Move all host provisioner steps to a try block
Make the provisioner a bit more robust. This way, even if a provisioning step fails, cleanup is still performed this preventing the system from being left in an undefined state requiring manual correction. Addresses #91
This commit is contained in:
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ccee124c8b
commit
5526e13da9
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@ -1388,232 +1388,244 @@ def create_vm(self, vm_name, vm_profile, define_vm=True, start_vm=True, script_r
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vm_schema += libvirt_schema.libvirt_footer
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print("Final VM schema:\n{}\n".format(vm_schema))
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# Phase 5 - definition
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# * Create the VM in the PVC cluster
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self.update_state(state='RUNNING', meta={'current': 5, 'total': 10, 'status': 'Defining VM on the cluster'})
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time.sleep(1)
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if define_vm:
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print("Defining VM on cluster")
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node_limit = vm_data['system_details']['node_limit']
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if node_limit:
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node_limit = node_limit.split(',')
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node_selector = vm_data['system_details']['node_selector']
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node_autostart = vm_data['system_details']['node_autostart']
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retcode, retmsg = pvc_vm.define_vm(zk_conn, vm_schema.strip(), target_node, node_limit, node_selector, node_autostart, vm_profile, initial_state='provision')
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print(retmsg)
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else:
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print("Skipping VM definition")
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# All the following steps may require cleanup later on, so catch them here and do cleanup in a Finally block
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try:
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# Phase 5 - definition
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# * Create the VM in the PVC cluster
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self.update_state(state='RUNNING', meta={'current': 5, 'total': 10, 'status': 'Defining VM on the cluster'})
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time.sleep(1)
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# Phase 6 - disk creation
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# * Create each Ceph storage volume for the disks
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self.update_state(state='RUNNING', meta={'current': 6, 'total': 10, 'status': 'Creating storage volumes'})
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time.sleep(1)
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for volume in vm_data['volumes']:
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if volume.get('source_volume') is not None:
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success, message = pvc_ceph.clone_volume(zk_conn, volume['pool'], "{}_{}".format(vm_name, volume['disk_id']), volume['source_volume'])
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print(message)
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if not success:
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raise ClusterError('Failed to clone volume "{}" to "{}".'.format(volume['source_volume'], volume['disk_id']))
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if define_vm:
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print("Defining VM on cluster")
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node_limit = vm_data['system_details']['node_limit']
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if node_limit:
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node_limit = node_limit.split(',')
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node_selector = vm_data['system_details']['node_selector']
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node_autostart = vm_data['system_details']['node_autostart']
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retcode, retmsg = pvc_vm.define_vm(zk_conn, vm_schema.strip(), target_node, node_limit, node_selector, node_autostart, vm_profile, initial_state='provision')
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print(retmsg)
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else:
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success, message = pvc_ceph.add_volume(zk_conn, volume['pool'], "{}_{}".format(vm_name, volume['disk_id']), "{}G".format(volume['disk_size_gb']))
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print(message)
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if not success:
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raise ClusterError('Failed to create volume "{}".'.format(volume['disk_id']))
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print("Skipping VM definition")
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# Phase 7 - disk mapping
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# * Map each volume to the local host in order
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# * Format each volume with any specified filesystems
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# * If any mountpoints are specified, create a temporary mount directory
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# * Mount any volumes to their respective mountpoints
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self.update_state(state='RUNNING', meta={'current': 7, 'total': 10, 'status': 'Mapping, formatting, and mounting storage volumes locally'})
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time.sleep(1)
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for volume in vm_data['volumes']:
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dst_volume_name = "{}_{}".format(vm_name, volume['disk_id'])
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dst_volume = "{}/{}".format(volume['pool'], dst_volume_name)
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if is_ova_install:
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src_volume_name = volume['volume_name']
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src_volume = "{}/{}".format(volume['pool'], src_volume_name)
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print('Converting {} source volume {} to raw format on {}'.format(volume['volume_format'], src_volume, dst_volume))
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# Map the target RBD device
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retcode, retmsg = pvc_ceph.map_volume(zk_conn, volume['pool'], dst_volume_name)
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if not retcode:
