class LustreClientMount(DeletableStatefulObject):
host = models.ForeignKey('ManagedHost', help_text = "Mount host", related_name="client_mounts")
filesystem = models.ForeignKey('ManagedFilesystem', help_text = "Mounted filesystem")
mountpoint = models.CharField(max_length = CHARFIELD_MAX_LENGTH,
help_text = "Filesystem mountpoint on host",
null = True,
blank = True)
states = ['unmounted', 'mounted', 'removed']
initial_state = 'unmounted'
def __str__(self):
return self.get_label()
@property
def active(self):
return self.state == 'mounted'
def get_label(self):
return "%s:%s (%s)" % (self.host, self.mountpoint, self.state)
def get_deps(self, state = None):
if not state:
state = self.state
deps = []
if state == 'mounted':
# Depend on this mount's host having LNet up. If LNet is stopped
# on the host, this filesystem will be unmounted first.
deps.append(DependOn(self.host.lnet_configuration, 'lnet_up', fix_state='unmounted'))
if state != 'removed':
# Depend on the fs being available.
deps.append(DependOn(self.filesystem, 'available',
fix_state='unmounted'))
# But if either the host or the filesystem are removed, the
# mount should follow.
deps.append(DependOn(self.host, 'lnet_up', acceptable_states = list(set(self.host.states) - set(['removed', 'forgotten'])), fix_state = 'removed'))
deps.append(DependOn(self.filesystem, 'available', acceptable_states = list(set(self.filesystem.states) - set(['removed', 'forgotten'])), fix_state = 'removed'))
return DependAll(deps)
reverse_deps = {
'ManagedHost': lambda mh: ObjectCache.host_client_mounts(mh.id),
'LNetConfiguration': lambda lc: ObjectCache.host_client_mounts(lc.host.id),
'ManagedFilesystem': lambda mf: ObjectCache.filesystem_client_mounts(mf.id)
}
class Meta:
app_label = 'chroma_core'
unique_together = ('host', 'filesystem')
class LustreClientMount(DeletableStatefulObject):
host = models.ForeignKey("ManagedHost",
help_text="Mount host",
related_name="client_mounts",
on_delete=CASCADE)
filesystem = models.CharField(
max_length=8,
help_text="Mounted filesystem",
null=False,
blank=False,
)
mountpoints = ArrayField(models.TextField(),
default=list,
help_text="Filesystem mountpoints on host")
states = ["unmounted", "mounted", "removed"]
initial_state = "unmounted"
def __str__(self):
return self.get_label()
@property
def active(self):
return self.state == "mounted"
def get_label(self):
return "%s:%s (%s)" % (self.host, self.mountpoints, self.state)
def get_deps(self, state=None):
if not state:
state = self.state
deps = []
if state == "mounted":
# Depend on this mount's host having LNet up. If LNet is stopped
# on the host, this filesystem will be unmounted first.
deps.append(
DependOn(self.host.lnet_configuration,
"lnet_up",
fix_state="unmounted"))
if state != "removed":
try:
fs = ObjectCache.get_one(ManagedFilesystem,
lambda mf: mf.name == self.filesystem)
# Depend on the fs being available.
deps.append(DependOn(fs, "available", fix_state="unmounted"))
# If the filesystem is removed, the
# mount should follow.
deps.append(
DependOn(
fs,
"available",
acceptable_states=list(
set(fs.states) - set(["removed", "forgotten"])),
fix_state="removed",
))
except ManagedFilesystem.DoesNotExist:
pass
# If the host is removed, the
# mount should follow.
deps.append(
DependOn(
self.host,
"lnet_up",
acceptable_states=list(
set(self.host.states) - set(["removed", "forgotten"])),
fix_state="removed",
))
return DependAll(deps)
reverse_deps = {
"ManagedHost":
lambda mh: ObjectCache.host_client_mounts(mh.id),
"LNetConfiguration":
lambda lc: ObjectCache.host_client_mounts(lc.host.id),
"ManagedFilesystem":
lambda mf: ObjectCache.filesystem_client_mounts(mf.name),
}
class Meta:
app_label = "chroma_core"
unique_together = ("host", "filesystem")
