Convert vmbuilder to use new Celery step structure
This commit is contained in:
parent
e92ed245d6
commit
f50f170d4e
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@ -26,7 +26,6 @@ import re
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import os
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# import sys
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import time
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import importlib.util
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import uuid
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@ -35,6 +34,7 @@ from contextlib import contextmanager
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from pvcapid.Daemon import config
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from daemon_lib.zkhandler import ZKHandler
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from daemon_lib.celery import start, fail, log_info, log_warn, update, finish
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import daemon_lib.common as pvc_common
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import daemon_lib.node as pvc_node
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@ -137,7 +137,10 @@ def chroot(destination):
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os.fchdir(fake_root)
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yield
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except Exception:
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raise
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fail(
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None,
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f"Failed to chroot into {destination}",
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)
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finally:
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os.fchdir(real_root)
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os.chroot(".")
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@ -160,12 +163,19 @@ def open_db(config):
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)
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cur = conn.cursor(cursor_factory=psycopg2.extras.RealDictCursor)
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except Exception:
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raise ClusterError("Failed to connect to Postgres")
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fail(
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None,
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"Failed to connect to Postgres",
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exception=ClusterError,
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)
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try:
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yield cur
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except Exception:
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raise
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fail(
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None,
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"Failed to yield database handle",
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)
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finally:
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conn.commit()
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cur.close()
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@ -179,12 +189,19 @@ def open_zk(config):
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zkhandler = ZKHandler(config)
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zkhandler.connect()
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except Exception:
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raise ClusterError("Failed to connect to Zookeeper")
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fail(
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None,
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"Failed to connect to Zookeeper",
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exception=ClusterError,
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)
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try:
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yield zkhandler
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except Exception:
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raise
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fail(
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None,
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"Failed to yield Zookeeper connection",
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)
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finally:
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zkhandler.disconnect()
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del zkhandler
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@ -194,19 +211,28 @@ def open_zk(config):
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# Main VM provisioning function - executed by the Celery worker
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#
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def create_vm(
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self, vm_name, vm_profile, define_vm=True, start_vm=True, script_run_args=[]
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celery, vm_name, vm_profile, define_vm=True, start_vm=True, script_run_args=[]
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):
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print(f"Starting provisioning of VM '{vm_name}' with profile '{vm_profile}'")
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current_stage = 0
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total_stages = 10
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start(
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celery,
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f"Starting provisioning of VM '{vm_name}' with profile '{vm_profile}'",
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current=current_stage,
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total=total_stages,
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)
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# Phase 1 - setup
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# * Get the profile elements
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# * Get the details from these elements
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# * Assemble a VM configuration dictionary
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self.update_state(
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state="RUNNING",
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meta={"current": 1, "total": 10, "status": "Collecting configuration"},
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current_stage += 1
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update(
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celery,
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"Collecting configuration details",
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current=current_stage,
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total=total_stages,
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)
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time.sleep(1)
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vm_id = re.findall(r"/(\d+)$/", vm_name)
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if not vm_id:
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@ -313,13 +339,14 @@ def create_vm(
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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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log_info(celery, f"Script arguments: {script_arguments}")
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vm_data["script_arguments"] = script_arguments
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print(
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log_info(
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celery,
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"VM configuration data:\n{}".format(
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json.dumps(vm_data, sort_keys=True, indent=2)
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)
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),
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)
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# Phase 2 - verification
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@ -327,21 +354,21 @@ def create_vm(
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# * Ensure that all networks are valid
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# * Ensure that there is enough disk space in the Ceph cluster for the disks
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# This is the "safe fail" step when an invalid configuration will be caught
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self.update_state(
