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Integrate metadata API into node daemon

This commit is contained in:
Joshua Boniface 2019-12-14 15:55:30 -05:00
parent 8c36e7618a
commit b3e21a5bf8
5 changed files with 242 additions and 8 deletions
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4
debian/control vendored
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@ -8,8 +8,8 @@ X-Python3-Version: >= 3.2
Package: pvc-daemon
Architecture: all
Depends: python3-kazoo, python3-psutil, python3-apscheduler, python3-libvirt, python3-psycopg2, python3-dnspython, python3-yaml, ipmitool, libvirt-daemon-system, arping, vlan, bridge-utils, dnsmasq, nftables, pdns-server, pdns-backend-pgsql
Suggests: pvc-client-cli
Depends: pvc-client-common, python3-kazoo, python3-psutil, python3-apscheduler, python3-libvirt, python3-psycopg2, python3-dnspython, python3-yaml, ipmitool, libvirt-daemon-system, arping, vlan, bridge-utils, dnsmasq, nftables, pdns-server, pdns-backend-pgsql
Suggests: pvc-client-api, pvc-client-cli
Description: Parallel Virtual Cluster virtualization daemon (Python 3)
A KVM/Zookeeper/Ceph-based VM and private cloud manager
.

16
node-daemon/pvcd.sample.yaml
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@ -25,8 +25,6 @@ pvc:
enable_storage: True
# enable_api: Enable or disable the API client, if installed, when node is Primary
enable_api: True
# enable_provisioner: Enable or disable the Provisioner client, if installed, when node is Primary
enable_provisioner: True
# cluster: Cluster-level configuration
cluster:
# coordinators: The list of cluster coordinator hostnames
@ -80,6 +78,20 @@ pvc:
user: pvcdns
# pass: PostgreSQL user password, randomly generated
pass: pvcdns
# metadata: Metadata API subsystem
metadata:
# database: Patroni PostgreSQL database configuration
database:
# host: PostgreSQL hostname, invariably 'localhost'
host: localhost
# port: PostgreSQL port, invariably 'localhost'
port: 5432
# name: PostgreSQL database name, invariably 'pvcprov'
name: pvcprov
# user: PostgreSQL username, invariable 'pvcprov'
user: pvcprov
# pass: PostgreSQL user password, randomly generated
pass: pvcprov
# system: Local PVC instance configuration
system:
# intervals: Intervals for keepalives and fencing

13
node-daemon/pvcd/Daemon.py
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@ -52,6 +52,7 @@ import pvcd.NodeInstance as NodeInstance
import pvcd.VXNetworkInstance as VXNetworkInstance
import pvcd.DNSAggregatorInstance as DNSAggregatorInstance
import pvcd.CephInstance as CephInstance
import pvcd.MetadataAPIInstance as MetadataAPIInstance
###############################################################################
# PVCD - node daemon startup program
@ -194,6 +195,11 @@ def readConfig(pvcd_config_file, myhostname):
'pdns_postgresql_dbname': o_config['pvc']['coordinator']['dns']['database']['name'],
'pdns_postgresql_user': o_config['pvc']['coordinator']['dns']['database']['user'],
'pdns_postgresql_password': o_config['pvc']['coordinator']['dns']['database']['pass'],
'metadata_postgresql_host': o_config['pvc']['coordinator']['metadata']['database']['host'],
'metadata_postgresql_port': o_config['pvc']['coordinator']['metadata']['database']['port'],
'metadata_postgresql_dbname': o_config['pvc']['coordinator']['metadata']['database']['name'],
'metadata_postgresql_user': o_config['pvc']['coordinator']['metadata']['database']['user'],
'metadata_postgresql_password': o_config['pvc']['coordinator']['metadata']['database']['pass'],
'vni_dev': o_config['pvc']['system']['configuration']['networking']['cluster']['device'],
'vni_mtu': o_config['pvc']['system']['configuration']['networking']['cluster']['mtu'],
'vni_dev_ip': o_config['pvc']['system']['configuration']['networking']['cluster']['address'],
@ -726,13 +732,16 @@ pool_list = []
volume_list = dict() # Dict of Lists
if enable_networking:
# Create an instance of the DNS Aggregator if we're a coordinator
# Create an instance of the DNS Aggregator and Metadata API if we're a coordinator
if config['daemon_mode'] == 'coordinator':
dns_aggregator = DNSAggregatorInstance.DNSAggregatorInstance(zk_conn, config, logger)
metadata_api = MetadataAPIInstance.MetadataAPIInstance(zk_conn, config, logger)
else:
dns_aggregator = None
metadata_api = None
else:
dns_aggregator = None
metadata_api = None
# Node objects
@zk_conn.ChildrenWatch('/nodes')
@ -742,7 +751,7 @@ def update_nodes(new_node_list):
# Add any missing nodes to the list
for node in new_node_list:
if not node in node_list:
d_node[node] = NodeInstance.NodeInstance(node, myhostname, zk_conn, config, logger, d_node, d_network, d_domain, dns_aggregator)
d_node[node] = NodeInstance.NodeInstance(node, myhostname, zk_conn, config, logger, d_node, d_network, d_domain, dns_aggregator, metadata_api)
# Remove any deleted nodes from the list
for node in node_list:

186
node-daemon/pvcd/MetadataAPIInstance.py Normal file
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@ -0,0 +1,186 @@
#!/usr/bin/env python3
# MetadataAPIInstance.py - Class implementing an EC2-compatible cloud-init Metadata server
# Part of the Parallel Virtual Cluster (PVC) system
#
# Copyright (C) 2018-2019 Joshua M. Boniface <joshua@boniface.me>
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <https://www.gnu.org/licenses/>.
#
###############################################################################
import gevent.pywsgi
import flask
import threading
import sys
import psycopg2
from psycopg2.extras import RealDictCursor
# The metadata server requires client libraries
import client_lib.vm as pvc_vm
import client_lib.network as pvc_network
class MetadataAPIInstance(object):
mdapi = flask.Flask(__name__)
# Initialization function
def __init__(self, zk_conn, config, logger):
self.zk_conn = zk_conn
self.config = config
self.logger = logger
self.thread = None
self.md_http_server = None
# Add flask routes inside our instance
def add_routes(self):
@self.mdapi.route('/', methods=['GET'])
def api_root():
return flask.jsonify({"message": "PVC Provisioner Metadata API version 1"}), 209
@self.mdapi.route('/<version>/meta-data/', methods=['GET'])
def api_metadata_root(version):
metadata = """instance-id\nname\nprofile"""
return metadata, 200
@self.mdapi.route('/<version>/meta-data/instance-id', methods=['GET'])
def api_metadata_instanceid(version):
source_address = flask.request.__dict__['environ']['REMOTE_ADDR']
vm_details = self.get_vm_details(source_address)
instance_id = vm_details['uuid']
return instance_id, 200
@self.mdapi.route('/<version>/meta-data/name', methods=['GET'])
def api_metadata_hostname(version):
source_address = flask.request.__dict__['environ']['REMOTE_ADDR']
vm_details = self.get_vm_details(source_address)
vm_name = vm_details['name']
return vm_name, 200
@self.mdapi.route('/<version>/meta-data/profile', methods=['GET'])
def api_metadata_profile(version):
source_address = flask.request.__dict__['environ']['REMOTE_ADDR']
vm_details = self.get_vm_details(source_address)
vm_profile = vm_details['profile']
return vm_profile, 200
@self.mdapi.route('/<version>/user-data', methods=['GET'])
def api_userdata(version):
source_address = flask.request.__dict__['environ']['REMOTE_ADDR']
vm_details = self.get_vm_details(source_address)
vm_profile = vm_details['profile']
# Get the userdata
userdata = self.get_profile_userdata(vm_profile)
self.logger.out("Returning userdata for profile {}".format(vm_profile), state='i', prefix='Metadata API')
return flask.Response(userdata)
def launch_wsgi(self):
try:
self.add_routes()
self.md_http_server = gevent.pywsgi.WSGIServer(
('169.254.169.254', 80),
self.mdapi,
log=sys.stdout,
error_log=sys.stdout
)
self.md_http_server.serve_forever()
except Exception as e:
self.logger.out('Error starting Metadata API: {}'.format(e), state='e')
# WSGI start/stop
def start(self):
# Launch Metadata API
self.logger.out('Starting Metadata API at 169.254.169.254:80', state='i')
self.thread = threading.Thread(target=self.launch_wsgi)
self.thread.start()
self.logger.out('Successfully started Metadata API thread', state='o')
def stop(self):
self.logger.out('Stopping Metadata API at 169.254.169.254:80', state='i')
if self.thread and self.md_http_server:
try:
self.md_http_server.stop()
self.md_http_server.close()
self.logger.out('Successfully stopped Metadata API', state='o')
except Exception as e:
self.logger.out('Error stopping Metadata API: {}'.format(e), state='e')
# Helper functions
def open_database(self):
conn = psycopg2.connect(
host=self.config['metadata_postgresql_host'],
port=self.config['metadata_postgresql_port'],
dbname=self.config['metadata_postgresql_dbname'],
user=self.config['metadata_postgresql_user'],
password=self.config['metadata_postgresql_password']
)
cur = conn.cursor(cursor_factory=RealDictCursor)
return conn, cur
def close_database(self, conn, cur):
cur.close()
conn.close()
# Obtain a list of templates
def get_profile_userdata(self, vm_profile):
query = """SELECT userdata FROM profile
JOIN userdata_template ON profile.userdata_template = userdata_template.id
WHERE profile.name = %s;
"""
args = (vm_profile,)
conn, cur = self.open_database()
cur.execute(query, args)
data_raw = cur.fetchone()
self.close_database(conn, cur)
data = data_raw['userdata']
return data
# VM details function
def get_vm_details(self, source_address):
# Start connection to Zookeeper
_discard, networks = pvc_network.get_list(self.zk_conn, None)
# Figure out which server this is via the DHCP address
host_information = dict()
networks_managed = (x for x in networks if x['type'] == 'managed')
for network in networks_managed:
network_leases = pvc_network.getNetworkDHCPLeases(self.zk_conn, network['vni'])
for network_lease in network_leases:
information = pvc_network.getDHCPLeaseInformation(self.zk_conn, network['vni'], network_lease)
try:
if information['ip4_address'] == source_address:
host_information = information
except:
pass
# Get our real information on the host; now we can start querying about it
client_hostname = host_information['hostname']
client_macaddr = host_information['mac_address']
client_ipaddr = host_information['ip4_address']
# Find the VM with that MAC address - we can't assume that the hostname is actually right
_discard, vm_list = pvc_vm.get_list(self.zk_conn, None, None, None)
vm_name = None
vm_details = dict()
for vm in vm_list:
try:
for network in vm['networks']:
if network['mac'] == client_macaddr:
vm_name = vm['name']
vm_details = vm
except:
pass
return vm_details

31
node-daemon/pvcd/NodeInstance.py
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@ -34,7 +34,7 @@ import pvcd.common as common
class NodeInstance(object):
# Initialization function
def __init__(self, name, this_node, zk_conn, config, logger, d_node, d_network, d_domain, dns_aggregator):
def __init__(self, name, this_node, zk_conn, config, logger, d_node, d_network, d_domain, dns_aggregator, metadata_api):
# Passed-in variables on creation
self.name = name
self.this_node = this_node
@ -53,6 +53,7 @@ class NodeInstance(object):
self.d_network = d_network
self.d_domain = d_domain
self.dns_aggregator = dns_aggregator
self.metadata_api = metadata_api
# Printable lists
self.active_node_list = []
self.flushed_node_list = []
@ -269,8 +270,9 @@ class NodeInstance(object):
for network in self.d_network:
self.d_network[network].stopDHCPServer()
self.d_network[network].removeGateways()
self.removeFloatingAddresses()
self.dns_aggregator.stop_aggregator()
self.metadata_api.stop()
self.removeFloatingAddresses()
def become_primary(self):
# Establish a lock
@ -318,6 +320,7 @@ class NodeInstance(object):
# Start the DNS aggregator instance
time.sleep(1)
self.dns_aggregator.start_aggregator()
self.metadata_api.start()
# Start the clients
if self.config['enable_api']:
@ -327,6 +330,17 @@ class NodeInstance(object):
common.run_os_command("systemctl start pvc-provisioner-worker.service")
def createFloatingAddresses(self):
# Metadata link-local IP
self.logger.out(
'Creating Metadata link-local IP {}/{} on interface {}'.format(
'169.254.169.254',
'32',
'lo'
),
state='o'
)
common.createIPAddress('169.254.169.254', '32', 'lo')
# VNI floating IP
self.logger.out(
'Creating floating management IP {}/{} on interface {}'.format(
@ -337,6 +351,7 @@ class NodeInstance(object):
state='o'
)
common.createIPAddress(self.vni_ipaddr, self.vni_cidrnetmask, 'brcluster')
# Upstream floating IP
self.logger.out(
'Creating floating upstream IP {}/{} on interface {}'.format(
@ -349,6 +364,17 @@ class NodeInstance(object):
common.createIPAddress(self.upstream_ipaddr, self.upstream_cidrnetmask, self.upstream_dev)
def removeFloatingAddresses(self):
# Metadata link-local IP
self.logger.out(
'Removing Metadata link-local IP {}/{} from interface {}'.format(
'169.254.169.254',
'32',
'lo'
),
state='o'
)
common.removeIPAddress('169.254.169.254', '32', 'lo')
# VNI floating IP
self.logger.out(
'Removing floating management IP {}/{} from interface {}'.format(
@ -359,6 +385,7 @@ class NodeInstance(object):
state='o'
)
common.removeIPAddress(self.vni_ipaddr, self.vni_cidrnetmask, 'brcluster')
# Upstream floating IP
self.logger.out(
'Removing floating upstream IP {}/{} from interface {}'.format(