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raise ProvisioningError('Failed to map destination volume "{}": {}'.format(dst_volume_name, retmsg))
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# Map the source RBD device
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retcode, retmsg = pvc_ceph.map_volume(zk_conn, volume['pool'], src_volume_name)
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if not retcode:
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raise ProvisioningError('Failed to map source volume "{}": {}'.format(src_volume_name, retmsg))
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# Convert from source to target
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retcode, stdout, stderr = pvc_common.run_os_command(
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'qemu-img convert -C -f {} -O raw {} {}'.format(
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volume['volume_format'],
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"/dev/rbd/{}".format(src_volume),
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"/dev/rbd/{}".format(dst_volume)
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)
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)
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if retcode:
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raise ProvisioningError('Failed to convert {} volume "{}" to raw volume "{}": {}'.format(volume['volume_format'], src_volume, dst_volume, stderr))
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# Unmap the source RBD device (don't bother later)
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retcode, retmsg = pvc_ceph.unmap_volume(zk_conn, volume['pool'], src_volume_name)
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if not retcode:
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raise ProvisioningError('Failed to unmap source volume "{}": {}'.format(src_volume_name, retmsg))
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# Unmap the target RBD device (don't bother later)
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retcode, retmsg = pvc_ceph.unmap_volume(zk_conn, volume['pool'], dst_volume_name)
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if not retcode:
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raise ProvisioningError('Failed to unmap destination volume "{}": {}'.format(dst_volume_name, retmsg))
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else:
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# Phase 6 - disk creation
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# * Create each Ceph storage volume for the disks
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self.update_state(state='RUNNING', meta={'current': 6, 'total': 10, 'status': 'Creating storage volumes'})
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time.sleep(1)
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for volume in vm_data['volumes']:
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if volume.get('source_volume') is not None:
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continue
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if volume.get('filesystem') is None:
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continue
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print("Creating {} filesystem on {}:\n{}".format(volume['filesystem'], dst_volume, stdout))
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filesystem_args_list = list()
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for arg in volume['filesystem_args'].split():
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arg_entry, arg_data = arg.split('=')
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filesystem_args_list.append(arg_entry)
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filesystem_args_list.append(arg_data)
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filesystem_args = ' '.join(filesystem_args_list)
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# Map the RBD device
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retcode, retmsg = pvc_ceph.map_volume(zk_conn, volume['pool'], dst_volume_name)
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if not retcode:
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raise ProvisioningError('Failed to map volume "{}": {}'.format(dst_volume, retmsg))
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# Create the filesystem
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if volume['filesystem'] == 'swap':
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retcode, stdout, stderr = pvc_common.run_os_command("mkswap -f /dev/rbd/{}".format(dst_volume))
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if retcode:
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raise ProvisioningError('Failed to create swap on "{}": {}'.format(dst_volume, stderr))
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success, message = pvc_ceph.clone_volume(zk_conn, volume['pool'], "{}_{}".format(vm_name, volume['disk_id']), volume['source_volume'])
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print(message)
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if not success:
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raise ProvisioningError('Failed to clone volume "{}" to "{}".'.format(volume['source_volume'], volume['disk_id']))
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else:
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retcode, stdout, stderr = pvc_common.run_os_command("mkfs.{} {} /dev/rbd/{}".format(volume['filesystem'], filesystem_args, dst_volume))
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if retcode:
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raise ProvisioningError('Failed to create {} filesystem on "{}": {}'.format(volume['filesystem'], dst_volume, stderr))
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success, message = pvc_ceph.add_volume(zk_conn, volume['pool'], "{}_{}".format(vm_name, volume['disk_id']), "{}G".format(volume['disk_size_gb']))
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print(message)
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if not success:
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raise ProvisioningError('Failed to create volume "{}".'.format(volume['disk_id']))
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if is_script_install:
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# Create temporary directory
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retcode, stdout, stderr = pvc_common.run_os_command("mktemp -d")
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if retcode:
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raise ProvisioningError("Failed to create a temporary directory: {}".format(stderr))
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temp_dir = stdout.strip()
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# Phase 7 - disk mapping
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# * Map each volume to the local host in order
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# * Format each volume with any specified filesystems
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# * If any mountpoints are specified, create a temporary mount directory