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state="RUNNING",
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meta={
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"current": 2,
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"total": 10,
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"status": "Verifying configuration against cluster",
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},
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current_stage += 1
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update(
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celery,
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"Verifying configuration against cluster",
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current=current_stage,
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total=total_stages,
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)
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time.sleep(1)
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with open_zk(config) as zkhandler:
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# Verify that a VM with this name does not already exist
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if pvc_vm.searchClusterByName(zkhandler, vm_name):
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raise ClusterError(
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"A VM with the name '{}' already exists in the cluster.".format(vm_name)
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fail(
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celery,
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f"A VM with the name '{vm_name}' already exists in the cluster.",
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exception=ClusterError,
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)
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# Verify that at least one host has enough free RAM to run the VM
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@ -361,16 +388,15 @@ def create_vm(
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target_node = node["name"]
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# Raise if no node was found
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if not target_node:
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raise ClusterError(
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"No ready cluster node contains at least {}+512 MB of free RAM.".format(
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vm_data["system_details"]["vram_mb"]
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)
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fail(
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celery,
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f"No ready cluster node contains at least {vm_data['system_details']['vram_mb']}+512 MB of free RAM",
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exception=ClusterError,
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)
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print(
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'Selecting target node "{}" with "{}" MB free RAM'.format(
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target_node, last_free
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)
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log_info(
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celery,
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f'Selecting target node "{target_node}" with "{last_free}" MB free RAM',
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)
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# Verify that all configured networks are present on the cluster
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@ -382,11 +408,13 @@ def create_vm(
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"cluster",
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"storage",
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]:
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raise ClusterError(
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'The network VNI "{}" is not present on the cluster.'.format(vni)
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fail(
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celery,
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f'The network VNI "{vni}" is not present on the cluster.',
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exception=ClusterError,
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)
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print("All configured networks for VM are valid")
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log_info(celery, "All configured networks for VM are valid")
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# Verify that there is enough disk space free to provision all VM disks
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pools = dict()
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@ -396,10 +424,10 @@ def create_vm(
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zkhandler, volume["pool"], volume["source_volume"]
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)
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if not volume_data:
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raise ClusterError(
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"The source volume {}/{} could not be found.".format(
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volume["pool"], volume["source_volume"]
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)
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fail(
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celery,
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f"The source volume {volume['pool']}/{volume['source_volume']} could not be found.",
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exception=ClusterError,
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)
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if not volume["pool"] in pools:
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pools[volume["pool"]] = int(
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@ -427,8 +455,10 @@ def create_vm(
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if not pool_information:
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raise
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except Exception:
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raise ClusterError(
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'Pool "{}" is not present on the cluster.'.format(pool)
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fail(
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celery,
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f'Pool "{pool}" is not present on the cluster.',
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exception=ClusterError,
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)
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pool_free_space_gb = int(
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pool_information["stats"]["free_bytes"] / 1024 / 1024 / 1024
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@ -436,13 +466,13 @@ def create_vm(
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pool_vm_usage_gb = int(pools[pool])
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if pool_vm_usage_gb >= pool_free_space_gb:
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raise ClusterError(
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'Pool "{}" has only {} GB free and VM requires {} GB.'.format(
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pool, pool_free_space_gb, pool_vm_usage_gb
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)
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fail(
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celery,
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f'Pool "{pool}" has only {pool_free_space_gb} GB free but VM requires {pool_vm_usage_gb} GB.',
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exception=ClusterError,
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)
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print("There is enough space on cluster to store VM volumes")
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log_info(celery, "There is enough space on cluster to store VM volumes")
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# Verify that every specified filesystem is valid
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used_filesystems = list()
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@ -461,33 +491,44 @@ def create_vm(
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elif filesystem == "swap":
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retcode, stdout, stderr = pvc_common.run_os_command("which mkswap")
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if retcode:
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raise ProvisioningError(
