Support new CSP auth method for Wavefront (AOA)

[oppegard]

Please describe the feature request.

Wavefront has integrated into VMware's CSP authentication system, and the wavefront-sdk-java library has been updated to support that. We would like micrometer to support this additional authentication method in WavefrontMeterRegistry

Rationale

New Wavefront customers will be onboarded to CSP-only clusters, and the existing authentication method of WF API Token will not be available to them. To allow these customers to use micrometer for sending metrics to Wavefront, they'll need CSP authentication available.

Additional context

The release version of wavefront-sdk-java with these changes is 3.4.0.

There are two types of CSP authentication: server-to-server tokens and user-api-tokens. We envision the changes looking something like this:

• CSP User API Token

  • In WavefrontMeterRegistry, something like new WavefrontClient.Builder(getWavefrontReportingUri(config), config.cspApiToken()).useTokenForCSP()

• CSP Server to Server OAuth

  • In WavefrontMeterRegistry, something like new WavefrontClient.Builder(getWavefrontReportingUri(config), config.cspClientId(), config.cspClientSecret())
  • If an optional OrgID is provided, calling builder.cspOrgId(config.cspOrgId())

Note that CSP Authentication is only valid for Direct Ingestion scenarios (like DEFAULT_DIRECT in WavefrontConfig). It is not relevant for the DEFAULT_PROXY case.

Last, we've created a similar issue for Spring Boot: spring-projects/spring-boot#37165

Thank you!

– @oppegard and @warshawd

[shakuzen]

Until dedicated support for this is added, users can provide a customized WavefrontSender to the WavefrontMeterRegistery.builder(). For example:

WavefrontMeterRegistry meterRegistry = WavefrontMeterRegistry.builder(config)
    .wavefrontSender(WavefrontMeterRegistry.getDefaultSenderBuilder(config).useTokenForCSP().build())
    .build();

WavefrontMeterRegistry meterRegistry = WavefrontMeterRegistry.builder(config)
    .wavefrontSender(new WavefrontClient.Builder(getWavefrontReportingUri(config), cspClientId, cspClientSecret)
        .cspOrgId(cspOrgId)
        .build())
    .build();

[shakuzen]

Resolved by #4102. A new configuration method apiTokenType has been added to WavefrontConfig. This, in conjunction with the existing apiToken method, can be used to configure the new CSP auth method. See wavefrontHQ/wavefront-sdk-java#301 for more about the format to specify the token, especially when there are multiple parts.