DHT Get Value not working because nodes aren’t found

[govi218]

I have a 4 node setup: relay node, sender node, receiver node and storage node. Sender connects to storage through relay node and passes data through a stream, and the storage node calls IpfsDHT.PutValue() to store that data. Receiver connects to relay node and calls IpfsDHT.GetValue()using the same key as the sender (exchanged out of band). However, I keep getting a routing: not found error. Refreshing the DHT does not affect anything.
Further, calling IpfsDHT.FindPeer from the relay node on itself yields nothing (not even its own ID). However, the relay node’s Peerstore has the IDs of all nodes involved.
How can I make the IpfsDHT.GetValue() function to work?

[Stebalien]

I assume you're using the latest release, 0.6.2? We've made some changes and are still working on updating the documentation and ironing out some kinks.

In the latest release, DHT nodes won't become DHT servers until they determine that they're directly reachable from the public internet. That way, unreachable nodes behind NATs don't end up harming the public DHT.

Obviously, this doesn't work well in a private network situation. The simple solution for now is to pass dht.Mode(dht.ModeServer) to dht.New(...) when you construct the DHT. We're working on a better solution so this should go back to working by default.

[willscott]

in #570, we added a dual DHT wrapper for the split-wan-lan DHT behavior that hopefully works well in general purpose IPFS use. See if using that wrapper also works for you

I can take a look at seeing if there's a good go-libp2p-examples I can add for the dual-DHT wrapper.

[willscott]

Tracking remaining work in libp2p/go-libp2p-examples#156