Dockerfile如何使用alpine系統(tǒng)制作haproxy鏡像

更新時間：2023年05月30日 08:42:51 作者：slyybw

這篇文章主要介紹了Dockerfile如何使用alpine系統(tǒng)制作haproxy鏡像問題，具有很好的參考價值，希望對大家有所幫助。如有錯誤或未考慮完全的地方，望不吝賜教

Dockerfile目錄結(jié)構(gòu)

[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

拉取alpine鏡像

[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

Dockerfile文件內(nèi)容

[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

安裝haproxy的腳本

[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

haproxy配置文件

[root@localhost ~]# cat haproxy_alpine/files/haproxycfg.sh 
#!/bin/sh
cat > /etc/haproxy/haproxy.cfg <<EOF
#--------------????----------------
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
#--------------??????------------------
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??-----------------------
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
EOF
count=1
for rs_ip in $RSs;do
cat >> /etc/haproxy/haproxy.cfg <<EOF
    server web$count $rs_ip:80 check inter 2000 fall 5
EOF
let count++
done
haproxy -f  /etc/haproxy/haproxy.cfg -db

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

構(gòu)建鏡像

[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

啟動容器

[root@localhost ~]# docker run -d --name haproxy_alpinelinux -p 1234:80 -e RSs="172.17.0.2 172.17.0.3" haproxy:v3.0
// 啟動一個httpd容器和一個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     // 這里如果沒有ss命令，需要安裝iproute2這個包
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