使用Dockerfile建立帶Apache服務的CentOS Docker鏡像
在宿主機上準備的檔案清單:
Dockerfile
以上檔案都放到/root/apache_centos目錄下
mkdir -p /root/apache_centoscd /root/apache_centos
基礎鏡像:以鏡像centos為基礎的開放SSH服務的鏡像
[root@localhost apache_centos]# docker imagesREPOSITORY TAG IMAGE ID CREATED VIRTUAL SIZEsshd dockerfile 411d5fb16366 23 hours ago 278 MBcentos latest 0f73ae75014f 5 weeks ago 172.3 MB
一、準備run.sh檔案
在/root/apache_centos目錄建立run.sh
內容如下:
#!/bin/bash/usr/sbin/sshd &/usr/local/apache2/bin/httpd -D FOREGROUND
二、準備Dockerfile
在/root/apache_centos目錄建立Dockerfile
檔案內容如下:
#新產生的鏡像是基於sshd:dockerfile鏡像FROM sshd:dockerfileMAINTAINER by Steven#安裝wgetRUN yum install -y wgetWORKDIR /usr/local/src#下載並解壓源碼包RUN wget http://apache.fayea.com/httpd/httpd-2.4.17.tar.gzRUN tar -zxvf httpd-2.4.17.tar.gzWORKDIR httpd-2.4.17#編譯安裝apacheRUN yum install -y gcc make apr-devel apr apr-util apr-util-devel pcre-develRUN ./configure --prefix=/usr/local/apache2 --enable-mods-shared=most --enable-soRUN makeRUN make install#修改apache設定檔RUN sed -i 's/#ServerName www.example.com:80/ServerName localhost:80/g' /usr/local/apache2/conf/httpd.conf#啟動apache服務RUN /usr/local/apache2/bin/httpd#複製服務啟動指令碼並設定許可權ADD run.sh /usr/local/sbin/run.shRUN chmod 755 /usr/local/sbin/run.sh#開放80連接埠EXPOSE 80CMD ["/usr/local/sbin/run.sh"]
需要注意的是:在Dockerfile檔案中更換目前的目錄不可以用“cd”命令,而要改用“WORKDIR”.
三、產生鏡像
docker build -t apache_dockerfile:centos .
查看產生的鏡像:
[root@localhost apache_centos]# docker imagesREPOSITORY TAG IMAGE ID CREATED VIRTUAL SIZEapache_dockerfile centos f8f30b4a0ee8 24 minutes ago 440 MBapache centos f92c55dddd07 17 hours ago 423.9 MBsshd dockerfile 411d5fb16366 23 hours ago 278 MBcentos latest 0f73ae75014f 5 weeks ago 172.3 MB
四、根據鏡像產生的容器並進行測試
1、產生新的容器
docker run -d -p 2222:22 -p 8000:80 apache_dockerfile:centos /usr/local/sbin/run.sh
將容器的22連接埠和80連接埠分別映射到到宿主機上的2222連接埠和8000連接埠,並運行服務指令碼。
2、查看新產生的容器:
[root@localhost apache_centos]# docker ps -aCONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMESae560e497f39 apache_dockerfile:centos "/usr/local/sbin/run 45 seconds ago Up 44 seconds 0.0.0.0:2222->22/tcp, 0.0.0.0:8000->80/tcp condescending_bardeen6490cd244c10 apache:centos "/usr/local/apache2/ 17 hours ago Exited (0) 17 hours ago loving_wright673e946b57e4 sshd:dockerfile "/usr/local/sbin/run 18 hours ago Exited (137) 17 hours ago reverent_bell
3、測試
測試apache
[root@localhost apache_centos]# curl localhost:8000<html><body><h1>It works!</h1></body></html>
成功!
測試ssh
[root@localhost apache_centos]# ssh localhost -p 2222root@localhost's password:
成功!
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