Docker---使用Dockerfile构建sshd、systemctl、nginx、tomcat镜像

这里写目录标题

• 一：使用Dockerfile构建镜像

一：使用Dockerfile构建镜像

1.1：构建SSHD镜像

1. 创建目录，编写Dockerfile文件

[[e-mail] ~]# mkdir /sshd
[[e-mail] ~]# cd /sshd
[[e-mail] sshd]# vim Dockerfile
[[e-mail] ~]# mkdir /sshd
[[e-mail] ~]# cd /sshd
[[e-mail] sshd]# vim Dockerfile
FROM centos:7	'//指定基础镜像'
MAINTAINER wukong	'//描述信息'
RUN yum -y update	'//更新容器yum源'
RUN yum -y install openssh* net-tools lsof telnet passwd	'//部署环境工具'
RUN echo "123123" | passwd --stdin root	'//设置root登录密码'
RUN sed -i 's/UsePAM yes/UsePAM no/g' /etc/ssh/sshd_config	'//禁用ssh中的pam验证'
RUN ssh-****** -t rsa -f /etc/ssh/ssh_host_rsa_key	'//创建非对称**，并指定文件路径'
RUN sed -i '/^session\s\+required\s\+pam_loginuid.so/ s/^/#/' /etc/pam.d/sshd	'//禁用pam的ssh的pam会话模块'
RUN mkdir -p /root/.ssh && chown root.root /root && chmod 700 /root/.ssh	'//创建ssh工作目录和权限设置'
EXPOSE 22	'//开放22端口'
CMD ["/usr/sbin/sshd","-D"]   	'//容器加载时启动sshd服务'                            

2. 生成镜像

[[e-mail] sshd]# docker build -t sshd:new .  '//注意有个.'
[[e-mail] ssh]# docker ps -a 
CONTAINER ID        IMAGE               COMMAND                  CREATED             STATUS              PORTS                                           NAMES
7106a9ff92a6        sshd:new            "/usr/sbin/sshd -D"      2 hours ago         Up 2 hours          0.0.0.0:32772->22/tcp                           youthful_lumiere

3. 启动容器

docker run -d -P sshd:new

4. 测试登陆

ssh localhosh -p 32772

1.2：构建systemctl镜像

• 基于SSHD镜像继续构建

1. 创建目录，编写Dockerfile文件

[[e-mail] ~]# mkdir /systemctl
[[e-mail] ~]# cd /systemctl
[[e-mail] systemctl]# vim Dockerfile
FROM sshd:test
MAINTAINER built image systemctl <tang>
ENV container docker	'//设置环境变量，container和docker'
RUN yum install -y vim
RUN (cd /lib/systemd/system/sysinit.target.wants/; for i in *;do [ $i == \
systemd-tmpfiles-setup.service ] || rm -f $i; done); \	'//执行先到指定目录，进行for循环遍历目录下所有文件并删除指定的文件。之后进行一系列的删除'
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" ]	'//创建一个挂在卷'
CMD ["/usr/sbin/init"]	'//init指执行初始化'

2. 生成镜像

[[e-mail] systemctl]# docker build -t systemd:new .
[[e-mail] systemctl]# docker ps -a 
CONTAINER ID        IMAGE               COMMAND                  CREATED             STATUS              PORTS                                           NAMES
9d9150c7f37a        systemd:new         "/sbin/init"             About an hour ago   Up About an hour    22/tcp                                          cranky_allen

3. 创建容器

[[e-mail] systemctl]# docker run --privileged -it --name systemd -v /sys/fs/cgroup:/sys/fs/cgroup:ro systemd:new sbin/init 
    '//–privateged 使container内的root拥有真正的root权限，不进行降权处理。否则，container内的用户只是外部的一个普通用户'

