PBM-1618: Minio as storage type for Custom-S3 storages

[boris-ilijic]

PR started as the bug fix for PBM-1618.
PR implements the feature described in PBM-1631.

PR adds a new storage type called minio, which uses minio client and enables targeting any custom S3-compatible storage.
PBM config for minio storage type looks like:

storage:
  type: minio
  minio:
    region: <string>
    bucket: <string>
    prefix: <string>
    endpoint: <string>
    endpointMap: 
      "node01:2017": <string>
      "node02:2017": <string>
    secure: false
    insecureSkipTLSVerify: false
    forcePathStyle: false
    credentials:
      access-key-id: <string>
      secret-access-key: <string>
      session-token: <string>
      signature-ver: V4
    partSize: 10485760 (10 MB)
    retryer:
      numMaxRetries: 10
    maxObjSizeGB: 5018
    debugTrace: false 

Default values are specified within example above.
Besides standard configuration parameters, the following are specific to minio:

• secure: using http or https
• credentials.signature-ver: using latest AWS Signature Version 4 or the previous one Version 2 (V2 should be used in config)
• debugTrace: if true it'll output all http communication trace in pbm's log

[Copilot]

Pull Request Overview

This PR implements MinIO as a new storage type for Custom-S3 storages in the Percona Backup for MongoDB (PBM) system. The implementation provides MinIO-specific storage functionality while maintaining compatibility with the existing storage interface.

Key changes:

• Added new mio package with MinIO-specific storage implementation
• Integrated MinIO storage type into the existing storage configuration and factory system
• Refactored S3/GCS constants to avoid duplication

Reviewed Changes

Copilot reviewed 13 out of 34 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
pbm/util/storage.go	Added factory methods for creating MinIO storage instances
pbm/storage/storage.go	Added MinIO as a new storage type constant and parsing support
pbm/storage/s3/s3.go	Removed duplicate GCS endpoint constant and provider field
pbm/storage/mio/minio.go	Core MinIO storage implementation with upload, download, and file operations
pbm/storage/mio/download.go	MinIO-specific download functionality with concurrent chunk handling
pbm/storage/mio/config.go	Configuration structure and validation for MinIO storage
pbm/storage/mio/config_test.go	Unit tests for MinIO configuration functionality
pbm/storage/mio/minio_test.go	Integration tests using testcontainers for MinIO validation
pbm/storage/gcs/gcs.go	Added GCS endpoint constant to replace removed duplicate
pbm/storage/gcs/hmac_client.go	Updated to use the new GCS endpoint constant
pbm/config/config.go	Integrated MinIO configuration into the main config structure
pbm/config/config_test.go	Added tests for MinIO configuration handling
go.mod	Added google/go-cmp dependency for test comparisons

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[Copilot]

Pull Request Overview

Copilot reviewed 18 out of 39 changed files in this pull request and generated 2 comments.

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[Copilot]

Pull Request Overview

Copilot reviewed 18 out of 39 changed files in this pull request and generated 3 comments.

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[Copilot]

Pull Request Overview

Copilot reviewed 18 out of 39 changed files in this pull request and generated 1 comment.

Comments suppressed due to low confidence (2)

pbm/storage/mio/minio.go:1

• The hardcoded 60-second timeout should be configurable or defined as a constant to improve maintainability and allow for different timeout requirements.

package mio

pbm/storage/mio/minio.go:1

• The buffer size of 32KB should be defined as a named constant to improve code readability and maintainability.

package mio

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[Copilot]

Pull Request Overview

Copilot reviewed 18 out of 39 changed files in this pull request and generated 2 comments.

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