本文主要是介绍通过dockerfile构建haproxy镜像，对大家解决编程问题具有一定的参考价值，需要的程序猿们随着小编来一起学习吧！

通过dockerfile构建haproxy镜像

结构

[root@docker ~]# tree /haproxy/
/haproxy/
├── dockerfile
└── file
    ├── haproxy-2.4.0.tar.gz
    └── harpoxy.cfg

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
    server web01 192.168.66.2:80 check inter 2000 fall 5
    server web02 192.168.66.3:80 check inter 2000 fall 5

//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/

//编写dockerfile
[root@docker haproxy]# cat dockerfile 
FROM centos 

LABEL MAINTAINER='487021296@qq.com'

ENV verison 2.4.0


ADD file/haproxy-${verison}.tar.gz /usr/src 
COPY file/haproxy.cfg /etc/haproxy/haproxy.cfg

RUN 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 -j $(nproc) TARGET=linux-glibc USE_OPENSSL=1 USE_PCRE=1 USE_SYSTEMD=1 &&  make install PREFIX=/usr/local/haproxy && \ 
    cp /usr/local/haproxy/sbin/haproxy /usr/sbin && \ 
    echo 'net.ipv4.ip_nonlocal_bind = 1' >> /etc/sysctl.conf && \
    echo 'net.ipv4.ip_forward = 1' >> /etc/sysctl.conf && \ 
    yum -y remove make gcc && \
    rm -rf /var/cache/* && \ 
    rm -rf /usr/src/haproxy-${version}
    

EXPOSE 80 8189 

WORKDIR /usr/local/haproxy
ENTRYPOINT ["/usr/local/haproxy/sbin/haproxy"]
CMD ["-db","-f","/etc/haproxy/haproxy.cfg","-p","/var/run/haproxy.pid"]

//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      44ff2a438db0   3 minutes ago   461MB

//创建haproxy容器
[root@docker ~]# docker run -d --rm --name haproxy -p 80:80 haproxy:v0.1
40c18d1c3aa7cd78526c2a27699d1a17276ad94df7334a48c2676c0f8c3d5446
[root@docker ~]# docker exec -it haproxy /bin/bash 
[root@40c18d1c3aa7 haproxy]# 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
69: eth0@if70: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default 
    link/ether 02:42:c0:a8:42:01 brd ff:ff:ff:ff:ff:ff link-netnsid 0
    inet 192.168.66.1/24 brd 192.168.66.255 scope global eth0
       valid_lft forever preferred_lft forever

创建一个nginx容器

[root@docker ~]# docker run -d --rm --name web1 linlusama/centos-nginx:v1.20.1 
7622549fd19d53557ac5beabea5a0cef2b9ade338d029abe079ecb3285432fb9
[root@docker ~]# docker exec -it web1 /bin/bash 
[root@7622549fd19d /]# 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
71: eth0@if72: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default 
    link/ether 02:42:c0:a8:42:02 brd ff:ff:ff:ff:ff:ff link-netnsid 0
    inet 192.168.66.2/24 brd 192.168.66.255 scope global eth0
       valid_lft forever preferred_lft forever

创建一个httpd容器

[root@docker ~]# docker run -d --rm --name web2 linlusama/apache:latest 
e74dbf195ec2e617db8656e528939afd3991192e468f640f84362242013656e7
[root@docker ~]# docker exec -it web2 /bin/bash 
[root@e74dbf195ec2 src]# 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
73: eth0@if74: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default 
    link/ether 02:42:c0:a8:42:03 brd ff:ff:ff:ff:ff:ff link-netnsid 0
    inet 192.168.66.3/24 brd 192.168.66.255 scope global eth0
       valid_lft forever preferred_lft forever

访问

[root@docker ~]# 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>

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