lvol: Fix pct of origin (#7053)

* add support for percentage of origin size for creating snapshot volumes

* add changelog fragment

* add pull request link

Co-authored-by: Felix Fontein <felix@fontein.de>

* fix what's not idempotent

---------

Co-authored-by: Felix Fontein <felix@fontein.de>

tests/integration/targets/lvg/tasks/setup.yml

@@ -4,7 +4,7 @@
 # SPDX-License-Identifier: GPL-3.0-or-later
 
 - name: "Create files to use as a disk devices"
-  command: "dd if=/dev/zero of={{ remote_tmp_dir }}/img{{ item }} bs=1M count=10"
+  command: "dd if=/dev/zero of={{ remote_tmp_dir }}/img{{ item }} bs=1M count=36"
   with_sequence: 'count=4'
 
 - name: "Show next free loop device"

tests/integration/targets/lvg/tasks/test_active_change.yml

@@ -17,6 +17,16 @@
     lv: "{{ item }}"
     size: 2m
 
+- name: Create snapshot volumes of origin logical volumes
+  loop:
+    - lv1
+    - lv2
+  lvol:
+    vg: testvg
+    lv: "{{ item }}"
+    snapshot: "{{ item }}_snap"
+    size: 50%ORIGIN
+
 - name: Collect all lv active status in testvg
   shell: vgs -olv_active --noheadings testvg | xargs -n1
   register: initial_lv_status_result

tests/integration/targets/lvg/tasks/test_pvresize.yml

@@ -12,10 +12,10 @@
   shell: vgs -v testvg -o pv_size --noheading --units b | xargs
   register: cmd_result
 
-- name: Assert the testvg size is 8388608B
+- name: Assert the testvg size is 33554432B
   assert:
    that:
-    - "'8388608B' == cmd_result.stdout"
+    - "'33554432B' == cmd_result.stdout"
 
 - name: Increases size in file
   command: "dd if=/dev/zero bs=8MiB count=1 of={{ remote_tmp_dir }}/img1 conv=notrunc oflag=append"
@@ -38,10 +38,10 @@
   shell: vgs -v testvg -o pv_size --noheading --units b | xargs
   register: cmd_result
 
-- name: Assert the testvg size is still 8388608B
+- name: Assert the testvg size is still 33554432B
   assert:
    that:
-    - "'8388608B' == cmd_result.stdout"
+    - "'33554432B' == cmd_result.stdout"
 
 - name: "Reruns lvg with pvresize:yes and check_mode:yes"
   lvg:
@@ -60,10 +60,10 @@
   shell: vgs -v testvg -o pv_size --noheading --units b | xargs
   register: cmd_result
  
-- name: Assert the testvg size is still 8388608B
+- name: Assert the testvg size is still 33554432B
   assert:
    that:
-    - "'8388608B' == cmd_result.stdout"
+    - "'33554432B' == cmd_result.stdout"
 
 - name: "Reruns lvg with pvresize:yes"
   lvg:
@@ -75,7 +75,7 @@
   shell: vgs -v testvg -o pv_size --noheading --units b | xargs
   register: cmd_result
 
-- name: Assert the testvg size is now 16777216B
+- name: Assert the testvg size is now 41943040B
   assert:
    that:
-    - "'16777216B' == cmd_result.stdout"
+    - "'41943040B' == cmd_result.stdout"