86 lines
2.9 KiB
Python
86 lines
2.9 KiB
Python
import json
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import uncloud.secrets as secrets
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from django.core.management.base import BaseCommand
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from django.contrib.auth import get_user_model
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from uncloud_vm.models import VMProduct, VMHost
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class Command(BaseCommand):
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help = 'Select VM Host for VMs'
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def add_arguments(self, parser):
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parser.add_argument('--schedule-vms', action='store_true')
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parser.add_argument('--start-vms-here', action='store_true')
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parser.add_argument('--check-health', action='store_true')
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parser.add_argument('--vmhostname')
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print(parser)
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def handle(self, *args, **options):
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print(args)
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print(options)
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if options['schedule_vms']:
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self.schedule_vms(args, option)
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if options['start_vms_here']:
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if not options['vmhostname']:
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raise Exception("Argument vmhostname is required to know which vmhost we are on")
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self.start_vms(args, options)
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if options['check_health']:
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self.check_health(args, option)
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def start_vms(self, *args, **options):
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vmhost = VMHost.objects.get(status='active',
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hostname=options['vmhostname'])
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if not vmhost:
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print("No active vmhost {} exists".format(options['vmhostname']))
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return
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vms_to_start = VMProduct.objects.filter(vmhost=vmhost,
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status='creating')
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for vm in vms_to_start:
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""" run qemu:
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check if VM is not already active / qemu running
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prepare / create the Qemu arguments
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"""
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def schedule_vms(self, *args, **options)):
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pending_vms = VMProduct.objects.filter(vmhost__isnull=True)
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vmhosts = VMHost.objects.filter(status='active')
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for vm in pending_vms:
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print(vm)
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found_vmhost = False
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for vmhost in vmhosts:
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if vmhost.available_cores >= vm.cores and vmhost.available_ram_in_gb >= vm.ram_in_gb:
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vm.vmhost = vmhost
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vm.status = "creating"
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vm.save()
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found_vmhost = True
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print("Scheduled VM {} on VMHOST {}".format(vm, vmhost))
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break
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if not found_vmhost:
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print("Error: cannot schedule VM {}, no suitable host found".format(vm))
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def check_health(self, *args, **options):
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pending_vms = VMProduct.objects.filter(vmhost__isnull=True)
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vmhosts = VMHost.objects.filter(status='active')
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# 1. Check that all active hosts reported back N seconds ago
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# 2. Check that no VM is running on a dead host
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# 3. Migrate VMs if necessary
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# 4. Check that no VMs have been pending for longer than Y seconds
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# If VM snapshots exist without a VM -> notify user (?)
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print("Nothing is good, you should implement me")
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