ironic-inspector/releasenotes/notes/reapply-introspection-5edbbfaf498dbd12.yaml
dparalen f9e9a88d89 Allow rerunning introspection on stored data
As requested in the related bug, this pull request allows to run the
introspection again on previously stored data.  This should make it simple
to correct mistakes in the introspection rules.

For this purpose, new API entry point was introduced:
/v1/introspection/<UUID>/data/unprocessed that supports an empty POST
method to trigger the introspection over stored data.  New function
`reapply` was introduced that takes care about the entry point and carries
out the introspection.  The `process` function was modified to allow
reusing common parts in the new reapply function.  The storage access
methods were updated to allow saving the "raw" memdisk data besides the
processed introspection data.

Following preconditions are checked the reapply function having been
triggered:
* no data is being sent along with the request
* Swift store is configured and enabled and the stored data is present
  for the node UUID
* node_info object is cached for the UUID and it is possible to lock the
  object

Should the preconditions fail, an immediate response is given to the user:
* 400 if the request contained data or in case Swift store is not enabled
  in configuration
* 409 if it wasn't possible to acquire lock for the node_info object
* 404 in case Ironic didn't keep track of related BM node

If the preconditions are met, a background task is executed to carry out
the processing and a 202 Accepted response is returned to the endpoint
user.

As requested, these steps are performed in the background task:
* preprocessing hooks
* post processing hooks, storing result in Swift
* introspection rules

These steps are avoided, based on the RFE:
* not_found_hook is skipped
* power operations

Limitations:
* IMPI credentials are not updated --- ramdisk not running
* there's no way to update the raw data atm.
* the raw data is never cleaned from the store
* check for stored data presence is performed in background;
  missing data situation still results in a 202 response

Change-Id: Ic027c9d15f7f5475fcc3f599d081d1e8d5e244d4
Closes-Bug: #1525237
2016-04-07 10:40:55 +02:00

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YAML

---
features:
- Introduced API "POST /v1/introspection/UUID/data/unprocessed"
for reapplying the introspection over stored data.