docker自定义镜像

环境准备：

[root@coker1 ~]# docker rm $(docker ps -qa)

de7658cf81e8

9f9d049bacf3

0bf9b1d0da01

89a4fdf6bbf4

64a3084c0680

 

自定义镜像：

 mkdir oo

 cd oo

    ls

   vim  Dockerfile

FROM centos:latest

RUN rm -f /etc/yum.repo.d/*.repo

ADD local.repo /etc/yum.repo.d/r.repo

RUN  yum install -y net-tools psmisc   vim-enhanced

:wq

 

  cp  /etc/yum.repos.d/dvd.repo   local.repo

 

 

[root@coker1 oo]# docker build -t centos:latest    .    //必须加 .

 

 

 

基于自定以的镜像，封装应用：

[root@coker1 oo]# cd ~

[root@coker1 ~]# mkdir xx

[root@coker1 ~]# cd xx

[root@coker1 xx]# ls

[root@coker1 xx]# docker images

[root@coker1 xx]# vim  Dockerfile

FROM  centos:latest

CMD ["/usr/bin/python"]

:wq

 

[root@coker1 xx]# docker  build -t centos:python .

Sending build context to Docker daemon 2.048 kB

Step 1 : FROM centos:latest

 ---> 72e49259bbd0

Step 2 : CMD /usr/bin/python

 ---> Running in 8b6218b82c85

 ---> 1da1e1ac94f8

Removing intermediate container 8b6218b82c85

Successfully built 1da1e1ac94f8

 

[root@coker1 xx]# docker images 

REPOSITORY          TAG                 IMAGE ID            CREATED              SIZE

centos              python              1da1e1ac94f8        About a minute ago   346.3 MB

centos              latest              72e49259bbd0        11 minutes ago       346.3 MB

 

docker 封装应用(手动操作）：

[root@coker1 ooxx]# docker run -it centos

[root@f35180402068 /]# yum search openssh    //发现软件

[root@f35180402068 /]# yum -y install openssh-server  //安装软件

 

[root@f35180402068 /]# echo 11 |  passwd --stdin root

Changing password for user root.

passwd: all authentication tokens updated successfully.

[root@f35180402068 /]# systemctl  start sshd

Failed to get D-Bus connection: Operation not permitted

[root@f35180402068 /]# cd /usr/lib/systemd/system

[root@f35180402068 system]# cat sshd.server

cat: sshd.server: No such file or directory

[root@f35180402068 system]# cat sshd.service

[Unit]

Description=OpenSSH server daemon

Documentation=man:sshd(8) man:sshd_config(5)

After=network.target sshd-keygen.service

Wants=sshd-keygen.service

 

[Service]

Type=notify

EnvironmentFile=/etc/sysconfig/sshd

ExecStart=/usr/sbin/sshd -D $OPTIONS

ExecReload=/bin/kill -HUP $MAINPID

KillMode=process

Restart=on-failure

RestartSec=42s

 

[Install]

WantedBy=multi-user.target

 

[root@f35180402068 system]# echo $OPTIONS

 

[root@f35180402068 system]# /usr/sbin/sshd -D

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

sshd: no hostkeys available -- exiting.

[root@f35180402068 system]# cd /etc/ssh/

[root@f35180402068 ssh]# ls

moduli  sshd_config

[root@f35180402068 ssh]# sshd-keygen  

/usr/sbin/sshd-keygen: line 10: /etc/rc.d/init.d/functions: No such file or directory

Generating SSH2 RSA host key: /usr/sbin/sshd-keygen: line 63: success: command not found

 

Generating SSH2 ECDSA host key: /usr/sbin/sshd-keygen: line 105: success: command not found

 

Generating SSH2 ED25519 host key: /usr/sbin/sshd-keygen: line 126: success: command not found

 

[root@f35180402068 ssh]# ls

moduli                  ssh_host_ed25519_key      ssh_host_rsa_key.pub

ssh_host_ecdsa_key      ssh_host_ed25519_key.pub  sshd_config

ssh_host_ecdsa_key.pub  ssh_host_rsa_key

[root@f35180402068 ssh]# /usr/sbin/sshd -D

^C

[root@f35180402068 ssh]# ifconfig 

eth0: flags=4163  mtu 1500

        inet 172.17.0.2  netmask 255.255.0.0  broadcast 0.0.0.0

        inet6 fe80::42:acff:fe11:2  prefixlen 64  scopeid 0x20

        ether 02:42:ac:11:00:02  txqueuelen 0  (Ethernet)

        RX packets 506  bytes 1135916 (1.0 MiB)

        RX errors 0  dropped 0  overruns 0  frame 0

        TX packets 508  bytes 40748 (39.7 KiB)

        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

 

lo: flags=73  mtu 65536

        inet 127.0.0.1  netmask 255.0.0.0

        inet6 ::1  prefixlen 128  scopeid 0x10

        loop  txqueuelen 1  (Local Loopback)

        RX packets 0  bytes 0 (0.0 B)

        RX errors 0  dropped 0  overruns 0  frame 0

        TX packets 0  bytes 0 (0.0 B)

        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

[root@4ecd2c26a020 ssh]# /usr/sbin/sshd -D    //另外一个终端连接容器必须启动服务：

 

 

从另外一个终端连接服务：

 

[root@room9pc01 ~]# ssh 192.168.1.50

[email protected]'s password: 

Last login: Tue Aug 21 22:27:02 2018 from 192.168.1.254

[root@coker1 ~]# ssh 172.17.0.2

The authenticity of host '172.17.0.2 (172.17.0.2)' can't be established.

ECDSA key fingerprint is SHA256:s6AUXgR6Tv0QDtvNuKOgE32dyJ4lPKNJtXlFnsyBttM.

ECDSA key fingerprint is MD5:70:c6:3c:60:ac:9d:5e:1e:dd:3c:e8:a4:d5:44:ed:44.

Are you sure you want to continue connecting (yes/no)? yes

Warning: Permanently added '172.17.0.2' (ECDSA) to the list of known hosts.

[email protected]'s password: 

[root@4ecd2c26a020 ~]# logout

Connection to 172.17.0.2 closed.

 

 

自动封装程序：

[root@coker1 ooxx]# vim Dockerfile 

 

FROM centos

RUN yum -y install openssh-server

RUN  echo 11 |  passwd --stdin root

RUN sshd-keygen

ENV  EnvironmentFile=/etc/sysconfig/sshd

CMD [" /usr/sbin/sshd"," -D"]

：wq

[root@coker1 ooxx]# docker build -t centos:sshd .

Successfully built a550c02ecc83

 

[root@coker1 ooxx]# docker run -d centos:sshd

2ee4a3650a26052ff95ac3475036484c146bd5f7440a2d48128215a7291a8d5e

[root@coker1 ooxx]# docker inspect  2ee4a3

[root@coker1 ooxx]  ssh 172.17.0.2