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"Failed to find binary for mkswap: {}".format(stderr)
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fail(
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celery,
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f"Failed to find binary for mkswap: {stderr}",
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exception=ProvisioningError,
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)
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else:
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retcode, stdout, stderr = pvc_common.run_os_command(
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"which mkfs.{}".format(filesystem)
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)
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if retcode:
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raise ProvisioningError(
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"Failed to find binary for mkfs.{}: {}".format(filesystem, stderr)
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fail(
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celery,
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f"Failed to find binary for mkfs.{filesystem}: {stderr}",
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exception=ProvisioningError,
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)
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print("All selected filesystems are valid")
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log_info(celery, "All selected filesystems are valid")
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# Phase 3 - provisioning script preparation
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# * Import the provisioning script as a library with importlib
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# * Ensure the required function(s) are present
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self.update_state(
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state="RUNNING",
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meta={"current": 3, "total": 10, "status": "Preparing provisioning script"},
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current_stage += 1
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update(
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celery,
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"Preparing provisioning script",
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current=current_stage,
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total=total_stages,
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)
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time.sleep(1)
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# Write the script out to a temporary file
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retcode, stdout, stderr = pvc_common.run_os_command("mktemp")
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if retcode:
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raise ProvisioningError("Failed to create a temporary file: {}".format(stderr))
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fail(
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celery,
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f"Failed to create a temporary file: {stderr}",
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exception=ProvisioningError,
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)
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script_file = stdout.strip()
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with open(script_file, "w") as fh:
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fh.write(vm_data["script"])
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@ -507,12 +548,17 @@ def create_vm(
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vm_data=vm_data,
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)
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print("Provisioning script imported successfully")
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log_info(celery, "Provisioning script imported successfully")
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# Create temporary directory for external chroot
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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(f"Failed to create a temporary directory: {stderr}")
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fail(
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celery,
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f"Failed to create a temporary directory: {stderr}",
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exception=ProvisioningError,
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)
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temp_dir = stdout.strip()
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# Bind mount / to the chroot location /
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@ -520,8 +566,10 @@ def create_vm(
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f"mount --bind --options ro / {temp_dir}"
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)
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if retcode:
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raise ProvisioningError(
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f"Failed to mount rootfs onto {temp_dir} for chroot: {stderr}"
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fail(
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celery,
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f"Failed to mount rootfs into {temp_dir} for chroot: {stderr}",
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exception=ProvisioningError,
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)
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# Mount tmpfs to the chroot location /tmp
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@ -529,8 +577,10 @@ def create_vm(
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f"mount --type tmpfs tmpfs {temp_dir}/tmp"
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)
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if retcode:
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raise ProvisioningError(
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f"Failed to mount tmpfs onto {temp_dir}/tmp for chroot: {stderr}"
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fail(
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celery,
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f"Failed to mount tmpfs onto {temp_dir}/tmp for chroot: {stderr}",
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exception=ProvisioningError,
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)
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# Bind mount /dev to the chroot location /dev
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@ -538,8 +588,10 @@ def create_vm(
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f"mount --bind --options ro /dev {temp_dir}/dev"
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)
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if retcode:
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raise ProvisioningError(
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f"Failed to mount devfs onto {temp_dir}/dev for chroot: {stderr}"
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fail(
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celery,
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f"Failed to mount devfs onto {temp_dir}/dev for chroot: {stderr}",
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exception=ProvisioningError,
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)
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# Bind mount /run to the chroot location /run
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@ -547,8 +599,10 @@ def create_vm(
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f"mount --bind --options rw /run {temp_dir}/run"
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)
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if retcode:
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raise ProvisioningError(
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f"Failed to mount runfs onto {temp_dir}/run for chroot: {stderr}"
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fail(
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celery,
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f"Failed to mount runfs onto {temp_dir}/run for chroot: {stderr}",
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exception=ProvisioningError,
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)
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# Bind mount /sys to the chroot location /sys
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@ -556,8 +610,10 @@ def create_vm(
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f"mount --bind --options rw /sys {temp_dir}/sys"
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)
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if retcode:
