diff options
Diffstat (limited to 'src/conf_mode/vrrp.py')
| -rwxr-xr-x | src/conf_mode/vrrp.py | 339 |
1 files changed, 113 insertions, 226 deletions
diff --git a/src/conf_mode/vrrp.py b/src/conf_mode/vrrp.py index 680a80859..e8f1c1f99 100755 --- a/src/conf_mode/vrrp.py +++ b/src/conf_mode/vrrp.py @@ -1,6 +1,6 @@ #!/usr/bin/env python3 # -# Copyright (C) 2018-2020 VyOS maintainers and contributors +# Copyright (C) 2018-2021 VyOS maintainers and contributors # # This program is free software; you can redistribute it and/or modify # it under the terms of the GNU General Public License version 2 or later as @@ -17,244 +17,131 @@ import os from sys import exit -from ipaddress import ip_address, ip_interface, IPv4Interface, IPv6Interface, IPv4Address, IPv6Address -from json import dumps -from pathlib import Path - -import vyos.config - -from vyos import ConfigError -from vyos.util import call -from vyos.template import render +from ipaddress import ip_interface +from ipaddress import IPv4Interface +from ipaddress import IPv6Interface +from vyos.config import Config +from vyos.configdict import dict_merge from vyos.ifconfig.vrrp import VRRP - +from vyos.template import render +from vyos.template import is_ipv4 +from vyos.template import is_ipv6 +from vyos.util import call +from vyos.xml import defaults +from vyos import ConfigError from vyos import airbag airbag.enable() def get_config(config=None): - vrrp_groups = [] - sync_groups = [] - if config: - config = config + conf = config else: - config = vyos.config.Config() - - # Get the VRRP groups - for group_name in config.list_nodes("high-availability vrrp group"): - config.set_level("high-availability vrrp group {0}".format(group_name)) - - # Retrieve the values - group = {"preempt": True, "use_vmac": False, "disable": False} - - if config.exists("disable"): - group["disable"] = True - - group["name"] = group_name - group["vrid"] = config.return_value("vrid") - group["interface"] = config.return_value("interface") - group["description"] = config.return_value("description") - group["advertise_interval"] = config.return_value("advertise-interval") - group["priority"] = config.return_value("priority") - group["hello_source"] = config.return_value("hello-source-address") - group["peer_address"] = config.return_value("peer-address") - group["sync_group"] = config.return_value("sync-group") - group["preempt_delay"] = config.return_value("preempt-delay") - group["virtual_addresses"] = config.return_values("virtual-address") - group["virtual_addresses_excluded"] = config.return_values("virtual-address-excluded") - - group["auth_password"] = config.return_value("authentication password") - group["auth_type"] = config.return_value("authentication type") - - group["health_check_script"] = config.return_value("health-check script") - group["health_check_interval"] = config.return_value("health-check interval") - group["health_check_count"] = config.return_value("health-check failure-count") - - group["master_script"] = config.return_value("transition-script master") - group["backup_script"] = config.return_value("transition-script backup") - group["fault_script"] = config.return_value("transition-script fault") - group["stop_script"] = config.return_value("transition-script stop") - group["script_mode_force"] = config.exists("transition-script mode-force") - - if config.exists("no-preempt"): - group["preempt"] = False - if config.exists("rfc3768-compatibility"): - group["use_vmac"] = True - - # Substitute defaults where applicable - if not group["advertise_interval"]: - group["advertise_interval"] = 1 - if not group["priority"]: - group["priority"] = 100 - if not group["preempt_delay"]: - group["preempt_delay"] = 0 - if not group["health_check_interval"]: - group["health_check_interval"] = 60 - if not group["health_check_count"]: - group["health_check_count"] = 3 - - # FIXUP: translate our option for auth type to keepalived's syntax - # for simplicity - if group["auth_type"]: - if group["auth_type"] == "plaintext-password": - group["auth_type"] = "PASS" - else: - group["auth_type"] = "AH" - - vrrp_groups.append(group) - - config.set_level("") - - # Get the sync group used for conntrack-sync - conntrack_sync_group = None - if config.exists("service conntrack-sync failover-mechanism vrrp"): - conntrack_sync_group = config.return_value("service conntrack-sync failover-mechanism vrrp sync-group") - - # Get the sync groups - for sync_group_name in config.list_nodes("high-availability vrrp sync-group"): - config.set_level("high-availability vrrp sync-group {0}".format(sync_group_name)) - - sync_group = {"conntrack_sync": False} - sync_group["name"] = sync_group_name - sync_group["members"] = config.return_values("member") - if conntrack_sync_group: - if conntrack_sync_group == sync_group_name: - sync_group["conntrack_sync"] = True - - # add transition script configuration - sync_group["master_script"] = config.return_value("transition-script master") - sync_group["backup_script"] = config.return_value("transition-script backup") - sync_group["fault_script"] = config.return_value("transition-script fault") - sync_group["stop_script"] = config.return_value("transition-script stop") - - sync_groups.append(sync_group) - - # create a file with dict with proposed configuration - with open("{}.temp".format(VRRP.location['vyos']), 'w') as dict_file: - dict_file.write(dumps({'vrrp_groups': vrrp_groups, 'sync_groups': sync_groups})) - - return (vrrp_groups, sync_groups) - - -def verify(data): - vrrp_groups, sync_groups = data - - for group in vrrp_groups: - # Check required fields - if not group["vrid"]: - raise ConfigError("vrid is required but not set in VRRP group {0}".format(group["name"])) - if not group["interface"]: - raise ConfigError("interface is required but not set in VRRP group {0}".format(group["name"])) - if not group["virtual_addresses"]: - raise ConfigError("virtual-address is required but not set in VRRP group {0}".format(group["name"])) - - if group["auth_password"] and (not group["auth_type"]): - raise ConfigError("authentication type is required but not set in VRRP group {0}".format(group["name"])) - - # Keepalived doesn't allow mixing IPv4 and IPv6 in one group, so we mirror that restriction - - # XXX: filter on map object is destructive, so we force it to list. - # Additionally, filter objects always evaluate to True, empty or not, - # so we force them to lists as well. - vaddrs = list(map(lambda i: ip_interface(i), group["virtual_addresses"])) - vaddrs4 = list(filter(lambda x: isinstance(x, IPv4Interface), vaddrs)) - vaddrs6 = list(filter(lambda x: isinstance(x, IPv6Interface), vaddrs)) - - if vaddrs4 and vaddrs6: - raise ConfigError("VRRP group {0} mixes IPv4 and IPv6 virtual addresses, this is not allowed. Create separate groups for IPv4 and IPv6".format(group["name"])) - - if vaddrs4: - if group["hello_source"]: - hsa = ip_address(group["hello_source"]) - if isinstance(hsa, IPv6Address): - raise ConfigError("VRRP group {0} uses IPv4 but its hello-source-address is IPv6".format(group["name"])) - if group["peer_address"]: - pa = ip_address(group["peer_address"]) - if isinstance(pa, IPv6Address): - raise ConfigError("VRRP group {0} uses IPv4 but its peer-address is IPv6".format(group["name"])) - - if vaddrs6: - if group["hello_source"]: - hsa = ip_address(group["hello_source"]) - if isinstance(hsa, IPv4Address): - raise ConfigError("VRRP group {0} uses IPv6 but its hello-source-address is IPv4".format(group["name"])) - if group["peer_address"]: - pa = ip_address(group["peer_address"]) - if isinstance(pa, IPv4Address): - raise ConfigError("VRRP group {0} uses IPv6 but its peer-address is IPv4".format(group["name"])) - - # Warn the user about the deprecated mode-force option - if group['script_mode_force']: - print("""Warning: "transition-script mode-force" VRRP option is deprecated and will be removed in VyOS 1.4.""") - print("""It's no longer necessary, so you can safely remove it from your config now.""") - - # Disallow same VRID on multiple interfaces - _groups = sorted(vrrp_groups, key=(lambda x: x["interface"])) - count = len(_groups) - 1 - index = 0 - while (index < count): - if (_groups[index]["vrid"] == _groups[index + 1]["vrid"]) and (_groups[index]["interface"] == _groups[index + 1]["interface"]): - raise ConfigError("VRID {0} is used in groups {1} and {2} that both use interface {3}. Groups on the same interface must use different VRIDs".format( - _groups[index]["vrid"], _groups[index]["name"], _groups[index + 1]["name"], _groups[index]["interface"])) - else: - index += 1 - + conf = Config() + + base = ['high-availability', 'vrrp'] + if not conf.exists(base): + return None + + vrrp = conf.get_config_dict(base, key_mangling=('-', '_'), + get_first_key=True, no_tag_node_value_mangle=True) + # We have gathered the dict representation of the CLI, but there are default + # options which we need to update into the dictionary retrived. + if 'group' in vrrp: + default_values = defaults(base + ['group']) + for group in vrrp['group']: + vrrp['group'][group] = dict_merge(default_values, vrrp['group'][group]) + + ## Get the sync group used for conntrack-sync + conntrack_path = ['service', 'conntrack-sync', 'failover-mechanism', 'vrrp', 'sync-group'] + if conf.exists(conntrack_path): + vrrp['conntrack_sync_group'] = conf.return_value(conntrack_path) + + return vrrp + +def verify(vrrp): + if not vrrp: + return None + + used_vrid_if = [] + if 'group' in vrrp: + for group, group_config in vrrp['group'].items(): + # Check required fields + if 'vrid' not in group_config: + raise ConfigError(f'VRID is required but not set in VRRP group "{group}"') + + if 'interface' not in group_config: + raise ConfigError(f'Interface is required but not set in VRRP group "{group}"') + + if 'address' not in group_config: + raise ConfigError(f'Virtual IP address is required but not set in VRRP group "{group}"') + + if 'authentication' in group_config: + if not {'password', 'type'} <= set(group_config['authentication']): + raise ConfigError(f'Authentication requires both type and passwortd to be set in VRRP group "{group}"') + + # We can not use a VRID once per interface + interface = group_config['interface'] + vrid = group_config['vrid'] + tmp = {'interface': interface, 'vrid': vrid} + if tmp in used_vrid_if: + raise ConfigError(f'VRID "{vrid}" can only be used once on interface "{interface}"!') + used_vrid_if.append(tmp) + + # Keepalived doesn't allow mixing IPv4 and IPv6 in one group, so we mirror that restriction + + # XXX: filter on map object is destructive, so we force it to list. + # Additionally, filter objects always evaluate to True, empty or not, + # so we force them to lists as well. + vaddrs = list(map(lambda i: ip_interface(i), group_config['address'])) + vaddrs4 = list(filter(lambda x: isinstance(x, IPv4Interface), vaddrs)) + vaddrs6 = list(filter(lambda x: isinstance(x, IPv6Interface), vaddrs)) + + if vaddrs4 and vaddrs6: + raise ConfigError(f'VRRP group "{group}" mixes IPv4 and IPv6 virtual addresses, this is not allowed.\n' \ + 'Create individual groups for IPv4 and IPv6!') + if vaddrs4: + if 'hello_source_address' in group_config: + if is_ipv6(group_config['hello_source_address']): + raise ConfigError(f'VRRP group "{group}" uses IPv4 but hello-source-address is IPv6!') + + if 'peer_address' in group_config: + if is_ipv6(group_config['peer_address']): + raise ConfigError(f'VRRP group "{group}" uses IPv4 but peer-address is IPv6!') + + if vaddrs6: + if 'hello_source_address' in group_config: + if is_ipv4(group_config['hello_source_address']): + raise ConfigError(f'VRRP group "{group}" uses IPv6 but hello-source-address is IPv4!') + + if 'peer_address' in group_config: + if is_ipv4(group_config['peer_address']): + raise ConfigError(f'VRRP group "{group}" uses IPv6 but peer-address is IPv4!') # Check sync groups - vrrp_group_names = list(map(lambda x: x["name"], vrrp_groups)) - - for sync_group in sync_groups: - for m in sync_group["members"]: - if not (m in vrrp_group_names): - raise ConfigError("VRRP sync-group {0} refers to VRRP group {1}, but group {1} does not exist".format(sync_group["name"], m)) - - -def generate(data): - vrrp_groups, sync_groups = data - - # Remove disabled groups from the sync group member lists - for sync_group in sync_groups: - for member in sync_group["members"]: - g = list(filter(lambda x: x["name"] == member, vrrp_groups))[0] - if g["disable"]: - print("Warning: ignoring disabled VRRP group {0} in sync-group {1}".format(g["name"], sync_group["name"])) - # Filter out disabled groups - vrrp_groups = list(filter(lambda x: x["disable"] is not True, vrrp_groups)) - - render(VRRP.location['config'], 'vrrp/keepalived.conf.tmpl', - {"groups": vrrp_groups, "sync_groups": sync_groups}) - render(VRRP.location['daemon'], 'vrrp/daemon.tmpl', {}) + if 'sync_group' in vrrp: + for sync_group, sync_config in vrrp['sync_group'].items(): + if 'member' in sync_config: + for member in sync_config['member']: + if member not in vrrp['group']: + raise ConfigError(f'VRRP sync-group "{sync_group}" refers to VRRP group "{member}", '\ + 'but it does not exist!') + +def generate(vrrp): + if not vrrp: + return None + + render(VRRP.location['config'], 'vrrp/keepalived.conf.tmpl', vrrp) return None +def apply(vrrp): + service_name = 'keepalived.service' + if not vrrp: + call(f'systemctl stop {service_name}') + return None -def apply(data): - vrrp_groups, sync_groups = data - if vrrp_groups: - # safely rename a temporary file with configuration dict - try: - dict_file = Path("{}.temp".format(VRRP.location['vyos'])) - dict_file.rename(Path(VRRP.location['vyos'])) - except Exception as err: - print("Unable to rename the file with keepalived config for FIFO pipe: {}".format(err)) - - if not VRRP.is_running(): - print("Starting the VRRP process") - ret = call("systemctl restart keepalived.service") - else: - print("Reloading the VRRP process") - ret = call("systemctl reload keepalived.service") - - if ret != 0: - raise ConfigError("keepalived failed to start") - else: - # VRRP is removed in the commit - print("Stopping the VRRP process") - call("systemctl stop keepalived.service") - os.unlink(VRRP.location['daemon']) - + call(f'systemctl restart {service_name}') return None - if __name__ == '__main__': try: c = get_config() @@ -262,5 +149,5 @@ if __name__ == '__main__': generate(c) apply(c) except ConfigError as e: - print("VRRP error: {0}".format(str(e))) + print(e) exit(1) |