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alloy: add prometheus.exporter.unix canary (Track A fleet rollout)

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Embeds node_exporter inside Alloy alongside Loki shipping; pushes
metrics via remote_write to observe Prom with job=node_lxc_canary
to run side-by-side with the existing node_exporter scrape until
cutover. See homelab-docs/docs/audit/alloy-consolidation-2026-05-21.md.
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2026-05-21 19:21:22 -04:00
parent b33148e010
commit 40af073d9c
2 changed files with 52 additions and 0 deletions
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vars/main.yml
+6
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@@ -31,6 +31,12 @@ ssh_authorized_keys:
# this LXC — bare-metal systemd Alloy via Grafana apt repo.
alloy_host_label: meridian
alloy_loki_url: http://observe.lan.balders.ca:3100/loki/api/v1/push
# Track A canary: _canary suffix lets the embedded exporter run in
# parallel with the existing node_exporter scrape — once parity is
# verified, flip this to node_lxc and decommission node_exporter.
alloy_prom_job: node_lxc_canary
alloy_prom_group: lxc
alloy_prom_hostname: meridian
# Meridian
meridian_user: meridian