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raise ProvisioningError(
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f"Failed to mount sysfs onto {temp_dir}/sys for chroot: {stderr}"
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fail(
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celery,
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f"Failed to mount sysfs onto {temp_dir}/sys for chroot: {stderr}",
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exception=ProvisioningError,
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)
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# Bind mount /proc to the chroot location /proc
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@ -565,14 +621,16 @@ def create_vm(
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f"mount --bind --options rw /proc {temp_dir}/proc"
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)
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if retcode:
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raise ProvisioningError(
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f"Failed to mount procfs onto {temp_dir}/proc for chroot: {stderr}"
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fail(
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celery,
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f"Failed to mount procfs onto {temp_dir}/proc for chroot: {stderr}",
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exception=ProvisioningError,
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)
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print("Chroot environment prepared successfully")
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log_info(celery, "Chroot environment prepared successfully")
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def general_cleanup():
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print("Running upper cleanup steps")
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log_info(celery, "Running upper cleanup steps")
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try:
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# Unmount bind-mounted devfs on the chroot
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|
@ -599,68 +657,65 @@ def create_vm(
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retcode, stdout, stderr = pvc_common.run_os_command(f"umount {temp_dir}")
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except Exception as e:
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# We don't care about fails during cleanup, log and continue
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print(f"Suberror during general cleanup unmounts: {e}")
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log_warn(celery, f"Suberror during general cleanup unmounts: {e}")
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try:
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# Remove the temp_dir
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os.rmdir(temp_dir)
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except Exception as e:
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# We don't care about fails during cleanup, log and continue
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print(f"Suberror during general cleanup directory removal: {e}")
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log_warn(celery, f"Suberror during general cleanup directory removal: {e}")
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try:
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# Remote temporary script (don't fail if not removed)
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os.remove(script_file)
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except Exception as e:
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# We don't care about fails during cleanup, log and continue
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print(f"Suberror during general cleanup script removal: {e}")
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log_warn(celery, f"Suberror during general cleanup script removal: {e}")
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# Phase 4 - script: setup()
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# * Run pre-setup steps
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self.update_state(
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state="RUNNING",
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meta={
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"current": 4,
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"total": 10,
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"status": "Running script setup() step",
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},
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current_stage += 1
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update(
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celery, "Running script setup() step", current=current_stage, total=total_stages
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)
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time.sleep(1)
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print("Running script setup() step")
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try:
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with chroot(temp_dir):
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vm_builder.setup()
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except Exception as e:
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general_cleanup()
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raise ProvisioningError(f"Error in script setup() step: {e}")
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fail(
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celery,
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f"Error in script setup() step: {e}",
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exception=ProvisioningError,
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)
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# Phase 5 - script: create()
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# * Prepare the libvirt XML defintion for the VM
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self.update_state(
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state="RUNNING",
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meta={
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"current": 5,
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"total": 10,
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"status": "Running script create() step",
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},
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current_stage += 1
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update(
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celery,
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"Running script create() step",
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current=current_stage,
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total=total_stages,
|
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)
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time.sleep(1)
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|
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if define_vm:
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print("Running script create() step")
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try:
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with chroot(temp_dir):
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vm_schema = vm_builder.create()
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except Exception as e:
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general_cleanup()
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raise ProvisioningError(f"Error in script create() step: {e}")
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fail(
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celery,
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f"Error in script create() step: {e}",
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exception=ProvisioningError,
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)
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print("Generated VM schema:\n{}\n".format(vm_schema))
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log_info(celery, "Generated VM schema:\n{}\n".format(vm_schema))
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print("Defining VM on cluster")
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log_info(celery, "Defining VM on cluster")
|
||||
node_limit = vm_data["system_details"]["node_limit"]
|
||||
if node_limit:
|
||||
node_limit = node_limit.split(",")
|
||||
|
@ -679,23 +734,19 @@ def create_vm(
|
|||
vm_profile,
|
||||
initial_state="provision",
|
||||
)
|
||||
print(retmsg)
|
||||
log_info(celery, retmsg)
|
||||
else:
|
||||
print("Skipping VM definition due to define_vm=False")
|
||||
log_info("Skipping VM definition due to define_vm=False")
