[cmd/opampsupervisor] Persist sections of Collector's effective config

[evan-bradley]

Component(s)

No response

Is your feature request related to a problem? Please describe.

OpAMP offers the AgentRemoteConfig and ConnectionSettings messages to help create an effective configuration to give to the Collector. The Supervisor needs to persist these to allow the effective config to be composed on startup even if the OpAMP server doesn't send a message containing these configs.

Describe the solution you'd like

Persist the configs contained in the AgentRemoteConfig and ConnectionSettings messages to be used on startup before any messages have been received from the OpAMP server. If the capability corresponding to the message for the config is disabled, ensure the config is not merged into the Collector's effective configuration.

Describe alternatives you've considered

No response

Additional context

No response

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[srikanthccv]

The Supervisor needs to persist these to allow the effective config to be composed on startup even if the OpAMP server doesn't send a message containing these configs.

Persist the configs contained in the AgentRemoteConfig and ConnectionSettings messages to be used on startup before any messages have been received from the OpAMP server.

I want to pick this up. @evan-bradley some clarifying questions, I can see the need to persist the config when Server offers a new remote config or connection settings, but what does it mean to persist configs in AgentRemoteConfig and ConnectionSettings before receiving any message from Server? What does that persisted config contain?

[evan-bradley]

what does it mean to persist configs in AgentRemoteConfig and ConnectionSettings before receiving any message from Server? What does that persisted config contain?

Sorry, maybe I could have phrased it a little differently. We want to persist those messages upon receiving them, then if the Supervisor is restarted, use the previously persisted config fragments to start the Collector on Supervisor startup, so the Collector is started even if a message hasn't been yet received from the OpAMP server.