提前通过docker run运行两台Apache镜像

[root@localhost ~]# docker run -it -d --name web1 luojiatian1904/httpd
[root@localhost ~]# docker run -it -d --name web2 luojiatian1904/httpd
[root@localhost ~]# docker ps -a
ConTAINER ID   IMAGE                  COMMAND                  CREATED          STATUS                     PORTS     NAMES
1854792e046f   luojiatian1904/httpd   "/usr/local/apache/b…"   22 minutes ago   Up 22 minutes              80/tcp    web2
55a78e08619e   luojiatian1904/httpd   "/usr/local/apache/b…"   22 minutes ago   Up 22 minutes              80/tcp    web1

更改web2的访问内容

[root@localhost ~]# docker exec -it 1854792e046f /bin/bash
[root@1854792e046f src]# cd /usr/local/apache/htdocs/
[root@1854792e046f htdocs]# vi index.html 
123
[root@1854792e046f ~]# /usr/local/apache/bin/apachectl restart
AH00558: httpd: Could not reliably determine the server's fully qualified domain name, using 192.168.2.3. Set the 'ServerName' directive globally to suppress this message
[root@1854792e046f src]# exit
exit
[root@localhost ~]# curl 192.168.2.3
123
[root@localhost ~]# curl 192.168.2.4
It works!

在/opt/下创建一个haproxy目录负责存放haproxy的Dockerfile和文件目录

[root@localhost opt]# mkdir -p haproxy/files

编写Dockerfile文件

FROM alpine
  
LABEL MAINTAINER='jtluo luojiatian01518@163.com'
ENV version 2.4.0

COPY files /tmp/
RUN ["/bin/sh","-c","/tmp/install.sh"]
EXPOSE 80 8189
CMD ["/usr/local/haproxy/sbin/haproxy" ,"-Ws","-f","/etc/haproxy/haproxy.cfg"]

编写install.sh脚本

#!/bin/sh

sed -i 's/dl-cdn.alpinelinux.org/mirrors.aliyun.com/' /etc/apk/repositories
apk update
adduser -S -H -s /sbin/nologin haproxy
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
cd /tmp/
tar xf haproxy-$version.tar.gz
cd haproxy-$version && 
make  TARGET=linux-musl USE_OPENSSL=1 USE_PCRE=1 USE_ZLIB=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
mkdir /etc/haproxy
cat > /etc/haproxy/haproxy.cfg <> /etc/haproxy/haproxy.cfg < 
创建RSs.txt指定RSip
 
[root@localhost opt]# vim haproxy/files/RSs.txt 
192.168.2.3
192.168.2.4
 
通过Dockerfile构建镜像
 
[root@localhost haproxy]# docker build -t luojiatian1904/haproxy:alpine .
Removing intermediate container 88adffe6b5fa
 ---> f98d1403450b
Successfully built f98d1403450b
Successfully tagged luojiatian1904/haproxy:apline
 
通过镜像构建容器
 
[root@localhost opt]# docker run -d --name haproxy -p 80:80 -p 8189:8189 luojiatian1904/haproxy:latest
10ec98a57295730bf58136e583e04f1b4824323abb2771d3791063ddf72950b9
[root@localhost opt]# docker ps -a
ConTAINER ID   IMAGE                  COMMAND                  CREATED         STATUS         PORTS                                                                          NAMES
67538d318390   luojiatian1904/httpd   "/usr/local/apache/b…"   3 minutes ago   Up 3 minutes   80/tcp                                                                         web2
0da2f785d283   luojiatian1904/httpd   "/usr/local/apache/b…"   3 minutes ago   Up 3 minutes   80/tcp                                                                         web1
10ec98a57295   luojiatian1904/haproxy:apline        "/usr/local/haproxy/…"   4 minutes ago   Up 4 minutes   0.0.0.0:80->80/tcp, :::80->80/tcp, 0.0.0.0:8189->8189/tcp, :::8189->8189/tcp   haproxy
[root@localhost haproxy]# ss -anlt
State     Recv-Q     Send-Q         Local Address:Port         Peer Address:Port    Process     
LISTEN    0          128                  0.0.0.0:8080              0.0.0.0:*  

 
通过浏览器访问宿主机