Add os-net-config CLI

Adds a new CLI which parses the JSON and calls the configured
provider to apply the configuration.

1 files changed, 103 insertions, 0 deletions

diff --git a/os_net_config/cli.py b/os_net_config/cli.py
new file mode 100755
index 0000000..211322b
--- /dev/null
+++ b/os_net_config/cli.py
@@ -0,0 +1,103 @@
+# -*- coding: utf-8 -*-
+
+# 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.
+
+
+import argparse
+import json
+import logging
+import os
+import sys
+
+import os_net_config
+from os_net_config import impl_eni
+from os_net_config import impl_ifcfg
+from os_net_config import impl_iproute
+from os_net_config import objects
+
+
+def parse_opts(argv):
+    parser = argparse.ArgumentParser(
+        description='Configure host network interfaces using a JSON'
+        ' config file format.')
+    parser.add_argument('-c', '--config-file', metavar='CONFIG_FILE',
+                        help="""path to the configuration file.""",
+                        default='/etc/os-net-config/config.json')
+    parser.add_argument('-p', '--provider', metavar='PROVIDER',
+                        help="""The provider to use."""
+                        """One of: ifcfg, eni, iproute.""",
+                        default=None)
+    parser.add_argument('--version', action='version',
+                        version=os_net_config.__version__)
+    opts = parser.parse_args(argv[1:])
+
+    return opts
+
+
+def main(argv=sys.argv):
+    opts = parse_opts(argv)
+    logger.info('Using config file at: %s' % opts.config_file)
+    iface_array = []
+
+    provider = None
+    if opts.provider:
+        if opts.provider == 'ifcfg':
+            provider = impl_ifcfg.IfcfgNetConfig()
+        elif opts.provider == 'eni':
+            provider = impl_eni.ENINetConfig()
+        elif opts.provider == 'iproute':
+            provider = impl_iproute.IprouteNetConfig()
+        else:
+            logger.error('Invalid provider specified.')
+            return 1
+    else:
+        if os.path.exists('/etc/sysconfig/network-scripts/'):
+            provider = impl_ifcfg.IfcfgNetConfig()
+        elif os.path.exists('/etc/network/'):
+            provider = impl_eni.ENINetConfig()
+        else:
+            logger.error('Unable to set provider for this operating system.')
+            return 1
+
+    if os.path.exists(opts.config_file):
+        with open(opts.config_file) as cf:
+            iface_array = json.loads(cf.read()).get("network_config")
+            logger.debug('network_config JSON: %s' % str(iface_array))
+    else:
+        logger.error('No config file exists at: %s' % opts.config_file)
+        return 1
+    if not isinstance(iface_array, list):
+        logger.error('No interfaces defined in config: %s' % opts.config_file)
+        return 1
+    for iface_json in iface_array:
+        obj = objects.object_from_json(iface_json)
+        provider.addObject(obj)
+    provider.apply()
+    return 0
+
+
+LOG_FORMAT = '[%(asctime)s] [%(levelname)s] %(message)s'
+DATE_FORMAT = '%Y/%m/%d %I:%M:%S %p'
+
+
+def add_handler(logger, handler):
+    handler.setFormatter(logging.Formatter(LOG_FORMAT, datefmt=DATE_FORMAT))
+    logger.addHandler(handler)
+logger = logging.getLogger('os-net-config')
+logger.setLevel(logging.INFO)
+add_handler(logger, logging.StreamHandler())
+if os.geteuid() == 0:
+    add_handler(logger, logging.FileHandler('/var/log/os-net-config.log'))
+
+if __name__ == '__main__':
+    sys.exit(main(sys.argv))