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# * Mount any volumes to their respective mountpoints
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self.update_state(state='RUNNING', meta={'current': 7, 'total': 10, 'status': 'Mapping, formatting, and mounting storage volumes locally'})
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time.sleep(1)
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for volume in vm_data['volumes']:
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if volume['source_volume'] is not None:
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continue
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dst_volume_name = "{}_{}".format(vm_name, volume['disk_id'])
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dst_volume = "{}/{}".format(volume['pool'], dst_volume_name)
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if not volume['mountpoint'] or volume['mountpoint'] == 'swap':
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continue
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if is_ova_install:
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src_volume_name = volume['volume_name']
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src_volume = "{}/{}".format(volume['pool'], src_volume_name)
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mapped_dst_volume = "/dev/rbd/{}/{}_{}".format(volume['pool'], vm_name, volume['disk_id'])
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mount_path = "{}{}".format(temp_dir, volume['mountpoint'])
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print('Converting {} source volume {} to raw format on {}'.format(volume['volume_format'], src_volume, dst_volume))
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# Ensure the mount path exists (within the filesystems)
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retcode, stdout, stderr = pvc_common.run_os_command("mkdir -p {}".format(mount_path))
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# Map the target RBD device
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retcode, retmsg = pvc_ceph.map_volume(zk_conn, volume['pool'], dst_volume_name)
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if not retcode:
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raise ProvisioningError('Failed to map destination volume "{}": {}'.format(dst_volume_name, retmsg))
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# Map the source RBD device
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retcode, retmsg = pvc_ceph.map_volume(zk_conn, volume['pool'], src_volume_name)
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if not retcode:
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raise ProvisioningError('Failed to map source volume "{}": {}'.format(src_volume_name, retmsg))
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# Convert from source to target
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retcode, stdout, stderr = pvc_common.run_os_command(
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'qemu-img convert -C -f {} -O raw {} {}'.format(
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volume['volume_format'],
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"/dev/rbd/{}".format(src_volume),
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"/dev/rbd/{}".format(dst_volume)
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)
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)
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if retcode:
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raise ProvisioningError('Failed to convert {} volume "{}" to raw volume "{}": {}'.format(volume['volume_format'], src_volume, dst_volume, stderr))
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# Unmap the source RBD device (don't bother later)
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retcode, retmsg = pvc_ceph.unmap_volume(zk_conn, volume['pool'], src_volume_name)
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if not retcode:
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raise ProvisioningError('Failed to unmap source volume "{}": {}'.format(src_volume_name, retmsg))
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# Unmap the target RBD device (don't bother later)
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retcode, retmsg = pvc_ceph.unmap_volume(zk_conn, volume['pool'], dst_volume_name)
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if not retcode:
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raise ProvisioningError('Failed to unmap destination volume "{}": {}'.format(dst_volume_name, retmsg))
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else:
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if volume.get('source_volume') is not None:
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continue
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if volume.get('filesystem') is None:
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continue
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print("Creating {} filesystem on {}:\n{}".format(volume['filesystem'], dst_volume, stdout))
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filesystem_args_list = list()
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for arg in volume['filesystem_args'].split():
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arg_entry, arg_data = arg.split('=')
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filesystem_args_list.append(arg_entry)
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filesystem_args_list.append(arg_data)
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filesystem_args = ' '.join(filesystem_args_list)
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# Map the RBD device
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retcode, retmsg = pvc_ceph.map_volume(zk_conn, volume['pool'], dst_volume_name)
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if not retcode:
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raise ProvisioningError('Failed to map volume "{}": {}'.format(dst_volume, retmsg))
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# Create the filesystem
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if volume['filesystem'] == 'swap':
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retcode, stdout, stderr = pvc_common.run_os_command("mkswap -f /dev/rbd/{}".format(dst_volume))
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if retcode:
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raise ProvisioningError('Failed to create swap on "{}": {}'.format(dst_volume, stderr))
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else:
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retcode, stdout, stderr = pvc_common.run_os_command("mkfs.{} {} /dev/rbd/{}".format(volume['filesystem'], filesystem_args, dst_volume))
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if retcode:
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raise ProvisioningError('Failed to create {} filesystem on "{}": {}'.format(volume['filesystem'], dst_volume, stderr))
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if is_script_install:
