SSH

It is easy to set up Dask on informally managed networks of machines using SSH. This can be done manually using SSH and the Dask command line interface, or automatically using either the SSHCluster Python command or the dask-ssh command line tool. This document describes both of these options.

Python Interface

Command Line

The convenience script dask-ssh opens several SSH connections to your target computers and initializes the network accordingly. You can give it a list of hostnames or IP addresses:

$ dask-ssh 192.168.0.1 192.168.0.2 192.168.0.3 192.168.0.4

Or you can use normal UNIX grouping:

$ dask-ssh 192.168.0.{1,2,3,4}

Or you can specify a hostfile that includes a list of hosts:

$ cat hostfile.txt
192.168.0.1
192.168.0.2
192.168.0.3
192.168.0.4

$ dask-ssh --hostfile hostfile.txt

The dask-ssh utility depends on the paramiko:

python -m pip install paramiko

Note

The command line documentation here may differ depending on your installed version. We recommend referring to the output of dask-ssh --help.