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clear up Machine models cache vars

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Nick Sweeting 2024-10-14 15:38:32 -07:00
parent b3b2c551c2
commit 536a5ea745
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1 changed files with 37 additions and 56 deletions
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93
archivebox/machine/models.py
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@ -11,63 +11,38 @@ from django.utils.functional import cached_property
import abx.archivebox.use
from abx.archivebox.base_binary import BaseBinary, BaseBinProvider
from archivebox.abid_utils.models import ABIDModel, ABIDField, AutoDateTimeField
from archivebox.abid_utils.models import ABIDModel, ABIDField, AutoDateTimeField, ModelWithHealthStats
from .detect import get_host_guid, get_os_info, get_vm_info, get_host_network, get_host_stats
CURRENT_MACHINE = None # global cache for the current machine
CURRENT_INTERFACE = None # global cache for the current network interface
CURRENT_BINARIES = {} # global cache for the currently installed binaries
_CURRENT_MACHINE = None # global cache for the current machine
_CURRENT_INTERFACE = None # global cache for the current network interface
_CURRENT_BINARIES = {} # global cache for the currently installed binaries
MACHINE_RECHECK_INTERVAL = 7 * 24 * 60 * 60 # 1 week (how often should we check for OS/hardware changes?)
NETWORK_INTERFACE_RECHECK_INTERVAL = 1 * 60 * 60 # 1 hour (how often should we check for public IP/private IP/DNS changes?)
INSTALLED_BINARY_RECHECK_INTERVAL = 1 * 30 * 60 # 30min (how often should we check for changes to locally installed binaries?)
class ModelWithHealthStats(models.Model):
num_uses_failed = models.PositiveIntegerField(default=0)
num_uses_succeeded = models.PositiveIntegerField(default=0)
class Meta:
abstract = True
def record_health_failure(self) -> None:
self.num_uses_failed += 1
self.save()
def record_health_success(self) -> None:
self.num_uses_succeeded += 1
self.save()
def reset_health(self) -> None:
# move all the failures to successes when resetting so we dont lose track of the total count
self.num_uses_succeeded = self.num_uses_failed + self.num_uses_succeeded
self.num_uses_failed = 0
self.save()
@property
def health(self) -> int:
total_uses = max((self.num_uses_failed + self.num_uses_succeeded, 1))
success_pct = (self.num_uses_succeeded / total_uses) * 100
return round(success_pct)
class MachineManager(models.Manager):
def current(self) -> 'Machine':
"""Get the current machine that ArchiveBox is running on."""
global CURRENT_MACHINE
if CURRENT_MACHINE:
expires_at = CURRENT_MACHINE.modified_at + timedelta(seconds=MACHINE_RECHECK_INTERVAL)
global _CURRENT_MACHINE
if _CURRENT_MACHINE:
expires_at = _CURRENT_MACHINE.modified_at + timedelta(seconds=MACHINE_RECHECK_INTERVAL)
if timezone.now() < expires_at:
# assume current machine cant change *while archivebox is actively running on it*
# it's not strictly impossible to swap hardware while code is running,
# but its rare and unusual so we check only once per week
# (e.g. VMWare can live-migrate a VM to a new host while it's running)
return CURRENT_MACHINE
return _CURRENT_MACHINE
else:
CURRENT_MACHINE = None
_CURRENT_MACHINE = None
CURRENT_MACHINE, _created = self.update_or_create(
_CURRENT_MACHINE, _created = self.update_or_create(
guid=get_host_guid(),
defaults={
'hostname': socket.gethostname(),
@ -76,11 +51,14 @@ class MachineManager(models.Manager):
'stats': get_host_stats(),
},
)
CURRENT_MACHINE.save() # populate ABID
_CURRENT_MACHINE.save() # populate ABID
return CURRENT_MACHINE
return _CURRENT_MACHINE
class Machine(ABIDModel, ModelWithHealthStats):
"""Audit log entry for a physical machine that was used to do archiving."""
abid_prefix = 'mxn_'
abid_ts_src = 'self.created_at'
abid_uri_src = 'self.guid'
@ -113,6 +91,7 @@ class Machine(ABIDModel, ModelWithHealthStats):
# STATS COUNTERS
stats = models.JSONField(default=dict, null=False) # e.g. {"cpu_load": [1.25, 2.4, 1.4], "mem_swap_used_pct": 56, ...}
# num_uses_failed = models.PositiveIntegerField(default=0) # from ModelWithHealthStats
# num_uses_succeeded = models.PositiveIntegerField(default=0)
@ -127,18 +106,18 @@ class NetworkInterfaceManager(models.Manager):
def current(self) -> 'NetworkInterface':
"""Get the current network interface for the current machine."""
