Merged
Conversation
added 4 commits
March 8, 2026 01:32
Mount container root filesystem as read-only with tmpfs at /tmp, /run, and /home/developer for writable paths. Configurable via CLI flag or config file. Off by default for compatibility.
Add unit tests for build_container_config read-only logic covering: - default disabled state (no read_only, no tmpfs) - CLI --read-only flag enables read-only + tmpfs mounts - config container.read_only enables read-only + tmpfs mounts - either CLI or config enables the feature (OR semantics)
Non-base images (e.g., fedora:43) run as root with home at /root, which remained read-only — breaking shell history and dotfiles.
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
1 participant
Add this suggestion to a batch that can be applied as a single commit.This suggestion is invalid because no changes were made to the code.Suggestions cannot be applied while the pull request is closed.Suggestions cannot be applied while viewing a subset of changes.Only one suggestion per line can be applied in a batch.Add this suggestion to a batch that can be applied as a single commit.Applying suggestions on deleted lines is not supported.You must change the existing code in this line in order to create a valid suggestion.Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be applied on multi-line comments.Suggestions cannot be applied while the pull request is queued to merge.Suggestion cannot be applied right now. Please check back later.
Summary
--read-onlyCLI flag andcontainer.read_onlyconfig option to mount the container root filesystem as read-only/tmp,/run, and/home/developerfor writable paths when enabledCloses #29
Test plan
cargo test— 277 unit + 13 integration tests passcargo clippy— no warningsmino run --read-only -- ls— verify--read-onlyand--tmpfsin podman args (-vv)mino run --read-only -- touch /test— confirm read-only root fs rejects writesmino run --read-only -- touch /tmp/test— confirm tmpfs mounts are writable