Octopus is a commandline tool for running the same command on multiple remote hosts in parallel.
Octopus is a simple tool inspired by pdsh's ability to execute commands on multiple hosts in
parallel. In environments where pdsh cannot be installed, Go's ability to produce static binaries
is useful; thus, Octopus is written in Go. As long as one has the ability to scp or rsync files
to a host, a static octopus executable can be copied to it. A host may be a cluster admin node,
for example.
Octopus can execute arbitrary commands on multiple hosts in parallel, and hosts are grouped together
into "host groups" in a file which inspired by pdsh's "genders" file. The host groups file for
Octopus is actually a Bash file with groups defined by variable definitions. A file which defines
host groups as Bash variables was chosen so that so that the same file may be used easily by both
Octopus and by user-made scripts.
See octopus [--help|-h] for command usage.
An example host groups file can be found in the config directory.