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# Create temporary directory
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retcode, stdout, stderr = pvc_common.run_os_command("mktemp -d")
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if retcode:
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raise ProvisioningError('Failed to create mountpoint "{}": {}'.format(mount_path, stderr))
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raise ProvisioningError("Failed to create a temporary directory: {}".format(stderr))
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temp_dir = stdout.strip()
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# Mount filesystems to temporary directory
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retcode, stdout, stderr = pvc_common.run_os_command("mount {} {}".format(mapped_dst_volume, mount_path))
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if retcode:
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raise ProvisioningError('Failed to mount "{}" on "{}": {}'.format(mapped_dst_volume, mount_path, stderr))
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for volume in vm_data['volumes']:
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if volume['source_volume'] is not None:
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continue
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print("Successfully mounted {} on {}".format(mapped_dst_volume, mount_path))
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if not volume['mountpoint'] or volume['mountpoint'] == 'swap':
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continue
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# Phase 8 - provisioning script execution
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# * Execute the provisioning script main function ("install") passing any custom arguments
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self.update_state(state='RUNNING', meta={'current': 8, 'total': 10, 'status': 'Executing provisioning script'})
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time.sleep(1)
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mapped_dst_volume = "/dev/rbd/{}/{}_{}".format(volume['pool'], vm_name, volume['disk_id'])
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mount_path = "{}{}".format(temp_dir, volume['mountpoint'])
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if is_script_install:
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print("Running installer script")
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# Ensure the mount path exists (within the filesystems)
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retcode, stdout, stderr = pvc_common.run_os_command("mkdir -p {}".format(mount_path))
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if retcode:
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raise ProvisioningError('Failed to create mountpoint "{}": {}'.format(mount_path, stderr))
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# Parse the script arguments
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script_arguments = dict()
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for argument in vm_data['script_arguments']:
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argument_name, argument_data = argument.split('=')
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script_arguments[argument_name] = argument_data
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# Mount filesystems to temporary directory
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retcode, stdout, stderr = pvc_common.run_os_command("mount {} {}".format(mapped_dst_volume, mount_path))
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if retcode:
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raise ProvisioningError('Failed to mount "{}" on "{}": {}'.format(mapped_dst_volume, mount_path, stderr))
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# Parse the runtime arguments
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if script_run_args is not None:
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for argument in script_run_args:
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print("Successfully mounted {} on {}".format(mapped_dst_volume, mount_path))
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# Phase 8 - provisioning script execution
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# * Execute the provisioning script main function ("install") passing any custom arguments
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self.update_state(state='RUNNING', meta={'current': 8, 'total': 10, 'status': 'Executing provisioning script'})
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time.sleep(1)
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if is_script_install:
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print("Running installer script")
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# Parse the script arguments
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script_arguments = dict()
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for argument in vm_data['script_arguments']:
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argument_name, argument_data = argument.split('=')
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script_arguments[argument_name] = argument_data
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print("Script arguments: {}".format(script_arguments))
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# Parse the runtime arguments
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if script_run_args is not None:
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for argument in script_run_args:
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argument_name, argument_data = argument.split('=')
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script_arguments[argument_name] = argument_data
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# Run the script
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try:
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installer_script.install(
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vm_name=vm_name,
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vm_id=vm_id,
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temporary_directory=temp_dir,
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disks=vm_data['volumes'],
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networks=vm_data['networks'],
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**script_arguments
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)
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except:
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pass
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print("Script arguments: {}".format(script_arguments))
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# Phase 9 - install cleanup
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# * Unmount any mounted volumes
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# * Remove any temporary directories
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self.update_state(state='RUNNING', meta={'current': 9, 'total': 10, 'status': 'Cleaning up local mounts and directories'})
