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[controller] Add parallel reconciliation to lvm_logical_volume_watcher. Add VG size validation to lvm_volume_group_watcher #40

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merged 21 commits into from
Apr 25, 2024

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@AleksZimin AleksZimin commented Apr 6, 2024

Description

This PR introduces two improvements to our controllers:

  • lvm_logical_volume_watcher: Parallel Event Processing: We've refactored the reconciliation logic to handle incoming events in parallel, setting MaxConcurrentReconciles to 10. This change aims to enhance the responsiveness and efficiency of the controller by processing multiple events simultaneously. Currently, this value is hardcoded and not configurable.

  • lvm_volume_group_watcher : Volume Group Size Validation: Added a validation step for the size of all thin pools specified in the LVMVolumeGroup spec against the size of the volume group (VG) itself. If the combined sizes of the thin pools exceed the size of the VG, a validation error occurs, preventing any operations on the LVMVolumeGroup. This ensures that the VG's capacity is not overcommitted, maintaining system stability and data integrity.

Why do we need it, and what problem does it solve?

The introduction of parallel reconciliation processing addresses potential bottlenecks in handling high volumes of events, particularly in large, dynamic environments. This enhancement allowslvm_logical_volume_watcher to manage resources more effectively by reducing latency and improving overall performance.

The size validation mechanism for thin pools versus the VG capacity is critical for preventing configuration errors that could lead to system failures or data loss. By ensuring that the thin pools do not exceed the available space in the VG, this feature adds an essential layer of protection against overprovisioning.

What is the expected result?

  • Improved performance and responsiveness of lvm_logical_volume_watcher controller due to parallel processing of events.
  • Increased reliability and safety in LVM management by preventing the creation or modification of LVMVolumeGroup resources that could potentially exceed the physical capacities of the underlying storage.

Checklist

  • The code is covered by unit tests.
  • e2e tests passed.
  • Documentation updated according to the changes.
  • Changes were tested in the Kubernetes cluster manually.

@AleksZimin AleksZimin self-assigned this Apr 6, 2024
@AleksZimin AleksZimin added the enhancement New feature or request label Apr 6, 2024
Base automatically changed from fix-selinux-warning-in-lvm to main April 12, 2024 15:49
ViktorKram and others added 5 commits April 12, 2024 19:01
Signed-off-by: Aleksandr Zimin <[email protected]>
Signed-off-by: Aleksandr Zimin <[email protected]>
Signed-off-by: Aleksandr Zimin <[email protected]>
Signed-off-by: Aleksandr Zimin <[email protected]>
@AleksZimin AleksZimin marked this pull request as ready for review April 15, 2024 13:48
@AleksZimin AleksZimin requested a review from dxavx April 15, 2024 13:49
@AleksZimin AleksZimin changed the title Refactoring lvm_logical_volume_watcher [controller] lvm_logical_volume_watcher Apr 18, 2024
AleksZimin and others added 9 commits April 18, 2024 18:24
Signed-off-by: Aleksandr Zimin <[email protected]>
Signed-off-by: Aleksandr Zimin <[email protected]>
Signed-off-by: Aleksandr Zimin <[email protected]>
Signed-off-by: Aleksandr Zimin <[email protected]>
Signed-off-by: Aleksandr Zimin <[email protected]>
…lume finalizers before the resource deletion.

Signed-off-by: Viktor Kramarenko <[email protected]>

Signed-off-by: Aleksandr Zimin <[email protected]>
Signed-off-by: Aleksandr Zimin <[email protected]>
@AleksZimin AleksZimin changed the title [controller] lvm_logical_volume_watcher [controller] Add parallel reconciliation to lvm_logical_volume_watcher. Add VG size validation to lvm_volume_group_watcher Apr 25, 2024
@AleksZimin AleksZimin merged commit 5e3944c into main Apr 25, 2024
3 checks passed
@AleksZimin AleksZimin deleted the refactoring-lvm_logical_volume_watcher branch April 25, 2024 14:03
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3 participants