diff --git a/netbox_zabbix_sync.py b/netbox_zabbix_sync.py new file mode 100755 index 0000000..f9e4a1c --- /dev/null +++ b/netbox_zabbix_sync.py @@ -0,0 +1,577 @@ +#!/usr/bin/python3 +"""Netbox to Zabbix sync script.""" + +from os import environ +import logging +import argparse +from pynetbox import api +from pyzabbix import ZabbixAPI, ZabbixAPIException + +# Set logging +log_format = logging.Formatter('%(asctime)s - %(name)s - ' + '%(levelname)s - %(message)s') +lgout = logging.StreamHandler() +lgout.setFormatter(log_format) +lgout.setLevel(logging.DEBUG) + +lgfile = logging.FileHandler("sync.log") +lgfile.setFormatter(log_format) +lgfile.setLevel(logging.DEBUG) + +logger = logging.getLogger("Netbox-Zabbix-sync") +logger.addHandler(lgout) +logger.addHandler(lgfile) +logger.setLevel(logging.WARNING) + +template_cf = "zabbix_template" +device_cf = "zabbix_hostid" + + +def main(arguments): + """Module that runs the sync process.""" + # set environment variables + if(arguments.verbose): + logger.setLevel(logging.DEBUG) + env_vars = ["ZABBIX_HOST", "ZABBIX_USER", "ZABBIX_PASS", + "NETBOX_HOST", "NETBOX_TOKEN"] + for var in env_vars: + if var not in environ: + e = f"Environment variable {var} has not been defined." + logger.error(e) + raise EnvironmentVarError(e) + # Get all virtual environment variables + zabbix_host = environ.get("ZABBIX_HOST") + zabbix_user = environ.get("ZABBIX_USER") + zabbix_pass = environ.get("ZABBIX_PASS") + netbox_host = environ.get("NETBOX_HOST") + netbox_token = environ.get("NETBOX_TOKEN") + + # Set Zabbix API + try: + zabbix = ZabbixAPI(zabbix_host) + zabbix.login(zabbix_user, zabbix_pass) + except ZabbixAPIException as e: + e = f"Zabbix returned the following error: {str(e)}." + logger.error(e) + # Set Netbox API + netbox = api(netbox_host, netbox_token, threading=True) + # Get all Zabbix and Netbox data + netbox_devices = netbox.dcim.devices.all() + zabbix_groups = zabbix.hostgroup.get(output=['name']) + zabbix_templates = zabbix.template.get(output=['name']) + # Go through all Netbox devices + for nb_device in netbox_devices: + try: + device = NetworkDevice(nb_device, zabbix) + # Checks if device is part of cluster. + # Requires the cluster argument. + if(device.isCluster() and arguments.cluster): + # Check if device is master or slave + if(device.promoteMasterDevice()): + e = (f"Device {device.name} is " + f"part of cluster and primary.") + logger.info(e) + else: + # Device is secondary in cluster. + # Don't continue with this device. + e = (f"Device {device.name} is part of cluster " + f"but not primary. Skipping this host...") + logger.info(e) + continue + # With -t flag: add Tenant name to hostgroup name. + if(arguments.tenant): + if(device.tenant): + device.hg_format.insert(1, device.tenant.name) + device.setHostgroup() + logger.debug(f"Added Tenant {device.tenant.name} to " + f"hostgroup format of {device.name}.") + else: + logger.debug(f"{device.name} is not linked to a tenant. " + f"Using HG format '{device.hostgroup}'.") + # Checks if device is in cleanup state + if(device.status != "Active"): + if(device.zabbix_id): + # Delete device from Zabbix + # and remove hostID from Netbox. + device.cleanup() + logger.info(f"Cleaned up host {device.name}.") + + else: + # Device has been added to Netbox + # but is not in Activate state + logger.info(f"Skipping host {device.name} since its " + f"not in the active state.") + continue + if(device.zabbix_id): + # Device is already present in Zabbix + device.ConsistencyCheck(zabbix_groups, zabbix_templates) + else: + # Add hostgroup is flag is true + # and Hostgroup is not present in Zabbix + if(not device.hostgroup and arguments.hostgroups): + # Create new hostgroup + device.createZabbixHostgroup() + zabbix_groups = zabbix.hostgroup.get(output=['name']) + # Add device to Zabbix + device.createInZabbix(zabbix_groups, zabbix_templates) + except SyncError: + pass + + +class SyncError(Exception): + pass + + +class SyncExternalError(SyncError): + pass + + +class SyncInventoryError(SyncError): + pass + + +class SyncDuplicateError(SyncError): + pass + + +class EnvironmentVarError(SyncError): + pass + + +class InterfaceConfigError(SyncError): + pass + + +class NetworkDevice(): + """ + Represents Network device. + INPUT: (Netbox device class, ZabbixAPI class) + """ + def __init__(self, nb, zabbix): + self.nb = nb + self.id = nb.id + self.name = nb.name + self.status = nb.status.label + self.zabbix = zabbix + self.tenant = nb.tenant + self.hostgroup = None + self.hg_format = [self.nb.site.name, + self.nb.device_type.manufacturer.name, + self.nb.device_role.name] + self._setBasics() + self.setHostgroup() + + def _setBasics(self): + """ + Sets basic information like IP address. + """ + # Return error if device does not have primary IP. + if(self.nb.primary_ip): + self.cidr = self.nb.primary_ip.address + self.ip = self.cidr.split("/")[0] + else: + e = f"Device {self.name}: no primary IP." + logger.warning(e) + raise SyncInventoryError(e) + + # Check if device_type has custom field + device_type_cf = self.nb.device_type.custom_fields + if(template_cf in device_type_cf): + self.template_name = device_type_cf[template_cf] + else: + e = (f"Custom field {template_cf} not " + f"found for {self.nb.device_type.name}.") + logger.warning(e) + raise SyncInventoryError(e) + + # Check if device has custom field + if(device_cf in self.nb.custom_fields): + self.zabbix_id = self.nb.custom_fields[device_cf] + else: + e = f"Custom field {template_cf} not found for {self.name}." + logger.warning(e) + raise SyncInventoryError(e) + + def setHostgroup(self): + """Sets hostgroup to a string with hg_format parameters.""" + self.hostgroup = "/".join(self.hg_format) + + def isCluster(self): + """ + Checks if device is part of cluster. + """ + if(self.nb.virtual_chassis): + return True + else: + return False + + def getClusterMaster(self): + """ + Returns chassis master ID. + """ + if(not self.isCluster()): + e = (f"Unable to proces {self.name} for cluster calculation: " + f"not part of a cluster.") + logger.warning(e) + raise SyncInventoryError(e) + else: + return self.nb.virtual_chassis.master.id + + def promoteMasterDevice(self): + """ + If device is Primary in cluster, + promote device name to the cluster name. + Returns True if succesfull, returns False if device is secondary. + """ + masterid = self.getClusterMaster() + if(masterid == self.id): + logger.debug(f"Device {self.name} is primary cluster member. " + f"Modifying hostname from {self.name} to " + + f"{self.nb.virtual_chassis.name}.") + self.name = self.nb.virtual_chassis.name + return True + else: + logger.debug(f"Device {self.name} is non-primary cluster member.") + return False + + def getZabbixTemplate(self, templates): + """ + Returns Zabbix template ID + INPUT: list of templates + OUTPUT: True + """ + if(not self.template_name): + e = (f"Device template '{self.nb.device_type.display_name}' " + "has no Zabbix template defined.") + logger.info(e) + raise SyncInventoryError() + for template in templates: + if(template['name'] == self.template_name): + self.template_id = template['templateid'] + e = (f"Found template ID {str(template['templateid'])} " + f"for host {self.name}.") + logger.debug(e) + return True + else: + e = (f"Unable to find template {self.template_name} " + f"for host {self.name} in Zabbix.") + logger.warning(e) + raise SyncInventoryError(e) + + def getZabbixGroup(self, groups): + """ + Returns Zabbix group ID + INPUT: list of hostgroups + OUTPUT: True / False + """ + # Go through all groups + for group in groups: + if(group['name'] == self.hostgroup): + self.group_id = group['groupid'] + e = (f"Found group {group['name']} for host {self.name}.") + #e = (f"Found group ID {str(group['groupid'])} " + # f"for host {self.name}.") + logger.debug(e) + return True + else: + e = (f"Unable to find group '{self.hostgroup}' " + f"for host {self.name} in Zabbix.") + logger.warning(e) + raise SyncInventoryError(e) + + def cleanup(self): + """ + Removes device from external resources. + Resets custom fields in Netbox. + """ + if(self.zabbix_id): + try: + self.zabbix.host.delete(self.zabbix_id) + self.nb.custom_fields[device_cf] = None + self.nb.save() + e = f"Deleted host {self.name} from Zabbix." + logger.info(e) + except ZabbixAPIException as e: + e = f"Zabbix returned the following error: {str(e)}." + logger.error(e) + raise SyncExternalError(e) + + def _zabbixHostnameExists(self): + """ + Checks if hostname exists in Zabbix. + """ + host = self.zabbix.host.get(filter={'name': self.name}, output=[]) + if(host): + return True + else: + return False + + def setInterfaceDetails(self): + """ + Checks interface