[Kimchi-devel] [PATCH 4/6] Discover Kimchi peers using openSLP

[Aline Manera]

When federation feature is enabled, Kimchi server will be registered
on openSLP service on server starting up. It will expose the Kimchi URL
to others Kimchi peers.

To discover Kimchi peers in the same network, the following API is provided:

GET /peers
[
    https://ubuntu-vm:8001,
    https://rhel-vm:8001
]

Signed-off-by: Aline Manera <alinefm at linux.vnet.ibm.com>
---
 docs/API.md                 |  9 +++++++
 src/kimchi/control/peers.py | 29 ++++++++++++++++++++++
 src/kimchi/mockmodel.py     |  6 +++++
 src/kimchi/model/peers.py   | 59 +++++++++++++++++++++++++++++++++++++++++++++
 tests/test_rest.py          |  4 +++
 5 files changed, 107 insertions(+)
 create mode 100644 src/kimchi/control/peers.py
 create mode 100644 src/kimchi/model/peers.py

diff --git a/docs/API.md b/docs/API.md
index be2fd84..cb761e5 100644
--- a/docs/API.md
+++ b/docs/API.md
@@ -1003,3 +1003,12 @@ http://, ftp:// or file://  URL.
 
 * enable: Enable the Repository as package source
 * disable: Disable the Repository as package source
+
+### Collection: Peers
+
+**URI:** /peers
+
+**Methods:**
+
+* **GET**: Return the list of Kimchi peers in the same network
+           (It uses openSLP for discovering)
diff --git a/src/kimchi/control/peers.py b/src/kimchi/control/peers.py
new file mode 100644
index 0000000..f72a38c
--- /dev/null
+++ b/src/kimchi/control/peers.py
@@ -0,0 +1,29 @@
+#
+# Project Kimchi
+#
+# Copyright IBM, Corp. 2014
+#
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
+#
+# This library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this library; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA
+
+from kimchi.control.base import SimpleCollection
+from kimchi.control.utils import UrlSubNode
+
+
+ at UrlSubNode("peers", True)
+class Peers(SimpleCollection):
+    def __init__(self, model):
+        super(Peers, self).__init__(model)
+        self.role_key = 'peers'
+        self.admin_methods = ['GET']
diff --git a/src/kimchi/mockmodel.py b/src/kimchi/mockmodel.py
index 57a58d7..107aef4 100644
--- a/src/kimchi/mockmodel.py
+++ b/src/kimchi/mockmodel.py
@@ -884,6 +884,12 @@ class MockModel(object):
     def groups_get_list(self):
         return ["groupA", "groupB", "groupC", "groupD"]
 
+    def peers_get_list(self):
+        if kconfig.get("server", "federation") == "off":
+            return []
+
+        return ["https://serverA:8001", "https://serverB:8001"]
+
     def vms_get_list_by_state(self, state):
         ret_list = []
         for name in self.vms_get_list():
diff --git a/src/kimchi/model/peers.py b/src/kimchi/model/peers.py
new file mode 100644
index 0000000..01e9210
--- /dev/null
+++ b/src/kimchi/model/peers.py
@@ -0,0 +1,59 @@
+#
+# Project Kimchi
+#
+# Copyright IBM, Corp. 2014
+#
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
+#
+# This library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this library; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA
+
+import re
+import socket
+
+from kimchi.config import config
+from kimchi.utils import kimchi_log, run_command
+
+
+class PeersModel(object):
+    def __init__(self, **kargs):
+        # check federation feature is enabled on Kimchi server
+        if config.get("server", "federation") == "off":
+            return
+
+        # register server on openslp
+        hostname = socket.getfqdn(config.get("server", "host"))
+        port = config.get("server", "ssl_port")
+        self.url = hostname + ":" + port
+
+        cmd = ["slptool", "register",
+               "service:kimchid://%s:%s" % (hostname, port)]
+        out, error, ret = run_command(cmd)
+        if len(out) != 0:
+            kimchi_log.error("Unable to register server on openSLP."
+                             " Details: %s" % out)
+
+    def get_list(self):
+        # check federation feature is enabled on Kimchi server
+        if config.get("server", "federation") == "off":
+            return []
+
+        peers = []
+        cmd = ["slptool", "findsrvs", "service:kimchid"]
+        out, error, ret = run_command(cmd)
+        for server in out.strip().split("\n"):
+            match = re.match("service:kimchid://(.*?),.*", server)
+            peer = match.group(1)
+            if peer != self.url:
+                peers.append("https://" + peer)
+
+        return peers
diff --git a/tests/test_rest.py b/tests/test_rest.py
index 9066857..a070f14 100644
--- a/tests/test_rest.py
+++ b/tests/test_rest.py
@@ -1539,6 +1539,10 @@ class RestTests(unittest.TestCase):
         self.assertIn('update_tool', conf)
         self.assertIn('repo_mngt_tool', conf)
 
+    def test_peers(self):
+        resp = self.request('/peers').read()
+        self.assertEquals([], json.loads(resp))
+
     def test_auth_unprotected(self):
         hdrs = {'AUTHORIZATION': ''}
         uris = ['/js/kimchi.min.js',
-- 
1.9.3