编写haproxy的dockerfile

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

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

LABEL MAINTAINER aaa xaw@qq.com

ENV version 2.4.0

COPY files/haproxy-${version}.tar.gz /usr/src
COPY files/haproxy.cfg /etc/haproxy/haproxy.cfg
COPY files/install.sh /scripts/
COPY files/haproxy.sh /scripts/

RUN ["/bin/bash","-c","/scripts/install.sh"] 

EXPOSE 80 8189

CMD ["/scripts/haproxy.sh"]

[root@localhost files]# cat 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 172.17.0.3:80 check inter 2000 fall 5
    server web02 172.17.0.4:80 check inter 2000 fall 5
    #server web01 192.168.47.163:80 cookie web01 check inter 2000 fall 5

//记得给X权限
[root@localhost files]# cat haproxy.sh 
#!/bin/bash
haproxy -f /etc/haproxy/haproxy.cfg
tail -f /etc/hosts

//记得给X权限
[root@localhost files]# cat install.sh 
yum -y install make gcc pcre-devel bzip2-devel openssl-devel systemd-devel

useradd -r -M -s /sbin/nologin haproxy
cd /usr/src/ && 
tar xf haproxy-${version}.tar.gz
cd haproxy-$version

make clean
make -j $(grep 'processor' /proc/cpuinfo |wc -l)  
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 /usr/src/* /var/cache/*
yum -y remove gcc gcc-c++

构建镜像

[root@localhost haproxy]# docker build -t haproxy:0.3 /haproxy/
Sending build context to Docker daemon  3.601MB
Step 1/10 : FROM centos
 ---> 5d0da3dc9764
Step 2/10 : LABEL MAINTAINER aaa xaw@qq.com
 ---> Using cache
 ---> 03221ef080e2
Step 3/10 : ENV version 2.4.0
 ---> Using cache
 ---> fc5e35f83c81
Step 4/10 : COPY files/haproxy-${version}.tar.gz /usr/src
 ---> Using cache
 ---> e3dd5bc495cf
Step 5/10 : COPY files/haproxy.cfg /etc/haproxy/haproxy.cfg
 ---> Using cache
 ---> 62adf2331711
Step 6/10 : COPY files/install.sh /scripts/
 ---> Using cache
 ---> 4a9e4a685d16
Step 7/10 : COPY files/haproxy.sh /scripts/
 ---> 31e5eba0b11e
Step 8/10 : RUN ["/bin/bash","-c","/scripts/install.sh"]
 ---> Running in 6c5856b292a9
............................................................................
Removing intermediate container 7548ea512bb3
 ---> 82045ccfc9ca
Step 9/10 : EXPOSE 80 8189
 ---> Running in cd4fc2d437ab
Removing intermediate container cd4fc2d437ab
 ---> ec6e4ece6dbe
Step 10/10 : CMD ["/scripts/haproxy.sh"]
 ---> Running in 0b1dd64883de
Removing intermediate container 0b1dd64883de
 ---> a5dc3c62ca7c
Successfully built a5dc3c62ca7c
Successfully tagged haproxy:0.4

//创建容器
[root@localhost ~]# docker run --name haproxy888 -dit -p 8080:80 haproxy:0.7
72b42a58a8ec2cf5e58882d6bb2d88de26555070ec572e571f77b3ce8dc2d775
[root@localhost ~]# docker ps
ConTAINER ID   IMAGE         COMMAND                 CREATED         STATUS         PORTS                                             NAMES
72b42a58a8ec   haproxy:0.7   "/scripts/haproxy.sh"   9 seconds ago   Up 7 seconds   8189/tcp, 0.0.0.0:8080->80/tcp, :::8080->80/tcp   haproxy888
[root@localhost ~]# docker exec -it haproxy888 /bin/bash
[root@72b42a58a8ec /]# ss -antl
State         Recv-Q        Send-Q               Local Address:Port               Peer Address:Port        Process        
LISTEN        0             128                        0.0.0.0:80                      0.0.0.0:*                          
LISTEN        0             128                        0.0.0.0:8189                    0.0.0.0:*                          
[root@72b42a58a8ec /]# 

//创建两个容器实现负载均衡,一台nginx一台httpd
[root@localhost ~]# docker run -it --rm --name httpdddddd centos 
[root@cad86319e1f3 /]# 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
12: eth0@if13:  mtu 1500 qdisc noqueue state UP group default 
    link/ether 02:42:ac:11:00:04 brd ff:ff:ff:ff:ff:ff link-netnsid 0
    inet 172.17.0.4/16 brd 172.17.255.255 scope global eth0
       valid_lft forever preferred_lft forever
[root@cad86319e1f3 /]# yum -y install httpd

//这是nginx
[root@localhost ~]# docker run -itd --name nginxww nginx
26cbe7129e10a49f021577ecf938366b1adae670c78bf6ef10004aa12b815300
[root@localhost ~]# docker ps
ConTAINER ID   IMAGE         COMMAND                  CREATED          STATUS          PORTS                                             NAMES
26cbe7129e10   nginx         "/docker-entrypoint.…"   12 seconds ago   Up 11 seconds   80/tcp                                            nginxww
72b42a58a8ec   haproxy:0.7   "/scripts/haproxy.sh"    3 minutes ago    Up 3 minutes    8189/tcp, 0.0.0.0:8080->80/tcp, :::8080->80/tcp   haproxy888

//查看容器
[root@localhost haproxy]# docker ps
ConTAINER ID   IMAGE        COMMAND                  CREATED              STATUS              PORTS                                             NAMES
f106173e3b69   haproxyyyy   "/scripts/haproxy.sh"    about a minute ago   Up about a minute   8189/tcp, 0.0.0.0:8080->80/tcp, :::8080->80/tcp   haproxy999
cad86319e1f3   centos       "/bin/bash"              22 minutes ago       Up 22 minutes       80/tcp                                            httpdddddd
26cbe7129e10   nginx        "/docker-entrypoint.…"   30 minutes ago       Up 30 minutes       80/tcp                                            nginxww