IDP endpoints support in JuiceFS Gateway

[stevapple]

What would you like to be added:

Add a set of IDP (Identity Provider) APIs that replaces (deprecates) the current policy admin and LDAP admin APIs to JuiceFS Gateway.

Why is this needed:

Newer versions of mc uses a new set of IDP APIs for managing policies and LDAP. JuiceFS Gateway didn't support these APIs at the moment, making it incompatible with the latest clients.

For more information, see:

• https://min.io/docs/minio/linux/reference/minio-mc/mc-idp-ldap.html
• https://min.io/docs/minio/linux/reference/minio-mc-admin/mc-admin-policy.html

[zhijian-pro]

https://juicefs.com/docs/community/guide/gateway/#use-the-minio-client
In fact, we only recommend using the client of version RELEASE.2021-04-22T17-40-00Z for interaction with juicefs gateway.

[stevapple]

In fact, we only recommend using the client of version RELEASE.2021-04-22T17-40-00Z for interaction with juicefs gateway.

This is some kind of nice-to-have feature, and I'm willing to help out. We would like to see the gateway gaining feature parity with a regular MinIO server eventually, but IDP is one of the top requirements on our list.

[zhijian-pro]

Welcome PR