Add fsid and mon_hosts. Also add a simple README

.gitignore

@@ -0,0 +1,2 @@
+.idea
+*.swp

README.md

@@ -0,0 +1,39 @@
+# Overview
+
+This interface layer handles the communication between the Ceph Monitor Syslog
+and an client that requires an admin key.
+
+# Usage
+
+## Requires
+
+Charms requiring this interface gather logs and forward them to a provider.
+This interface layer will set the following states, as appropriate:
+
+  * `{relation_name}.available` The ceph client has been related to a provider.
+  The following accessors will be available:
+   - key - The admin cephx key
+   - auth - Whether or not strict auth is supported
+   - mon_hosts - The public addresses list of the monitor cluster
+
+
+Client example:
+
+```python
+@when('ceph-admin.available')
+def ceph_connected(ceph_info):
+  charm_ceph_conf = os.path.join(os.sep, 'etc', 'ceph', 'ceph.conf')
+  cephx_key = os.path.join(os.sep, 'etc', 'ceph', 'ceph.client.admin.keyring')
+
+  ceph_context = {
+      'auth_supported': ceph_client.auth,
+      'mon_hosts': ceph_client.mon_hosts,
+  }
+
+  with open(charm_ceph_conf, 'w') as cephconf:
+    cephconf.write(render_template('ceph.conf', ceph_context))
+
+  # Write out the cephx_key also
+  with open(cephx_key, 'w') as cephconf:
+    cephconf.write(ceph_client.key)
+```

requires.py

@@ -6,34 +6,41 @@ from charms.reactive import is_state
 
 class CephClient(RelationBase):
     scope = scopes.GLOBAL
-    auto_accessors = ['key', 'auth', 'public_address']
+    auto_accessors = ['key', 'fsid', 'auth', 'mon_hosts']
 
     @hook('{requires:ceph-admin}-relation-{joined,changed}')
     def changed(self):
         self.set_state('{relation_name}.connected')
         key = None
+        fsid = None
         auth = None
-        public_addr = None
+        mon_hosts = None
 
         try:
             key = self.key
         except AttributeError:
             pass
 
+        try:
+            fsid = self.fsid
+        except AttributeError:
+            pass
+
         try:
             auth = self.auth
         except AttributeError:
             pass
 
         try:
-            public_addr = self.public_address
+            mon_hosts = self.mon_hosts
         except AttributeError:
             pass
 
         data = {
             'key': key,
+            'fsid': fsid,
             'auth': auth,
-            'public_address': public_addr
+            'mon_hosts': mon_hosts
         }
 
         if all(data.values()):