clusterctl exec
clusterctl exec
clusterctl exec
Run one command on many nodes at once
Synopsis
Run a command on every node of a set, in parallel.
The argument vector is quoted once and reassembled by the remote shell, so it arrives exactly as it was typed. A timeout is enforced on the node with timeout(1), because killing the local ssh would leave the remote process running.
clusterctl exec -n @idle – uptime clusterctl exec -n exe[1-10] –dedup – uname -r clusterctl exec -n exe[1-4] –script ‘systemctl is-active slurmd || journalctl -u slurmd -n 5’
With –dedup the nodes that answered the same thing are collapsed into one block, which turns a thousand replies into the few worth reading.
clusterctl exec [-n NODESET] -- COMMAND... [flags]Options
--confirm ask before running, as the destructive commands do
-b, --dedup collapse nodes that answered the same thing
-h, --help help for exec
-r, --root run as root
--script string shell program to run instead of a command
--stdin read standard input once and send it to every node
--timeout duration how long the command may run on a node (default: from the configuration)
-u, --user string remote account to run asOptions inherited from parent commands
--config strings configuration file or directory to read, repeatable (default: CLUSTERCTL_CONFIG or the search path)
--context string context to act on (default: the current one)
--dry-run report what would be done and change nothing
--fanout int how many hosts to work on at once (default: from the configuration)
--force allow protected hosts to be touched
-n, --nodes string node set to act on, for example 'exe[1-10],@idle'
-o, --output string output format: table, wide, json, yaml, nodeset, name, jsonpath=, jq= (default "table")
--set stringArray override one configuration value as PATH=VALUE, repeatable
-y, --yes answer the confirmation prompts with yesSEE ALSO
- clusterctl - Administer HPC clusters from one binary