confluent/confluent_client/doc/man/nodeshell.ronn

nodeshell(8) -- Execute command on many nodes in a noderange through ssh
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## SYNOPSIS

`nodeshell <noderange> [options] <command to execute on each node>`

## DESCRIPTION

Allows execution of a command on many nodes in parallel.  Like noderun(8), it
accepts and interpolates confluent attribute expressions as documented in 
nodeattribexpressions(5).  `nodeshell` provides stdout as stdout and stderr
as stderr, unlike psh which combines all stdout and stderr into stdout.

## OPTIONS

* `-c`:
  Specify the maximum number of instances to run concurrently.

## EXAMPLES

* Running `echo hi` on for nodes:
  `# nodeshell n1-n4 echo hi`  
  `n1: hi`  
  `n2: hi`  
  `n3: hi`  
  `n4: hi`  

* Setting a new static ip address temporarily on secondary interface of four nodes:
  `# nodeshell n1-n4 ifconfig eth1 172.30.93.{n1}`

* If wanting to use literal {} in the command, they must be escaped by doubling:
  `# nodeshell n1-n4 "ps | awk '{{print $1}}'"`
  
## SEE ALSO

noderun(8)