Cannot attach to geth node running inside container

Question

I am trying to run a node inside a docker container.

I am able to run a geth node locally, and attach it via IPC with these simple commands:

geth --fast --cache=512 Then geth attach, it works fine.

Then I run a docker container (ethereum/client-go) with the same parameter, volume mounted on same ethereum folder.

Docker command:

docker run -d --name ethereum-node -v /Users/****/Library/Ethereum:/root/.ethereum -p 8545:8545 -p 30303:30303 ethereum/client-go --fast --cache=512

The geth.ipc file is present, but I cannot attach. $ geth attach Fatal: Unable to attach to remote geth: dial unix /Users/****/Library/Ethereum/geth.ipc: connect: connection refused

I tried to read/write geth.ipc:

• When geth is run locally: $ cat geth.ipc {"jsonrpc":"2.0","error":{"code":-32600,"message":"EOF"}}
• When under container : $ cat geth.ipc cat: geth.ipc: Connection refused

Running OSX 10.12.1, docker 1.12.3

Answer 1

$ docker exec -it ethereum-node /geth attach ipc://root/.ethereum/devchain/geth.ipc

Try to use this command if it works. Maybe you should change geth.ipc path in the command.

Answer 2

Perhaps you should try

geth attach http://localhost:8545

The default geth console connectivity is via IPC which requires access to geth.ipc file handler.