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time.sleep(1)
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# Run the script
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try:
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installer_script.install(
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vm_name=vm_name,
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vm_id=vm_id,
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temporary_directory=temp_dir,
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disks=vm_data['volumes'],
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networks=vm_data['networks'],
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**script_arguments
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)
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except Exception as e:
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raise ProvisioningError('Failed to run install script: {}'.format(e))
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if not is_ova_install:
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for volume in list(reversed(vm_data['volumes'])):
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if volume.get('source_volume') is not None:
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continue
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except Exception as e:
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start_vm = False
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raise e
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if is_script_install:
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# Unmount the volume
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if volume.get('mountpoint') is not None and volume.get('mountpoint') != 'swap':
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print("Cleaning up mount {}{}".format(temp_dir, volume['mountpoint']))
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# Always perform the cleanup steps
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finally:
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# Phase 9 - install cleanup
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# * Unmount any mounted volumes
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# * Remove any temporary directories
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self.update_state(state='RUNNING', meta={'current': 9, 'total': 10, 'status': 'Cleaning up local mounts and directories'})
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time.sleep(1)
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mount_path = "{}{}".format(temp_dir, volume['mountpoint'])
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retcode, stdout, stderr = pvc_common.run_os_command("umount {}".format(mount_path))
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if not is_ova_install:
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for volume in list(reversed(vm_data['volumes'])):
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if volume.get('source_volume') is not None:
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continue
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if is_script_install:
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# Unmount the volume
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if volume.get('mountpoint') is not None and volume.get('mountpoint') != 'swap':
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print("Cleaning up mount {}{}".format(temp_dir, volume['mountpoint']))
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mount_path = "{}{}".format(temp_dir, volume['mountpoint'])
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# Make sure any bind mounts or submounts are unmounted first
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if volume['mountpoint'] == '/':
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retcode, stdout, stderr = pvc_common.run_os_command("umount {}/**{/**,}".format(mount_path))
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retcode, stdout, stderr = pvc_common.run_os_command("umount {}".format(mount_path))
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if retcode:
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print('Failed to unmount "{}": {}'.format(mount_path, stderr))
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# Unmap the RBD device
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if volume['filesystem']:
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print("Cleaning up RBD mapping /dev/rbd/{}/{}_{}".format(volume['pool'], vm_name, volume['disk_id']))
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|
||||
rbd_volume = "/dev/rbd/{}/{}_{}".format(volume['pool'], vm_name, volume['disk_id'])
|
||||
retcode, stdout, stderr = pvc_common.run_os_command("rbd unmap {}".format(rbd_volume))
|
||||
if retcode:
|
||||
raise ProvisioningError('Failed to unmount "{}": {}'.format(mount_path, stderr))
|
||||
print('Failed to unmap volume "{}": {}'.format(rbd_volume, stderr))
|
||||
|
||||
# Unmap the RBD device
|
||||
if volume['filesystem']:
|
||||
print("Cleaning up RBD mapping /dev/rbd/{}/{}_{}".format(volume['pool'], vm_name, volume['disk_id']))
|
||||
print("Cleaning up temporary directories and files")
|
||||
|
||||
rbd_volume = "/dev/rbd/{}/{}_{}".format(volume['pool'], vm_name, volume['disk_id'])
|
||||
retcode, stdout, stderr = pvc_common.run_os_command("rbd unmap {}".format(rbd_volume))
|
||||
if retcode:
|
||||
raise ProvisioningError('Failed to unmap volume "{}": {}'.format(rbd_volume, stderr))
|
||||
if is_script_install:
|
||||
# Remove temporary mount directory (don't fail if not removed)
|
||||
retcode, stdout, stderr = pvc_common.run_os_command("rmdir {}".format(temp_dir))
|
||||
if retcode:
|
||||
print('Failed to delete temporary directory "{}": {}'.format(temp_dir, stderr))
|
||||
|
||||
print("Cleaning up temporary directories and files")
|
||||
# Remote temporary script (don't fail if not removed)
|
||||
retcode, stdout, stderr = pvc_common.run_os_command("rm -f {}".format(script_file))
|
||||
if retcode:
|
||||
print('Failed to delete temporary script file "{}": {}'.format(script_file, stderr))
|
||||
|
||||
if is_script_install:
|
||||
# Remove temporary mount directory (don't fail if not removed)
|
||||
retcode, stdout, stderr = pvc_common.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 = pvc_common.run_os_command("rm -f {}".format(script_file))
|
||||
if retcode:
|
||||
print('Failed to delete temporary script file "{}": {}'.format(script_file, stderr))
|
||||
|
||||
# Phase 10 - startup
|
||||
# * Start the VM in the PVC cluster
|
||||
self.update_state(state='RUNNING', meta={'current': 10, 'total': 10, 'status': 'Starting VM'})
|
||||
time.sleep(1)
|
||||
|
||||
if start_vm:
|
||||
retcode, retmsg = pvc_vm.start_vm(zk_conn, vm_name)
|
||||
print(retmsg)
|
||||
# Phase 10 - startup
|
||||
# * Start the VM in the PVC cluster
|
||||
if start_vm:
|
||||
self.update_state(state='RUNNING', meta={'current': 10, 'total': 10, 'status': 'Starting VM'})
|
||||
time.sleep(1)
|
||||
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}
|
||||
|
|
|
|||
Loading…
Reference in New Issue