pez-infra/ansible/roles/alloy/templates/alloy.config.alloy.j2

// Ansible managed — generated from alloy.config.alloy.j2
// Grafana Alloy log shipping agent — {{ inventory_hostname }}

// ─── System logs ─────────────────────────────────────────────────────────────

{% if ansible_facts['os_family'] == 'Debian' %}
local.file_match "system" {
  path_targets = [
    {"__path__" = "/var/log/syslog",   "job" = "syslog", "host" = "{{ inventory_hostname }}"},
    {"__path__" = "/var/log/auth.log", "job" = "auth",   "host" = "{{ inventory_hostname }}"},
    {"__path__" = "/var/log/kern.log", "job" = "kern",   "host" = "{{ inventory_hostname }}"},
  ]
}
{% elif ansible_facts['os_family'] == 'Alpine' %}
local.file_match "system" {
  path_targets = [
    {"__path__" = "/var/log/messages", "job" = "messages", "host" = "{{ inventory_hostname }}"},
  ]
}
{% elif ansible_facts['os_family'] == 'FreeBSD' %}
local.file_match "system" {
  path_targets = [
    {"__path__" = "/var/log/messages",  "job" = "syslog", "host" = "{{ inventory_hostname }}"},
    {"__path__" = "/var/log/auth.log",  "job" = "auth",   "host" = "{{ inventory_hostname }}"},
  ]
}
{% endif %}

loki.source.file "system" {
  targets    = local.file_match.system.targets
  forward_to = [loki.write.default.receiver]
}

{% if 'docker_hosts' in group_names %}
// ─── Docker container logs ────────────────────────────────────────────────────

discovery.docker "containers" {
  host             = "unix:///var/run/docker.sock"
  refresh_interval = "15s"
}

discovery.relabel "docker_containers" {
  targets = discovery.docker.containers.targets

  rule {
    source_labels = ["__meta_docker_container_state"]
    action        = "keep"
    regex         = "running"
  }
  rule {
    source_labels = ["__meta_docker_container_name"]
    regex         = "/(.*)"
    target_label  = "container"
  }
  rule {
    source_labels = ["__meta_docker_container_label_com_docker_compose_service"]
    target_label  = "compose_service"
  }
  rule {
    source_labels = ["__meta_docker_container_label_com_docker_compose_project"]
    target_label  = "compose_project"
  }
}

loki.source.docker "containers" {
  host       = "unix:///var/run/docker.sock"
  targets    = discovery.relabel.docker_containers.output
  forward_to = [loki.write.default.receiver]
  labels     = {"host" = "{{ inventory_hostname }}"}
}
{% endif %}

{% if inventory_hostname == 'london-b' %}
// ─── london-b app logs ────────────────────────────────────────────────────────

local.file_match "apps" {
  path_targets = [
    {"__path__" = "/var/lib/plexmediaserver/Library/Application Support/Plex Media Server/Logs/*.log", "job" = "plex",     "host" = "london-b"},
    {"__path__" = "/var/log/jellyfin/*.log",                                                            "job" = "jellyfin", "host" = "london-b"},
  ]
}

loki.source.file "apps" {
  targets    = local.file_match.apps.targets
  forward_to = [loki.write.default.receiver]
}
{% endif %}

// ─── Loki output ──────────────────────────────────────────────────────────────

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