Add MacOS Support

[dblock]

Coming from opensearch-project/opensearch-plugins#96, add MacOS (Darwin) support.

• Passing CI on MacOS
• Documentation

[navneet1v]

The mac os support is present in K-NN. Resolving this issue

[peterzhuamazon]

Hi @navneet1v @jmazanec15 @navneet1v ,

Could you let me know if k-NN now fully support build and run on both x64 and arm64 macOS?

Thanks.

[jmazanec15]

@peterzhuamazon We have CI working for mac https://github.com/opensearch-project/k-NN/blob/main/.github/workflows/CI.yml#L95-L134. I believe this will run with arm64. Locally, k-NN is able to build on x86.

[peterzhuamazon]

Thanks @jmazanec15 seems like it is ready to go 👍

[arg]

Sorry for this naive question, but what will be the next steps to make kNN work for MacOS users? I just tried it with OpenSearch 2.17.1 installed on arm64 MacOS and it still throws me an error:

{
  "error": {
    "root_cause": [
      {
        "type": "illegal_argument_exception",
        "reason": "unknown setting [index.knn] please check that any required plugins are installed, or check the breaking changes documentation for removed settings"
      }
    ],
    "type": "illegal_argument_exception",
    "reason": "unknown setting [index.knn] please check that any required plugins are installed, or check the breaking changes documentation for removed settings",
    "suppressed": [
      {
        "type": "illegal_argument_exception",
        "reason": "unknown setting [index.knn.algo_param.ef_construction] please check that any required plugins are installed, or check the breaking changes documentation for removed settings"
      },
      {
        "type": "illegal_argument_exception",
        "reason": "unknown setting [index.knn.algo_param.ef_search] please check that any required plugins are installed, or check the breaking changes documentation for removed settings"
      },
      {
        "type": "illegal_argument_exception",
        "reason": "unknown setting [index.knn.algo_param.m] please check that any required plugins are installed, or check the breaking changes documentation for removed settings"
      },
      {
        "type": "illegal_argument_exception",
        "reason": "unknown setting [index.knn.space_type] please check that any required plugins are installed, or check the breaking changes documentation for removed settings"
      }
    ]
  },
  "status": 400
}