Docker DNS Limeted list of extenal dns servers
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- Dominant language
- Go
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Description
Feature Request
Current docker embedded DNS uses hardcoded:
maxExtDNS = 3 //max number of external servers to try
In our company we use 4 DNSservers and thus don't cover all out fail over scenario's. It would be nice if we can make maxExtDNS configurable
https://github.com/docker/libnetwork/blob/master/resolver.go#L68
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First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Start with resolver.go at the referenced maxExtDNS definition and trace how external DNS servers are selected. Determine where this limit can be configured, then verify that the resulting behavior permits four external DNS servers for the reported failover scenario.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- go
- Domain
- networking
- Issue type
- Feature
- Difficulty
- 3/5
- Estimated time
- 1-2 days
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 42/100