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[cmd/opampsupervisor] Persist sections of Collector's effective config #21078

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Tracked by #24327
evan-bradley opened this issue Apr 19, 2023 · 3 comments
Open
Tracked by #24327
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cmd/opampsupervisor enhancement New feature or request never stale Issues marked with this label will be never staled and automatically removed

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@evan-bradley
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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

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@evan-bradley evan-bradley added the enhancement New feature or request label Apr 19, 2023
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This issue has been inactive for 60 days. It will be closed in 60 days if there is no activity. To ping code owners by adding a component label, see Adding Labels via Comments, or if you are unsure of which component this issue relates to, please ping @open-telemetry/collector-contrib-triagers. If this issue is still relevant, please ping the code owners or leave a comment explaining why it is still relevant. Otherwise, please close it.

@github-actions github-actions bot added the Stale label Jun 19, 2023
@mwear mwear removed the Stale label Jun 21, 2023
@evan-bradley evan-bradley added the never stale Issues marked with this label will be never staled and automatically removed label Jul 17, 2023
@srikanthccv
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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
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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.

evan-bradley pushed a commit that referenced this issue Apr 23, 2024
#30807)

…tings

**Description:** <Describe what has changed.>
Persists 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, then the config
is not merged into the Collector's effective configuration

**Link to tracking Issue:** Part of
#21078

**Testing:**

Added e2e test

**Documentation:** <Describe the documentation added.>
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@mwear @evan-bradley @srikanthccv and others