转载地址：https://my.oschina.net/jywm/blog/754123
一、查看当前镜像
[root@iZ25av9xi4hZ ~]# docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
docker.io/centos latest 980e0e4c79ec 3 weeks ago 196.7 MB
[root#
上面的centos 是通过docker pull centos拉取获得的最新centos7 版本
二、创建一个容器，并配置ssh、tomcat、jdk
2.1 创建一个容器（命名为base_centos）
# docker run -it --name base_centos centos:latest /bin/bash
[root@cf6b692adf02 /] 2.2 安装net-tools,iproute
net-tools 可以使用ifconfig等命令
# yum install -y net-tools
iproute 可以使用ip add 查看网络配置
# yum install -y iproute
3、sshd安装，及配置
3.1 安装openssh
# yum install -y openssh
[root# yum install -y openssh-server
[root# yum install -y openssh-clients
3.2 配置私钥
输入 命令显示如下，分别配置私钥。其中输入的地方全部选择enter键跳过
[root@cf6b692adf02 /]#/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
[root@cf6b692adf02 /]# ssh-keygen -t rsa -f /etc/ssh/ssh_host_rsa_key
Generating public/private rsa key pair.
Enter passphrase (empty for no passphrase): Enter same passphrase again: Your identification has been saved in /etc/ssh/ssh_host_rsa_key. Your public key has been saved in /etc/ssh/ssh_host_rsa_key.pub. The key fingerprint is: d6:46:9c:ef:bf:5d:45:95:59:50:b9:9b:fa:a6:1d:3d root@cf6b692adf02 The key's randomart image is: +--[ RSA 2048]----+ | .oO| | . . +.| | + o| | o . o | | S o . +| | . . . oo| | . .Eo| | o.o+| | .*+.| +-----------------+
# ssh-keygen -t ecdsa -f /etc/ssh/ssh_host_ecdsa_key
Generating private ecdsa key pair.
Enter in /etc/ssh/ssh_host_ecdsa_key. Your in /etc/ssh/ssh_host_ecdsa_key.pub. The key fingerprint is: 7f:ad:3b:5f:93:c2:6e:f0:05:f8:75:80:18:f8:ba:83 root@cf6b692adf02 The key's randomart image is: +--[ECDSA 256]---+ | ..o . | | . . . . | | . . . | | .. . ..| | S. . o .| | .. ..o ..| | . .. +ooo.| | E o .o+...| | . +=. | +-----------------+ [root@cf6b692adf02 /]#
[root@cf6b692adf02 /]# ssh-keygen -t ed25519 -f /etc/ssh/ssh_host_ed25519_key
Generating private ed25519 key pair.
Enter passphrase (empty for no passphrase): Enter same passphrase again: Your identification has been saved in /etc/ssh/ssh_host_ed25519_key. Your public key has been saved in /etc/ssh/ssh_host_ed25519_key.pub. The key fingerprint is: 44:93:0d:94:eb:e2:a4:3e:a3:fe:ab:e7:4f:2e:f0:44 root@cf6b692adf02 The key's randomart image is: +--[ED25519 256--+ | .== |
| .o.. |
| .. |
| E .. |
| . .S |
| . . o . |
| + +.. |
| Bo. |
| .+B=*o |
+-----------------+
[root@cf6b692adf02 /] 最后执行一次，再查看sshd进程，发现是启动的。
#ps -a | grep sshd
[root@cf6b692adf02 /]# /usr/sbin/sshd
[root@cf6b692adf02 /]# ps -ef | grep sshd
root 109 1 0 13:16 ? 00:00 /usr/sbin/sshd
root 128 22 ? 00 grep --color=auto sshd
[root@cf6b692adf02 /] 将sshd 加入开机自启(/etc/rc.d/rc.local)
#!/bin/bash
# THIS FILE IS ADDED FOR COMPATIBILITY PURPOSES
#
# It is highly advisable to create own systemd services or udev rules
# to run scripts during boot instead of using this file.
# In contrast to prevIoUs versions due to parallel execution during boot
# this script will NOT be run after all other services.
# Please note that you must run 'chmod +x /etc/rc.d/rc.local' to ensure
# that this script will be executed during boot.
touch /var/lock/subsys/local
/usr/sbin/sshd
4、tomcat 安装及配置
4.1 安装wget命令
#yum install -y wget
4.2 下载tomcat8
[root@cf6b692adf02 tmp]# wget http://mirrors.cnnic.cn/apache/tomcat/tomcat-8/v8.5.5/bin/apache-tomcat-8.5.5.tar.gz
4.3 安装tomcat8，并加入开机自启
5、jdk 安装配置
@cf6b692adf02
tmp]#wget http://download.oracle.com/otn-pub/java/jdk/8u101-b13/jdk-8u101-linux-x64.rpm?AuthParam=1475328855_221393517c76253d935635ef2ec114d1
[root#mv jdk-8u101-linux-x64.rpm?AuthParam=1475328855_221393517c76253d935635ef2ec114d1 jdk.rpm
[root#rpm -ivh jdk.rpm
Preparing... ################################# [100%]
Updating / installing...
