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Bubblewrap sandbox executor plugin for Docketeer

Project description

docketeer-bubblewrap

Sandboxed command execution for Docketeer using bubblewrap (bwrap).

This plugin provides a CommandExecutor implementation that runs external programs inside a lightweight Linux sandbox using unprivileged user namespaces. Each process gets its own PID, UTS, IPC, and cgroup namespaces, and network access is denied by default. The --die-with-parent flag ensures sandboxed processes are cleaned up if the parent exits.

Requirements

  • Linux with unprivileged user namespaces enabled
  • bwrap on PATH (install via your distro's bubblewrap package)

How it works

The executor builds a minimal filesystem view inside the sandbox:

  • Read-only binds for system directories (/usr, /bin, /lib, /etc/ssl, etc.)
  • /proc, /dev, and a tmpfs /tmp
  • User-specified mounts (read-only or writable)
  • Optional network access via --share-net

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