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Full Discussion: Bash script to add multiple resources to NFS pacemaker cluster
Top Forums Shell Programming and Scripting Bash script to add multiple resources to NFS pacemaker cluster Post 303037210 by hburnswell on Thursday 25th of July 2019 08:07:04 PM
Old 07-25-2019
Bash script to add multiple resources to NFS pacemaker cluster
All,

I'm looking for some guidance on how to accomplish automating the addition of exports to an HA Pacemaker NFS cluster. I would like to do it in bash for logistics reasons.

The resource creation command looks like this:

Code:
pcs resource create nfs-b2b-hg-media-10.1 exportfs clientspec=10.1.0.0/255.255.0.0 options=rw,sync,no_root_squash directory=/nfs/exports/media fsid=1 --group nfsgroup

However, I would like the script to be able to add multiple exports at one time and am trying to figure out the best way to do it. I have been playing around with arrays and can gather 2 of the necessary variables in the command, but there are 4 needed variables:

Code:
resource_name --> nfs-b2b-hg-media-10.1
clientspec --> 10.1.0.0/255.255.0.0
directory --> /nfs/exports/media
fsid --> 1

The rest of the command is pretty static.

Here is a small test script that gathers resource name and clientspec (and puts in order):

Code:
#!/usr/bin/bash

cs10168="10.16.8.0/255.255.255.0"
cs101="10.1.0.0/255.255.0.0"
cs1091="10.91.0.0/255.255.0.0"
dirs=(media hotdrive images)
nfsenv="nfs-b2b-hg"
nfsoptions="rw,sync,no_root_squash"
lv=exports
mt="/nfs"
nfsgrp=nfsgroup

declare -A exports
exports[${nfsenv}-${dirs[0]}-10.1]=${cs101}
exports[${nfsenv}-${dirs[1]}-10.91]=${cs1091}
exports[${nfsenv}-${dirs[2]}-10.1]=${cs101}
exports[${nfsenv}-${dirs[2]}-10.91]=${cs1091}

declare -a orders
orders+=( ${nfsenv}-${dirs[0]}-10.1 )
orders+=( ${nfsenv}-${dirs[1]}-10.91 )
orders+=( ${nfsenv}-${dirs[2]}-10.1 )
orders+=( ${nfsenv}-${dirs[2]}-10.91 )

for i in ${orders[@]}

do

       pcs resource create $i exportfs clientspec=${exports[$i]} options=$nfsoptions directory=${mt}/${lv}/${dirs[0]} fsid=1 --group $nfsgrp

done

As you can see there is a problem with how to define 'directory' and 'fsid'.

Does anyone have any suggestions on how to accomplish this in bash? Any guidance is greatly appreciated.

Thanks,

HB
Last edited by hicksd8; 07-26-2019 at 07:00 AM..
 

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LEARN ABOUT CENTOS

xdg-user-dirs-update

XDG-USER-DIRS-UPD(1)						   User Commands					      XDG-USER-DIRS-UPD(1)

NAME

       xdg-user-dirs-update - Update XDG user dir configuration

SYNOPSIS

       xdg-user-dirs-update [OPTION...] [--set NAME PATH...]

DESCRIPTION

       xdg-user-dirs-update updates the current state of the users user-dirs.dir. If none existed before then one is created based on the system
       default values, or falling back to the old non-translated filenames if such directories exists. The list of old directories used are:
       ~/Desktop, ~/Templates and ~/Public.

       If an old configuration exists it is updated with any new default directories. Additionally, any configured directories that point to
       non-existing locations are reset by pointing then to the users home directory. This typically happens when the users removed the directory,
       so they likely don't want to use it anymore.

       On the first run a user-dirs.locale file is created containing the locale that was used for the translation. This is used later by gui
       tools like xdg-user-dirs-gtk-update to detect if the locale was changed, letting you to migrate from the old names.

       xdg-user-dirs-update is normally run automatically at the start of a user session to update the XDG user dirs according to the users
       locale.

OPTIONS

       The following options are understood:

       --help
	   Print help output and exit.

       --force
	   Update existing user-dirs.dir, but force a full reset. This means: Don't reset nonexisting directories to HOME, rather recreate the
	   directory. Never use backwards compatible non-translated names. Always recreate user-dirs.locale.

       --dummy-output PATH
	   Write the configuration to PATH instead of the default configuration file. Also, no directories are created.

       --set NAME PATH
	   Sets the XDG user dir with the given name.

	   NAME should be one of the following:
	       DESKTOP
	       DOWNLOAD
	       TEMPLATES
	       PUBLICSHARE
	       DOCUMENTS
	       MUSIC
	       PICTURES
	       VIDEOS

	   PATH must be an absolute path, e.g.	$HOME/Some/Directory.

FILES

       The XDG user dirs configuration is stored in the user-dirs.dir file in the location pointed to by the XDG_CONFIG_HOME environment variable.

ENVIRONMENT

       The XDG_CONFIG_HOME environment variable determines where the user-dirs.dirs file is located.

SEE ALSO

       xdg-user-dir(1), user-dirs.dirs(5), user-dirs.defaults(5), user-dirs.conf(5).

XDG
															      XDG-USER-DIRS-UPD(1)
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