Docker数据管理、网络通信和镜像创建-3

mkdir /opt/systemctl
cd /opt/systemctl

vim Dockerfile
FROM sshd:centos
MAINTAINER this is systemctl image <xc>
ENV container docker
#除了systemd-tmpfiles-setup.service，删除其它所有文件
RUN (cd /lib/systemd/system/sysinit.target.wants/; for i in *; do [ $i == systemd-tmpfiles-setup.service ] || rm -f $i; done); \
rm -f /lib/systemd/system/multi-user.target.wants/*; \
rm -f /etc/systemd/system/*.wants/*; \
rm -f /lib/systemd/system/local-fs.target.wants/*; \
rm -f /lib/systemd/system/sockets.target.wants/*udev*; \
rm -f /lib/systemd/system/sockets.target.wants/*initctl*; \
rm -f /lib/systemd/system/basic.target.wants/*;\
rm -f /lib/systemd/system/anaconda.target.wants/*;
VOLUME [ "/sys/fs/cgroup" ]
#CMD ["/usr/sbin/init"]

//生成镜像
docker build -t systemd:centos .

//启动容器，并挂载宿主机目录挂载到容器中，和进行初始化
docker run --privileged -d -P -v /sys/fs/cgroup:/sys/fs/cgroup:ro systemd:centos /sbin/init
#--privileged：使container内的root拥有真正的root权限。否则，container内的root只是外部的一个普通用户权限。
docker ps -a

//进入容器
docker exec -it 9e4f4b082994 bash
yum -y install httpd
systemctl start httpd
systemctl status httpd

方法二：
docker run --privileged -it -P -v /sys/fs/cgroup:/sys/fs/cgroup:ro systemd:centos /sbin/init &

mkdir /opt/tomcat
cd /opt/tomcat

vim Dockerfile
FROM centos:7
MAINTAINER this is tomcat image <xc>
ADD jdk-8u91-linux-x64.tar.gz /usr/local/
WORKDIR /usr/local/
RUN mv jdk1.8.0_91 /usr/local/java
ENV JAVA_HOME /usr/local/java
ENV JRE_HOME ${JAVA_HOME}/jre
ENV CLASSPATH .:${JAVA_HOME}/lib:${JRE_HOME}/lib
ENV PATH $JAVA_HOME/bin:$PATH
ADD apache-tomcat-8.5.16.tar.gz /usr/local/
WORKDIR /usr/local/
RUN mv apache-tomcat-8.5.16 /usr/local/tomcat
EXPOSE 8080
#CMD ["/usr/local/tomcat/bin/catalina.sh","run"]
ENTRYPOINT ["/usr/local/tomcat/bin/catalina.sh","run"]

//创建新镜像
docker build -t tomcat:centos .

docker run -d --name tomcat01 -p 1216:8080 tomcat:centos
http://192.168.147.105:1216