制作tomcat的docker镜像

Posted 2020-10-13

制作tomcat的docker镜像

一 commit制作tomcat的docker镜像

1 centos下安装docker

    yum -y install docker

 启动docker

    systemctl start docker

 设置开机启动

systemctl start docker

 

2 安装centos镜像

查找centos镜像

docker search centos

拉取centos镜像

docker pull centos

查看cenots镜像

docker images

 

 

3 进入centos容器配置ssh

3.1进入centos容器

docker run  -i -t centos  /bin/bash

3.2安装网络工具

yum -y install net-tools

 

3.3安装passwd,openssl,openssh-server

[[email protected] /]# yum install passwd openssl openssh-server -y

 

启动sshd:

# /usr/sbin/sshd -D   //直接/usr/sbin/sshd启动也可以

这时报以下错误：

[[email protected] b5926410fe60 /]# /usr/sbin/sshd

Could not load host key: /etc/ssh/ssh_host_rsa_key

Could not load host key: /etc/ssh/ssh_host_ecdsa_key

Could not load host key: /etc/ssh/ssh_host_ed25519_key

 

 

执行以下命令解决：

[[email protected] /]# ssh-keygen -q -t rsa -b 2048 -f /etc/ssh/ssh_host_rsa_key -N ‘‘  

[[email protected] /]# ssh-keygen -q -t ecdsa -f /etc/ssh/ssh_host_ecdsa_key -N ‘‘

[[email protected] /]# ssh-keygen -t dsa -f /etc/ssh/ssh_host_ed25519_key -N ‘‘

 

然后，修改 /etc/ssh/sshd_config 配置信息：

UsePAM yes 改为 UsePAM no

UsePrivilegeSeparation sandbox 改为 UsePrivilegeSeparation no

 

[[email protected] /]# sed -i "s/#UsePrivilegeSeparation.*/UsePrivilegeSeparation no/g" /etc/ssh/sshd_config

[[email protected] /]# sed -i "s/UsePAM.*/UsePAM no/g" /etc/ssh/sshd_config

 

修改完后，重新启动sshd

[[email protected] /]# /usr/sbin/sshd

可以查看到22端口已经起来

[[email protected] /]# netstat -tulnp|grep 22

tcp        0      0 0.0.0.0:22              0.0.0.0:*               LISTEN      90/sshd             

tcp6       0      0 :::22                   :::*                    LISTEN      90/sshd     

 

 

3.4修改root 密码

 [[email protected] /]# passwd root

四. 查看容器ip地址（如果宿主机是linux操作系统则跳过这一步）

[[email protected] /]# ip addr ls eth0

84: [email protected]: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP

  link/ether 02:42:ac:11:00:02 brd ff:ff:ff:ff:ff:ff

  inet 172.17.0.2/16 scope global eth0

    valid_lft forever preferred_lft forever

  inet6 fe80::42:acff:fe11:2/64 scope link

valid_lft forever preferred_lft forever

 

 

3.5保存当前的镜像，退出会恢复初始状态

 

[[email protected] ~]# docker ps -all

CONTAINER ID        IMAGE               COMMAND             CREATED             STATUS              PORTS               NAMES

597847f19876        centos              "/bin/bash"         17 minutes ago      Up 16 minutes                           suspicious_mccarthy

[[email protected] ~]# docker commit 597847f19876 zhuzhou/centos-1

sha256:8bb2fccf7a1e08a8b3fa30ef6120ae401673180768260336e433a1d00b8c3029

[[email protected] ~]# docker ps -all

CONTAINER ID        IMAGE               COMMAND             CREATED             STATUS              PORTS               NAMES

597847f19876        centos              "/bin/bash"         17 minutes ago      Up 17 minutes                           suspicious_mccarthy

[[email protected] ~]# docker images

REPOSITORY          TAG                 IMAGE ID            CREATED             SIZE

zhuzhou/centos-1    latest              8bb2fccf7a1e        10 seconds ago      280.4 MB

docker.io/centos    latest              196e0ce0c9fb        7 weeks ago         196.6 MB

 

4进入容器部署应用

4.1 退出容器，在设置端口映射进入系统

 

[[email protected] ~]# docker run  -i -t  -p 32:22  centos  /bin/bash

[[email protected] /]# exit

exit

[[email protected] ~]#

[[email protected] ~]#

[[email protected] ~]# docker run  -i -t  -p 32:22  zhuzhou/centos-1  /bin/bash

[[email protected] /]#

[[email protected] /]# /usr/sbin/sshd

WARNING: ‘UsePAM no‘ is not supported in Red Hat Enterprise Linux and may cause several problems.

