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Mitigate permissions loss in Table ACLs by running appliers with single thread #518

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merged 4 commits into from
Oct 27, 2023

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Applying grants that belong to the same principle, object id, and object type concurrently is not supported in legacy Table ACLs currently:

TableAcl grant/revoke operations are not atomic. When granting the permissions, the service would first get all existing permissions, append with the new permissions, and set the full list in the database. If there are concurrent grant requests, both requests might succeed and emit the audit logs, but what actually happens could be that the new permission list from one request overrides the other one, causing permission loss.

This PR will:

@mwojtyczka mwojtyczka requested a review from a team October 27, 2023 16:40
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codecov bot commented Oct 27, 2023

Codecov Report

Merging #518 (a7e9e0b) into main (226f078) will increase coverage by 0.00%.
The diff coverage is 83.33%.

@@           Coverage Diff           @@
##             main     #518   +/-   ##
=======================================
  Coverage   80.64%   80.64%           
=======================================
  Files          31       31           
  Lines        3239     3240    +1     
  Branches      625      626    +1     
=======================================
+ Hits         2612     2613    +1     
  Misses        478      478           
  Partials      149      149           
Files Coverage Δ
...rc/databricks/labs/ucx/workspace_access/manager.py 82.35% <100.00%> (ø)
src/databricks/labs/ucx/framework/parallel.py 91.57% <80.00%> (+0.08%) ⬆️

src/databricks/labs/ucx/framework/parallel.py Show resolved Hide resolved
_, errors = Threads.gather(f"apply {destination} group permissions", applier_tasks)
# run with 1 thread to temp bugfix TableACL grants issue in the platform
# see: https://databricks.atlassian.net/browse/ES-908737
_, errors = Threads.gather(f"apply {destination} group permissions", applier_tasks, num_threads=1)
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get it from configuration, not hardcoded value

@mwojtyczka mwojtyczka enabled auto-merge October 27, 2023 16:58
@mwojtyczka mwojtyczka temporarily deployed to account-admin October 27, 2023 18:16 — with GitHub Actions Inactive
@mwojtyczka mwojtyczka temporarily deployed to account-admin October 27, 2023 19:09 — with GitHub Actions Inactive
@nfx nfx disabled auto-merge October 27, 2023 21:11
@nfx nfx merged commit 18e3b54 into main Oct 27, 2023
@nfx nfx deleted the fix/es908737 branch October 27, 2023 21:11
nfx added a commit that referenced this pull request Nov 17, 2023
**Breaking changes** (existing installations need to reinstall UCX and re-run assessment jobs)

 * Switched local group migration component to rename groups instead of creating backup groups ([#450](#450)).
 * Mitigate permissions loss in Table ACLs by folding grants belonging to the same principal, object id and object type together ([#512](#512)).

**New features**

 * Added support for the experimental Databricks CLI launcher ([#517](#517)).
 * Added support for external Hive Metastores including AWS Glue ([#400](#400)).
 * Added more views to assessment dashboard ([#474](#474)).
 * Added rate limit for creating backup group to increase stability ([#500](#500)).
 * Added deduplication for mount point list ([#569](#569)).
 * Added documentation to describe interaction with external Hive Metastores ([#473](#473)).
 * Added failure injection for job failure message propagation  ([#591](#591)).
 * Added uniqueness in the new warehouse name to avoid conflicts on installation ([#542](#542)).
 * Added a global init script to collect Hive Metastore lineage ([#513](#513)).
 * Added retry set/update permissions when possible and assess the changes in the workspace ([#519](#519)).
 * Use `~/.ucx/state.json` to store the state of both dashboards and jobs ([#561](#561)).

**Bug fixes**

 * Fixed handling for `OWN` table permissions ([#571](#571)).
 * Fixed handling of keys with and without values. ([#514](#514)).
 * Fixed integration test failures related to concurrent group delete ([#584](#584)).
 * Fixed issue with workspace listing process on None type `object_type` ([#481](#481)).
 * Fixed missing group entitlement migration bug ([#583](#583)).
 * Fixed entitlement application for account-level groups ([#529](#529)).
 * Fixed assessment throwing an error when the owner of an object is empty ([#485](#485)).
 * Fixed installer to migrate between different configuration file versions ([#596](#596)).
 * Fixed cluster policy crawler to be aware of deleted policies ([#486](#486)).
 * Improved error message for not null constraints violated ([#532](#532)).
 * Improved integration test resiliency ([#597](#597), [#594](#594), [#586](#586)).
 * Introduced Safer access to workspace objects' properties. ([#530](#530)).
 * Mitigated permissions loss in Table ACLs by running appliers with single thread ([#518](#518)).
 * Running apply permission task before assessment should display message ([#487](#487)).
 * Split integration tests from blocking the merge queue ([#496](#496)).
 * Support more than one dashboard per step ([#472](#472)).
 * Update databricks-sdk requirement from ~=0.11.0 to ~=0.12.0 ([#505](#505)).
 * Update databricks-sdk requirement from ~=0.12.0 to ~=0.13.0 ([#575](#575)).
@nfx nfx mentioned this pull request Nov 17, 2023
nfx added a commit that referenced this pull request Nov 17, 2023
**Breaking changes** (existing installations need to reinstall UCX and
re-run assessment jobs)

* Switched local group migration component to rename groups instead of
creating backup groups
([#450](#450)).
* Mitigate permissions loss in Table ACLs by folding grants belonging to
the same principal, object id and object type together
([#512](#512)).

