The agent installer (scripts/install.sh) had no free-space preflight, so on
RAM-rooted appliances (QNAP QTS, Unraid) it ran all the way to the download
before dying with an unhelpful ENOSPC. Lift the server installer's disk
headroom check into the agent installer: verify temp and install-dir space
(including the shared-filesystem case) before downloading and in
--preflight-only mode, with a TMPDIR hint in the failure message.
The QNAP and Unraid watchdog loops also shell-appended agent stdout to
/var/log/pulse-agent.log with no rotation, which could fill the RAM root on
its own. Pass --log-file so the agent's rotating writer engages (QNAP: data
volume state dir; Unraid: /var/log/pulse-agent with size-capped rotation),
discard the now-duplicate stdout mirror, and keep the watchdogs' own messages
in a small self-trimming log.
Document the TMPDIR override for constrained roots in docs/UNIFIED_AGENT.md.
Fixes#1617 (space half; CPU half pending reporter diagnostics)
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
courtmanr@gmail.com
0b9385f2f2