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Top Forums UNIX for Beginners Questions & Answers Proliferate commands across nodes? Post 303022632 by MuntyScrunt on Tuesday 4th of September 2018 03:41:42 PM
Old 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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VOTEQUORUM_LEAVING(3)				    Corosync Cluster Engine Programmer's Manual 			     VOTEQUORUM_LEAVING(3)

NAME
votequorum_leaving - Tell other nodes that we are leaving the cluster SYNOPSIS
#include <corosync/votequorum.h> int votequorum_leaving(votequorum_handle_t handle); DESCRIPTION
The votequorum_leaving function is used to tell the other nodes in the cluster that this node is leaving. They will (when the node actually leaves) reduce quorum to keep the cluster running without this node. This function should only be called if it is known that the node is being shut down for a known reason and could be out of the cluster for an extended period of time. Normal behaviour is for the cluster to reduce the total number of votes, but NOT expected_votes when a node leave the cluster, so the clus- ter could become inquorate. This is correct behaviour and is ther eto prevent split-brain. Do NOT call this function unless you know what you are doing. RETURN VALUE
This call returns the CS_OK value if successful, otherwise an error is returned. ERRORS
The errors are undocumented. SEE ALSO
votequorum_overview(8), votequorum_initialize(3), votequorum_finalize(3), votequorum_dispatch(3), votequorum_fd_get(3), corosync Man Page 2009-01-26 VOTEQUORUM_LEAVING(3)
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