add lvm management

defaults/main.yml

@@ -5,6 +5,18 @@ postgres_repository_filename: "Postgresql-{{ postgres_version | regex_replace('\
 postgres_user: postgres
 postgres_group: postgres
 
+# Create separate LVM storage for matrix
+postgres_lvm_enabled: False
+# This variables are only necessary if postgres_lvm_enabled is 'True'
+# Set physical volumes to use in LVM
+# postgres_lvm_pvs: # ['/dev/sdb', '/dev/sdc']
+# postgres_lvm_vg:  # "vg_matrix"
+# postgres_lvm_lv: # "lv_matrix"
+# postgres_lvm_fstype: # "ext4"
+# postgres_lvm_size: # "50G"
+
+# postgres_base_dir: # defaults to os default
+
 # Available postgresql.conf options
 postgres_log_destination:
   - stderr

tasks/main.yml

@@ -1,5 +1,7 @@
 ---
 - import_tasks: prepare.yml
+- import_tasks: storage.yml
+  when: postgres_lvm_enabled | bool
 - import_tasks: install.yml
 - import_tasks: config.yml
 - import_tasks: tls.yml

tasks/storage.yml

@@ -0,0 +1,27 @@
+---
+- block:
+    - name: Create volume group '{{ postgres_lvm_vg }}'
+      lvg:
+        vg: "{{ postgres_lvm_vg }}"
+        pvs: "{{ postgres_lvm_pvs | join(',') }}"
+
+    - name: Create logical volume '{{ postgres_lvm_lv }}'
+      lvol:
+        vg: "{{ postgres_lvm_vg }}"
+        lv: "{{ postgres_lvm_lv }}"
+        size: "{{ postgres_lvm_size }}"
+
+    - name: Create filesystem for '/dev/mapper/{{ postgres_lvm_vg }}-{{ postgres_lvm_lv }}'
+      filesystem:
+        fstype: "{{ postgres_lvm_fstype }}"
+        dev: "/dev/mapper/{{ postgres_lvm_vg }}-{{ postgres_lvm_lv }}"
+        resizefs: True
+
+    - name: Mount volume to '{{ postgres_base_dir }}'
+      mount:
+        path: "{{ postgres_base_dir }}"
+        src: "/dev/mapper/{{ postgres_lvm_vg }}-{{ postgres_lvm_lv }}"
+        fstype: "{{ postgres_lvm_fstype }}"
+        state: mounted
+  become: True
+  become_user: root