[raspbian] Added support for NTP

Author: Ritwick DSouza

netjsonconfig/backends/raspbian/converters.py

@@ -148,3 +148,15 @@ def to_intermediate(self):
         for domain in dns_search:
             result.append(domain)
         return (('dns_search', result),)
+
+
+class Ntp(BaseConverter):
+    netjson_key = 'ntp'
+
+    def to_intermediate(self):
+        result  = []
+        ntp = get_copy(self.netjson, self.netjson_key)
+        if ntp.get('enabled', False) == True:
+            for server in ntp.get('server'):
+                result.append(server)
+        return (('ntp', result),)

netjsonconfig/backends/raspbian/raspbian.py

@@ -1,4 +1,4 @@
-from .converters import Interfaces, Wireless, DnsServers, DnsSearch
+from .converters import Interfaces, Wireless, DnsServers, DnsSearch, Ntp
 from .renderers import Raspbian
 from ..base.backend import BaseBackend
 from .schema import schema
@@ -15,5 +15,6 @@ class Raspbian(BaseBackend):
         Wireless,
         DnsServers,
         DnsSearch,
+        Ntp
     ]
     renderer = Raspbian

netjsonconfig/backends/raspbian/templates/raspbian.jinja2

@@ -124,3 +124,11 @@ wpa_pairwise={{ wireless.get('encryption').get('wpa_pairwise')}}
 {% else %}
 {% endif %}
 {% endfor %}
+{% for i, j in data.items() %}
+{% if i|string() == 'ntp' %}
+config: /etc/ntp.conf
+{% for server in j %}
+server {{ server }}
+{% endfor %}
+{% endif %}
+{% endfor %}

tests/raspbian/test_system.py

@@ -0,0 +1,27 @@
+import unittest
+
+from netjsonconfig import Raspbian
+from netjsonconfig.utils import _TabsMixin
+
+class TestSystemRender(unittest.TestCase, _TabsMixin):
+
+    def test_ntp(self):
+        o = Raspbian({
+            "ntp": {
+                "enabled": True,
+                "enable_server": False,
+                "server": [
+                    "0.openwrt.pool.ntp.org",
+                    "1.openwrt.pool.ntp.org",
+                    "2.openwrt.pool.ntp.org",
+                    "3.openwrt.pool.ntp.org"
+                ]
+            }
+        })
+
+        expected = '''config: /etc/ntp.config
+server 0.openwrt.pool.ntp.org
+server 1.openwrt.pool.ntp.org
+server 2.openwrt.pool.ntp.org
+server 3.openwrt.pool.ntp.org
+'''