mode option in tmpfs volume is ignored
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- Dominant language
- Go
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Description
The mode option of tmpfs volumes is ignored in swarm mode.
compose.yaml:
volumes:
- type: tmpfs
target: /run
tmpfs:
size: 268435456
mode: 1777
But in the resulting container the mode is not applied:
root@feb5df8c8de1:/# ls -ld /run/
drwxr-xr-x 4 root root 100 Nov 10 20:25 /run/
# dockerd -v
Docker version 28.5.2, build 89c5e8f
Contributor guide
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Start by reproducing the compose.yaml example in swarm mode and inspect the resulting /run permissions. Then trace tmpfs volume handling in the Go source to find where mode is lost; done means mode: 1777 is reflected in the resulting container.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- docker, go
- Domain
- distributed-systems, infrastructure
- Issue type
- Bug
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 45/100