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40af073d9c
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.
88 lines
2.4 KiB
Django/Jinja
88 lines
2.4 KiB
Django/Jinja
// Alloy — journald-only on this host (no Docker — Meridian + LiteLLM run
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// as systemd services). Ships to Loki on observe.lan.balders.ca.
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loki.source.journal "host" {
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path = "/var/log/journal"
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max_age = "1m"
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forward_to = [loki.process.journal.receiver]
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relabel_rules = loki.relabel.journal.rules
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labels = {
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job = "journald",
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host = "{{ alloy_host_label }}",
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}
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}
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loki.relabel "journal" {
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forward_to = []
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rule {
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source_labels = ["__journal__systemd_unit"]
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target_label = "unit"
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}
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rule {
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source_labels = ["__journal__hostname"]
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target_label = "instance"
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}
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rule {
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source_labels = ["__journal_priority_keyword"]
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target_label = "severity"
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}
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}
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loki.process "journal" {
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forward_to = [loki.write.default.receiver]
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}
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loki.write "default" {
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endpoint {
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url = "{{ alloy_loki_url }}"
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}
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}
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// ============================================================
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// Prometheus — embedded node_exporter (replaces standalone).
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// Bare-metal Alloy on systemd; reads /proc, /sys, / natively
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// (no /host/* bind mounts; no pid:host needed).
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// ============================================================
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prometheus.exporter.unix "node" {
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// Defaults: rootfs_path=/, procfs_path=/proc, sysfs_path=/sys
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}
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prometheus.scrape "node" {
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targets = prometheus.exporter.unix.node.targets
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forward_to = [prometheus.relabel.node.receiver]
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scrape_interval = "15s"
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job_name = "{{ alloy_prom_job | default('node_lxc') }}"
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}
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// Alloy's exporter sets job=integrations/unix and the targets carry no
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// instance label by default. Rewrite to match the historical Prometheus
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// scrape labels so existing dashboards keep working.
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prometheus.relabel "node" {
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forward_to = [prometheus.remote_write.observe.receiver]
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rule {
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target_label = "instance"
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replacement = "{{ alloy_prom_instance | default(ansible_default_ipv4.address + ':9100') }}"
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}
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rule {
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target_label = "job"
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replacement = "{{ alloy_prom_job | default('node_lxc') }}"
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}
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rule {
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target_label = "group"
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replacement = "{{ alloy_prom_group | default('lxc') }}"
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}
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rule {
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target_label = "hostname"
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replacement = "{{ alloy_prom_hostname | default(alloy_host_label) }}"
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}
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}
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prometheus.remote_write "observe" {
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endpoint {
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url = "{{ alloy_prom_remote_write | default('http://observe.lan.balders.ca:9090/api/v1/write') }}"
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}
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}
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