Docker （五）实战案例_docker项目实战案例

一.构建SSH镜像

##开启ip转发功能
vim /etc/sysctl.conf 

net.ipv4.ip_forward = 1

sysctl -p

systemctl restart docker

1.cd /opt
mkdir sshd

2.vim Dockerfile

FROM centos:7

MAINTAINER this is sshd image <2022-3-9-14:19-zqh>

RUN yum install -y openssh* net-tools lsof telnet passwd

RUN echo 'abc123' | passwd --stdin root

RUN sed -i 's/UsePAM yes/UsePAM no/g' /etc/ssh/sshd_config

RUN sed -i -r '/^session\s+required\s+pam_loginuid.so/ s/^/#/' /etc/pam.d/sshd

RUN ssh-keygen -t rsa -A

RUN mkdir -p /root/.ssh && chown root.root /root && chown 700 /root/.ssh

EXPOSE 22

CMD ["/usr/sbin/sshd","-D"]

3.生成镜像
docker build -t sshd:centos .

4.启动容器并修改root密码
docker run -d -P sshd:centos
docker ps -a
ssh localhost -p 49153
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二.构建systemctl 镜像

1.  mkdir /opt/systemctl
    cd systemctl/
    vim Dockerfile
    
FROM sshd:centos

MAINTAINER this is systemctl image <2022-3-9-zqh>

ENV container docker

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"]

2.生成镜像
docker build -t systemctl:centos .

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