DEV-546: prometheus data via LVM

group_vars/stage_prodnso/prometheus.yml

@@ -0,0 +1,5 @@
+---
+prometheus_lvm_hcloudvol_size: 30
+prometheus_lvm_hcloudvol_count: 2
+
+prometheus_tsdb_rentention_time: '90d'

roles/prometheus/defaults/main.yml

@@ -1,4 +1,9 @@
 ---
+prometheus_lvm_hcloudvol_size: 30
+prometheus_lvm_hcloudvol_count: 1
+prometheus_lvm_hcloudvol_mountpath: '/prometheus_datadir'
+
+prometheus_datadir: "{{ prometheus_lvm_hcloudvol_mountpath }}"
 
 # https://github.com/prometheus/prometheus
 prometheus_image_name: "prom/prometheus"

roles/prometheus/tasks/main.yml

@@ -4,6 +4,15 @@
 ###   update_config
 ###   update_deployment
 
+- name: "Create/Resize LVM for datadir"
+  include_role:
+    name: lvm_with_hetzner_volumes
+  vars:
+    lvm_with_hetzner_volumes__volprefix: prometheus_datadir
+    lvm_with_hetzner_volumes__volsize: "{{ prometheus_lvm_hcloudvol_size }}"
+    lvm_with_hetzner_volumes__volcount: "{{ prometheus_lvm_hcloudvol_count }}"
+    lvm_with_hetzner_volumes__mountpath: "{{ prometheus_lvm_hcloudvol_mountpath }}"
+
 - name: "Setup DNS configuration for <{{ inventory_hostname }}>"
   include_role:
     name: sma_digitalocean

roles/prometheus/vars/main.yml

@@ -21,9 +21,6 @@ prometheus_docker: {
     },
   ],
   volumes: [
-    {
-      name: "{{ prometheus_id }}-data"
-    },
     {
       name: "{{ alertmanager_id }}-data"
     },
@@ -56,7 +53,7 @@ prometheus_docker: {
       ],
       volumes: [
         '"./config/prometheus/:/etc/prometheus/:ro"',
-        '"{{ prometheus_id }}-data:/prometheus"',
+        '"{{ prometheus_datadir + "/" +"_data" | default(prometheus_id + "-data") }}:/prometheus"',
       ],
       networks: [
         '"back-tier"',