Dockerfile使用alpine系统制作haproxy镜像

[root@localhost ~]# tree haproxy_alpinelinux/
haproxy_alpine/
├── Dockerfile
└── files
    ├── haproxy-2.4.0.tar.gz
    ├── haproxycfg.sh
    ├── install.sh
    └── sysctl.conf

1 directory, 5 files

[root@localhost ~]# 
[root@localhost ~]# docker pull alpine
Using default tag: latest
latest: Pulling from library/alpine
Digest: sha256:21a3deaa0d32a8057914f36584b5288d2e5ecc984380bc0118285c70fa8c9300
Status: Image is up to date for alpine:latest
docker.io/library/alpine:latest

[root@localhost ~]# docker images
REPOSITORY         TAG       IMAGE ID       CREATED          SIZE
alpine             latest    c059bfaa849c   2 weeks ago      5.59MB

[root@localhost ~]# cat haproxy_alpine/Dockerfile 
FROM alpine

LABEL MAINTAINER "syblyw0806 1234567890@qqq.com"

ENV version 2.4.0

ADD files/haproxy-${version}.tar.gz /opt/
ADD files/install.sh /opt/
ADD files/haproxycfg.sh /opt/
ADD files/sysctl.conf /opt/

RUN /opt/install.sh
ENTRYPOINT /opt/haproxycfg.sh

[root@localhost ~]# cat haproxy_alpine/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 /opt/haproxy-${version}
make TARGET=linux-musl USE_OPENSSL=1 USE_ZLIB=1 USE_PCRE=1 
make install PREFIX=/usr/local/haproxy
cp haproxy  /usr/sbin/
mkdir /etc/haproxy
apk del gcc make
rm -rf /opt/haproxy-${version}/ /opt/install.sh

[root@localhost ~]# cat haproxy_alpine/files/haproxycfg.sh 
#!/bin/sh

cat > /etc/haproxy/haproxy.cfg <> /etc/haproxy/haproxy.cfg < 
sysctl.conf 
[root@localhost ~]# cat haproxy_alpine/files/sysctl.conf 
# sysctl settings are defined through files in
# /usr/lib/sysctl.d/, /run/sysctl.d/, and /etc/sysctl.d/.
#
# Vendors settings live in /usr/lib/sysctl.d/.
# To override a whole file, create a new file with the same in
# /etc/sysctl.d/ and put new settings there. To override
# only specific settings, add a file with a lexically later
# name in /etc/sysctl.d/ and put new settings there.
#
# For more information, see sysctl.conf(5) and sysctl.d(5).
net.ipv4.ip_nonlocal_bind = 1
net.ipv4.ip_forward = 1
 
构建镜像 
[root@localhost ~]# docker build -t haproxy:v3.0 haproxy_alpinelinux/
Sending build context to Docker daemon  3.602MB
Step 1/9 : FROM alpine
 ---> c059bfaa849c
Step 2/9 : LABEL MAINTAINER "syblyw0806 1234567890@qqq.com"
 ---> Using cache
 ---> bbfbe82a7f48
Step 3/9 : ENV version 2.4.0
 ---> Using cache
 ---> dccb41beb82b
Step 4/9 : ADD files/haproxy-${version}.tar.gz /opt/
 ---> Using cache
 ---> 856cb1d8e0de
Step 5/9 : ADD files/install.sh /opt/
 ---> 589a939efe69
Step 6/9 : ADD files/haproxycfg.sh /opt/
 ---> 37bd73459586
Step 7/9 : ADD files/sysctl.conf /opt/
 ---> be1b5cd53414
Step 8/9 : RUN /opt/install.sh
 ---> Running in 6fd54c54e040
 Removing intermediate container 6fd54c54e040
 ---> e1bf872ca416
Step 9/9 : ENTRYPOINT /opt/haproxycfg.sh
 ---> Running in 89515ad8dc41
Removing intermediate container 89515ad8dc41
 ---> 4f4d41c2eebb
Successfully built 4f4d41c2eebb
Successfully tagged haproxy:v3.0


[root@localhost ~]# docker images
REPOSITORY         TAG       IMAGE ID       CREATED             SIZE
haproxy            v3.0      4f4d41c2eebb   about an hour ago   83.8MB
 
启动容器 
[root@localhost ~]# docker run -d --name haproxy_alpinelinux -p 1234:80 -e RSs="172.17.0.2 172.17.0.3" haproxy:v3.0

// 启动一个httpd容器和一个nginx容器
be589a4d9689427ec0810c2f2b28aa59dd4bba425590f0277b4e4f82d3b973e8
[root@localhost ~]# docker run -d --name httpd syblyw0806/httpd:v2.0 
0706632d35fbf02807c5668cae27fc8d3fe3406f198dff5988370c688c630b5b
[root@localhost ~]# docker run -d --name nginx nginx
80ccbde27a8e0d5545b8422f809c9b09f178bff7a20d5bc194925bd707a34af7


[root@localhost ~]# docker exec -it haproxy_alpinelinux /bin/sh
/ # ss -anlt     // 这里如果没有ss命令，需要安装iproute2这个包
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:*                          

[root@localhost ~]# docker ps -a
ConTAINER ID   IMAGE                   COMMAND                  CREATED              STATUS              PORTS                                   NAMES
be589a4d9689   haproxy:v3.0            "/bin/sh -c /opt/hap…"   about a minute ago   Up about a minute   0.0.0.0:1234->80/tcp, :::1234->80/tcp   haproxy_alpinelinux
80ccbde27a8e   nginx                   "/docker-entrypoint.…"   10 minutes ago       Up 10 minutes       80/tcp                                  nginx
0706632d35fb   syblyw0806/httpd:v2.0   "/usr/local/apache/b…"   10 minutes ago       Up 10 minutes       80/tcp                                  httpd
 
访问测试