yum -y install docker
docker --version
systemctl start docker

sudo mkdir -p /etc/docker
sudo tee /etc/docker/daemon.json <<-'EOF'
{
  "registry-mirrors": ["https://qifjlwgz.mirror.aliyuncs.com"]
}
EOF
sudo systemctl daemon-reload
sudo systemctl restart docker

拉取tomcat:docker pull tomcat:8.5.40
查看拉取的镜像：docker images
启动tomcat容器：docker run --name tomcat8 -d -p 8080:8080 tomcat:8.5.40
启动日志：docker logs containerID
查看启动容器：docker ps
查看停止容器列表：docker ps -a
进入容器：docker exec -it containerID /bin/bash
退出容器：exit
关闭容器：docker stop tomcat8
删除容器：docker rm tomcat8
开启对应端口，重启防火墙后需重启docker，否则启动容器失败

docker cp test.war tomcat8:/usr/local/tomcat/webapps
docker restart tomcat8
访问项目：ip:8080/test

vim Dockerfile
内容：
	from tomcat:8.5.40
	
	MAINTAINER qif qif@foxmail.com
	
	COPY qif.war /usr/local/tomcat/webapps
构建：docker build -t qifProject:latest .
运行：docker run --name qif -d -p 8080:8080 qifProject