Tenant management and authentication

[chunshao90]

Describe This Problem

Tenant management and authentication.

Proposal

Simple solution

• config files, something like

[server.auth]
enable = true
# available values: file/ceresmeta
source = "file"

[server.auth.file]
username = "admin"
password = "secret-token"

Complex

• ceresmeta supports creating tenants and generating tokens.
• ceresdb supports identity verification.

Additional Context

No response

[jiacai2050]

Besides store tenants in ceresmeta, we should also support this via config files

• Support password setting / 支持设置密码 #1016 (comment)

[jiacai2050]

https://www.postgresql.org/docs/current/sql-createrole.html

PG will store password according to https://www.postgresql.org/docs/current/runtime-config-connection.html#GUC-PASSWORD-ENCRYPTION, and users can't get original password.

[jiacai2050]

For gRPC, we can use Bearer auth

• https://github.com/hyperium/tonic/blob/master/examples/src/authentication/client.rs