How to install docker
This article mainly introduces how to install docker, has a certain reference value, interested friends can refer to, I hope you can learn a lot after reading this article, the following let the editor take you to understand it.
Operating system: centos 6.5
1. Install: 1. Configure Epel source: yum install-y yum-priorities & & rpm- ivh http://dl.fedoraproject.org/pub/epel/6/x86_64/epel-release-6-8.noarch.rpm & & rpm--import / etc/pki/rpm-gpg/RPM-GPG-KEY-EPEL-62, install docker-io febootstrap
# tools used by febootstrap to create centos images
Yum install docker-io febootstrap-y3. Hang cgroup file system vim / etc/fstab after installation: add a line: none / sys/fs/cgroup cgroup defaults 004, restart the system: reboot
Docker starts automatically after booting. If it doesn't start, you can start it manually: docker-d &
2. Let's make a Centos 6.5. create a CentOS image file using febootstrap. Centos6-image directory febootstrap-I bash-I wget-I yum-I iputils-I iproute-I man-I vim-I openssh-server-I openssh-clients-I tar-I gzip centos6 centos6-image http://mirrors.aliyun.com/centos/6/os/x86_64/
# Parameter description:
The tools that need to be installed in the-I image: pass the parameters after-I to yum to implement the installation, on which the ssh service is installed
Centos6 is the centos version
Centos6-image is the specified directory
After the command is executed, a directory centos6-image is generated under the current directory
Bash-4.1.2#bash-4.1.2#bash-4.1.2# ls bin boot dev etc home lib lib64 media mnt opt proc root sbin selinux srv sys tmp usr varbash-4.1.2# ls-a root
There are no files or hidden dot files in the root directory, such as .bash _ logout .bash _ profile .bashrc.
If the image created at this time uses ssh to log in, it will go directly to the root directory, as follows:
Bash-4.1.2#bash-4.1.2#bash-4.1.2# ls bin boot dev etc home lib lib64 media mnt opt proc root sbin selinux srv sys tmp usr varbash-4.1.2# ls-a root. ..
To avoid this, you can set the .bash _ logout .bash _ profile .bashrc files in the root directory of the centos6-image directory.
Cd centos6-image & & cp etc/skel/.bash* root/
In this way, the remote login can be realized normally.
Based on this implementation, we can configure some complex configuration files in advance and put them in a directory, and then call them through the Dockerfile file, which can be completed quickly.
2. Let's create a basic image cd centos6-image & & tar-c. | docker import-centos6-base
When the command is complete, use docker images to view
Docker imagesREPOSITORY TAG IMAGE ID CREATED VIRTUAL SIZEcentos6-base latest a01c3d440db8 1 minutes ago 311.3 MB
At this point, a basic mirror has been completed.
3. Let's use the Dockerfile file to create an image that can be logged in by ssh
The Dockefile file is as follows:
# DockerfileFROM centos6-baseMAINTAINER zhou_mfk RUN ssh-keygen-Q-N ""-t dsa-f / etc/ssh/ssh_host_dsa_keyRUN ssh-keygen-Q-N ""-t rsa-f / etc/ssh/ssh_host_rsa_keyRUN sed-ri 's/session required pam_loginuid.so/#session required pam_loginuid.so/g' / etc/pam.d/sshdRUN mkdir-p / root/.ssh & & chown root.root / root & & chmod 700 / root/.sshEXPOSE 22RUN echo 'root:redhat' | chpasswdRUN yum install-y yum-priorities & & rpm- ivh http://dl.fedoraproject.org/pub/epel/6/x86_64/epel-release-6-8.noarch.rpm & & rpm--import / etc/pki/rpm-gpg/RPM-GPG-KEY-EPEL-6RUN yum install tar gzip gcc vim wget-yENV LANG en_US.UTF-8ENV LC_ALL en_US.UTF-8CMD / usr/sbin/sshd-D#End
For instructions on Dockerfile, please see Docker series related blog posts and Dockerfile files for details.
4. Use the above Dockerfile file to create a ssh login image docker build-t centos6-ssh.
Build: Build a container from a Dockerfile this is to create a container from the Dockerfile file
Docker build looks for a configuration file named Dockerfile under the path path, and uses this configuration to generate a new image
. Indicates that in the current directory
Docker build-t centos6-ssh / root/images/abc this means that the Dockerfile file is under: / root/images/abc
After the command is executed, the centos6-ssh image is created.
Check it out:
Docker images
REPOSITORY TAG IMAGE ID CREATED VIRTUAL SIZE
Centos6-ssh latest b8ca70e7adee 1 hours ago 311.3 MB
Centos6-base latest a01c3d440db8 2 hours ago 311.3 MB
Let's create a container to log in:
Docker run-d-p 127.0.0.1 2222 22 centos6-ssh
Ssh root@127.0.0.1-p 2222
Enter password: redhat
[root@a856a3c242cf ~] #
[root@a856a3c242cf ~] #
[root@a856a3c242cf ~] # ls
[root@a856a3c242cf ~] #
[root@a856a3c242cf ~] # cat / etc/issue
CentOS release 6.5 (Final)
Kernel\ r on an\ m
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