Merge branch 'prometheus-reload' into 'master'

Reload Prometheus components config via HTTP

Closes #84

See merge request !154

roles/prometheus-lts/handlers/main.yml

 ---
 
-- name: restart prometheus-lts
-  systemd:
-    name: docker-prometheus-lts-prometheus.service
-    state: restarted
+- name: reload prometheus-lts
+  uri:
+    url: "http://localhost:9099/-/reload"
+    method: POST
   listen: "reload prometheus-lts"

roles/prometheus/handlers/main.yml

 ---
 
-- name: restart prometheus
-  systemd:
-    name: docker-prometheus-prometheus.service
-    state: restarted
+- name: reload prometheus
+  uri:
+    url: "http://localhost:9090/-/reload"
+    method: POST
   listen: "reload prometheus"
 
-- name: restart prometheus-alertmanager
-  systemd:
-    name: docker-prometheus-alertmanager.service
-    state: restarted
+- name: reload alertmanager
+  uri:
+    url: "http://localhost:9093/-/reload"
+    method: POST
   listen: "reload prometheus"
 
-- name: restart prometheus-blackbox
-  systemd:
-    name: docker-prometheus-blackbox.service
-    state: restarted
+- name: reload blackbox
+  uri:
+    url: "http://localhost:9115/-/reload"
+    method: POST
   listen: "reload prometheus"
 
 - name: restart grafana-server

services.prometheus-lts.yml

@@ -14,7 +14,7 @@ prometheus-lts:
       volumes:
         - /etc/prometheus-lts: /etc/prometheus-lts
         - /var/lib/prometheus-lts/metrics2: /var/lib/prometheus-lts/metrics2
-      args: "--config.file=/etc/prometheus-lts/prometheus.yml --web.listen-address=0.0.0.0:9099 --storage.tsdb.path=/var/lib/prometheus-lts/metrics2 --storage.tsdb.retention.time={{ prometheus_lts_tsdb_retention | default('395d') }} --web.external-url=https://monitor-lts.{{ domain_public[0] }}"
+      args: "--config.file=/etc/prometheus-lts/prometheus.yml --web.listen-address=0.0.0.0:9099 --storage.tsdb.path=/var/lib/prometheus-lts/metrics2 --storage.tsdb.retention.time={{ prometheus_lts_tsdb_retention | default('395d') }} --web.external-url=https://monitor-lts.{{ domain_public[0] }} --web.enable-lifecycle"
     - name: thanos
       image: registry.git.autistici.org/ai3/docker/thanos:master
       ports:

services.yml.default

@@ -112,7 +112,7 @@ prometheus:
       volumes:
         - /etc/prometheus: /etc/prometheus
         - /var/lib/prometheus/metrics2: /var/lib/prometheus/metrics2
-      args: "--storage.tsdb.retention.time={{ prometheus_tsdb_retention | default('90d') }} --web.external-url=https://monitor.{{ domain_public[0] }}"
+      args: "--storage.tsdb.retention.time={{ prometheus_tsdb_retention | default('90d') }} --web.external-url=https://monitor.{{ domain_public[0] }} --web.enable-lifecycle"
     - name: alertmanager
       image: registry.git.autistici.org/ai3/docker/prometheus-alertmanager:master
       ports:

services.yml.no-elasticsearch

@@ -59,7 +59,7 @@ prometheus:
       volumes:
         - /etc/prometheus: /etc/prometheus
         - /var/lib/prometheus/metrics2: /var/lib/prometheus/metrics2
-      args: "--storage.tsdb.retention.time={{ prometheus_tsdb_retention | default('90d') }} --web.external-url=https://monitor.{{ domain_public[0] }}"
+      args: "--storage.tsdb.retention.time={{ prometheus_tsdb_retention | default('90d') }} --web.external-url=https://monitor.{{ domain_public[0] }} --web.enable-lifecycle"
     - name: alertmanager
       image: registry.git.autistici.org/ai3/docker/prometheus-alertmanager:master
       ports: