diff --git a/installers/charm/interfaces/osm-nbi/README.md b/installers/charm/interfaces/osm-nbi/README.md
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+<!--
+Copyright 2020 Canonical Ltd.
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+    http://www.apache.org/licenses/LICENSE-2.0
+    Unless required by applicable law or agreed to in writing, software
+    distributed under the License is distributed on an "AS IS" BASIS,
+    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+    See the License for the specific language governing permissions and
+    limitations under the License. -->
+
+# Overview
+
+This interface layer handles communication between Mongodb and its clients.
+
+## Usage
+
+### Provides
+
+To implement this relation to offer an nbi:
+
+In your charm's metadata.yaml:
+
+```yaml
+provides:
+    nbi:
+        interface: osm-nbi
+```
+
+reactive/mynbi.py:
+
+```python
+@when('nbi.joined')
+def send_config(nbi):
+    nbi.send_connection(
+        unit_get('private-address'),
+        get_nbi_port()
+    )
+```
+
+### Requires
+
+If you would like to use an nbi from your charm:
+
+metadata.yaml:
+
+```yaml
+requires:
+    nbi:
+        interface: osm-nbi
+```
+
+reactive/mycharm.py:
+
+```python
+@when('nbi.ready')
+def nbi_ready():
+    nbi = endpoint_from_flag('nbi.ready')
+    if nbi:
+        for unit in nbi.nbis():
+            add_nbi(unit['host'], unit['port'])
+```
diff --git a/installers/charm/interfaces/osm-nbi/copyright b/installers/charm/interfaces/osm-nbi/copyright
new file mode 100644
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+++ b/installers/charm/interfaces/osm-nbi/copyright
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+Format: http://dep.debian.net/deps/dep5/
+
+Files: *
+Copyright: Copyright 2020, Canonical Ltd., All Rights Reserved.
+License: Apache License 2.0
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
+ .
+     http://www.apache.org/licenses/LICENSE-2.0
+ .
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
\ No newline at end of file
diff --git a/installers/charm/interfaces/osm-nbi/interface.yaml b/installers/charm/interfaces/osm-nbi/interface.yaml
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--- /dev/null
+++ b/installers/charm/interfaces/osm-nbi/interface.yaml
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+# Copyright 2020 Canonical Ltd.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+#     Unless required by applicable law or agreed to in writing, software
+#     distributed under the License is distributed on an "AS IS" BASIS,
+#     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+#     See the License for the specific language governing permissions and
+#     limitations under the License.
+name: osm-nbi
+summary: Interface for relating to a OSM Northbound Interface
+maintainer: '"Adam Israel" <adam@adamisrael.com>'
diff --git a/installers/charm/interfaces/osm-nbi/provides.py b/installers/charm/interfaces/osm-nbi/provides.py
new file mode 100644
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+++ b/installers/charm/interfaces/osm-nbi/provides.py
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+#!/usr/bin/python
+# Copyright 2020 Canonical Ltd.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+#     Unless required by applicable law or agreed to in writing, software
+#     distributed under the License is distributed on an "AS IS" BASIS,
+#     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+#     See the License for the specific language governing permissions and
+#     limitations under the License.
+
+from charms.reactive import RelationBase
+from charms.reactive import hook
+from charms.reactive import scopes
+
+
+class OsmNBIProvides(RelationBase):
+    scope = scopes.GLOBAL
+
+    @hook("{provides:osm-nbi}-relation-joined")
+    def joined(self):
+        self.set_state("{relation_name}.joined")
+
+    @hook("{provides:osm-nbi}-relation-changed")
+    def changed(self):
+        self.set_state("{relation_name}.ready")
+
+    @hook("{provides:osm-nbi}-relation-{broken,departed}")
+    def broken_departed(self):
+        self.remove_state("{relation_name}.ready")
+        self.remove_state("{relation_name}.joined")
+
+    @hook("{provides:osm-nbi}-relation-broken")
+    def broken(self):
+        self.set_state("{relation_name}.removed")
+
+    def send_connection(self, host, port=9999):
+        conv = self.conversation()
+        conv.set_remote("host", host)
+        conv.set_remote("port", port)
diff --git a/installers/charm/interfaces/osm-nbi/requires.py b/installers/charm/interfaces/osm-nbi/requires.py
new file mode 100644
index 0000000..a5e8e29
--- /dev/null
+++ b/installers/charm/interfaces/osm-nbi/requires.py
@@ -0,0 +1,56 @@
+# Copyright 2020 Canonical Ltd.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+#     Unless required by applicable law or agreed to in writing, software
+#     distributed under the License is distributed on an "AS IS" BASIS,
+#     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+#     See the License for the specific language governing permissions and
+#     limitations under the License.
+
+from charms.reactive import RelationBase
+from charms.reactive import hook
+from charms.reactive import scopes
+
+
+class OsmNBIRequires(RelationBase):
+    scope = scopes.GLOBAL
+
+    @hook("{requires:osm-nbi}-relation-joined")
+    def joined(self):
+        conv = self.conversation()
+        conv.set_state("{relation_name}.joined")
+
+    @hook("{requires:osm-nbi}-relation-changed")
+    def changed(self):
+        conv = self.conversation()
+        if self.nbis():
+            conv.set_state("{relation_name}.ready")
+        else:
+            conv.remove_state("{relation_name}.ready")
+
+    @hook("{requires:osm-nbi}-relation-departed")
+    def departed(self):
+        conv = self.conversation()
+        conv.remove_state("{relation_name}.ready")
+        conv.remove_state("{relation_name}.joined")
+
+    def nbis(self):
+        """Return the NBI's host and port.
+
+        [{
+            'host': <host>,
+            'port': <port>,
+        }]
+        """
+        nbis = []
+        for conv in self.conversations():
+            port = conv.get_remote("port")
+            host = conv.get_remote("host") or conv.get_remote("private-address")
+            if host and port:
+                nbis.append({"host": host, "port": port})
+        return nbis
diff --git a/installers/charm/interfaces/osm-ro/README.md b/installers/charm/interfaces/osm-ro/README.md
new file mode 100644
index 0000000..eb6413a
--- /dev/null
+++ b/installers/charm/interfaces/osm-ro/README.md
@@ -0,0 +1,63 @@
+<!--
+Copyright 2020 Canonical Ltd.
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+    http://www.apache.org/licenses/LICENSE-2.0
+    Unless required by applicable law or agreed to in writing, software
+    distributed under the License is distributed on an "AS IS" BASIS,
+    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+    See the License for the specific language governing permissions and
+    limitations under the License. -->
+
+# Overview
+
+This interface layer handles communication between OSM's RO and its clients.
+
+## Usage
+
+### Provides
+
+To implement this relation to offer an ro:
+
+In your charm's metadata.yaml:
+
+```yaml
+provides:
+    ro:
+        interface: osm-ro
+```
+
+reactive/myro.py:
+
+```python
+@when('ro.joined')
+def send_config(ro):
+    ro.send_connection(
+        unit_get('private-address'),
+        get_ro_port()
+    )
+```
+
+### Requires
+
+If you would like to use a rodb from your charm:
+
+metadata.yaml:
+
+```yaml
+requires:
+    ro:
+        interface: osm-ro
+```
+
+reactive/mycharm.py:
+
+```python
+@when('ro.ready')
+def ro_ready():
+    ro = endpoint_from_flag('ro.ready')
+    if ro:
+        for unit in ro.ros():
+            add_ro(unit['host'], unit['port'])
+```
diff --git a/installers/charm/interfaces/osm-ro/copyright b/installers/charm/interfaces/osm-ro/copyright
new file mode 100644
index 0000000..9270d6c
--- /dev/null
+++ b/installers/charm/interfaces/osm-ro/copyright
@@ -0,0 +1,16 @@
+Format: http://dep.debian.net/deps/dep5/
+
+Files: *
+Copyright: Copyright 2020, Canonical Ltd., All Rights Reserved.
+License: Apache License 2.0
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
+ .
+     http://www.apache.org/licenses/LICENSE-2.0
+ .