[[email protected] /]#

 

 

4.2文件传输到centos容器中

 

（1） 可以通过xshell工具直接连上本机ip：32端口，可以通过sftp工具直接传输文件到容器内。

 

 

 

 

 

（2）通过cp命令将宿主机传送到容器中

 

[[email protected] home]# docker ps -all

CONTAINER ID        IMAGE               COMMAND             CREATED             STATUS              PORTS                NAMES

741c0bf053d6        zhuzhou/centos-1    "/bin/bash"         8 minutes ago       Up 8 minutes        0.0.0.0:32->22/tcp   romantic_bassi

[[email protected] home]# docker cp /home/hadoop

hadoop/                     hadoop-3.0.0-alpha4/        hadoop-3.0.0-alpha4.tar.gz  

[[email protected] home]# docker cp /home/hadoop-3.0.0-alpha4.tar.gz   741c0bf053d6:/home/

[[email protected] home]#

 

 

4.3在宿主机中配置Java环境和解压tomcat

 

4.4 保存当前的镜像

[[email protected] home]# docker ps -all

CONTAINER ID        IMAGE               COMMAND             CREATED             STATUS              PORTS                NAMES

741c0bf053d6        zhuzhou/centos-1    "/bin/bash"         17 minutes ago      Up 17 minutes       0.0.0.0:32->22/tcp   romantic_bassi

[[email protected] home]# docker commit 741c0bf053d6  zhuzhou/centos-tomcat

sha256:70a6934fbd03fb95dda31e8acf240c07ef8a0aed39853a9e582e34e7ee7ddded

[[email protected] home]# docker images

REPOSITORY              TAG                 IMAGE ID            CREATED             SIZE

zhuzhou/centos-tomcat   latest              70a6934fbd03        6 seconds ago       1.067 GB

zhuzhou/centos-1        latest              8bb2fccf7a1e        25 minutes ago      280.4 MB

docker.io/centos        latest              196e0ce0c9fb        7 weeks ago         196.6 MB

 

 

 

 

4.5 启动docker后台运行

[[email protected] ~]# docker run  -d -p 8080:8080 -p 32:22 zhuzhou/centos-tomcat  /usr/sbin/sshd -D

435a824136e5820c56fa86d78d1131495191a4c01330671cf546a8660b315062

[[email protected] ~]# docker ps -all

CONTAINER ID        IMAGE                   COMMAND               CREATED             STATUS              PORTS                                        NAMES

435a824136e5        zhuzhou/centos-tomcat   "/usr/sbin/sshd -D"   7 seconds ago       Up 6 seconds        0.0.0.0:8080->8080/tcp, 0.0.0.0:32->22/tcp   fervent_euclid

[[email protected] ~]#

 

5 保存镜像

[[email protected] ~]# docker save -o /home/docker-centos-tomcat.tar  zhuzhou/centos-tomcat

[[email protected] ~]# cd /home/

[[email protected] home]# ls

docker-centos-tomcat.tar  hadoop  hadoop-3.0.0-alpha4  hadoop-3.0.0-alpha4.tar.gz  jdk-8u101-linux-x64.rpm  joe

[[email protected] home]#

 

6 导入镜像到另一个系统中

[[email protected] home]# docker load -i docker-centos-tomcat.tar

cf516324493c: Loading layer 205.2 MB/205.2 MB

d849bfac7f38: Loading layer 84.08 MB/84.08 MB

5c0e5e62d633: Loading layer 789.3 MB/789.3 MB

Loaded image: zhuzhou/centos-tomcat:latest MB

[[email protected] home]# docker images

REPOSITORY              TAG                 IMAGE ID            CREATED             SIZE

zhuzhou/centos-tomcat   latest              70a6934fbd03        About an hour ago   1.067 GB

 

 

二 Dockerfile文件制作tomcat的docker镜像

1 编写Dockerfile文件

[[email protected] docker-build]# cd /home/docker-build/

[[email protected] docker-build]# ls

apache-tomcat-7.0.79  apache-tomcat-7.0.79.tar.gz  jdk1.7.0_80  jdk-7u80-linux-x64.tar.gz

[[email protected] docker-build]# vi Dockerfile

 

FROM         centos

MAINTAINER    linux

 

#指定RUN、CMD与ENTRYPOINT命令的工作目录

WORKDIR /home  

 

#安装网络工具和ssh

RUN yum -y install net-tools

 

 

#把java与tomcat添加到容器中

ADD  apache-tomcat-7.0.79.tar.gz   /home

ADD  jdk-7u80-linux-x64.tar.gz     /home

 

#安装jdk和tomcat,实际测试中加下面两个解压语句会报错，docker会自动进行解压

#RUN tar -xzvf apache-tomcat-7.0.79.tar.gz

#RUN tar -xzvf  jdk-7u80-linux-x64.tar.gz

 

#配置环境

ENV JAVA_HOME /home/jdk1.7.0_80

ENV CLASS_PATH $JAVA_HOME/lib:$JAVA_HOME/jre/lib:$JAVA_HOME/lib/tools.jar

ENV PATH $PATH:$JAVA_HOME/bin

#设置tomcat 自启动,测试tomcat没有起来

CMD /home/apache-tomcat-7.0.79/bin/startup.sh

#容器运行时监听的端口

EXPOSE  8080

 

 

 

2 创建镜像

 

docker build -t  zhuzhou/centos-tomcat-2  .    

注：如果要ADD本地文件，则本地文件必须在 docker build <PATH>，指定的<PATH>目录下。

 

 

 

注：个人建议采用第一种方式，简单直接