Compose: tmpfs: Allow different sizes

Created on 17 Apr 2016 · 7Comments · Source: docker/compose

When using --tmpfs in docker-run I can specify the maximum size (64M for a temporary folder may be ridiculously low depending on the usecase). However, apparently there is no way to do the same from a compose file.

areconfig kinparity

Source

ThiefMaster

👍3

Most helpful comment

Try docker-compose.yml like this:

version: '2.1'
services:
  test:
    image: alpine
    tmpfs:
      - /tmp:size=1G

Test: docker-compose run test df | grep /tmp

verglor on 9 Jan 2018

👍3 ❤2

All 7 comments

@ThiefMaster this is already possible, you just use the mountpoint:options format as with docker-run

ghost on 18 Apr 2016

Despite reading the doc, I concluded the same of @ThiefMaster .
Can we update the Compose File Reference section for 'tmpfs',
so this behavior is documented more clearly?

rapha-opensource on 13 Aug 2016

👍4

@ghost
can you give us an example?

insikk on 9 Jan 2018

Try docker-compose.yml like this:

version: '2.1'
services:
  test:
    image: alpine
    tmpfs:
      - /tmp:size=1G

Test: docker-compose run test df | grep /tmp

verglor on 9 Jan 2018

👍3 ❤2

this is certainly a better design than implemented in #5637. if someone added this to the reference docs for the appropriate versions, it would be great.

funkyfuture on 18 Feb 2018

Can I use this syntax on Docker Swarm mode?

darron1217 on 1 Jun 2018

This seems to have been fixed somewhere along the line:

$ cat > 3339.yaml
version: '2.1'
services:
  test:
    image: alpine
    tmpfs:
      - /tmp:size=1G
$ docker-compose -f 3339.yaml run test df | grep /tmp
Creating network "compose_default" with the default driver
tmpfs                  1048576         0   1048576   0% /tmp
$ docker-compose -f 3339.yaml run test df -h | grep /tmp
tmpfs                     1.0G         0      1.0G   0% /tmp