Add Netbsd support (#62)

Add support for the NetBSD Operating System.                                    
                                                                                
Features in this branch:                                                        
* Add BSD distro parent class from which NetBSD and FreeBSD can                 
  specialize                                                                    
* Add *bsd util functions to cloudinit.net and cloudinit.net.bsd_utils          
* subclass cloudinit.distro.freebsd.Distro from bsd.Distro                      
* Add new cloudinit.distro.netbsd and cloudinit.net.renderer for                
  netbsd                                                                        
* Add lru_cached util.is_NetBSD functions                                       
* Add NetBSD detection for ConfigDrive and NoCloud datasources                  
                                                                                
This branch has been tested with:                                               
                                                                                
- NoCloud and OpenStack (with and without config-drive)                         
- NetBSD 8.1. and 9.0                                                           
- FreeBSD 11.2 and 12.1                                                         
- Python 3.7 only, because of the dependency oncrypt.METHOD_BLOWFISH.           
  This version is available in NetBSD 7, 8 and 9 anyway

1 files changed, 42 insertions, 0 deletions

diff --git a/cloudinit/net/netbsd.py b/cloudinit/net/netbsd.py
new file mode 100644
index 00000000..9cc8ef31
--- /dev/null
+++ b/cloudinit/net/netbsd.py
@@ -0,0 +1,42 @@
+# This file is part of cloud-init. See LICENSE file for license information.
+
+from cloudinit import log as logging
+from cloudinit import util
+import cloudinit.net.bsd
+
+LOG = logging.getLogger(__name__)
+
+
+class Renderer(cloudinit.net.bsd.BSDRenderer):
+
+    def __init__(self, config=None):
+        super(Renderer, self).__init__()
+
+    def write_config(self):
+        if self.dhcp_interfaces():
+            self.set_rc_config_value('dhcpcd', 'YES')
+            self.set_rc_config_value(
+                    'dhcpcd_flags',
+                    ' '.join(self.dhcp_interfaces()))
+        for device_name, v in self.interface_configurations.items():
+            if isinstance(v, dict):
+                self.set_rc_config_value(
+                    'ifconfig_' + device_name,
+                    v.get('address') + ' netmask ' + v.get('netmask'))
+
+    def start_services(self, run=False):
+        if not run:
+            LOG.debug("netbsd generate postcmd disabled")
+            return
+
+        util.subp(['service', 'network', 'restart'], capture=True)
+        if self.dhcp_interfaces():
+            util.subp(['service', 'dhcpcd', 'restart'], capture=True)
+
+    def set_route(self, network, netmask, gateway):
+        if network == '0.0.0.0':
+            self.set_rc_config_value('defaultroute', gateway)
+
+
+def available(target=None):
+    return util.is_NetBSD()