ceph-osd: Fix start_osds.yml in check mode

This construct doesn't work as intended since ansible/ansible#74212:

```
ceph_osd_ids.stdout | default('{}') | from_json
```

That PR made the `command` module return `stdout` even in check mode (setting
it to the empty string), so `default()` has no effect in that case and
`from_json()` fails to parse an empty string.

Instead, `default()` needs to be invoked with its second argument set to
`True`, so that it replaces any `False` value (such as an empty string) with
its first argument:

```
ceph_osd_ids.stdout | default('{}', True) | from_json
```

Signed-off-by: Benoît Knecht <bknecht@protonmail.ch>
(cherry picked from commit 0b3a608216708e8005ed4fc34122f0fc61d0d459)

diff --git a/roles/ceph-osd/tasks/start_osds.yml b/roles/ceph-osd/tasks/start_osds.yml
index 30417976ced2e146fc3dd2a431800510b04e5817..20a127984045f6bd09dab7972fc2a552bb331ac1 100644 (file)
--- a/roles/ceph-osd/tasks/start_osds.yml
+++ b/roles/ceph-osd/tasks/start_osds.yml
@@ -46,7 +46,7 @@
     mode: "{{ ceph_directories_mode }}"
     owner: "{{ ceph_uid if containerized_deployment | bool else 'ceph' }}"
     group: "{{ ceph_uid if containerized_deployment | bool else 'ceph' }}"
-  with_items: "{{ ((ceph_osd_ids.stdout | default('{}') | from_json).keys() | list) | union(osd_ids_non_container.stdout_lines | default([])) }}"
+  with_items: "{{ ((ceph_osd_ids.stdout | default('{}', True) | from_json).keys() | list) | union(osd_ids_non_container.stdout_lines | default([])) }}"
 
 - name: systemd start osd
   systemd:
@@ -55,4 +55,4 @@
     enabled: yes
     masked: no
     daemon_reload: yes
-  with_items: "{{ ((ceph_osd_ids.stdout | default('{}') | from_json).keys() | list) | union(osd_ids_non_container.stdout_lines | default([])) }}"
+  with_items: "{{ ((ceph_osd_ids.stdout | default('{}', True) | from_json).keys() | list) | union(osd_ids_non_container.stdout_lines | default([])) }}"