Shulou(Shulou.com)06/02 Report--

Taking the jenkins container as an example, three methods are introduced here.

Method one

Package the container into an image, and the data will be in the image. Im:1.0 is the name of the container, so you can take whatever you want.

Docker commit im:1.0

Rerun the mirror, and-v map the tmp directory in the container to the tmp directory on the host

Docker run-itd-v / tmp:/tmp im:1.0 / / the first tmp is the host directory, and the second is the directory in the container

Copy the file of / var/jenkins_home to tmp. Note that the container name here is randomly generated and can be viewed through docker ps | grep im:1.0.-it is an interactive terminal.

Docker exec-it cp-r / var/jenkins_home / tmp / / cp copy and paste

Go to the tmp directory to see if there is an extra jenkins_home directory

Cd / tmpls

Enter the jenkins_home directory and move the content to the home, srv and other directories. Because the tmp directory is temporarily saved, the next linux restart will be deleted, so the data can be persisted.

Cd jenkins_home/mv

Note that after the data is backed up, delete the extra containers just generated.

Docker stop & & docker rm

Method two

Introduction of official documents

Execute the following command, for the running container name,-v mapping, / tmp/backup directory is randomly specified, cvf compression, / var/jenkins_home is the directory to be backed up

Docker run-rm-volumes-from-v / tmp/backup:/backup ubuntu tar cvf / backup/backup.tar / var/jenkins_home

Then go to the backup directory and you will see the compressed files above

Cd tmp/backup/ls

Decompression

Tar xvf backup.tar

After decompressing, there will be one more var file. When you enter it, you can see the jenkins_home directory, which is the same as the data backed up by method 1. Use the mv command to move to another directory.

Cd var/jenkins_homemv

Compared to the first method, using-- rm, we do not need to worry about resource recycling.

Method three

Before trying the third method, let's go to the tmp directory and delete the jenkins_home and backup directories

Rm-rf jenkins_home/ backup/

View Container id

Docker ps | grep jenkins_im

Copy the jenkins_home directory of the container to the current tmp directory

Docker cp: var/jenkins_home / tmp/

Enter tmp to see if there is a jenkins_home.

Cd tmp/ls

When you enter jenkins_home, you will see the same data as before, and finally the same operation will be done. Move the content to another directory.

Mv

So far, this is the end of this article on how to copy and back up docker container data. for more information about copying and backing up docker container data, please search for previous articles or continue to browse the following related articles. I hope you will support it in the future!

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