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Where is the docker container volume usually placed? The data volume is presented to the docker container in the form of a directory that supports sharing among multiple containers, and modifications do not affect the image. Data volumes that use Docker are similar to mounting a file system in a system using mount.

A data volume is a specially designated directory that leverages the container's UFS file system to provide some stable features or data sharing for the container.

To create a data volume, you can create one data volume as long as the-v parameter is followed by the docker run command, or you can create multiple data volumes with multiple-v parameters. Once you have created a container with a data volume, you can mount the data volume in other containers with the-volumes-froms parameter.

Add new data volume

Docker run-d-v / tmpd/busyboxtest-- name busyboxtest busybox

The-v parameter creates a new container volume under / tmp/busybox of the container

View the location of the data volume through the docker inspect command

Docker inspect busyboxtest | grep volumes "/ tmp/busyboxtest": "/ var/lib/docker/volumes/577784c9e8aa3fba15ebf56ee680b6fea50aafe60bd753b64c3699e461fa3e39/_data"

Mount the host directory as a data volume

Docker run-tid-v / tmp/volumetest:/data:ro-- name busyboxtest2 busybox

Mount the / tmp/volumetest of the host under / data in the way of ro

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