Merge branch 'ip_type_generation' into 'master'

Ip type generation

See merge request re2o/dhcp!3

main.py

@@ -1,64 +1,108 @@
 #!/usr/bin/env python3
-import os
 from configparser import ConfigParser
-import logging
 import socket
 
 from re2oapi import Re2oAPIClient
 
-LOG_LEVEL = logging.INFO
+import sys
+import os
+import subprocess
 
-logger = logging.getLogger()
-logger.setLevel(LOG_LEVEL)
-formatter = logging.Formatter('%(levelname)s :: %(message)s')
-stream_handler = logging.StreamHandler()
-stream_handler.setFormatter(formatter)
-stream_handler.setLevel(LOG_LEVEL)
-logger.addHandler(stream_handler)
-
-BASE_DIR = os.path.dirname(os.path.abspath(__file__))
+path =(os.path.dirname(os.path.abspath(__file__)))
 
 config = ConfigParser()
-config.read(os.path.join(BASE_DIR, 'config.ini'))
+config.read(path+'/config.ini')
 
 api_hostname = config.get('Re2o', 'hostname')
 api_password = config.get('Re2o', 'password')
 api_username = config.get('Re2o', 'username')
 
 def regen_dhcp(api_client):
-    host_mac_ip = {}
+    """Genere les fichiers de zone du DHCP, par extension et par plage d'ip"""
+    host_mac_ip_ext = {}
+    host_mac_ip_type = {}
 
-    for hmi in api_client.list("dhcp/hostmacip/"):
-        if 'ipv4' in hmi:
-            if hmi['extension'] not in host_mac_ip.keys():
-                host_mac_ip[hmi['extension']] = []
-            host_mac_ip[hmi['extension']].append((hmi['hostname'],
-                                                  hmi['mac_address'],
-                                                  hmi['ipv4']))
+    api_res = api_client.list("dhcp/hostmacip/")
+
+    build_hmi(host_mac_ip_ext, api_res, 'extension')
+    build_hmi(host_mac_ip_type, api_res, 'ip_type')
 
     template = ("host {hostname}{extension} {{\n"
                 "    hardware ethernet {mac_address};\n"
                 "    fixed-address {ipv4};\n"
                 "}}")
 
-    for extension, hmi_list in host_mac_ip.items():
+    generate_file(template, host_mac_ip_ext, "dhcp")
+    generate_file(template, host_mac_ip_type, "dhcp.ip_type.")
+
+def build_hmi(host_mac_ip, api_res, key):
+    for hmi in api_res:
+        if hmi[key] not in host_mac_ip.keys():
+            host_mac_ip[hmi[key]] = []
+        host_mac_ip[hmi[key]].append((hmi['hostname'],
+                                      hmi['extension'],
+                                      hmi['mac_address'],
+                                      hmi['ipv4']))
+
+
+def generate_file(template, host_mac_ip, file_prefix):
+     for key, hmi_list in host_mac_ip.items():
         dhcp_leases_content = '\n\n'.join(template.format(
                 hostname=hostname,
                 extension=extension,
                 mac_address=mac_address,
                 ipv4=ipv4
-            ) for hostname, mac_address, ipv4 in hmi_list)
+            ) for hostname, extension, mac_address, ipv4 in hmi_list)
 
-        filename = os.path.join(BASE_DIR, 'generated/dhcp{extension}.list'.format(extension=extension))
+        filename = path+'/generated/{file_prefix}{key}.list'.format(
+                key=key,
+                file_prefix=file_prefix)
         with open(filename, 'w+') as f:
             f.write(dhcp_leases_content)
 
-api_client = Re2oAPIClient(api_hostname, api_username, api_password)
+
+def reload_server():
+    """Relance le serveur DHCP."""
+    try:
+        subprocess.check_output(
+          ['/bin/systemctl', 'restart', 'isc-dhcp-server'],
+            stderr=subprocess.STDOUT)
+    except subprocess.CalledProcessError as err:
+        print(
+            "Erreur lors du redémarrage de isc-dhcp-server.\n"
+            "Code de retour: %s, Sortie:\n%s",
+            err.returncode, err.output.decode())
+        print(err)
+
+
+def check_syntax():
+    """Vérifie la configuration du serveur DHCP."""
+    try:
+        subprocess.check_output(
+            ['/usr/sbin/dhcpd', '-t', '-cf', '/etc/dhcp/dhcpd.conf'],
+            stderr=subprocess.STDOUT)
+    except subprocess.CalledProcessError as err:
+        print(
+            "Erreur lors de la vérification de la configuration DHCP.\n"
+            "Code de retour: %s, Sortie:\n%s",
+            err.returncode, err.output.decode())
+        return False
+    return True
+
+api_client = Re2oAPIClient(api_hostname, api_username, api_password, use_tls=True)
 
 client_hostname = socket.gethostname().split('.', 1)[0]
 
-for service in api_client.list("services/regen", params=dict(hostname=client_hostname)):
-    if service['service_name'] == 'dhcp' and service['need_regen']:
-        logger.info("Regenerating service dhcp")
+for arg in sys.argv:
+    if arg=="--force":
         regen_dhcp(api_client)
+
+for service in api_client.list("services/regen/"):
+    if service['hostname'] == client_hostname and \
+            service['service_name'] == 'dhcp' and \
+            service['need_regen']:
+            regen_dhcp(api_client)
+            if check_syntax():
                 api_client.patch(service['api_url'], data={'need_regen': False})
+                reload_server()
+