global CURRENT_INTERFACE
if CURRENT_INTERFACE:
global _CURRENT_INTERFACE
if _CURRENT_INTERFACE:
# assume the current network interface (public IP, DNS servers, etc.) wont change more than once per hour
expires_at = CURRENT_INTERFACE.modified_at + timedelta(seconds=NETWORK_INTERFACE_RECHECK_INTERVAL)
expires_at = _CURRENT_INTERFACE.modified_at + timedelta(seconds=NETWORK_INTERFACE_RECHECK_INTERVAL)
if timezone.now() < expires_at:
return CURRENT_INTERFACE
return _CURRENT_INTERFACE
else:
CURRENT_INTERFACE = None
_CURRENT_INTERFACE = None
machine = Machine.objects.current()
net_info = get_host_network()
CURRENT_INTERFACE, _created = self.update_or_create(
_CURRENT_INTERFACE, _created = self.update_or_create(
machine=machine,
ip_public=net_info.pop('ip_public'),
ip_local=net_info.pop('ip_local'),
@ -146,14 +125,16 @@ class NetworkInterfaceManager(models.Manager):
dns_server=net_info.pop('dns_server'),
defaults=net_info,
)
CURRENT_INTERFACE.save() # populate ABID
_CURRENT_INTERFACE.save() # populate ABID
return CURRENT_INTERFACE
return _CURRENT_INTERFACE
class NetworkInterface(ABIDModel, ModelWithHealthStats):
"""Audit log entry for a physical network interface / internet connection that was used to do archiving."""
abid_prefix = 'ixf_'
abid_ts_src = 'self.machine.created_at'
abid_uri_src = 'self.machine.guid'
@ -183,7 +164,7 @@ class NetworkInterface(ABIDModel, ModelWithHealthStats):
region = models.CharField(max_length=63, default=None, null=False) # e.g. California
country = models.CharField(max_length=63, default=None, null=False) # e.g. United States
# STATS COUNTERS (from ModelWithHealthStats)
# STATS COUNTERS (inherited from ModelWithHealthStats)
# num_uses_failed = models.PositiveIntegerField(default=0)
# num_uses_succeeded = models.PositiveIntegerField(default=0)
@ -202,8 +183,8 @@ class InstalledBinaryManager(models.Manager):
def get_from_db_or_cache(self, binary: BaseBinary) -> 'InstalledBinary':
"""Get or create an InstalledBinary record for a Binary on the local machine"""
global CURRENT_BINARIES
cached_binary = CURRENT_BINARIES.get(binary.id)
global _CURRENT_BINARIES
cached_binary = _CURRENT_BINARIES.get(binary.id)
if cached_binary:
expires_at = cached_binary.modified_at + timedelta(seconds=INSTALLED_BINARY_RECHECK_INTERVAL)
if timezone.now() < expires_at:
@ -218,7 +199,7 @@ class InstalledBinaryManager(models.Manager):
or binary.sha256 != cached_binary.sha256
)
if is_different_from_cache:
CURRENT_BINARIES.pop(binary.id)
_CURRENT_BINARIES.pop(binary.id)
else:
return cached_binary
else:
@ -229,7 +210,7 @@ class InstalledBinaryManager(models.Manager):
return cached_binary
else:
# cached binary is too old, reload it from scratch
CURRENT_BINARIES.pop(binary.id)
_CURRENT_BINARIES.pop(binary.id)
if not binary.abspath or not binary.version or not binary.sha256:
# if binary was not yet loaded from filesystem, do it now
@ -239,7 +220,7 @@ class InstalledBinaryManager(models.Manager):
assert binary.loaded_binprovider and binary.loaded_abspath and binary.loaded_version and binary.loaded_sha256, f'Failed to load binary {binary.name} abspath, version, and sha256'
CURRENT_BINARIES[binary.id], _created = self.update_or_create(
_CURRENT_BINARIES[binary.id], _created = self.update_or_create(
machine=Machine.objects.current(),
name=binary.name,
binprovider=binary.loaded_binprovider.name,
@ -247,7 +228,7 @@ class InstalledBinaryManager(models.Manager):
abspath=str(binary.loaded_abspath),
sha256=str(binary.loaded_sha256),
)
cached_binary = CURRENT_BINARIES[binary.id]
cached_binary = _CURRENT_BINARIES[binary.id]
cached_binary.save() # populate ABID
# if we get this far make sure DB record matches in-memroy cache
@ -282,11 +263,11 @@ class InstalledBinary(ABIDModel, ModelWithHealthStats):
version = models.CharField(max_length=32, default=None, null=False, blank=True)
sha256 = models.CharField(max_length=64, default=None, null=False, blank=True)
# MUTABLE PROPERTIES
# MUTABLE PROPERTIES (TODO)
# is_pinned = models.BooleanField(default=False) # i.e. should this binary superceede other binaries with the same name on the host?
# is_valid = models.BooleanField(default=True) # i.e. is this binary still available on the host?
# STATS COUNTERS (from ModelWithHealthStats)
# STATS COUNTERS (inherited from ModelWithHealthStats)
# num_uses_failed = models.PositiveIntegerField(default=0)
# num_uses_succeeded = models.PositiveIntegerField(default=0)