HDDS-13640. Add CLI that allows manually triggering snapshot defrag

[smengcl]

What changes were proposed in this pull request?

Add a CLI subcommand that allows snapshot defrag service to be manually triggered.

ozone admin om snapshot defrag --service-id=omservice --node-id=om3

What is the link to the Apache JIRA

https://issues.apache.org/jira/browse/HDDS-13640

How was this patch tested?

• Added unit test
• Added integration test
• Manual testing / logs

[Copilot]

Pull Request Overview

This PR adds a CLI command to manually trigger the snapshot defragmentation service in Ozone Manager, allowing administrators to initiate snapshot defrag operations on demand.

Key changes:

• Added new protobuf message types for snapshot defrag requests/responses
• Implemented the snapshot defrag trigger functionality in OzoneManager with admin privilege checks
• Created a new CLI subcommand triggerSnapshotDefrag with options for service ID, host, and no-wait execution

Reviewed Changes

Copilot reviewed 8 out of 8 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
OmClientProtocol.proto	Added SnapshotDefrag message types and enum value
OzoneManagerProtocol.java	Added triggerSnapshotDefrag method to protocol interface
OzoneManager.java	Implemented snapshot defrag trigger with security checks and async execution
OzoneManagerRequestHandler.java	Added request handling for SnapshotDefrag type
OzoneManagerProtocolClientSideTranslatorPB.java	Added client-side implementation for snapshot defrag requests
OmUtils.java	Added SnapshotDefrag to read-only operation types
TriggerSnapshotDefragSubCommand.java	New CLI command implementation
OMAdmin.java	Registered new subcommand with OM admin CLI

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[errose28]

ozone admin om triggerSnapshotDefrag -id=ozone1

A better CLI name would probably be ozone admin om snapshot defrag. trigger is redundant since we are already executing a command. This will likely not be the last snapshot admin operation added so we should create a separate subcommand to group them.

[smengcl]

ozone admin om triggerSnapshotDefrag -id=ozone1

A better CLI name would probably be ozone admin om snapshot defrag. trigger is redundant since we are already executing a command. This will likely not be the last snapshot admin operation added so we should create a separate subcommand to group them.

Good idea! Done

[Copilot]

Pull Request Overview

Copilot reviewed 13 out of 13 changed files in this pull request and generated 6 comments.

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[jojochuang]

A few minor issues but overall good to me. I'd suggest to merge it and fix the rest in a follow up task.

[jojochuang]

if this is not required, which OM node is going to be used?

[smengcl]

This has to be specified, with the current framework of how OMNodeDetails is retrieved. It won't select OM leader as I initially expected. So I added that null check.

[jojochuang]

LGTM

[swamirishi]

LGTM

[swamirishi]

thanks for the patch @smengcl . Thank you @jojochuang for reviewing the patch