Frank
065a6911f9
fix(blackbox): Exec carries flags only (image has ENTRYPOINT) and the exporter binds loopback+LAN
...
Three stacked lessons, each proved live 2026-10-21:
- the image's ENTRYPOINT is /bin/blackbox_exporter, so Exec= repeating the
binary made it a positional arg: 'unexpected /bin/blackbox_exporter'.
- the podman gateway 169.254.1.2 is NOT bindable from the host netns - it
exists only inside each rootless netns: 'bind: cannot assign requested
address'. The scrape path does not need it bound: a bridge container
dialing the gateway lands on the host LOOPBACK (proved 200 from the
prometheus container), so the exporter binds 127.0.0.1 + LAN.
- HealthCmd shell form ('/bin/sh -c "..."') is passed as one quoted token
and quadlet folds the following --health-interval/--health-retries (and
the image) into the command string; the plain exec form the sibling units
use is correct.
Prometheus.md bind law corrected (gateway is a forward-to-loopback, not a
bind address); deploy-remote gate stays loopback, which is now honest.
2026-10-21 16:04:53 -07:00
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