docker安装centos镜像

李正文 發表於 2021-3-1 12:11:00

1、查找镜像源
$ docker search centos
NAME DESCRIPTION STARS OFFICIAL
centos The official build of CentOS. 3857 
 
 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
 #
 #
 
 6、centos默认没有ifconfig命令，配置ifconfig
 # ifconfig
 bash: ifconfig: command not found
 # 
 # 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
 #
 #
 # yum install net-tools.x86_64
 # 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
 # passwd Changing password for user root.New password: 123456 BAD PASSWORD: The password is shorter than 8 charactersRetype new password: 123456 passwd : all authentication tokens updated successfully.
 b、安装openssh
 yum install openssh-server -y
  c、生成公钥、私钥
 # 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 || |+-----------------+
 # 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|| . . || |+-----------------+
 # 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
 #
 #
 $ 
 $ 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 
来源：https://www.cnblogs.com/yanzi2020/p/14462874.html

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docker安装centos镜像