**New features**

* Added support for the experimental Databricks CLI launcher
([#517](#517)).
* Added support for external Hive Metastores including AWS Glue
([#400](#400)).
* Added more views to assessment dashboard
([#474](#474)).
* Added rate limit for creating backup group to increase stability
([#500](#500)).
* Added deduplication for mount point list
([#569](#569)).
* Added documentation to describe interaction with external Hive
Metastores ([#473](#473)).
* Added failure injection for job failure message propagation
([#591](#591)).
* Added uniqueness in the new warehouse name to avoid conflicts on
installation ([#542](#542)).
* Added a global init script to collect Hive Metastore lineage
([#513](#513)).
* Added retry set/update permissions when possible and assess the
changes in the workspace
([#519](#519)).
* Use `~/.ucx/state.json` to store the state of both dashboards and jobs
([#561](#561)).

**Bug fixes**

* Fixed handling for `OWN` table permissions
([#571](#571)).
* Fixed handling of keys with and without values.
([#514](#514)).
* Fixed integration test failures related to concurrent group delete
([#584](#584)).
* Fixed issue with workspace listing process on None type `object_type`
([#481](#481)).
* Fixed missing group entitlement migration bug
([#583](#583)).
* Fixed entitlement application for account-level groups
([#529](#529)).
* Fixed assessment throwing an error when the owner of an object is
empty ([#485](#485)).
* Fixed installer to migrate between different configuration file
versions ([#596](#596)).
* Fixed cluster policy crawler to be aware of deleted policies
([#486](#486)).
* Improved error message for not null constraints violated
([#532](#532)).
* Improved integration test resiliency
([#597](#597),
[#594](#594),
[#586](#586)).
* Introduced Safer access to workspace objects' properties.
([#530](#530)).
* Mitigated permissions loss in Table ACLs by running appliers with
single thread ([#518](#518)).
* Running apply permission task before assessment should display message
([#487](#487)).
* Split integration tests from blocking the merge queue
([#496](#496)).
* Support more than one dashboard per step
([#472](#472)).
* Update databricks-sdk requirement from ~=0.11.0 to ~=0.12.0
([#505](#505)).
* Update databricks-sdk requirement from ~=0.12.0 to ~=0.13.0
([#575](#575)).
pritishpai pushed a commit that referenced this pull request Nov 21, 2023
**Breaking changes** (existing installations need to reinstall UCX and
re-run assessment jobs)

* Switched local group migration component to rename groups instead of
creating backup groups
([#450](#450)).
* Mitigate permissions loss in Table ACLs by folding grants belonging to
the same principal, object id and object type together
([#512](#512)).

**New features**

* Added support for the experimental Databricks CLI launcher
([#517](#517)).
* Added support for external Hive Metastores including AWS Glue
([#400](#400)).
* Added more views to assessment dashboard
([#474](#474)).
* Added rate limit for creating backup group to increase stability
([#500](#500)).
* Added deduplication for mount point list
([#569](#569)).
* Added documentation to describe interaction with external Hive
Metastores ([#473](#473)).
* Added failure injection for job failure message propagation
([#591](#591)).
* Added uniqueness in the new warehouse name to avoid conflicts on
installation ([#542](#542)).
* Added a global init script to collect Hive Metastore lineage
([#513](#513)).
* Added retry set/update permissions when possible and assess the
changes in the workspace
([#519](#519)).
* Use `~/.ucx/state.json` to store the state of both dashboards and jobs
([#561](#561)).

**Bug fixes**

* Fixed handling for `OWN` table permissions
([#571](#571)).
* Fixed handling of keys with and without values.
([#514](#514)).
* Fixed integration test failures related to concurrent group delete
([#584](#584)).
* Fixed issue with workspace listing process on None type `object_type`
([#481](#481)).
* Fixed missing group entitlement migration bug
([#583](#583)).
* Fixed entitlement application for account-level groups
([#529](#529)).
* Fixed assessment throwing an error when the owner of an object is
empty ([#485](#485)).
* Fixed installer to migrate between different configuration file
versions ([#596](#596)).
* Fixed cluster policy crawler to be aware of deleted policies
([#486](#486)).
* Improved error message for not null constraints violated
([#532](#532)).
* Improved integration test resiliency
([#597](#597),
[#594](#594),
[#586](#586)).
* Introduced Safer access to workspace objects' properties.
([#530](#530)).
* Mitigated permissions loss in Table ACLs by running appliers with
single thread ([#518](#518)).
* Running apply permission task before assessment should display message
([#487](#487)).
* Split integration tests from blocking the merge queue
([#496](#496)).
* Support more than one dashboard per step
([#472](#472)).
* Update databricks-sdk requirement from ~=0.11.0 to ~=0.12.0
([#505](#505)).
* Update databricks-sdk requirement from ~=0.12.0 to ~=0.13.0
([#575](#575)).
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2 participants