Set action output for get_health

Change-Id: I23287bd153f1e61a94593734b1de43ef6abad36a
Closes-Bug: 1808189

actions/ceph_ops.py

@@ -66,7 +66,7 @@ def get_health():
     On error, 'unknown' is returned.
     """
     try:
-        value = check_output(['ceph', 'health'])
+        value = check_output(['ceph', 'health']).decode('utf-8')
         return value
     except CalledProcessError as e:
         action_fail(e.message)

actions/get-health

@@ -1,6 +1,12 @@
 #!/usr/bin/python
 
 from ceph_ops import get_health
+from charmhelpers.core.hookenv import log, action_set, action_fail
 
 if __name__ == '__main__':
-    get_health()
+    try:
+        action_set({'message': get_health()})
+    except CalledProcessError as e:
+        log(e)
+        action_fail(
+            "ceph health failed with message: {}".format(str(e)))