The intention of this feature is primarily to provide some notion of max
capacity of container groups, but the logic I've left generic. Default
is 0, which will be interpereted as no maximum number of jobs or forks.
Includes refactor of variable and method names for clarity.
instances_by_hostname is an internal attribute of TaskManagerInstances.
Clarify when we are expecting the actual TaskManagerInstances object.
Unify how we process running tasks and consume capacity. This has the
effect that we do less expensive work in after_lock_init and have 1 less
loop over all the running tasks. Previously we looped for both building
the dependency graph as well as for calculating the starting capacity of
all the instances and instance groups. Now we acheive both tasks in the
same loop.
Because of how this changes the somewhat subtle "do-si-do" of how to
initialize the Task Manager models, introduce a wrapper class that tries
to take some of that burden off of other areas where we re-use this like
in the serializer and the metrics. Also use this wrapper class to handle
nicities of how to track capacity consumption on instances and instance
groups.
Add tests for max_forks and max_concurrent_jobs
Fixup tests that use TaskManagerModels to accomodate changes.
assign ig before call to consume capacity
if we don't do it in that order, then we don't correctly account for
the container group jobs we are starting in the middle of the task
manager run
We should be consistent about this. Also this takes us from doing a as
many queries to the UnifiedJob table as we have instances to doing 1
query to the UnifiedJob table (and both do 1 query to Instances table)
When creating unified job, stash the list of pk values from the
instance groups returned from preferred_instance_groups so that the
task management system does not need to call out to this method
repeatedly.
.preferred_instance_groups_cache is the new field
* Remove committed_capacity field, delete supporting code
* Track consumed capacity to solve the negatives problem
* Use more verbose name for IG queryset
* move static methods used by task manager
These static methods were being used to act on Instance-like objects
that were SimpleNamespace objects with the necessary attributes.
This change introduces dedicated classes to replace the SimpleNamespace
objects and moves the formerlly staticmethods to a place where they are
more relevant instead of tacked onto models to which they were only
loosly related.
Accept in-memory data structure in init methods for tests
* initialize remaining capacity AFTER we built map of instances