|
||||
|
||||
# Phase 6 - script: prepare()
|
||||
# * Run preparation steps (e.g. disk creation and mapping, filesystem creation, etc.)
|
||||
self.update_state(
|
||||
state="RUNNING",
|
||||
meta={
|
||||
"current": 6,
|
||||
"total": 10,
|
||||
"status": "Running script prepare() step",
|
||||
},
|
||||
current_stage += 1
|
||||
update(
|
||||
celery,
|
||||
"Running script prepare() step",
|
||||
current=current_stage,
|
||||
total=total_stages,
|
||||
)
|
||||
time.sleep(1)
|
||||
|
||||
print("Running script prepare() step")
|
||||
|
||||
try:
|
||||
with chroot(temp_dir):
|
||||
|
@ -704,21 +755,21 @@ def create_vm(
|
|||
with chroot(temp_dir):
|
||||
vm_builder.cleanup()
|
||||
general_cleanup()
|
||||
raise ProvisioningError(f"Error in script prepare() step: {e}")
|
||||
fail(
|
||||
celery,
|
||||
f"Error in script prepare() step: {e}",
|
||||
exception=ProvisioningError,
|
||||
)
|
||||
|
||||
# Phase 7 - script: install()
|
||||
# * Run installation with arguments
|
||||
self.update_state(
|
||||
state="RUNNING",
|
||||
meta={
|
||||
"current": 7,
|
||||
"total": 10,
|
||||
"status": "Running script install() step",
|
||||
},
|
||||
current_stage += 1
|
||||
update(
|
||||
celery,
|
||||
"Running script install() step",
|
||||
current=current_stage,
|
||||
total=total_stages,
|
||||
)
|
||||
time.sleep(1)
|
||||
|
||||
print("Running script install() step")
|
||||
|
||||
try:
|
||||
with chroot(temp_dir):
|
||||
|
@ -727,63 +778,63 @@ def create_vm(
|
|||
with chroot(temp_dir):
|
||||
vm_builder.cleanup()
|
||||
general_cleanup()
|
||||
raise ProvisioningError(f"Error in script install() step: {e}")
|
||||
fail(
|
||||
celery,
|
||||
f"Error in script install() step: {e}",
|
||||
exception=ProvisioningError,
|
||||
)
|
||||
|
||||
# Phase 8 - script: cleanup()
|
||||
# * Run cleanup steps
|
||||
self.update_state(
|
||||
state="RUNNING",
|
||||
meta={
|
||||
"current": 8,
|
||||
"total": 10,
|
||||
"status": "Running script cleanup() step",
|
||||
},
|
||||
current_stage += 1
|
||||
update(
|
||||
celery,
|
||||
"Running script cleanup() step",
|
||||
current=current_stage,
|
||||
total=total_stages,
|
||||
)
|
||||
time.sleep(1)
|
||||
|
||||
print("Running script cleanup() step")
|
||||
|
||||
try:
|
||||
with chroot(temp_dir):
|
||||
vm_builder.cleanup()
|
||||
except Exception as e:
|
||||
general_cleanup()
|
||||
raise ProvisioningError(f"Error in script cleanup() step: {e}")
|
||||
fail(
|
||||
celery,
|
||||
f"Error in script cleanup() step: {e}",
|
||||
exception=ProvisioningError,
|
||||
)
|
||||
|
||||
# Phase 9 - general cleanup
|
||||
# * Clean up the chroot from earlier
|
||||
self.update_state(
|
||||
state="RUNNING",
|
||||
meta={
|
||||
"current": 9,
|
||||
"total": 10,
|
||||
"status": "Running general cleanup steps",
|
||||
},
|
||||
current_stage += 1
|
||||
update(
|
||||
celery,
|
||||
"Running general cleanup steps",
|
||||
current=current_stage,
|
||||
total=total_stages,
|
||||
)
|
||||
time.sleep(1)
|
||||
|
||||
general_cleanup()
|
||||
|
||||
# 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)
|
||||
current_stage += 1
|
||||
update(celery, "Starting VM", current=current_stage, total=total_stages)
|
||||
|
||||
if start_vm:
|
||||
print("Starting VM")
|
||||
with open_zk(config) as zkhandler:
|
||||
success, message = pvc_vm.start_vm(zkhandler, vm_name)
|
||||
print(message)
|
||||
log_info(celery, message)
|
||||
|
||||
end_message = f'VM "{vm_name}" with profile "{vm_profile}" has been provisioned and started successfully'
|
||||
else:
|
||||
end_message = f'VM "{vm_name}" with profile "{vm_profile}" has been provisioned successfully'
|
||||
|
||||
return {"status": end_message, "current": 10, "total": 10}
|
||||
current_stage += 1
|
||||
return finish(
|
||||
celery,
|
||||
end_message,
|
||||
current=current_stage,
|
||||
total=total_stages,
|
||||
)
|
||||
|
|
|
@ -41,11 +41,17 @@ def start(celery, msg, current=0, total=1):
|
|||
sleep(1)
|
||||
|
||||
|
||||
def fail(celery, msg, current=1, total=1):
|
||||
def fail(celery, msg, exception=None, current=1, total=1):
|
||||
if exception is None:
|
||||
exception = TaskFailure
|
||||
|
||||
msg = f"{exception}: {msg}"
|
||||
|
||||
logger = getLogger(__name__)
|
||||
logger.error(msg)
|
||||
|
||||
sys.tracebacklimit = 0
|
||||
raise TaskFailure(msg)
|
||||
raise exception(msg)
|
||||
|
||||
|
||||
def log_info(celery, msg):
|
||||
|
|
Loading…
Reference in New Issue