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
diff --git a/installers/charm/interfaces/osm-ro/interface.yaml b/installers/charm/interfaces/osm-ro/interface.yaml
new file mode 100644
index 0000000..9a12872
--- /dev/null
+++ b/installers/charm/interfaces/osm-ro/interface.yaml
@@ -0,0 +1,16 @@
+# Copyright 2020 Canonical Ltd.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+#     Unless required by applicable law or agreed to in writing, software
+#     distributed under the License is distributed on an "AS IS" BASIS,
+#     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+#     See the License for the specific language governing permissions and
+#     limitations under the License.
+name: osm-ro
+summary: Interface for relating to a OSM Resource Orchestrator
+maintainer: '"Adam Israel" <adam@adamisrael.com>'
diff --git a/installers/charm/interfaces/osm-ro/provides.py b/installers/charm/interfaces/osm-ro/provides.py
new file mode 100644
index 0000000..f577319
--- /dev/null
+++ b/installers/charm/interfaces/osm-ro/provides.py
@@ -0,0 +1,44 @@
+#!/usr/bin/python
+# Copyright 2020 Canonical Ltd.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+#     Unless required by applicable law or agreed to in writing, software
+#     distributed under the License is distributed on an "AS IS" BASIS,
+#     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+#     See the License for the specific language governing permissions and
+#     limitations under the License.
+
+from charms.reactive import RelationBase
+from charms.reactive import hook
+from charms.reactive import scopes
+
+
+class OsmROProvides(RelationBase):
+    scope = scopes.GLOBAL
+
+    @hook("{provides:osm-ro}-relation-joined")
+    def joined(self):
+        self.set_state("{relation_name}.joined")
+
+    @hook("{provides:osm-ro}-relation-changed")
+    def changed(self):
+        self.set_state("{relation_name}.ready")
+
+    @hook("{provides:osm-ro}-relation-{broken,departed}")
+    def broken_departed(self):
+        self.remove_state("{relation_name}.ready")
+        self.remove_state("{relation_name}.joined")
+
+    @hook("{provides:osm-ro}-relation-broken")
+    def broken(self):
+        self.set_state("{relation_name}.removed")
+
+    def send_connection(self, host, port=9090):
+        conv = self.conversation()
+        conv.set_remote("host", host)
+        conv.set_remote("port", port)
diff --git a/installers/charm/interfaces/osm-ro/requires.py b/installers/charm/interfaces/osm-ro/requires.py
new file mode 100644
index 0000000..fc8f0f4
--- /dev/null
+++ b/installers/charm/interfaces/osm-ro/requires.py
@@ -0,0 +1,56 @@
+# Copyright 2020 Canonical Ltd.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+#     Unless required by applicable law or agreed to in writing, software
+#     distributed under the License is distributed on an "AS IS" BASIS,
+#     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+#     See the License for the specific language governing permissions and
+#     limitations under the License.
+
+from charms.reactive import RelationBase
+from charms.reactive import hook
+from charms.reactive import scopes
+
+
+class OsmRORequires(RelationBase):
+    scope = scopes.GLOBAL
+
+    @hook("{requires:osm-ro}-relation-joined")
+    def joined(self):
+        conv = self.conversation()
+        conv.set_state("{relation_name}.joined")
+
+    @hook("{requires:osm-ro}-relation-changed")
+    def changed(self):
+        conv = self.conversation()
+        if self.ros():
+            conv.set_state("{relation_name}.ready")
+        else:
+            conv.remove_state("{relation_name}.ready")
+
+    @hook("{requires:osm-ro}-relation-departed")
+    def departed(self):
+        conv = self.conversation()
+        conv.remove_state("{relation_name}.ready")
+        conv.remove_state("{relation_name}.joined")
+
+    def ros(self):
+        """Return the NBI's host and port.
+
+        [{
+            'host': <host>,
+            'port': <port>,
+        }]
+        """
+        ros = []
+        for conv in self.conversations():
+            port = conv.get_remote("port")
+            host = conv.get_remote("host") or conv.get_remote("private-address")
+            if host and port:
+                ros.append({"host": host, "port": port})
+        return ros