docker上安装centos镜像，dockercentos镜像

docker上安装centos镜像，dockercentos镜像

1、查找镜像源 $ docker search centos NAME DESCRIPTION STARS OFFICIAL centos The official build of CentOS. 3857 [OK]
2、下载镜像 docker pull centos
3、查看已下载的镜像 $ docker image ls REPOSITORY TAG IMAGE ID CREATED SIZE centos latest 3fa822599e10 6 days ago 204MB
4、启动镜像 $ docker run -itd centos /bin/bash bce6d9a692b26fdf5f7642303c26ffdcaf26917cbfde703dea5c152c320f375d $ docker ps CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS bce6d9a692b2 centos "/bin/bash" About a minute ago Up About a minute
5、进入centos容器 $ docker attach bce6d9a692b2 [root@bce6d9a692b2 /]# [root@bce6d9a692b2 /]#
6、centos默认没有ifconfig命令，配置ifconfig [root@bce6d9a692b2 /]# ifconfig bash: ifconfig: command not found [root@bce6d9a692b2 /]# [root@bce6d9a692b2 /]# yum search ifconfig Loaded plugins: fastestmirror, ovl base | 3.6 kB 00:00:00 extras | 3.4 kB 00:00:00 updates | 3.4 kB 00:00:00 (1/4): extras/7/x86_64/primary_db | 130 kB 00:00:01 (2/4): base/7/x86_64/group_gz | 156 kB 00:00:01 (3/4): updates/7/x86_64/primary_db | 3.8 MB 00:00:17 (4/4): base/7/x86_64/primary_db | 5.7 MB 00:00:21 Determining fastest mirrors * base: centos.ustc.edu.cn * extras: centos.ustc.edu.cn * updates: mirrors.aliyun.com ==================================================== Matched: ifconfig ================================================== net-tools.x86_64 : Basic networking tools [root@bce6d9a692b2 /]# [root@bce6d9a692b2 /]# [root@bce6d9a692b2 /]# yum install net-tools.x86_64 [root@bce6d9a692b2 /]# ifconfig eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500 inet 172.17.0.3 netmask 255.255.0.0 broadcast 0.0.0.0 ether 02:42:ac:11:00:03 txqueuelen 0 (Ethernet) RX packets 7560 bytes 11081500 (10.5 MiB) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 5595 bytes 305703 (298.5 KiB) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
7、配置ssh a、修改Centos root密码 # passwdChanging password for user root.New password: 123456BAD PASSWORD: The password is shorter than 8 charactersRetype new password: 123456passwd: all authentication tokens updated successfully. b、安装openssh yum install openssh-server -y  c、生成公钥、私钥 [root@378ab88a06c8 /]# ssh-keygen -t rsa -f /etc/ssh/ssh_host_rsa_keyGenerating public/private rsa key pair.Enter passphrase (empty for no passphrase): (直接回车)Enter same passphrase again: (直接回车)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:33:3c:34:49:e4:76:7d:45:cc:69:ac:46:85:ab:27:9e root@378ab88a06c8The key's randomart image is:+--[ RSA 2048]----+| .o +=+|| o . . o =o|| * . o = || + o = || S o || + o . || . + || E || |+-----------------+ [root@378ab88a06c8 /]# ssh-keygen -t rsa -f /etc/ssh/ssh_host_ecdsa_keyGenerating public/private rsa key pair.Enter passphrase (empty for no passphrase): (直接回车)Enter same passphrase again: (直接回车)Your identification has been saved in /etc/ssh/ssh_host_ecdsa_key.Your public key has been saved in /etc/ssh/ssh_host_ecdsa_key.pub.The key fingerprint is:09:ac:b0:61:55:de:e8:4f:5e:20:d9:fc:1e:b6:d7:79 root@378ab88a06c8The key's randomart image is:+--[ RSA 2048]----+| ... || . o * || + B = || . + o o + || . . . S = || + + o . . || o o . o E|| . . || |+-----------------+ [root@378ab88a06c8 /]# ssh-keygen -t rsa -f /etc/ssh/ssh_host_ed25519_keyGenerating public/private rsa key pair.Enter passphrase (empty for no passphrase): (直接回车)Enter same passphrase again: (直接回车)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:63:0d:b5:fb:55:a4:56:47:43:6d:68:c0:47:2e:84:24 root@378ab88a06c8The key's randomart image is:+--[ RSA 2048]----+| E.ooooo=*|| o.o..++=|| . . .o+..|| o . o . || S o . || . . . . || . || || |+-----------------+
d、编写启动脚本 # vi /run.sh#!/bin/bash/usr/sbin/sshd -D# chmod +x /run.sh

e、退出容器，保存镜像 $ docker ps CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS bce6d9a692b2 centos "/bin/bash" About a minute ago Up About a minute #从容器退出，但不停止容器: Ctrl+P+Q [root@default ~]# [root@default ~]# $ $ docker ps
#回到Docker下面，停止容器: docker stop <容器ID> $ docker stop bce6d9a692b2 bce6d9a692b2 #提交当前容器到镜像: docker commit <容器ID> <NAME:VERSION>
$ docker commit bce6d9a692b2 centos_me:v1.0 $ docker image ls REPOSITORY TAG IMAGE ID CREATED SIZE centos_me v1.0 4569dd302889 38 minutes ago 366MB
f、重新启动容器 $ docker run --net=host --name hdoop0 -d -p 5001:22 centos_me:v1.0 /run.sh 备注：1、“-p 5001:22” 是将容器的ssh端口22映射都宿主主机的5001端口上 2、‘--name hdoop0’重命名容器名
或者：docker run --name hadoop2 -d -p 5002:22 centos_me:v1.0 /usr/sbin/sshd -D
g、远程连接测试

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