parameters from Netbox and + creates a model for the interface to be used in Zabbix. + """ + try: + # Initiate interface class + interface = ZabbixInterface(self.nb.config_context, self.ip) + # Check if Netbox has device context. + # If not fall back to old config. + if(interface.get_context()): + # If device is SNMP type, add aditional information. + if(interface.type == 2): + interface.set_snmp() + else: + interface.set_default() + return [interface.interface] + except InterfaceConfigError as e: + e = f"{self.name}: {e}" + logger.warning(e) + raise SyncInventoryError(e) + + def createInZabbix(self, groups, templates, + description="Host added by Netbox sync script."): + """ + Creates Zabbix host object with parameters from Netbox object. + """ + # Check if hostname is already present in Zabbix + if(not self._zabbixHostnameExists()): + # Get group and template ID's for host + if(not self.getZabbixGroup(groups)): + raise SyncInventoryError() + self.getZabbixTemplate(templates) + # Set interface, group and template configuration + interfaces = self.setInterfaceDetails() + groups = [{"groupid": self.group_id}] + templates = [{"templateid": self.template_id}] + # Add host to Zabbix + try: + host = self.zabbix.host.create(host=self.name, status=0, + interfaces=interfaces, + groups=groups, + templates=templates, + description=description) + self.zabbix_id = host["hostids"][0] + except ZabbixAPIException as e: + e = f"Couldn't add {self.name}, Zabbix returned {str(e)}." + logger.error(e) + raise SyncExternalError(e) + # Set Netbox custom field to hostID value. + self.nb.custom_fields[device_cf] = self.zabbix_id + self.nb.save() + logger.info(f"Created host {self.name} in Zabbix.") + else: + e = f"Unable to add {self.name} to Zabbix: host already present." + logger.warning(e) + + def createZabbixHostgroup(self): + """ + Creates Zabbix host group based on hostgroup format. + """ + try: + self.zabbix.hostgroup.create(name=self.hostgroup) + e = f"Added hostgroup '{self.hostgroup}'." + logger.info(e) + except ZabbixAPIException as e: + e = f"Couldn't add hostgroup, Zabbix returned {str(e)}." + logger.error(e) + raise SyncExternalError(e) + + def updateZabbixHost(self, **kwargs): + """ + Updates Zabbix host with given parameters. + INPUT: Key word arguments for Zabbix host object. + """ + try: + self.zabbix.host.update(hostid=self.zabbix_id, **kwargs) + except ZabbixAPIException as e: + e = f"Zabbix returned the following error: {str(e)}." + logger.error(e) + raise SyncExternalError(e) + logger.info(f"Updated host {self.name} with data {kwargs}.") + + def ConsistencyCheck(self, groups, templates): + """ + Checks if Zabbix object is still valid with Netbox parameters. + """ + self.getZabbixGroup(groups) + self.getZabbixTemplate(templates) + host = self.zabbix.host.get(filter={'hostid': self.zabbix_id}, + selectInterfaces=['type', 'ip', + 'port', 'details', + 'interfaceid'], + selectGroups=["id"], + selectParentTemplates=["id"]) + if(len(host) > 1): + e = (f"Got {len(host)} results for Zabbix hosts " + f"with ID {self.zabbix_id} - hostname {self.name}.") + logger.error(e) + raise SyncInventoryError(e) + elif(len(host) == 0): + e = (f"No Zabbix host found for {self.name}. " + f"This is likely the result of a deleted Zabbix host " + f"without zeroing the ID field in Netbox.") + logger.error(e) + raise SyncInventoryError(e) + else: + host = host[0] + + if(host["host"] == self.name): + logger.debug(f"Device {self.name}: hostname in-sync.") + else: + logger.warning(f"Device {self.name}: hostname OUT of sync. " + f"Received value: {host['host']}") + self.updateZabbixHost(host=self.name) + + for template in host["parentTemplates"]: + if(template["templateid"] == self.template_id): + logger.debug(f"Device {self.name}: template in-sync.") + break + else: + logger.warning(f"Device {self.name}: template OUT of sync.") + self.updateZabbixHost(templates=self.template_id) + + for group in host["groups"]: + if(group["groupid"] == self.group_id): + logger.debug(f"Device {self.name}: hostgroup in-sync.") + break + else: + logger.warning(f"Device {self.name}: hostgroup OUT of sync.") + self.updateZabbixHost(groups={'groupid': self.group_id}) + + if(len(host['interfaces']) == 1): + # If only 1 interface has been found + updates = {} + # Go through each key / item and check if it matches