1:jdk1.8.0_101-2000:1.8.0_101-fcs ################################# [100%]
Unpacking JAR files...
tools.jar...
plugin.jar...
javaws.jar...
deploy.jar...
rt.jar...
jsse.jar...
charsets.jar...
localedata.jar...
[root# java -version
java version "1.8.0_101"
Java(TM) SE Runtime Environment (build 0_101-b13)
Java HotSpot(TM) 64-Bit Server VM (build 25.101-b13,mixed mode)
[root jdk rpm安装在/usr/java/jdk1.8.0_101/jre/bin/java
5、写脚本启动关闭tomcat
5.1 安装vim
@cf6b692adf02
tomcat]# yum install vim* -y
五、
5.1 创建新的镜像文件
将之前做的容器弄成镜像文件，取名base:latest
[root@iZ25av9xi4hZ ~]# docker commit cf6b692adf02 base:latest
sha256:a90294e9b9b5b375c895ff32bfd34120797e8391bdbcbfa53b3792d636280f70
查看镜像下载所有的镜像文件
# docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
base latest a90294e9b9b5 2 minutes ago 934.9 MB
docker.io/centos latest 5.2创建tomcat_cl 容器，并设置其ssh对于宿主机器的10022端口，8080端口对应宿主机器的10088端口
# docker run -p 10022:22 -p 10088:8080 --name tomcat_cl -d base:latest /usr/sbin/sshd -D
e21a8af9269cd06b3950f59020de4d29723580c20bd35334ea6ff3fed28fb043
[root# docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
e21a8af9269c base:latest "/usr/sbin/sshd -D" 7 seconds ago Up 6 seconds 0.010022->22/tcp,10088->8080/tcp tomcat_cl
cf6b692adf02 centos:latest "/bin/bash" About an hour ago Up 10 minutes base_centos
[root 5.3 ssh登录容器
[root@iZ25av9xi4hZ ~]# ssh root@127.0.0.1 -p 10022
The authenticity of host '[0.1]:10022 ([10022)' can't be established. ECDSA key fingerprint is 7f:ad:3b:5f:93:c2:6e:f0:05:f8:75:80:18:f8:ba:83. Are you sure you want to continue connecting (yes/no)? yes Warning: Permanently added '[10022' (ECDSA) to the list of kNown hosts. root@0.1's password:
Permission denied,please try again.
开始没有创建密码，所以叫修改一下密码
# docker exec -it tomcat_cl /bin/bash
[root@e21a8af9269c /]# passwd
Changing password for user root.
New password:
BAD PASSWORD: The password is shorter than 8 characters
Retype new password:
passwd: all authentication tokens updated successfully.
[root@e21a8af9269c /]# exit
exit
[root@iZ25av9xi4hZ ~] 再次ssh ，可以正常进入
# ssh root@127.0.0.1 -p 10022
root@127.1's password: [root@e21a8af9269c ~]#
5.4 在宿主机器检查对应的映射端口
# ps -aux | grep 10022
root 17088 0 1.5 188360 15708 ? Sl 22:41 0:00 docker-proxy -proto tcp -host-ip 0 -host-port 10022 -container-ip 192.168.3 -container-port 22
root 17218 112660 960 pts/3 S+ 46 grep --color=auto 10022
[root@iZ25av9xi4hZ ~]# ps -aux | grep 10088
root 17079 131020 15652 ? Sl 10088 -container-ip 8080
root 17226 112664 47 10088
[root@iZ25av9xi4hZ ~] 进入容器去启动tomcat
@iZ
25av9xi4hZ ~]127.0.0.1 -p 10022
root@.1's password: [root@e21a8af9269c ~]# ps -ef | grep java root 178 162 14:52 pts/00 grep --color=auto java [root@e21a8af9269c ~]# /app/apache-tomcat-cl/bin/startup.sh Using CATALINA_BASE: /app/apache-tomcat-cl CATALINA_HOME: /app/apache-tomcat-cl CATALINA_TMPDIR: /app/apache-tomcat-cl/temp JRE_HOME: /usr CLAsspATH: /app/apache-tomcat-cl/bin/bootstrap.jar:/app/apache-tomcat-cl/bin/tomcat-juli.jar Tomcat started. [root193 1 56 02 /usr/bin/java -Djava.util.logging.config.file=/app/apache-tomcat-cl/conf/logging.properties -Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager -Djdk.tls.ephemeralDHKeySize=2048 -classpath /app/apache-tomcat-cl/bin/bootstrap.jar:/app/apache-tomcat-cl/bin/tomcat-juli.jar -Dcatalina.base=/app/apache-tomcat-cl -Dcatalina.home=/app/apache-tomcat-cl -Djava.io.tmpdir=/app/apache-tomcat-cl/temp org.apache.catalina.startup.Bootstrap start root 210 @e21a8af9269c ~]#
通过浏览器输入宿主ip：端口。可以看到tomcat运行起来了。