Alloy ships logs: root host-network service so it can read the journal #53

Merged
dank merged 3 commits from feat/alloy-root-journal into main 2026-10-20 20:05:00 -07:00
3 Commits
Author SHA1 Message Date
Frank e494617599 docs(alloy): document the root journal-read cutover
Alloy page rewritten to the shipped root design (why root, the two
mounts that make it work, deploy-pending status); Observability current
state marks the log pipeline fixed-in-code, awaiting deploy.
2026-10-20 19:50:15 -07:00
Frank 9809ed9c74 test(observability): pin the root alloy shape
The seams encoded alloy-as-rootless (default.target, dankclaw_default,
loki:3100 by name, 0.0.0.0+PublishPort UI, After=loki.service). Update
them to the root/system/host shape and add a test pinning the
load-bearing properties: Network=host, the /etc/machine-id mount, the
journal mounts, loopback UI, and the system-install + root-mirror
deploy path.
2026-10-20 19:50:15 -07:00
Frank 634fef242b feat(alloy): run it as a root host-network service so it reads the journal
A rootless Alloy shipped zero lines: the journal files are
root:systemd-journal 0640 (other::---) and a rootless container carries no
supplementary groups, so sd_journal_open sees an empty view silently; the
rootless quadlet container logs also live in user-1000.journal, not the
ctr.log paths the old config tailed.

As root, one loki.source.journal reads system.journal + user-*.journal
and carries both. Network=host because Loki publishes 127.0.0.1:3100 and
no bridge container can reach the host loopback; the UI binds loopback
directly (no PublishPort). The /etc/machine-id mount is load-bearing —
sd_journal finds the journal dir by the local machine id; without it the
source reads 0 lines, health green.

deploy_alloy routes around the rootless loop: build rootless, mirror the
image into the root store (a root build fails on DNS in the build
container), retire the old rootless alloy unit, install to
/etc/containers/systemd. Validated with a throwaway root probe: 31,825
lines read, 26,966 pushed to Loki in 20s, zero drops.
2026-10-20 19:50:15 -07:00