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| author | Brian Elliott <brian.elliott@rackspace.com> | 2012-06-21 04:25:24 +0000 |
|---|---|---|
| committer | Brian Elliott <brian.elliott@rackspace.com> | 2012-08-20 15:46:53 +0000 |
| commit | c7d812a35bf4ef42907366c3f674fd623cd46905 (patch) | |
| tree | cc0cb8ac745d1fae51dafe7c24f499d5b0b27ea8 /nova/exception.py | |
| parent | 740e93aae891d6c20f38b091ad9f54d71db0d7f7 (diff) | |
Keep the ComputeNode model updated with usage
Keep the compute host's ComputeNode model in sync with the
level of resource usage. This enables the ComputeNode
model to be used as a basis for scheduling decisions
rather than forcing scheduler to calculate free
resources from an instance_get_all on each request.
Resources like memory and disk are claimed as instances are built
or deleted. There is also support for configurable compute node
stats (a generic key/value store) for extensible advertising of other
usage stats that may be useful for a particular scheduler
implementation. Additionally, there is a periodic task on the
compute host that audits actual resource consumption at the virt
layer to ensure that the database stays in sync.
This change partially implements blueprint: scheduler-resource-race
This patch complements:
https://review.openstack.org/#/c/9540/ (build re-scheduling support)
Change-Id: Ibbe3839a054f8b80664b413d47f766ca8d68e3f2
Diffstat (limited to 'nova/exception.py')
| -rw-r--r-- | nova/exception.py | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/nova/exception.py b/nova/exception.py index 5d232bdd8..292f8d6ca 100644 --- a/nova/exception.py +++ b/nova/exception.py @@ -351,6 +351,10 @@ class ServiceUnavailable(Invalid): message = _("Service is unavailable at this time.") +class ComputeResourcesUnavailable(ServiceUnavailable): + message = _("Insufficient compute resources.") + + class ComputeServiceUnavailable(ServiceUnavailable): message = _("Compute service is unavailable at this time.") |