// Alloy — journald-only on this host (no Docker — Meridian + LiteLLM run
// as systemd services). Ships to Loki on observe.lan.balders.ca.

loki.source.journal "host" {
  path       = "/var/log/journal"
  max_age    = "1m"
  forward_to = [loki.process.journal.receiver]

  relabel_rules = loki.relabel.journal.rules
  labels = {
    job  = "journald",
    host = "{{ alloy_host_label }}",
  }
}

loki.relabel "journal" {
  forward_to = []

  rule {
    source_labels = ["__journal__systemd_unit"]
    target_label  = "unit"
  }
  rule {
    source_labels = ["__journal__hostname"]
    target_label  = "instance"
  }
  rule {
    source_labels = ["__journal_priority_keyword"]
    target_label  = "severity"
  }
}

loki.process "journal" {
  forward_to = [loki.write.default.receiver]
}

loki.write "default" {
  endpoint {
    url = "{{ alloy_loki_url }}"
  }
}

// ============================================================
// Prometheus — embedded node_exporter (replaces standalone).
// Bare-metal Alloy on systemd; reads /proc, /sys, / natively
// (no /host/* bind mounts; no pid:host needed).
// ============================================================

prometheus.exporter.unix "node" {
  // Defaults: rootfs_path=/, procfs_path=/proc, sysfs_path=/sys
}

prometheus.scrape "node" {
  targets         = prometheus.exporter.unix.node.targets
  forward_to      = [prometheus.relabel.node.receiver]
  scrape_interval = "15s"
  job_name        = "{{ alloy_prom_job | default('node_lxc') }}"
}

// Alloy's exporter sets job=integrations/unix and the targets carry no
// instance label by default. Rewrite to match the historical Prometheus
// scrape labels so existing dashboards keep working.
prometheus.relabel "node" {
  forward_to = [prometheus.remote_write.observe.receiver]
  rule {
    target_label = "instance"
    replacement  = "{{ alloy_prom_instance | default(ansible_default_ipv4.address + ':9100') }}"
  }
  rule {
    target_label = "job"
    replacement  = "{{ alloy_prom_job | default('node_lxc') }}"
  }
  rule {
    target_label = "group"
    replacement  = "{{ alloy_prom_group | default('lxc') }}"
  }
  rule {
    target_label = "hostname"
    replacement  = "{{ alloy_prom_hostname | default(alloy_host_label) }}"
  }
}

prometheus.remote_write "observe" {
  endpoint {
    url = "{{ alloy_prom_remote_write | default('http://observe.lan.balders.ca:9090/api/v1/write') }}"
  }
}