canonical/multipass

[launch] Mount options silently dropped on timeout

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#4831 opened on Apr 17, 2026

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bugcloud-inithelp wantedlowlow hanging fruit

Description

Describe the bug The mount options are silently dropped on timeout

To Reproduce How, and what happened?

  1. multipass launch -n a --timeout 5 --mount ~/dir:/mnt/dir
  2. Error does not mention the missed mounts, even if the instance eventually reaches the running state.

Expected behavior Multipass should clarify to the user that the mount flags are dropped if the mount initialization part is not reached.

Additional info

  • OS: Ubuntu 24.04
  • CPU architecture or model: amd64
  • multipass version: 1.17.0-dev

Contributor guide

Tech stack
cpp
Domain
clibackend
Issue type
bug
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
half day
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
fresh
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
clear
Prerequisites
C++Multipass codebasemount logic
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
60
Research direction
Investigate the mount initialization code path in Multipass to understand why mount options are dropped on timeout. Check the timeout handling logic to ensure that mount flags are preserved and an appropriate error is shown. Look in the mount related source files for the logic that initializes mounts and handles timeouts.