- 结构
- 拉取镜像
- 编写Dockerfile
- 相关文件
- 配置文件
- 安装脚本
- 构建镜像
- 测试
[root@localhost ~]# tree haproxy
haproxy
├── Dockerfile
└── files
├── haproxy-2.5.0.tar.gz
├── haproxycfg.sh
└── install.sh
1 directory, 4 files
拉取镜像
[root@localhost ~]# docker pull alpine Using default tag: latest latest: Pulling from library/alpine 59bf1c3509f3: Pull complete Digest: sha256:21a3deaa0d32a8057914f36584b5288d2e5ecc984380bc0118285c70fa8c9300 Status: Downloaded newer image for alpine:latest docker.io/library/alpine:latest [root@localhost ~]# docker images REPOSITORY TAG IMAGE ID CREATED SIZE haproxy v0.5 0190b2adbaac 45 hours ago 495MB busybox latest ffe9d497c324 5 days ago 1.24MB httpd v1.0 3471d3329f64 6 days ago 721MB nginx latest f652ca386ed1 10 days ago 141MB alpine latest c059bfaa849c 2 weeks ago 5.59MB centos latest 5d0da3dc9764 2 months ago 231MB编写Dockerfile
[root@localhost ~]# cat haproxy/Dockerfile
#基础镜像
FROM alpine
#作者信息
LABEL MAINTAINER 'lxx'
#环境变量
ENV version 2.5.0
#传输文件
ADD files/haproxy-${version}.tar.gz /tmp/
ADD files/install.sh /tmp/
ADD files/haproxycfg.sh /tmp/
#安装
RUN /tmp/install.sh
#暴露端口
EXPOSE 80 8189
#启动命令
ENTRYPOINT /tmp/haproxycfg.sh
相关文件
配置文件
//利用脚本传递变量的方式进行生成
[root@localhost ~]# cat haproxy/Dockerfile
#基础镜像
FROM alpine
#作者信息
LABEL MAINTAINER 'lxx'
#环境变量
ENV version 2.5.0
#传输文件
ADD files/haproxy-${version}.tar.gz /tmp/
ADD files/install.sh /tmp/
ADD files/haproxycfg.sh /tmp/
#安装
RUN /tmp/install.sh
#暴露端口
EXPOSE 80 8189
#启动命令
ENTRYPOINT /tmp/haproxycfg.sh
[root@localhost ~]# cat haproxy/files/haproxycfg.sh
#!/bin/sh
cat > /etc/haproxy/haproxy.cfg <> /etc/haproxy/haproxy.cfg <
安装脚本
[root@localhost ~]# cat haproxy/files/install.sh
#!/bin/sh
sed -i 's/dl-cdn.alpinelinux.org/mirrors.aliyun.com/' /etc/apk/repositories
apk update
adduser -S -H -s /sbin/nologin haproxy
addgroup 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/haproxy-${version}
make TARGET=linux-musl USE_OPENSSL=1 USE_ZLIB=1 USE_PCRE=1
make install PREFIX=/usr/local/haproxy
echo 'net.ipv4.ip_nonlocal_bind = 1' >> /etc/sysctl.conf
echo 'net.ipv4.ip_forward = 1' >> /etc/sysctl.conf
cp haproxy /usr/sbin/
mkdir /etc/haproxy
apk del gcc make
rm -rf /tmp/haproxy-2.5.0/ /tmp/install.sh
构建镜像
[root@localhost ~]# docker build -t haproxy:alpine haproxy/
Sending build context to Docker daemon 3.811MB
Step 1/7 : FROM alpine
---> c059bfaa849c
Step 2/7 : LABEL MAINTAINER 'lxx'
---> Using cache
---> 48c0ed157160
Step 3/7 : ENV VERSION 2.5.0
---> Using cache
---> 192037a94321
Step 4/7 : ADD files /tmp/
---> 4f7b431d675b
Step 5/7 : RUN /tmp/install.sh
...略
OK: 35 MiB in 45 packages
Removing intermediate container 1c3be38bebd7
---> c3b767a99948
Step 6/7 : EXPOSE 80 8189
---> Running in 3b70ad06302f
Removing intermediate container 3b70ad06302f
---> c2a90a72f583
Step 7/7 : ENTRYPOINT /tmp/haproxycfg.sh
---> Running in ca8e1f33e965
Removing intermediate container ca8e1f33e965
---> 86f0df80b75e
Successfully built 86f0df80b75e
Successfully tagged haproxy:alpine
测试
//启2个上篇文章的httpd容器
[root@localhost ~]# docker start 3b9401d15c79
3b9401d15c79
[root@localhost ~]# docker start c72fd66f9fe7
c72fd66f9fe7
[root@localhost ~]# docker ps -a
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
3b9401d15c79 httpd:v1.0 "/scripts/start.sh" 45 hours ago Up 11 seconds 0.0.0.0:82->80/tcp, :::82->80/tcp web2
c72fd66f9fe7 httpd:v1.0 "/scripts/start.sh" 45 hours ago Up 3 seconds web1
[root@localhost ~]# docker inspect web1
//查看ip
...略
Gateway": "172.17.0.1",
"IPAddress": "172.17.0.3",
"IPPrefixLen": 16,
"IPv6Gateway": "",
"GlobalIPv6Address": "",
"GlobalIPv6PrefixLen": 0,
"MacAddress": "02:42:ac:11:00:03",
"DriverOpts": null
...
//启动容器传递ip，映射80端口
[root@localhost ~]# docker run -itd --name haproxy-1 -p 80:80 -e RSs="172.17.0.3 172.17.0.2" haproxy:alpine
