Docker Volumes Management

Con­tain­ers

De­vOps and SRE

Ba­sic com­mands

docker volume

Usage:  docker volume COMMAND

Manage volumes

Commands:
  create      Create a volume
  inspect     Display detailed information on one or more volumes
  ls          List volumes
  prune       Remove all unused local volumes
  rm          Remove one or more volumes

Run 'docker volume COMMAND --help' for more information on a command.

docker volume create volume_name

docker volume ls

docker volume inspect volume_name

sudo ls -la /var/lib/docker/volumes/

docker volume (rm|prune) volume_name

Ex­pla­na­tions

Note when you are us­ing dock­er com­pose, un­less spec­i­fy path in the left side on the ser­vices: con­tain­er-name: vol­umes: sec­tion dock­er will au­to­mat­i­cal­ly cre­ate a vol­ume /​​​var/​​​lib/​​​do­ck­er/​​​vo­lu­mes/​​​ named af­ter the con­tain­er-name un­der­score _ and the name of the vol­ume.

Ex­am­ples

In Ex­am­ple 1 the con­tain­ers di­rec­to­ry :/​​​data will be bound (mount­ed) to the di­rec­to­ry ./​​​base with­in the cur­rent di­rec­to­ry where the docker-compose.yml is lo­cat­ed. In this case no vol­ume is spec­i­fied.

example 1

docker-compose.yml

version: "3"
services:
  container-name:
    image: image_name
    volumes:
    - ./base:/data

In Ex­am­ple 2 the di­rec­to­ry used as a vol­ume is /var/lib/­dock­er/vol­umes/­con­tain­er-name_base/ and it will be au­to­mat­i­cal­ly cre­at­ed un­less some ad­di­tion­al op­tions are spec­i­fied with­in the vol­umes: sec­tion. The ac­tu­al di­rec­to­ry :/​​​data of the con­tain­er will be bound to /var/lib/­dock­er/vol­umes/­con­tain­er-name_base/_­da­ta

example 2

docker-compose.yml

version: "3"
services:
  container-name:
    image: image_name
    volumes:
    - base:/data
volumes:
  base:

Ref­er­ences

• Dock­er: Man­u­als > Dock­er En­gine > Stor­age > Vol­umes

• Dock­er: Ref­er­ence > Com­pose file ref­er­ence > Com­pose spec­i­fi­ca­tion > Vol­umes top-lev­el el­e­ment

Reg­is­ter: Con­tain­ers

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24.05.2023

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