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I have an Ethereum node on a Amazon AWS instance. When I clone my node, it will generate with the same enode-ID. When both machine try to connect to peers, they get race each other, so one of them able to connect to peers but other cannot.

[Q] How could I change my enodeID on using geth?

Solution for Parity node:

Changing or removing the network key changes the enode address:

~/.local/share/io.parity.ethereum/network/key You could increment the value by one or generate a new one or remove it and parity will take care of that.

I don't know how to do this approach on geth.

  • As long as they're both running on a different IP address / port their enode IDs will be unique - or have I misunderstood your question? – TC8 Mar 20 '18 at 17:32
  • They are not. First nodeA initialized the genesis block and sync the blockchain. later when I clone that nodeA into nodeB, nodeB has the same enodeID. @TC8 – alper Mar 20 '18 at 17:43
  • here's an example enode ID: enode://6f8a80d14311c39f35f516fa664deaaaa13e85b2f7493f37f6144d86991ec012937307647bd3b9a82abe2974e1407241d54947bbb39763a4cac9f77166ad92a0@10.3.58.6:30303?discport=30301 i.e. a hexadecimal ID followed by an IP address and port number. If you run two nodes you'll need them on distinct IP/port combinations or they won't work properly. By changing the port number of one of them you won't change the hexadecimal part of the enode string but you will change the port numbers at the end, which should be all you need to avoid conflict – TC8 Mar 20 '18 at 17:47
  • You didn't understand my question I guess. Both have different IP and Port, but both has same initialization. When I clone a node , its node's enode-ID is not updated. @TC8 – alper Mar 20 '18 at 17:49
  • I understood the question but my idea for the solution must be wrong so please feel free to ignore me :) – TC8 Mar 20 '18 at 17:50
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By default, Geth's key file is: ~/.ethereum/geth/nodekey for Linux Library/Ethereum/geth/nodekey for Mac

More details can be found in geth source code here for the definition:

datadirPrivateKey = "nodekey" // Path within the datadir to the node's private key

And this line for path resolution.

  • Should I delete ~/.ethereum/geth/nodekey ? @Linmao Song – alper Mar 28 '18 at 11:12
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    Yes, if you delete it and restart geth, it will generate a new one – Linmao Song Mar 28 '18 at 11:37

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