


Linux and Docker: How to perform persistent storage and data management of containers?
Jul 29, 2023 am 11:49 AMLinux and Docker: How to perform persistent storage and data management of containers?
In the application of containerization technology, the persistent storage and data management of containers are a very important part. This article will introduce how to implement persistent storage of containers in Linux and Docker, and provide corresponding code examples.
1. Container persistent storage in Docker
In Docker, containers are created through images, and the images themselves are read-only. Therefore, when the container is deleted, the data inside it will also be lost. In order to implement persistent storage of containers, we can use the following methods.
- Using Data Volume (Volume)
Data volume is one of the most commonly used persistent storage methods in Docker. By creating a data volume and mounting it to the specified path of the container, we can achieve persistent storage of container data.
First, we create a data volume:
$ docker volume create myvolume
Then, we can mount the data volume into the container through the docker run
command, as shown below:
$ docker run -v myvolume:/data myimage
In this way, the /data
path in the container will be mapped to the data volume named myvolume
. When the container is deleted, the data volume will not be automatically deleted and the data will be retained.
- Using Bind Mount
Bind mounting refers to mounting a directory on the host to a specified path in the container, thereby Implement persistent storage of container data.
We can bind mount through the docker run
command, as shown below:
$ docker run -v /host/path:/container/path myimage
In this way, /host/path## on the host #The directory will be mapped to the
/container/path path in the container. When the container is deleted, the data on the host will remain.
- Using a shared file system
$ mkfs.ext4 /dev/sdb1Then, we can use the
mount command to The file system is mounted to the specified path in the container:
$ mount /dev/sdb1 /container/pathIn this way, the
/container/path path in the container will be mounted as a shared file system. When the container is deleted , the data will be retained.
- Using Storage Volume Manager
$ apt-get install lvm2Next, we can use the
lvcreate command to create a logical Volume (Logical Volume):
$ lvcreate -L 1G -n myvolume myvgIn this way, we created a logical volume with a size of 1GB and named it
myvolume.
mkfs command to create a file system on the logical volume:
$ mkfs.ext4 /dev/myvg/myvolumeFinally, we can use the
mount command to The logical volume is mounted to the specified path in the container:
$ mount /dev/myvg/myvolume /container/pathIn this way, the
/container/path path in the container will be mounted as a logical volume. When the container is deleted, the data will remain.
- Docker Documentation: https://docs.docker.com/storage/
- Linux Documentation: https://www.kernel. org/doc/html/latest/admin-guide/devices/lvm.html
The above is the detailed content of Linux and Docker: How to perform persistent storage and data management of containers?. For more information, please follow other related articles on the PHP Chinese website!

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