prometheus: Monitor all the mirrors backing our GeoIP mirror

Monitoring just geo.mirror.pkgbuild.com would only monitor the mirror returned for that geographical area, with this commit we monitor all the potential returned mirrors.

Co-authored-by: Evangelos Foutras evangelos@foutrelis.com

Fix #443 (closed)

roles/prometheus/defaults/main.yml

@@ -14,6 +14,9 @@ prometheus_remote_write_relabel_configs:
 # for d in $(curl -sf "https://crt.sh/?q=archlinux.org&output=json" "https://crt.sh/?q=pkgbuild.com&output=json" | jq -r ".[].name_value" | sort -u); do if curl -o /dev/null -sS "https://$d"; then echo $d; fi; done | grep -v "\@" | sort | sed "s/^/  - https:\/\//"
 blackbox_targets:
   http_prometheus:
+    - targets: "{{ groups['geo_mirrors'] }}"
+      hostname: geo.mirror.pkgbuild.com
+      secure: true
     - http://{{ hostvars['monitoring.archlinux.org']['wireguard_address'] }}
     - https://accounts.archlinux.org
     - https://america.archive.pkgbuild.com