nestybox / nestybox/sysbox

Sysbox 0.7.0 not working on ubuntu 26.04

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Description

Since upgrade from ubuntu 24.04 to ubuntu 26.04 sysbox cease to work, i got this message when trying to launch my stack with docker compose

Error response from daemon: failed to create task for container: failed to create shim task: OCI runtime create failed: failed to pre-register with sysbox-fs: failed to pre-register container with sysbox-fs: rpc error: code = Internal desc = Initialization error for container-id

And when I verify the log of sysbox-fs with journactl -u sysbox-fs I found:

sysbox-fs[20604]: 2026/04/27 23:43:05 mount helper error: fusermount3: mount failed: Permission denied
sysbox-fs[20604]: time="2026-04-27 23:43:05" level=error msg="fusermount: exit status 1"

I try several thing like reinstall sysbox even full uninstall and then reinstall, restart sysbox sysbox -fs and sysbox-mgr, reloading fuse but nothing seems to work

Contributor guide

Open the contributing guide

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start by reproducing the failure on Ubuntu 26.04 with the reported Docker Compose stack, then inspect the sysbox-fs and sysbox-mgr services and their journalctl output. Use the fusermount3 permission error as the first lead; done means identifying the Ubuntu compatibility or configuration cause and restoring container startup.

Written by the indexing model from the issue text.

Assessment

Tech stack
docker, docker-compose, linux, shell, ubuntu
Domain
devops, infrastructure, operating-systems
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Quiet
Clarity
Needs clarification
Newbie friendliness
45/100

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