21 Feb 2017
假设已经安装docker，从零开始build一个tomcat应用镜像
其中最重要的地方是dockerfile的语法和编写。
dockerfile是一个脚本，其中包含了多种命令及参数，用以在基础image之上进行修改并创建新的image。
具体的语法和介绍，见dockerfile官方文档
mkdir tomcat7 cd tomcat7 touch Dockerfile vim Dockerfile ***************************** From tomcat:7.0.75-jre7 MAINTAINER opsuser ADD index.txt /usr/local/tomcat/webapps/ROOT ***************************** echo "hello world" > index.txt
docker build -t tomcat7:test . Sending build context to Docker daemon 3.072 kB Step 1/3 : FROM tomcat:7.0.75-jre7 7.0.75-jre7: Pulling from library/tomcat 5040bd298390: Pull complete fce5728aad85: Pull complete c42794440453: Pull complete 9789263043d1: Pull complete 6c6ea13aad15: Pull complete 55336e5423a8: Pull complete 228d33a53bdd: Pull complete 3a1cfabb401c: Pull complete b5f79327b275: Pull complete 9af156814a79: Pull complete b746aa8b2a6c: Pull complete Digest: sha256:f13fb03f10b5b549a0aedc8bfbfe9b416024e34a9394d58dfc96f62b01ace2fd Status: Downloaded newer image for tomcat:7.0.75-jre7 ---> ba0a180b4eb7 Step 2/3 : MAINTAINER opsuser ---> Running in 339e4f80147f ---> a48246d3100f Removing intermediate container 339e4f80147f Step 3/3 : ADD index.txt /usr/local/tomcat/webapps/ROOT/ ---> 1689dc190a0c Removing intermediate container 487da4842a09 Successfully built 1689dc190a0c
docker run -itd --rm -p 8000:8080 tomcat7:test
# 查看结果
curl 192.168.33.110:8000/index.txt
hello world