vm-hosts: Scrape libvirt logs with Promtail

Collecting logs from VM serial consoles and QEMU monitor.

group_vars/vm-hosts.yml

@@ -264,3 +264,29 @@ vm_autostart:
 - delay 10s
 - pxe0
 - unifi3
+
+promtail_dac_read_search: true
+promtail_scrape_configs:
+- '{{ promtail_default_scrape.journal }}'
+- job_name: vm-console
+  static_configs:
+  - labels:
+      __path__: /var/log/libvirt/console/*.log
+      job: vm-console
+  pipeline_stages:
+  - regex:
+      source: __path__
+      expression: '/var/log/libvirt/console/(?P<domain>.*)\.log$'
+  - labels:
+      domain:
+- job_name: qemu
+  static_configs:
+  - labels:
+      __path__: /var/log/libvirt/qemu/*.log
+      job: qemu
+  pipeline_stages:
+  - regex:
+      source: __path__
+      expression: '.*/(?P<domain>.*)\.log$'
+  - labels:
+      domain: