#!/usr/bin/env python3 # pvcapi_provisioner.py - PVC Provisioner functions # Part of the Parallel Virtual Cluster (PVC) system # # Copyright (C) 2018-2019 Joshua M. Boniface # # 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 . # ############################################################################### import flask import json import psycopg2 import psycopg2.extras import os import re import time import shlex import subprocess import client_lib.common as pvc_common import client_lib.node as pvc_node import client_lib.vm as pvc_vm import client_lib.network as pvc_network import client_lib.ceph as pvc_ceph import api_lib.libvirt_schema as libvirt_schema # # Exceptions (used by Celery tasks) # class ValidationError(Exception): """ An exception that results from some value being un- or mis-defined. """ pass class ClusterError(Exception): """ An exception that results from the PVC cluster being out of alignment with the action. """ pass class ProvisioningError(Exception): """ An exception that results from a failure of a provisioning command. """ pass # # Common functions # # Database connections def open_database(config): conn = psycopg2.connect( host=config['database_host'], port=config['database_port'], dbname=config['database_name'], user=config['database_user'], password=config['database_password'] ) cur = conn.cursor(cursor_factory=psycopg2.extras.RealDictCursor) return conn, cur def close_database(conn, cur, failed=False): if not failed: conn.commit() cur.close() conn.close() # # Template List functions # def list_template(limit, table, is_fuzzy=True): if limit: if is_fuzzy: # Handle fuzzy vs. non-fuzzy limits if not re.match('\^.*', limit): limit = '%' + limit else: limit = limit[1:] if not re.match('.*\$', limit): limit = limit + '%' else: limit = limit[:-1] args = (limit, ) query = "SELECT * FROM {} WHERE name LIKE %s;".format(table) else: args = () query = "SELECT * FROM {};".format(table) conn, cur = open_database(config) cur.execute(query, args) data = cur.fetchall() if table == 'network_template': for template_id, template_data in enumerate(data): # Fetch list of VNIs from network table query = "SELECT vni FROM network WHERE network_template = %s;" args = (template_data['id'],) cur.execute(query, args) vnis = cur.fetchall() data[template_id]['networks'] = vnis if table == 'storage_template': for template_id, template_data in enumerate(data): # Fetch list of VNIs from network table query = "SELECT * FROM storage WHERE storage_template = %s;" args = (template_data['id'],) cur.execute(query, args) disks = cur.fetchall() data[template_id]['disks'] = disks close_database(conn, cur) return data def list_template_system(limit, is_fuzzy=True): """ Obtain a list of system templates. """ data = list_template(limit, 'system_template', is_fuzzy) return data def list_template_network(limit, is_fuzzy=True): """ Obtain a list of network templates. """ data = list_template(limit, 'network_template', is_fuzzy) return data def list_template_network_vnis(name): """ Obtain a list of network template VNIs. """ data = list_template(name, 'network_template', is_fuzzy=False)[0] networks = data['networks'] return networks def list_template_storage(limit, is_fuzzy=True): """ Obtain a list of storage templates. """ data = list_template(limit, 'storage_template', is_fuzzy) return data def list_template_storage_disks(name): """ Obtain a list of storage template disks. """ data = list_template(name, 'storage_template', is_fuzzy=False)[0] disks = data['disks'] return disks def list_template_userdata(limit, is_fuzzy=True): """ Obtain a list of userdata templates. """ data = list_template(limit, 'userdata_template', is_fuzzy) return data def template_list(limit): system_templates = list_template_system(limit) network_templates = list_template_network(limit) storage_templates = list_template_storage(limit) userdata_templates = list_template_userdata(limit) return { "system_templates": system_templates, "network_templates": network_templates, "storage_templates": storage_templates, "userdata_templates": userdata_templates } # # Template Create functions # def create_template_system(name, vcpu_count, vram_mb, serial=False, vnc=False, vnc_bind=None, node_limit=None, node_selector=None, start_with_node=False): if list_template_system(name, is_fuzzy=False): retmsg = { "message": "The system template {} already exists".format(name) } retcode = 400 return flask.jsonify(retmsg), retcode query = "INSERT INTO system_template (name, vcpu_count, vram_mb, serial, vnc, vnc_bind, node_limit, node_selector, start_with_node) VALUES (%s, %s, %s, %s, %s, %s, %s, %s, %s);" args = (name, vcpu_count, vram_mb, serial, vnc, vnc_bind, node_limit, node_selector, start_with_node) conn, cur = open_database(config) try: cur.execute(query, args) retmsg = { "name": name } retcode = 200 except psycopg2.IntegrityError as e: retmsg = { "message": "Failed to create entry {}".format(name), "error": e } retcode = 400 close_database(conn, cur) return flask.jsonify(retmsg), retcode def create_template_network(name, mac_template=None): if list_template_network(name, is_fuzzy=False): retmsg = { "message": "The network template {} already exists".format(name) } retcode = 400 return flask.jsonify(retmsg), retcode conn, cur = open_database(config) try: query = "INSERT INTO network_template (name, mac_template) VALUES (%s, %s);" args = (name, mac_template) cur.execute(query, args) retmsg = { "name": name } retcode = 200 except psycopg2.IntegrityError as e: retmsg = { "message": "Failed to create entry {}".format(name), "error": e } retcode = 400 close_database(conn, cur) return flask.jsonify(retmsg), retcode def create_template_network_element(name, vni): if not list_template_network(name, is_fuzzy=False): retmsg = { "message": "The network template {} does not exist".format(name) } retcode = 400 return flask.jsonify(retmsg), retcode networks = list_template_network_vnis(name) found_vni = False for network in networks: if int(network['vni']) == vni: found_vni = True if found_vni: retmsg = { "message": "The VNI {} in network template {} already exists".format(vni, name) } retcode = 400 return flask.jsonify(retmsg), retcode conn, cur = open_database(config) try: query = "SELECT id FROM network_template WHERE name = %s;" args = (name,) cur.execute(query, args) template_id = cur.fetchone()['id'] query = "INSERT INTO network (network_template, vni) VALUES (%s, %s);" args = (template_id, vni) cur.execute(query, args) retmsg = { "name": name, "vni": vni } retcode = 200 except psycopg2.IntegrityError as e: retmsg = { "message": "Failed to create entry {}".format(vni), "error": e } retcode = 400 close_database(conn, cur) return flask.jsonify(retmsg), retcode def create_template_storage(name): if list_template_storage(name, is_fuzzy=False): retmsg = { "message": "The storage template {} already exists".format(name) } retcode = 400 return flask.jsonify(retmsg), retcode conn, cur = open_database(config) try: query = "INSERT INTO storage_template (name) VALUES (%s);" args = (name,) cur.execute(query, args) retmsg = { "name": name } retcode = 200 except psycopg2.IntegrityError as e: retmsg = { "message": "Failed to create entry {}".format(name), "error": e } retcode = 400 close_database(conn, cur) return flask.jsonify(retmsg), retcode def create_template_storage_element(name, pool, disk_id, disk_size_gb, filesystem=None, filesystem_args=[], mountpoint=None): if not list_template_storage(name, is_fuzzy=False): retmsg = { "message": "The storage template {} does not exist".format(name) } retcode = 400 return flask.jsonify(retmsg), retcode disks = list_template_storage_disks(name) found_disk = False for disk in disks: if disk['disk_id'] == disk_id: found_disk = True if found_disk: retmsg = { "message": "The disk {} in storage template {} already exists".format(disk_id, name) } retcode = 400 return flask.jsonify(retmsg), retcode if mountpoint and not filesystem: retmsg = { "message": "A filesystem must be specified along with a mountpoint." } retcode = 400 return flask.jsonify(retmsg), retcode conn, cur = open_database(config) try: query = "SELECT id FROM storage_template WHERE name = %s;" args = (name,) cur.execute(query, args) template_id = cur.fetchone()['id'] query = "INSERT INTO storage (storage_template, pool, disk_id, disk_size_gb, mountpoint, filesystem, filesystem_args) VALUES (%s, %s, %s, %s, %s, %s, %s);" args = (template_id, pool, disk_id, disk_size_gb, mountpoint, filesystem, ' '.join(filesystem_args)) cur.execute(query, args) retmsg = { "name": name, "disk_id": disk_id } retcode = 200 except psycopg2.IntegrityError as e: retmsg = { "message": "Failed to create entry {}".format(disk_id), "error": e } retcode = 400 close_database(conn, cur) return flask.jsonify(retmsg), retcode def create_template_userdata(name, userdata): if list_template_userdata(name, is_fuzzy=False): retmsg = { "message": "The userdata template {} already exists".format(name) } retcode = 400 return flask.jsonify(retmsg), retcode conn, cur = open_database(config) try: query = "INSERT INTO userdata_template (name, userdata) VALUES (%s, %s);" args = (name, userdata) cur.execute(query, args) retmsg = { "name": name } retcode = 200 except psycopg2.IntegrityError as e: retmsg = { "message": "Failed to create entry {}".format(name), "error": e } retcode = 400 close_database(conn, cur) return flask.jsonify(retmsg), retcode # # Template update functions # def update_template_userdata(name, userdata): if not list_template_userdata(name, is_fuzzy=False): retmsg = { "message": "The userdata template {} does not exist".format(name) } retcode = 400 return flask.jsonify(retmsg), retcode tid = list_template_userdata(name, is_fuzzy=False)[0]['id'] conn, cur = open_database(config) try: query = "UPDATE userdata_template SET userdata = %s WHERE id = %s;" args = (userdata, tid) cur.execute(query, args) retmsg = { "name": name } retcode = 200 except psycopg2.IntegrityError as e: retmsg = { "message": "Failed to update entry {}".format(name), "error": e } retcode = 400 close_database(conn, cur) return flask.jsonify(retmsg), retcode # # Template Delete functions # def delete_template_system(name): if not list_template_system(name, is_fuzzy=False): retmsg = { "message": "The system template {} does not exist".format(name) } retcode = 400 return flask.jsonify(retmsg), retcode conn, cur = open_database(config) try: query = "DELETE FROM system_template WHERE name = %s;" args = (name,) cur.execute(query, args) retmsg = { "name": name } retcode = 200 except psycopg2.IntegrityError as e: retmsg = { "message": "Failed to delete entry {}".format(name), "error": e } retcode = 400 close_database(conn, cur) return flask.jsonify(retmsg), retcode def delete_template_network(name): if not list_template_network(name, is_fuzzy=False): retmsg = { "message": "The network template {} does not exist".format(name) } retcode = 400 return flask.jsonify(retmsg), retcode conn, cur = open_database(config) try: query = "SELECT id FROM network_template WHERE name = %s;" args = (name,) cur.execute(query, args) template_id = cur.fetchone()['id'] query = "DELETE FROM network WHERE network_template = %s;" args = (template_id,) cur.execute(query, args) query = "DELETE FROM network_template WHERE name = %s;" args = (name,) cur.execute(query, args) retmsg = { "name": name } retcode = 200 except psycopg2.IntegrityError as e: retmsg = { "message": "Failed to delete entry {}".format(name), "error": e } retcode = 400 close_database(conn, cur) return flask.jsonify(retmsg), retcode def delete_template_network_element(name, vni): if not list_template_network(name, is_fuzzy=False): retmsg = { "message": "The network template {} does not exist".format(name) } retcode = 400 return flask.jsonify(retmsg), retcode networks = list_template_network_vnis(name) found_vni = False for network in networks: if network['vni'] == int(vni): found_vni = True if not found_vni: retmsg = { "message": "The VNI {} in network template {} does not exist".format(vni, name) } retcode = 400 return flask.jsonify(retmsg), retcode conn, cur = open_database(config) try: query = "SELECT id FROM network_template WHERE name = %s;" args = (name,) cur.execute(query, args) template_id = cur.fetchone()['id'] query = "DELETE FROM network WHERE network_template = %s and vni = %s;" args = (template_id, vni) cur.execute(query, args) retmsg = { "name": name, "vni": vni } retcode = 200 except psycopg2.IntegrityError as e: retmsg = { "message": "Failed to delete entry {}".format(name), "error": e } retcode = 400 close_database(conn, cur) return flask.jsonify(retmsg), retcode def delete_template_storage(name): if not list_template_storage(name, is_fuzzy=False): retmsg = { "message": "The storage template {} does not exist".format(name) } retcode = 400 return flask.jsonify(retmsg), retcode conn, cur = open_database(config) try: query = "SELECT id FROM storage_template WHERE name = %s;" args = (name,) cur.execute(query, args) template_id = cur.fetchone()['id'] query = "DELETE FROM storage WHERE storage_template = %s;" args = (template_id,) cur.execute(query, args) query = "DELETE FROM storage_template WHERE name = %s;" args = (name,) cur.execute(query, args) retmsg = { "name": name } retcode = 200 except psycopg2.IntegrityError as e: retmsg = { "message": "Failed to delete entry {}".format(name), "error": e } retcode = 400 close_database(conn, cur) return flask.jsonify(retmsg), retcode def delete_template_storage_element(name, disk_id): if not list_template_storage(name, is_fuzzy=False): retmsg = { "message": "The storage template {} does not exist".format(name) } retcode = 400 return flask.jsonify(retmsg), retcode disks = list_template_storage_disks(name) found_disk = False for disk in disks: if disk['disk_id'] == disk_id: found_disk = True if not found_disk: retmsg = { "message": "The disk {} in storage template {} does not exist".format(disk_id, name) } retcode = 400 return flask.jsonify(retmsg), retcode conn, cur = open_database(config) try: query = "SELECT id FROM storage_template WHERE name = %s;" args = (name,) cur.execute(query, args) template_id = cur.fetchone()['id'] query = "DELETE FROM storage WHERE storage_template = %s and disk_id = %s;" args = (template_id, disk_id) cur.execute(query, args) retmsg = { "name": name, "disk_id": disk_id } retcode = 200 except psycopg2.IntegrityError as e: retmsg = { "message": "Failed to delete entry {}".format(name), "error": e } retcode = 400 close_database(conn, cur) return flask.jsonify(retmsg), retcode def delete_template_userdata(name): if not list_template_userdata(name, is_fuzzy=False): retmsg = { "message": "The userdata template {} does not exist".format(name) } retcode = 400 return flask.jsonify(retmsg), retcode conn, cur = open_database(config) try: query = "DELETE FROM userdata_template WHERE name = %s;" args = (name,) cur.execute(query, args) retmsg = { "name": name } retcode = 200 except psycopg2.IntegrityError as e: retmsg = { "message": "Failed to delete entry {}".format(name), "error": e } retcode = 400 close_database(conn, cur) return flask.jsonify(retmsg), retcode # # Script functions # def list_script(limit, is_fuzzy=True): if limit: if is_fuzzy: # Handle fuzzy vs. non-fuzzy limits if not re.match('\^.*', limit): limit = '%' + limit else: limit = limit[1:] if not re.match('.*\$', limit): limit = limit + '%' else: limit = limit[:-1] query = "SELECT * FROM {} WHERE name LIKE %s;".format('script') args = (limit, ) else: query = "SELECT * FROM {};".format('script') args = () conn, cur = open_database(config) cur.execute(query, args) data = cur.fetchall() close_database(conn, cur) return data def create_script(name, script): if list_script(name, is_fuzzy=False): retmsg = { "message": "The script {} already exists".format(name) } retcode = 400 return flask.jsonify(retmsg), retcode conn, cur = open_database(config) try: query = "INSERT INTO script (name, script) VALUES (%s, %s);" args = (name, script) cur.execute(query, args) retmsg = { "name": name } retcode = 200 except psycopg2.IntegrityError as e: retmsg = { "message": "Failed to create entry {}".format(name), "error": e } retcode = 400 close_database(conn, cur) return flask.jsonify(retmsg), retcode def update_script(name, script): if not list_script(name, is_fuzzy=False): retmsg = { "message": "The script {} does not exist".format(name) } retcode = 400 return flask.jsonify(retmsg), retcode tid = list_script(name, is_fuzzy=False)[0]['id'] conn, cur = open_database(config) try: query = "UPDATE script SET script = %s WHERE id = %s;" args = (script, tid) cur.execute(query, args) retmsg = { "name": name } retcode = 200 except psycopg2.IntegrityError as e: retmsg = { "message": "Failed to update entry {}".format(name), "error": e } retcode = 400 close_database(conn, cur) return flask.jsonify(retmsg), retcode def delete_script(name): if not list_script(name, is_fuzzy=False): retmsg = { "message": "The script {} does not exist".format(name) } retcode = 400 return flask.jsonify(retmsg), retcode conn, cur = open_database(config) try: query = "DELETE FROM script WHERE name = %s;" args = (name,) cur.execute(query, args) retmsg = { "name": name } retcode = 200 except psycopg2.IntegrityError as e: retmsg = { "message": "Failed to delete entry {}".format(name), "error": str(e) } retcode = 400 close_database(conn, cur) return flask.jsonify(retmsg), retcode # # Profile functions # def list_profile(limit, is_fuzzy=True): if limit: if is_fuzzy: # Handle fuzzy vs. non-fuzzy limits if not re.match('\^.*', limit): limit = '%' + limit else: limit = limit[1:] if not re.match('.*\$', limit): limit = limit + '%' else: limit = limit[:-1] query = "SELECT * FROM {} WHERE name LIKE %s;".format('profile') args = (limit, ) else: query = "SELECT * FROM {};".format('profile') args = () conn, cur = open_database(config) cur.execute(query, args) orig_data = cur.fetchall() data = list() for profile in orig_data: profile_data = dict() profile_data['name'] = profile['name'] # Parse the name of each subelement for etype in 'system_template', 'network_template', 'storage_template', 'userdata_template', 'script': query = 'SELECT name from {} WHERE id = %s'.format(etype) args = (profile[etype],) cur.execute(query, args) name = cur.fetchone()['name'] profile_data[etype] = name # Split the arguments back into a list profile_data['arguments'] = profile['arguments'].split('|') # Append the new data to our actual output structure data.append(profile_data) close_database(conn, cur) return data def create_profile(name, system_template, network_template, storage_template, userdata_template, script, arguments=[]): if list_profile(name, is_fuzzy=False): retmsg = { "message": "The profile {} already exists".format(name) } retcode = 400 return flask.jsonify(retmsg), retcode system_templates = list_template_system(None) system_template_id = None for template in system_templates: if template['name'] == system_template: system_template_id = template['id'] if not system_template_id: retmsg = { "message": "The system template {} for profile {} does not exist".format(system_template, name) } retcode = 400 return flask.jsonify(retmsg), retcode network_templates = list_template_network(None) network_template_id = None for template in network_templates: if template['name'] == network_template: network_template_id = template['id'] if not network_template_id: retmsg = { "message": "The network template {} for profile {} does not exist".format(network_template, name) } retcode = 400 return flask.jsonify(retmsg), retcode storage_templates = list_template_storage(None) storage_template_id = None for template in storage_templates: if template['name'] == storage_template: storage_template_id = template['id'] if not storage_template_id: retmsg = { "message": "The storage template {} for profile {} does not exist".format(storage_template, name) } retcode = 400 return flask.jsonify(retmsg), retcode userdata_templates = list_template_userdata(None) userdata_template_id = None for template in userdata_templates: if template['name'] == userdata_template: userdata_template_id = template['id'] if not userdata_template_id: retmsg = { "message": "The userdata template {} for profile {} does not exist".format(userdata_template, name) } retcode = 400 return flask.jsonify(retmsg), retcode scripts = list_script(None) script_id = None for scr in scripts: if scr['name'] == script: script_id = scr['id'] if not script_id: retmsg = { "message": "The script {} for profile {} does not exist".format(script, name) } retcode = 400 return flask.jsonify(retmsg), retcode arguments_formatted = '|'.join(arguments) conn, cur = open_database(config) try: query = "INSERT INTO profile (name, system_template, network_template, storage_template, userdata_template, script, arguments) VALUES (%s, %s, %s, %s, %s, %s, %s);" args = (name, system_template_id, network_template_id, storage_template_id, userdata_template_id, script_id, arguments_formatted) cur.execute(query, args) retmsg = { "name": name } retcode = 200 except psycopg2.IntegrityError as e: retmsg = { "message": "Failed to create entry {}".format(name), "error": e } retcode = 400 close_database(conn, cur) return flask.jsonify(retmsg), retcode def delete_profile(name): if not list_profile(name, is_fuzzy=False): retmsg = { "message": "The profile {} does not exist".format(name) } retcode = 400 return flask.jsonify(retmsg), retcode conn, cur = open_database(config) try: query = "DELETE FROM profile WHERE name = %s;" args = (name,) cur.execute(query, args) retmsg = { "name": name } retcode = 200 except psycopg2.IntegrityError as e: retmsg = { "message": "Failed to delete entry {}".format(name), "error": e } retcode = 400 close_database(conn, cur) return flask.jsonify(retmsg), retcode # # VM provisioning helper functions # def run_os_command(command_string, background=False, environment=None, timeout=None): command = shlex.split(command_string) try: command_output = subprocess.run( command, env=environment, timeout=timeout, stdout=subprocess.PIPE, stderr=subprocess.PIPE, ) retcode = command_output.returncode except subprocess.TimeoutExpired: retcode = 128 try: stdout = command_output.stdout.decode('ascii') except: stdout = '' try: stderr = command_output.stderr.decode('ascii') except: stderr = '' return retcode, stdout, stderr # # Cloned VM provisioning function - executed by the Celery worker # def clone_vm(self, vm_name, vm_profile, source_volumes): pass # # Main VM provisioning function - executed by the Celery worker # def create_vm(self, vm_name, vm_profile, define_vm=True, start_vm=True): # Runtime imports import time import importlib import uuid import datetime import random time.sleep(2) print("Starting provisioning of VM '{}' with profile '{}'".format(vm_name, vm_profile)) # Phase 0 - connect to databases try: db_conn, db_cur = open_database(config) except: print('FATAL - failed to connect to Postgres') raise Exception try: zk_conn = pvc_common.startZKConnection(config['coordinators']) except: print('FATAL - failed to connect to Zookeeper') raise Exception # Phase 1 - setup # * Get the profile elements # * Get the details from these elements # * Assemble a VM configuration dictionary self.update_state(state='RUNNING', meta={'current': 1, 'total': 10, 'status': 'Collecting configuration'}) time.sleep(1) vm_id = re.findall(r'/(\d+)$/', vm_name) if not vm_id: vm_id = 0 else: vm_id = vm_id[0] vm_data = dict() # Get the profile information query = "SELECT system_template, network_template, storage_template, script, arguments FROM profile WHERE name = %s" args = (vm_profile,) db_cur.execute(query, args) profile_data = db_cur.fetchone() vm_data['script_arguments'] = profile_data['arguments'].split('|') # Get the system details query = 'SELECT vcpu_count, vram_mb, serial, vnc, vnc_bind, node_limit, node_selector, start_with_node FROM system_template WHERE id = %s' args = (profile_data['system_template'],) db_cur.execute(query, args) vm_data['system_details'] = db_cur.fetchone() # Get the MAC template query = 'SELECT mac_template FROM network_template WHERE id = %s' args = (profile_data['network_template'],) db_cur.execute(query, args) vm_data['mac_template'] = db_cur.fetchone()['mac_template'] # Get the networks query = 'SELECT vni FROM network WHERE network_template = %s' args = (profile_data['network_template'],) db_cur.execute(query, args) vm_data['networks'] = db_cur.fetchall() # Get the storage volumes query = 'SELECT pool, disk_id, disk_size_gb, mountpoint, filesystem, filesystem_args FROM storage WHERE storage_template = %s' args = (profile_data['storage_template'],) db_cur.execute(query, args) vm_data['volumes'] = db_cur.fetchall() # Get the script query = 'SELECT script FROM script WHERE id = %s' args = (profile_data['script'],) db_cur.execute(query, args) vm_data['script'] = db_cur.fetchone()['script'] close_database(db_conn, db_cur) print("VM configuration data:\n{}".format(json.dumps(vm_data, sort_keys=True, indent=2))) # Phase 2 - verification # * Ensure that at least one node has enough free RAM to hold the VM (becomes main host) # * Ensure that all networks are valid # * Ensure that there is enough disk space in the Ceph cluster for the disks # This is the "safe fail" step when an invalid configuration will be caught self.update_state(state='RUNNING', meta={'current': 2, 'total': 10, 'status': 'Verifying configuration against cluster'}) time.sleep(1) # Verify that a VM with this name does not already exist if pvc_vm.searchClusterByName(zk_conn, vm_name): raise ClusterError("A VM with the name '{}' already exists in the cluster".format(vm_name)) # Verify that at least one host has enough free RAM to run the VM _discard, nodes = pvc_node.get_list(zk_conn, None) target_node = None last_free = 0 for node in nodes: # Skip the node if it is not ready to run VMs if node ['daemon_state'] != "run" or node['domain_state'] != "ready": continue # Skip the node if its free memory is less than the new VM's size, plus a 512MB buffer if node['memory']['free'] < (vm_data['system_details']['vram_mb'] + 512): continue # If this node has the most free, use it if node['memory']['free'] > last_free: last_free = node['memory']['free'] target_node = node['name'] # Raise if no node was found if not target_node: raise ClusterError("No ready cluster node contains at least {}+512 MB of free RAM".format(vm_data['system_details']['vram_mb'])) print("Selecting target node {} with {} MB free RAM".format(target_node, last_free)) # Verify that all configured networks are present on the cluster cluster_networks, _discard = pvc_network.getClusterNetworkList(zk_conn) for network in vm_data['networks']: vni = str(network['vni']) if not vni in cluster_networks: raise ClusterError("The network VNI {} is not present on the cluster".format(vni)) print("All configured networks for VM are valid") # Verify that there is enough disk space free to provision all VM disks pools = dict() for volume in vm_data['volumes']: if not volume['pool'] in pools: pools[volume['pool']] = volume['disk_size_gb'] else: pools[volume['pool']] += volume['disk_size_gb'] for pool in pools: pool_information = pvc_ceph.getPoolInformation(zk_conn, pool) if not pool_information: raise ClusterError("Pool {} is not present on the cluster".format(pool)) pool_free_space_gb = int(pool_information['stats']['free_bytes'] / 1024 / 1024 / 1024) pool_vm_usage_gb = int(pools[pool]) if pool_vm_usage_gb >= pool_free_space_gb: raise ClusterError("Pool {} has only {} GB free and VM requires {} GB".format(pool, pool_free_space_gb, pool_vm_usage_gb)) print("There is enough space on cluster to store VM volumes") # Verify that every specified filesystem is valid used_filesystems = list() for volume in vm_data['volumes']: if volume['filesystem'] and volume['filesystem'] not in used_filesystems: used_filesystems.append(volume['filesystem']) for filesystem in used_filesystems: retcode, stdout, stderr = run_os_command("which mkfs.{}".format(filesystem)) if retcode: raise ProvisioningError("Failed to find binary for mkfs.{}: {}".format(filesystem, stderr)) print("All selected filesystems are valid") # Phase 3 - provisioning script preparation # * Import the provisioning script as a library with importlib # * Ensure the required function(s) are present self.update_state(state='RUNNING', meta={'current': 3, 'total': 10, 'status': 'Preparing provisioning script'}) time.sleep(1) # Write the script out to a temporary file retcode, stdout, stderr = run_os_command("mktemp") if retcode: raise ProvisioningError("Failed to create a temporary file: {}".format(stderr)) script_file = stdout.strip() with open(script_file, 'w') as fh: fh.write(vm_data['script']) fh.write('\n') # Import the script file loader = importlib.machinery.SourceFileLoader('installer_script', script_file) spec = importlib.util.spec_from_loader(loader.name, loader) installer_script = importlib.util.module_from_spec(spec) loader.exec_module(installer_script) # Verify that the install() function is valid if not "install" in dir(installer_script): raise ProvisioningError("Specified script does not contain an install() function") print("Provisioning script imported successfully") # Phase 4 - disk creation # * Create each Ceph storage volume for the disks self.update_state(state='RUNNING', meta={'current': 4, 'total': 10, 'status': 'Creating storage volumes'}) time.sleep(1) for volume in vm_data['volumes']: success, message = pvc_ceph.add_volume(zk_conn, volume['pool'], "{}_{}".format(vm_name, volume['disk_id']), "{}G".format(volume['disk_size_gb'])) print(message) if not success: raise ClusterError("Failed to create volume {}".format(volume['disk_id'])) # Phase 5 - disk mapping # * Map each volume to the local host in order # * Format each volume with any specified filesystems # * If any mountpoints are specified, create a temporary mount directory # * Mount any volumes to their respective mountpoints self.update_state(state='RUNNING', meta={'current': 5, 'total': 10, 'status': 'Mapping, formatting, and mounting storage volumes locally'}) time.sleep(1) for volume in reversed(vm_data['volumes']): if not volume['filesystem']: continue rbd_volume = "{}/{}_{}".format(volume['pool'], vm_name, volume['disk_id']) filesystem_args_list = list() for arg in volume['filesystem_args'].split(' '): arg_entry, arg_data = arg.split('=') filesystem_args_list.append(arg_entry) filesystem_args_list.append(arg_data) filesystem_args = ' '.join(filesystem_args_list) # Map the RBD device retcode, stdout, stderr = run_os_command("rbd map {}".format(rbd_volume)) if retcode: raise ProvisioningError("Failed to map volume {}: {}".format(rbd_volume, stderr)) # Create the filesystem retcode, stdout, stderr = run_os_command("mkfs.{} {} /dev/rbd/{}".format(volume['filesystem'], filesystem_args, rbd_volume)) if retcode: raise ProvisioningError("Failed to create {} filesystem on {}: {}".format(volume['filesystem'], rbd_volume, stderr)) print("Created {} filesystem on {}:\n{}".format(volume['filesystem'], rbd_volume, stdout)) # Create temporary directory retcode, stdout, stderr = run_os_command("mktemp -d") if retcode: raise ProvisioningError("Failed to create a temporary directory: {}".format(stderr)) temp_dir = stdout.strip() for volume in vm_data['volumes']: if not volume['mountpoint']: continue mapped_rbd_volume = "/dev/rbd/{}/{}_{}".format(volume['pool'], vm_name, volume['disk_id']) mount_path = "{}{}".format(temp_dir, volume['mountpoint']) # Ensure the mount path exists (within the filesystems) retcode, stdout, stderr = run_os_command("mkdir -p {}".format(mount_path)) if retcode: raise ProvisioningError("Failed to create mountpoint {}: {}".format(mount_path, stderr)) # Mount filesystems to temporary directory retcode, stdout, stderr = run_os_command("mount {} {}".format(mapped_rbd_volume, mount_path)) if retcode: raise ProvisioningError("Failed to mount {} on {}: {}".format(mapped_rbd_volume, mount_path, stderr)) print("Successfully mounted {} on {}".format(mapped_rbd_volume, mount_path)) # Phase 6 - provisioning script execution # * Execute the provisioning script main function ("install") passing any custom arguments self.update_state(state='RUNNING', meta={'current': 6, 'total': 10, 'status': 'Executing provisioning script'}) time.sleep(1) print("Running installer script") # Parse the script arguments script_arguments = dict() for argument in vm_data['script_arguments']: argument_name, argument_data = argument.split('=') script_arguments[argument_name] = argument_data # Run the script installer_script.install( vm_name=vm_name, vm_id=vm_id, temporary_directory=temp_dir, disks=vm_data['volumes'], networks=vm_data['networks'], **script_arguments ) # Phase 7 - install cleanup # * Unmount any mounted volumes # * Remove any temporary directories self.update_state(state='RUNNING', meta={'current': 7, 'total': 10, 'status': 'Cleaning up local mounts and directories'}) time.sleep(1) for volume in list(reversed(vm_data['volumes'])): # Unmount the volume if volume['mountpoint']: print("Cleaning up mount {}{}".format(temp_dir, volume['mountpoint'])) mount_path = "{}{}".format(temp_dir, volume['mountpoint']) retcode, stdout, stderr = run_os_command("umount {}".format(mount_path)) if retcode: raise ProvisioningError("Failed to unmount {}: {}".format(mount_path, stderr)) # Unmap the RBD device if volume['filesystem']: print("Cleaning up RBD mapping /dev/rbd/{}/{}_{}".format(volume['pool'], vm_name, volume['disk_id'])) rbd_volume = "/dev/rbd/{}/{}_{}".format(volume['pool'], vm_name, volume['disk_id']) retcode, stdout, stderr = run_os_command("rbd unmap {}".format(rbd_volume)) if retcode: raise ProvisioningError("Failed to unmap volume {}: {}".format(rbd_volume, stderr)) print("Cleaning up temporary directories and files") # Remove temporary mount directory (don't fail if not removed) retcode, stdout, stderr = run_os_command("rmdir {}".format(temp_dir)) if retcode: print("Failed to delete temporary directory {}: {}".format(temp_dir, stderr)) # Remote temporary script (don't fail if not removed) retcode, stdout, stderr = run_os_command("rm -f {}".format(script_file)) if retcode: print("Failed to delete temporary script file {}: {}".format(script_file, stderr)) # Phase 8 - configuration creation # * Create the libvirt XML configuration self.update_state(state='RUNNING', meta={'current': 8, 'total': 10, 'status': 'Preparing Libvirt XML configuration'}) time.sleep(1) print("Creating Libvirt configuration") # Get information about VM vm_uuid = uuid.uuid4() vm_description = "PVC provisioner @ {}, profile '{}'".format(datetime.datetime.now(), vm_profile) retcode, stdout, stderr = run_os_command("uname -m") system_architecture = stdout.strip() # Begin assembling libvirt schema vm_schema = "" vm_schema += libvirt_schema.libvirt_header.format( vm_name=vm_name, vm_uuid=vm_uuid, vm_description=vm_description, vm_memory=vm_data['system_details']['vram_mb'], vm_vcpus=vm_data['system_details']['vcpu_count'], vm_architecture=system_architecture ) # Add network devices network_id = 0 for network in vm_data['networks']: vni = network['vni'] eth_bridge = "vmbr{}".format(vni) vm_id_hex = '{:x}'.format(int(vm_id % 16)) net_id_hex = '{:x}'.format(int(network_id % 16)) mac_prefix = '52:54:00' if vm_data['mac_template']: mactemplate = "{prefix}:ff:f6:{vmid}{netid}" macgen_template = vm_data['mac_template'] eth_macaddr = macgen_template.format( prefix=mac_prefix, vmid=vm_id_hex, netid=net_id_hex, ) else: random_octet_A = '{:x}'.format(random.randint(16,238)) random_octet_B = '{:x}'.format(random.randint(16,238)) random_octet_C = '{:x}'.format(random.randint(16,238)) macgen_template = '{prefix}:{octetA}:{octetB}:{octetC}' eth_macaddr = macgen_template.format( prefix=mac_prefix, octetA=random_octet_A, octetB=random_octet_B, octetC=random_octet_C ) vm_schema += libvirt_schema.devices_net_interface.format( eth_macaddr=eth_macaddr, eth_bridge=eth_bridge ) network_id += 1 # Add disk devices monitor_list = list() coordinator_names = config['storage_hosts'] for coordinator in coordinator_names: monitor_list.append("{}.{}".format(coordinator, config['storage_domain'])) ceph_storage_secret = config['ceph_storage_secret_uuid'] for volume in vm_data['volumes']: vm_schema += libvirt_schema.devices_disk_header.format( ceph_storage_secret=ceph_storage_secret, disk_pool=volume['pool'], vm_name=vm_name, disk_id=volume['disk_id'] ) for monitor in monitor_list: vm_schema += libvirt_schema.devices_disk_coordinator.format( coordinator_name=monitor, coordinator_ceph_mon_port=config['ceph_monitor_port'] ) vm_schema += libvirt_schema.devices_disk_footer vm_schema += libvirt_schema.devices_vhostmd # Add default devices vm_schema += libvirt_schema.devices_default # Add serial device if vm_data['system_details']['serial']: vm_schema += libvirt_schema.devices_serial.format( vm_name=vm_name ) # Add VNC device if vm_data['system_details']['vnc']: if vm_data['system_details']['vnc_bind']: vm_vnc_bind = vm_data['system_details']['vnc_bind'] else: vm_vnc_bind = "127.0.0.1" vm_vncport = 5900 vm_vnc_autoport = "yes" vm_schema += libvirt_schema.devices_vnc.format( vm_vncport=vm_vncport, vm_vnc_autoport=vm_vnc_autoport, vm_vnc_bind=vm_vnc_bind ) # Add SCSI controller vm_schema += libvirt_schema.devices_scsi_controller # Add footer vm_schema += libvirt_schema.libvirt_footer print("Final VM schema:\n{}\n".format(vm_schema)) # Phase 9 - definition # * Create the VM in the PVC cluster # * Start the VM in the PVC cluster self.update_state(state='RUNNING', meta={'current': 9, 'total': 10, 'status': 'Defining and starting VM on the cluster'}) time.sleep(1) if start_vm and not define_vm: start_vm = False if define_vm or start_vm: print("Defining and starting VM on cluster") if define_vm: retcode, retmsg = pvc_vm.define_vm(zk_conn, vm_schema, target_node, vm_data['system_details']['node_limit'].split(','), vm_data['system_details']['node_selector'], vm_data['system_details']['start_with_node'], vm_profile) print(retmsg) if start_vm: retcode, retmsg = pvc_vm.start_vm(zk_conn, vm_name) print(retmsg) pvc_common.stopZKConnection(zk_conn) return {"status": "VM '{}' with profile '{}' has been provisioned and started successfully".format(vm_name, vm_profile), "current": 10, "total": 10}