4. 进入容器

[[e-mail] ~]# docker exec -it systemd /bin/bash
[[e-mail] /]# systemctl status sshd
● sshd.service - OpenSSH server daemon
   Loaded: loaded (/usr/lib/systemd/system/sshd.service; disabled; vendor preset: enabled)
   Active: inactive (dead)
     Docs: man:sshd(8)
           man:sshd_config(5)
[[e-mail] /]# systemctl start sshd

1.3：构建nginx镜像

1. 创建目录并编写Dockerfile文件

[[e-mail] ~]# mkdir /nginx
[[e-mail] ~]# cd /nginx/
[[e-mail] nginx]# vim Dockerfile
FROM centos:7
MAINTAINER this is nginx image <zhang>
RUN yum -y update
RUN yum -y install pcre-devel zlib-devel gcc gcc-c++ make
RUN useradd -M -s /sbin/nologin nginx
ADD nginx-1.12.2.tar.gz /usr/local/src
WORKDIR /usr/local/src
WORKDIR nginx-1.12.2
RUN ./configure \
--prefix=/usr/local/nginx \
--user=nginx \
--group=nginx \
--with-http_stub_status_module && make && make install
ENV PATH /usr/local/nginx/sbin:$PATH
EXPOSE 80
EXPOSE 443
RUN echo "daemon off;">>/usr/local/nginx/conf/nginx.conf
ADD run.sh /run.sh
RUN chmod 755 /run.sh
CMD ["/run.sh"]

2. 编写启动脚本

[[e-mail] nginx]# vim run.sh
#!/bin/bash
/usr/local/nginx/sbin/nginx

3. 生成镜像

[[e-mail] nginx]# docker build -t nginx:new .

4. 创建容器

[[e-mail] nginx]# docker run -d -P nginx:new

5. 查看容器状态

[[e-mail] ssh]# docker ps -a 
CONTAINER ID        IMAGE               COMMAND                  CREATED             STATUS              PORTS                                           NAMES
cc4cae9d50be        nginx:new           "/run.sh"                35 minutes ago      Up 35 minutes       0.0.0.0:32774->80/tcp, 0.0.0.0:32773->443/tcp   jolly_lederberg

6. 网页测试
   

1.4：构建tomcat镜像

1. 创建目录并编写Dockerfile文件，上传相关文件

[[e-mail] ~]# mkdir /tomcat
[[e-mail] ~]# cd /tomcat/
[[e-mail] tomcat]# vim Dockerfile
FROM centos:7
MAINTAINER this is tomcat image <chen>
ADD jdk-8u144-linux-x64.tar.gz /usr/local
WORKDIR /usr/local
RUN mv jdk1.8.0_144 /usr/local/java
ENV JAVA_HOME /usr/local/java
ENV JAVA_BIN /usr/local/java/bin
ENV JRE_HOME /usr/local/java/jre
ENV PATH $PATH:/usr/local/java/bin:/usr/local/java/jre/bin
ENV CLASSPATH /usr/local/java/jre/bin:/usr/local/java/lib:/usr/local/java/jre/lib/charsets.jar
ADD apache-tomcat-8.5.23.tar.gz /usr/local
WORKDIR /usr/local/
RUN mv apache-tomcat-8.5.23 /usr/local/tomcat8
EXPOSE 8080
#CMD ["/usr/local/tomcat8/bin/catalina.sh","run"]
ENTRYPOINT  ["/usr/local/tomcat8/bin/catalina.sh","run"]

2. 生成镜像

[e-mail] tomcat]# docker build -t tomcat:centos . 

3. 创建容器

[[e-mail] tomcat]# docker run -d --name tomcat01 -p 326:8080 tomcat:centos
[[e-mail] ssh]# docker ps -a 
CONTAINER ID        IMAGE               COMMAND                  CREATED             STATUS              PORTS                                           NAMES
d8ef3892dd5d        tomcat:centos       "/usr/local/tomcat8/…"   11 minutes ago      Up 11 minutes       0.0.0.0:326->8080/tcp                           tomcat01

4. 网页测试