moby / moby/libnetwork

Support running overlay networking on top of dynamic IP addresses

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Dominant language
Go
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Description

Work is underway in SwarmKit to support dynamic IP addresses for managers in the Raft implementation: https://github.com/docker/swarmkit/pull/1579

For dynamic IP addresses to be fully supported in SwarmKit, libnetwork will need to be updated to handle address changes in overlay networking.

This could support some interesting use-cases, like running swarm clusters of laptops attached to WiFi networks. Since developers often run these tools on their laptops, it would be very nice to support this use case smoothly.

cc @mrjana @mavenugo

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First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start by reading the linked SwarmKit PR #1579 and the libnetwork overlay-networking implementation. Identify where peer or manager addresses are stored and updated, then define how address changes should propagate through existing overlay state. Done means dynamic manager addresses remain usable without disrupting overlay networking, with tests covering address changes.

Written by the indexing model from the issue text.

Assessment

Tech stack
go
Domain
networking
Issue type
Feature
Difficulty
5/5
Estimated time
Over a week
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
20/100

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