From 5457312e6232ffc8df0c4e47e9914ff7322049e4 Mon Sep 17 00:00:00 2001
From: Guillaume Abrioux <gabrioux@redhat.com>
Date: Mon, 20 May 2019 16:32:08 +0200
Subject: [PATCH] dashboard: add a last default value in grafana-server host
 section

If there is no mgrs and mons in the inventory, it will fail with the following error:

```
ERROR! The field 'hosts' has an invalid value, which includes an undefined variable. The error was: 'dict object' has no attribute 'mons'

The error appears to be in '/home/guits/ceph-ansible/site-docker.yml.sample': line 539, column 3, but may
be elsewhere in the file depending on the exact syntax problem.

The offending line appears to be:

- hosts: '{{ (groups["mgrs"] | default(groups["mons"]))[0] }}'
  ^ here
We could be wrong, but this one looks like it might be an issue with
missing quotes. Always quote template expression brackets when they
start a value. For instance:

    with_items:
      - {{ foo }}

Should be written as:

    with_items:
      - "{{ foo }}"
```

let's add an  `omit` so it just display this message instead:

```
PLAY [[]] *******************
skipping: no hosts matched
```

Signed-off-by: Guillaume Abrioux <gabrioux@redhat.com>
---
 site-container.yml.sample | 2 +-
 site.yml.sample           | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/site-container.yml.sample b/site-container.yml.sample
index 6063108f1..53f7cb806 100644
--- a/site-container.yml.sample
+++ b/site-container.yml.sample
@@ -558,7 +558,7 @@
           name: ceph-grafana
       when: dashboard_enabled
 
-- hosts: '{{ (groups["mgrs"] | default(groups["mons"]))[0] }}'
+- hosts: '{{ (groups["grafana-server"] | default(groups["mgrs"]) | default(groups["mons"]))[0] | default(omit) }}'
   become: true
   tasks:
     - block:
diff --git a/site.yml.sample b/site.yml.sample
index 8696959e0..d8726ecf5 100644
--- a/site.yml.sample
+++ b/site.yml.sample
@@ -487,7 +487,7 @@
             name: ceph-grafana
       when: dashboard_enabled
 
-- hosts: '{{ (groups["mgrs"] | default(groups["mons"]))[0] }}'
+- hosts: '{{ (groups["grafana-server"] | default(groups["mgrs"]) | default(groups["mons"]))[0] | default(omit) }}'
   become: true
   tasks:
     - import_role: