueue state UP group default 
    link/ether 02:42:c0:a8:64:03 brd ff:ff:ff:ff:ff:ff link-netnsid 0
    inet 192.168.100.3/24 brd 192.168.100.255 scope global eth0
       valid_lft forever preferred_lft forever

编写web2网页文件

[root@d17bc9125eb8 /]# ip a
1: lo:  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
95: eth0@if96:  mtu 1500 qdisc noqueue state UP group default 
    link/ether 02:42:c0:a8:64:04 brd ff:ff:ff:ff:ff:ff link-netnsid 0
    inet 192.168.100.4/24 brd 192.168.100.255 scope global eth0
       valid_lft forever preferred_lft forever
[root@d17bc9125eb8 /]# vi /var/www/html/index.html
[root@d17bc9125eb8 /]# cat /var/www/html/index.html 
web2

测试访问

[root@f483ae6b77a1 /]# ip a
1: lo:  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
91: eth0@if92:  mtu 1500 qdisc noqueue state UP group default 
    link/ether 02:42:c0:a8:64:02 brd ff:ff:ff:ff:ff:ff link-netnsid 0
    inet 192.168.100.2/24 brd 192.168.100.255 scope global eth0
       valid_lft forever preferred_lft forever
[root@f483ae6b77a1 /]# for i in $(seq 10);do curl 192.168.100.2;done
web1
web2
web1
web2
web1
web2
web1
web2
web1
web2