431 lines
16 KiB
Python
431 lines
16 KiB
Python
#!/usr/bin/env python3
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# config.py - Utility functions for pvcnoded configuration parsing
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# Part of the Parallel Virtual Cluster (PVC) system
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#
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# Copyright (C) 2018-2022 Joshua M. Boniface <joshua@boniface.me>
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, version 3.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <https://www.gnu.org/licenses/>.
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#
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###############################################################################
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import daemon_lib.common as common
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import os
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import subprocess
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import yaml
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from socket import gethostname
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from re import findall
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from psutil import cpu_count
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from ipaddress import ip_address, ip_network
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from json import loads
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class MalformedConfigurationError(Exception):
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"""
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An except when parsing the PVC Node daemon configuration file
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"""
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def __init__(self, error=None):
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self.msg = f"ERROR: Configuration file is malformed: {error}"
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def __str__(self):
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return str(self.msg)
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def get_static_data():
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"""
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Data that is obtained once at node startup for use later
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"""
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staticdata = list()
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staticdata.append(str(cpu_count())) # CPU count
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staticdata.append(
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subprocess.run(["uname", "-r"], stdout=subprocess.PIPE)
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.stdout.decode("ascii")
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.strip()
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)
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staticdata.append(
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subprocess.run(["uname", "-o"], stdout=subprocess.PIPE)
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.stdout.decode("ascii")
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.strip()
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)
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staticdata.append(
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subprocess.run(["uname", "-m"], stdout=subprocess.PIPE)
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.stdout.decode("ascii")
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.strip()
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)
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return staticdata
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def get_configuration_path():
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try:
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return os.environ["PVCD_CONFIG_FILE"]
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except KeyError:
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print('ERROR: The "PVCD_CONFIG_FILE" environment variable must be set.')
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os._exit(1)
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def get_hostname():
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node_fqdn = gethostname()
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node_hostname = node_fqdn.split(".", 1)[0]
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node_domain = "".join(node_fqdn.split(".", 1)[1:])
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try:
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node_id = findall(r"\d+", node_hostname)[-1]
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except IndexError:
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node_id = 0
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return node_fqdn, node_hostname, node_domain, node_id
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def validate_floating_ip(config, network):
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if network not in ["cluster", "storage", "upstream"]:
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return False, f'Specified network type "{network}" is not valid'
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floating_key = f"{network}_floating_ip"
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network_key = f"{network}_network"
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# Verify the network provided is valid
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try:
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network = ip_network(config[network_key])
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except Exception:
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return (
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False,
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f"Network address {config[network_key]} for {network_key} is not valid",
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)
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# Verify that the floating IP is valid (and in the network)
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try:
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floating_address = ip_address(config[floating_key].split("/")[0])
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if floating_address not in list(network.hosts()):
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raise
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except Exception:
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return (
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False,
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f"Floating address {config[floating_key]} for {floating_key} is not valid",
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)
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return True, ""
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def get_configuration():
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"""
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Parse the configuration of the node daemon.
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"""
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pvcnoded_config_file = get_configuration_path()
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print('Loading configuration from file "{}"'.format(pvcnoded_config_file))
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with open(pvcnoded_config_file, "r") as cfgfile:
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try:
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o_config = yaml.load(cfgfile, Loader=yaml.SafeLoader)
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except Exception as e:
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print("ERROR: Failed to parse configuration file: {}".format(e))
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os._exit(1)
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node_fqdn, node_hostname, node_domain, node_id = get_hostname()
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# Create the configuration dictionary
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config = dict()
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# Get the initial base configuration
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try:
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o_base = o_config["pvc"]
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o_cluster = o_config["pvc"]["cluster"]
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except Exception as e:
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raise MalformedConfigurationError(e)
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config_general = {
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"node": o_base.get("node", node_hostname),
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"node_hostname": node_hostname,
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"node_fqdn": node_fqdn,
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"node_domain": node_domain,
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"node_id": node_id,
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"coordinators": o_cluster.get("coordinators", list()),
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"debug": o_base.get("debug", False),
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}
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config = {**config, **config_general}
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# Get the functions configuration
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try:
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o_functions = o_config["pvc"]["functions"]
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except Exception as e:
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raise MalformedConfigurationError(e)
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config_functions = {
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"enable_hypervisor": o_functions.get("enable_hypervisor", False),
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"enable_networking": o_functions.get("enable_networking", False),
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"enable_storage": o_functions.get("enable_storage", False),
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"enable_api": o_functions.get("enable_api", False),
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}
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config = {**config, **config_functions}
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# Get the directory configuration
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try:
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o_directories = o_config["pvc"]["system"]["configuration"]["directories"]
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except Exception as e:
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raise MalformedConfigurationError(e)
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config_directories = {
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"plugin_directory": o_directories.get(
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"plugin_directory", "/usr/share/pvc/plugins"
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),
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"dynamic_directory": o_directories.get("dynamic_directory", None),
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"log_directory": o_directories.get("log_directory", None),
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"console_log_directory": o_directories.get("console_log_directory", None),
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}
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# Define our dynamic directory schema
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config_directories["dnsmasq_dynamic_directory"] = (
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config_directories["dynamic_directory"] + "/dnsmasq"
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)
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config_directories["pdns_dynamic_directory"] = (
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config_directories["dynamic_directory"] + "/pdns"
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)
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config_directories["nft_dynamic_directory"] = (
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config_directories["dynamic_directory"] + "/nft"
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)
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# Define our log directory schema
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config_directories["dnsmasq_log_directory"] = (
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config_directories["log_directory"] + "/dnsmasq"
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)
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config_directories["pdns_log_directory"] = (
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config_directories["log_directory"] + "/pdns"
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)
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config_directories["nft_log_directory"] = (
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config_directories["log_directory"] + "/nft"
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)
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config = {**config, **config_directories}
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# Get the logging configuration
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try:
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o_logging = o_config["pvc"]["system"]["configuration"]["logging"]
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except Exception as e:
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raise MalformedConfigurationError(e)
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config_logging = {
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"file_logging": o_logging.get("file_logging", False),
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"stdout_logging": o_logging.get("stdout_logging", False),
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"zookeeper_logging": o_logging.get("zookeeper_logging", False),
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"log_colours": o_logging.get("log_colours", False),
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"log_dates": o_logging.get("log_dates", False),
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"log_keepalives": o_logging.get("log_keepalives", False),
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"log_keepalive_cluster_details": o_logging.get(
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"log_keepalive_cluster_details", False
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),
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"log_keepalive_storage_details": o_logging.get(
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"log_keepalive_storage_details", False
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),
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"console_log_lines": o_logging.get("console_log_lines", False),
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"node_log_lines": o_logging.get("node_log_lines", False),
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}
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config = {**config, **config_logging}
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# Get the interval configuration
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try:
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o_intervals = o_config["pvc"]["system"]["intervals"]
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except Exception as e:
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raise MalformedConfigurationError(e)
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config_intervals = {
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"vm_shutdown_timeout": int(o_intervals.get("vm_shutdown_timeout", 60)),
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"keepalive_interval": int(o_intervals.get("keepalive_interval", 5)),
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"fence_intervals": int(o_intervals.get("fence_intervals", 6)),
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"suicide_intervals": int(o_intervals.get("suicide_interval", 0)),
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}
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config = {**config, **config_intervals}
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# Get the fencing configuration
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try:
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o_fencing = o_config["pvc"]["system"]["fencing"]
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o_fencing_actions = o_fencing["actions"]
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o_fencing_ipmi = o_fencing["ipmi"]
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except Exception as e:
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raise MalformedConfigurationError(e)
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config_fencing = {
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"successful_fence": o_fencing_actions.get("successful_fence", None),
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"failed_fence": o_fencing_actions.get("failed_fence", None),
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"ipmi_hostname": o_fencing_ipmi.get(
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"host", f"{node_hostname}-lom.{node_domain}"
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),
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"ipmi_username": o_fencing_ipmi.get("user", "null"),
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"ipmi_password": o_fencing_ipmi.get("pass", "null"),
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}
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config = {**config, **config_fencing}
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# Get the migration configuration
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try:
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o_migration = o_config["pvc"]["system"]["migration"]
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except Exception as e:
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raise MalformedConfigurationError(e)
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config_migration = {
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"migration_target_selector": o_migration.get("target_selector", "mem"),
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}
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config = {**config, **config_migration}
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if config["enable_networking"]:
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# Get the node networks configuration
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try:
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o_networks = o_config["pvc"]["cluster"]["networks"]
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o_network_cluster = o_networks["cluster"]
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o_network_storage = o_networks["storage"]
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o_network_upstream = o_networks["upstream"]
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o_sysnetworks = o_config["pvc"]["system"]["configuration"]["networking"]
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o_sysnetwork_cluster = o_sysnetworks["cluster"]
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o_sysnetwork_storage = o_sysnetworks["storage"]
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o_sysnetwork_upstream = o_sysnetworks["upstream"]
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except Exception as e:
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raise MalformedConfigurationError(e)
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config_networks = {
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"cluster_domain": o_network_cluster.get("domain", None),
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"cluster_network": o_network_cluster.get("network", None),
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"cluster_floating_ip": o_network_cluster.get("floating_ip", None),
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"cluster_dev": o_sysnetwork_cluster.get("device", None),
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"cluster_mtu": o_sysnetwork_cluster.get("mtu", None),
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"cluster_dev_ip": o_sysnetwork_cluster.get("address", None),
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"storage_domain": o_network_storage.get("domain", None),
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"storage_network": o_network_storage.get("network", None),
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"storage_floating_ip": o_network_storage.get("floating_ip", None),
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"storage_dev": o_sysnetwork_storage.get("device", None),
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"storage_mtu": o_sysnetwork_storage.get("mtu", None),
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"storage_dev_ip": o_sysnetwork_storage.get("address", None),
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"upstream_domain": o_network_upstream.get("domain", None),
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"upstream_network": o_network_upstream.get("network", None),
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"upstream_floating_ip": o_network_upstream.get("floating_ip", None),
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"upstream_gateway": o_network_upstream.get("gateway", None),
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"upstream_dev": o_sysnetwork_upstream.get("device", None),
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"upstream_mtu": o_sysnetwork_upstream.get("mtu", None),
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"upstream_dev_ip": o_sysnetwork_upstream.get("address", None),
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"bridge_dev": o_sysnetworks.get("bridge_device", None),
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"bridge_mtu": o_sysnetworks.get("bridge_mtu", None),
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"enable_sriov": o_sysnetworks.get("sriov_enable", False),
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"sriov_device": o_sysnetworks.get("sriov_device", list()),
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}
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if config_networks["bridge_mtu"] is None:
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# Read the current MTU of bridge_dev and set bridge_mtu to it; avoids weird resets
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retcode, stdout, stderr = common.run_os_command(
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f"ip -json link show dev {config_networks['bridge_dev']}"
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)
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current_bridge_mtu = loads(stdout)[0]["mtu"]
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print(
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f"Config key bridge_mtu not explicitly set; using live MTU {current_bridge_mtu} from {config_networks['bridge_dev']}"
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)
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config_networks["bridge_mtu"] = current_bridge_mtu
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config = {**config, **config_networks}
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for network_type in ["cluster", "storage", "upstream"]:
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result, msg = validate_floating_ip(config, network_type)
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if not result:
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raise MalformedConfigurationError(msg)
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address_key = "{}_dev_ip".format(network_type)
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network_key = f"{network_type}_network"
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network = ip_network(config[network_key])
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# With autoselection of addresses, construct an IP from the relevant network
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if config[address_key] == "by-id":
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# The NodeID starts at 1, but indexes start at 0
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address_id = int(config["node_id"]) - 1
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# Grab the nth address from the network
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config[address_key] = "{}/{}".format(
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list(network.hosts())[address_id], network.prefixlen
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)
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# Validate the provided IP instead
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else:
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try:
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address = ip_address(config[address_key].split("/")[0])
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if address not in list(network.hosts()):
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raise
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except Exception:
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raise MalformedConfigurationError(
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f"IP address {config[address_key]} for {address_key} is not valid"
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)
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# Get the PowerDNS aggregator database configuration
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try:
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o_pdnsdb = o_config["pvc"]["coordinator"]["dns"]["database"]
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except Exception as e:
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raise MalformedConfigurationError(e)
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config_pdnsdb = {
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"pdns_postgresql_host": o_pdnsdb.get("host", None),
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"pdns_postgresql_port": o_pdnsdb.get("port", None),
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"pdns_postgresql_dbname": o_pdnsdb.get("name", None),
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"pdns_postgresql_user": o_pdnsdb.get("user", None),
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"pdns_postgresql_password": o_pdnsdb.get("pass", None),
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}
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config = {**config, **config_pdnsdb}
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# Get the Cloud-Init Metadata database configuration
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try:
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o_metadatadb = o_config["pvc"]["coordinator"]["metadata"]["database"]
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except Exception as e:
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raise MalformedConfigurationError(e)
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config_metadatadb = {
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"metadata_postgresql_host": o_metadatadb.get("host", None),
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"metadata_postgresql_port": o_metadatadb.get("port", None),
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"metadata_postgresql_dbname": o_metadatadb.get("name", None),
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"metadata_postgresql_user": o_metadatadb.get("user", None),
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"metadata_postgresql_password": o_metadatadb.get("pass", None),
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}
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config = {**config, **config_metadatadb}
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if config["enable_storage"]:
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# Get the storage configuration
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try:
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o_storage = o_config["pvc"]["system"]["configuration"]["storage"]
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except Exception as e:
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raise MalformedConfigurationError(e)
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config_storage = {
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"ceph_config_file": o_storage.get("ceph_config_file", None),
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"ceph_admin_keyring": o_storage.get("ceph_admin_keyring", None),
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}
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config = {**config, **config_storage}
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# Add our node static data to the config
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config["static_data"] = get_static_data()
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return config
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def validate_directories(config):
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if not os.path.exists(config["dynamic_directory"]):
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os.makedirs(config["dynamic_directory"])
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os.makedirs(config["dnsmasq_dynamic_directory"])
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os.makedirs(config["pdns_dynamic_directory"])
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os.makedirs(config["nft_dynamic_directory"])
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if not os.path.exists(config["log_directory"]):
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os.makedirs(config["log_directory"])
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os.makedirs(config["dnsmasq_log_directory"])
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os.makedirs(config["pdns_log_directory"])
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os.makedirs(config["nft_log_directory"])
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