09-04-2018
Proliferate commands across nodes?
Hi folks.
I've been a developer for far too many years, but know very little of unix. I have setup a very inexpensive cluster of 6 raspberry pi nodes so I can play around with multi node programming. This is only for fun, but I want to learn properly, else what's the point?!
Setup can be a bit of a ball ache with proliferating code and commands.
Could you please suggest software that will allow me to send commands to node 1 and have that proliferated to the other 5? I have searched for this and found a few possibilities, most do a lot more than I need and the one that looks perfect (fabric) doesn't install in Raspbian, no idea why.
I'm sure I could write a bash with ssh and accomplish the basics, but I like the idea of asynchronous replies which I think is going to be a depth to far.
Any suggestions welcome, and if you have an opinion of one thing over another please let me know why.
Many thanks.
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LEARN ABOUT CENTOS
crmadmin
PACEMAKER(8) System Administration Utilities PACEMAKER(8)
NAME
Pacemaker - Part of the Pacemaker cluster resource manager
SYNOPSIS
crmadmin command [options]
DESCRIPTION
crmadmin - Development tool for performing some crmd-specific commands.
Likely to be replaced by crm_node in the future
OPTIONS
-?, --help
This text
-$, --version
Version information
-q, --quiet
Display only the essential query information
-V, --verbose
Increase debug output
Commands:
-i, --debug_inc=value
Increase the crmd's debug level on the specified host
-d, --debug_dec=value
Decrease the crmd's debug level on the specified host
-S, --status=value
Display the status of the specified node.
Result is the node's internal FSM state which can be useful for debugging
-D, --dc_lookup
Display the uname of the node co-ordinating the cluster.
This is an internal detail and is rarely useful to administrators except when deciding on which node to examine the logs.
-N, --nodes
Display the uname of all member nodes
-E, --election (Advanced) Start an election for the cluster co-ordinator
-K, --kill=value
(Advanced) Shut down the crmd (not the rest of the clusterstack ) on the specified node
Additional Options:
-t, --timeout=value
Time (in milliseconds) to wait before declaring the operation failed
-B, --bash-export
Create Bash export entries of the form 'export uname=uuid'
Notes:
The -i,-d,-K and -E commands are rarely used and may be removed in future versions.
AUTHOR
Written by Andrew Beekhof
REPORTING BUGS
Report bugs to pacemaker@oss.clusterlabs.org
Pacemaker 1.1.10-29.el7 June 2014 PACEMAKER(8)