From bca864f33f363f4c56ee4a1910a98a4efff4e437 Mon Sep 17 00:00:00 2001
From: Liam Young <liam.young@canonical.com>
Date: Fri, 1 Mar 2019 11:13:05 +0000
Subject: [PATCH] Support hacluster using peer-availability relation

Add support for the hacluster charm to be related to a principle
using the juju-info interface using the peer-availability relation.
This is useful in the situation where a cluster without any resources
is needed.

Change-Id: Ibd03ba7923cfd2c412d5f772cf385a21c423e5af
---
 hooks/hooks.py                           | 4 +++-
 hooks/peer-availability-relation-changed | 1 +
 hooks/peer-availability-relation-joined  | 1 +
 metadata.yaml                            | 3 +++
 4 files changed, 8 insertions(+), 1 deletion(-)
 create mode 120000 hooks/peer-availability-relation-changed
 create mode 120000 hooks/peer-availability-relation-joined

diff --git a/hooks/hooks.py b/hooks/hooks.py
index 2d73a59..ed7d50c 100755
--- a/hooks/hooks.py
+++ b/hooks/hooks.py
@@ -229,6 +229,8 @@ def hanode_relation_joined(relid=None):
 
 @hooks.hook('ha-relation-joined',
             'ha-relation-changed',
+            'peer-availability-relation-joined',
+            'peer-availability-relation-changed',
             'hanode-relation-changed')
 def ha_relation_changed():
     # Check that we are related to a principle and that
@@ -253,7 +255,7 @@ def ha_relation_changed():
             level=INFO)
         return
 
-    relids = relation_ids('ha')
+    relids = relation_ids('ha') or relation_ids('juju-info')
     if len(relids) == 1:  # Should only ever be one of these
         # Obtain relation information
         relid = relids[0]
diff --git a/hooks/peer-availability-relation-changed b/hooks/peer-availability-relation-changed
new file mode 120000
index 0000000..9416ca6
--- /dev/null
+++ b/hooks/peer-availability-relation-changed
@@ -0,0 +1 @@
+hooks.py
\ No newline at end of file
diff --git a/hooks/peer-availability-relation-joined b/hooks/peer-availability-relation-joined
new file mode 120000
index 0000000..9416ca6
--- /dev/null
+++ b/hooks/peer-availability-relation-joined
@@ -0,0 +1 @@
+hooks.py
\ No newline at end of file
diff --git a/metadata.yaml b/metadata.yaml
index d3d56f3..6c256f5 100644
--- a/metadata.yaml
+++ b/metadata.yaml
@@ -15,6 +15,9 @@ requires:
   juju-info:
     interface: juju-info
     scope: container
+  peer-availability:
+    interface: juju-info
+    scope: container
 provides:
   ha:
     interface: hacluster