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fix(onboarding): identity read that survives a rewrite, disk refused before the pull — 0.1.8

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Three faults from one agent-managed onboarding (env-dev-08, 2026-09-09), each of which pointed
the diagnosis away from the actual fault.

1. install.sh granted the agent's read on the ziti identity with a POSIX ACL. ziti-edge-tunnel
   rewrites that file on a controller config update and the rewrite drops the ACL: the agent
   applied cleanly at 01:21 and was failing every tick by 01:32. Group membership survives the
   rewrite (the file stays ziti:ziti 0640), so install.sh and the package postinstall now add
   monky-deployd to the `ziti` group, and a default ACL on the identity directory carries the
   grant onto a newly created file. The explicit ACLs stay for the boxes that need them.

2. openziti.load() accepts an unreadable or malformed identity: the C SDK logs "configuration is
   invalid" and returns a context that only fails at dial, as a bare TypeError, which the
   transport reported as a missing intercept or a policy gap. The SDK transport now reads and
   parses the identity itself and names the real fault first.

3. The disk pre-flight ran only when the bundle declared disk_need_bytes, so a bundle without one
   died mid-pull with containerd's "no space left on device" — which reads as a registry fault.
   A bundle that declares no size now has to clear the headroom floor, and the pre-flight measures
   containerd's root as well as the docker data-root: docker 29 keeps image layers in the
   containerd image store, and on env-dev-08 those sat on different filesystems (93 GiB free where
   the agent looked, 2.8 GiB where the pull wrote).

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01KLB7jieMNRkTsJ2epr4Ds1
This commit is contained in:
Marcos Della
2026-09-09 01:48:49 +00:00
parent cc9dcebd7e
commit 43615a6fda
14 changed files with 261 additions and 15 deletions
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packaging/scripts/postinstall.sh
+5
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@@ -13,6 +13,11 @@ install -d -m 0700 -o monky-deployd -g monky-deployd /var/lib/monky-deployd
install -d -m 0750 -o root -g monky-deployd /etc/monky-deployd
# the agent drives docker compose: docker group membership (no root)
if getent group docker >/dev/null; then usermod -a -G docker monky-deployd || true; fi
# the agent reads the host's ziti identity (owned by the tunneller, mode 0640). ziti-edge-tunnel
# REWRITES that file whenever the controller sends a config update, and the rewrite drops any
# POSIX ACL granting the agent read — group membership is the grant that survives it.
# (env-dev-08, 2026-09-09: the agent went from applied to "no intercept" 6 minutes after a refresh.)
if getent group ziti >/dev/null; then usermod -a -G ziti monky-deployd || true; fi
# the venv is relocatable only to the path it was built at; refuse a broken interpreter early
/opt/monky-deployd/venv/bin/python -c 'import monky_deployd' || { echo "monky-deployd: venv unusable (python3 mismatch?)" >&2; exit 1; }
if [ -d /run/systemd/system ]; then