Unified Configuration Management System

[anthony-murphy]

Feature

Currently the framework lacks a unified configuration management system. Many of our layers take an options bag which allows some level of configuration however this system is lacking, as it often requires a code change to change configuration values. This serves us ok for things like testing but works less well for deployed applications where ideally config is easier to change than code.

Some properties that such should provide:

• Enable onetime overrides for dev testing debugging, and protect from unintentional spread.
• Configuration values should be immutable. once read in a session they should not change, as configs that can change increases complexity of consuming code.
• Developers should be able to easily hook into such a system to manage deployed resources
• Ideally configurations should continue to be strongly typed in the runtime
• The config system itself should be low overhead in terms of performance

[anthony-murphy]

Some experimentation: #5691

[anthony-murphy]

One option i'd considered in tying this into our logging system, so the logger also supports configuration management. The benefits is that this is already something that can be injected, and the code is already instrumented for it. However it does feel like it doesn't quite belong and is outside the abstraction the logger is meant to provide

[anthony-murphy]

releate to #5783

[anthony-murphy]

another set of experiments: main...anthony-murphy:config-provider

also @andre4i

[anthony-murphy]

fyi @nmsimons

[anthony-murphy]

adhoc localstorage config:

• https://github.com/microsoft/FluidFramework/blob/913b9425af118f30d9f83742293cdfa8f655c768/packages/runtime/container-runtime/src/localStorageFeatureGates.ts
• https://github.com/microsoft/FluidFramework/blob/d14bf05dfc0601dc1c818c61195fa92ec66699de/packages/drivers/odsp-driver/src/odspSummaryUploadManager.ts
• https://github.com/microsoft/FluidFramework/blob/f4eb5c07904be5bec3d8de011b2e7a87211dd248/packages/loader/driver-utils/src/blobAggregationStorage.ts
• https://github.com/microsoft/FluidFramework/blob/3ca7408d2457e68faf82815ff737c5bfdeade7f8/packages/drivers/odsp-driver/src/odspDocumentService.ts
• https://github.com/microsoft/FluidFramework/blob/0d53c3586c66a2536ab9ed7f235a892f6e62288c/packages/drivers/driver-base/src/documentDeltaConnection.ts