Zabbix + for key, item in self.setInterfaceDetails()[0].items(): + # Check if Netbox value is found in Zabbix + if(key in host["interfaces"][0]): + # If SNMP is used, go through nested dict + # to compare SNMP parameters + if(type(item) == dict and key == "details"): + for k, i in item.items(): + if(k in host["interfaces"][0][key]): + # Set update if values don't match + if(host["interfaces"][0][key][k] != str(i)): + # If dict has not been created, add it + if(key not in updates): + updates[key] = {} + updates[key][k] = str(i) + continue + # Set update if values don't match + if(host["interfaces"][0][key] != str(item)): + updates[key] = item + if(updates): + logger.warning(f"Device {self.name}: Interface OUT of sync.") + updates["interfaceid"] = host["interfaces"][0]['interfaceid'] + logger.debug(f"{self.name}: Updating interface " + f"config {updates}") + try: + self.zabbix.hostinterface.update(updates) + e = f"Solved {self.name} interface conflict." + logger.info(e) + except ZabbixAPIException as e: + e = f"Zabbix returned the following error: {str(e)}." + logger.error(e) + raise SyncExternalError(e) + else: + e = f"Device {self.name}: interface in-sync." + logger.debug(e) + else: + e = (f"Device {self.name} has conflicting IP. Host has total " + f"of {len(host['interfaces'])} interfaces. Manual " + "interfention required.") + logger.error(e) + SyncInventoryError(e) + + +class ZabbixInterface(): + def __init__(self, context, ip): + self.context = context + self.type = None + self.ip = ip + self.skelet = {"main": "1", "useip": "1", "dns": "", "ip": self.ip} + self.interface = self.skelet + + def get_context(self): + if("zabbix" in self.context): + try: + zabbix = self.context["zabbix"] + self.interface["type"] = zabbix["interface_type"] + self.interface["port"] = zabbix["interface_port"] + self.type = zabbix["interface_type"] + except KeyError: + e = ("Interface port or type is not defined under " + "config context 'zabbix'.") + raise InterfaceConfigError(e) + return True + else: + return False + + def set_snmp(self): + if(self.interface["type"] == 2): + if("snmp" in self.context["zabbix"]): + snmp = self.context["zabbix"]["snmp"] + self.interface["details"] = {} + if(snmp.get("bulk")): + self.interface["details"]["bulk"] = str(snmp.pop("bulk")) + else: + e = "SNMP bulk option is not defined." + raise InterfaceConfigError(e) + if(snmp.get("version")): + self.interface["details"]["version"] = str(snmp.pop("version")) + else: + e = "SNMP version option is not defined." + raise InterfaceConfigError(e) + if(self.interface["details"]["version"] == '2'): + if("community" in snmp): + community = snmp["community"] + self.interface["details"]["community"] = str(community) + else: + e = ("No SNMP community string " + "defined in custom context.") + raise InterfaceConfigError(e) + elif(self.interface["details"]["version"] == '3'): + items = ["securityname", "securitylevel", "authpassphrase", + "privpassphrase", "authprotocol", "privprotocol", + "contextname"] + for key, item in snmp.items(): + if(key in items): + self.interface["details"][key] = str(item) + else: + e = "Unsupported SNMP version." + raise InterfaceConfigError(e) + else: + e = "Interface type SNMP but no parameters provided." + raise InterfaceConfigError(e) + else: + e = "Interface type is not SNMP, unable to set SNMP details" + raise InterfaceConfigError(e) + + def set_default(self): + self.interface = self.skelet + self.interface["type"] = "2" + self.interface["port"] = "161" + self.interface["details"] = {"version": "2", + "community": "{$SNMP_COMMUNITY}", + "bulk": "1"} + +if(__name__ == "__main__"): + # Arguments parsing + parser = argparse.ArgumentParser( + description='A script to sync Zabbix with Netbox device data.' + ) + parser.add_argument("-v", "--verbose", help="Turn on debugging.", + action="store_true") + parser.add_argument("-c", "--cluster", action="store_true", + help=("Only add the primary node of a cluster " + "to Zabbix. Usefull when a shared virtual IP is " + "used for the control plane.")) + parser.add_argument("-H", "--hostgroups", + help="Create Zabbix hostgroups if not present", + action="store_true") + parser.add_argument("-t", "--tenant", action="store_true", + help=("Add Tenant name to the Zabbix " + "hostgroup name scheme.")) + args = parser.parse_args() + + main(args)