connectivity: proposal for degraded connectivity behavior

[junr03]

Design an API for envoy to be aware of OS level signals (e.g connection to WiFi vs mobile network, app backgrounded) in order for envoy to react appropriately.

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[costinm]

+1 - include battery info as well if possible. All this would be very valuable on the control plane -
based on network type (metered, speed) and battery status it can push different configs.

As a proposal, a method "setMetadata" to update the bootstrap node.metadata, so the management
server can make decisions based on the current information. The method would just update the meta and do some update on the XDS to make sure the server gets the new status.

Technically it is possible to restart envoy with a different bootstrap config whenever the network or battery config changes.

Note that net config changes also result in new interfaces and IPs that envoy might need to bind to.

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This issue has been automatically marked as stale because it has not had activity in the last 30 days. It will be closed in the next 7 days unless it is tagged "help wanted" or other activity occurs. Thank you for your contributions.

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This issue has been automatically closed because it has not had activity in the last 37 days. If this issue is still valid, please ping a maintainer and ask them to label it as "help wanted". Thank you for your contributions.

[junr03]

Done in #442.