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Re: Host groups
From: |
Ole Tange |
Subject: |
Re: Host groups |
Date: |
Thu, 13 Nov 2014 21:47:44 +0100 |
On Sat, Aug 30, 2014 at 12:22 PM, Ole Tange <tange@gnu.org> wrote:
> I have had people ask for hostgroups, so you could do:
>
> parallel --nonall -S @webservers uptime
>
> or similar.
This is now implemented. It works this way:
The sshlogins can now be prepended with hostgroups:
@group/sshlogin
@group+group/sshlogin
Example:
@web/www1
@web/webuser@www2
@web+db/www3
@db/db1.example.com
If one of the entries _only_ has a group (i.e. no sshlogin), then this
hosts from this group will used. A host can be in multiple groups.
It can be given on the command line:
parallel --nonall -S @web -S @web/www1 -S @db/db1.example.com hostname
but it is more likely that you will have a list of hostsgroups
(similar to the list above) in ~/.parallel/sshloginfile and then you
can do:
parallel --nonall -S @web -S .. hostname
It would be great if you would read through the manual and see if the
explanation is good enough.
/Ole
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