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58 lines
1.9 KiB
Markdown
58 lines
1.9 KiB
Markdown
nodeshell(8) -- Execute command on many nodes in a noderange through ssh
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=========================================================================
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## SYNOPSIS
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`nodeshell [options] <noderange> <command to execute on each node>`
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## DESCRIPTION
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Allows execution of a command on many nodes in parallel. Like noderun(8), it
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accepts and interpolates confluent attribute expressions as documented in
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nodeattribexpressions(5). `nodeshell` provides stdout as stdout and stderr
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as stderr, unlike psh which combines all stdout and stderr into stdout.
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## OPTIONS
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* `-c COUNT`, `-f COUNT`, `--count=COUNT`
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Specify the maximum number of instances to run concurrently
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* `-l LOGINNAME`, `--loginname=LOGINNAME`
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Username to use when connecting, defaults to current user.
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* `-m MAXNODES`, `--maxnodes=MAXNODES`
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Specify a maximum number of nodes to run remote ssh command to, prompting
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if over the threshold
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* `-n`, `--nonodeprefix`
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Do not prefix output with node names
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* `-p PORT`, `--port=PORT`
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Specify a custom port for ssh
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* `-s SUBSTITUTION`, `--substitutename=SUBSTITITUTION`
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Specify a substitution name instead of the nodename. If no {} are in the substitution,
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it is considered to be an append. For example, '-s -ib' would produce 'node1-ib' from 'node1'.
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Full expression syntax is supported, in which case the substitution is considered to be the entire
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new name. {node}-ib would be equivalent to -ib. For example, nodeshell -s {bmc} node1
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would ssh to the BMC instead of the node.
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## EXAMPLES
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* Running `echo hi` on for nodes:
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`# nodeshell n1-n4 echo hi`
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`n1: hi`
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`n2: hi`
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`n3: hi`
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`n4: hi`
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* Setting a new static ip address temporarily on secondary interface of four nodes:
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`# nodeshell n1-n4 ifconfig eth1 172.30.93.{n1}`
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* If wanting to use literal {} in the command, they must be escaped by doubling:
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`# nodeshell n1-n4 "ps | awk '{{print $1}}'"`
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## SEE ALSO
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noderun(8)
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