Re: [Users] Small help regarding rhevm-shell scripting
Hi Anand,
On 09/05/2013 12:07 PM, Anand Nande wrote:
Hi Michael,
The plan is to have a automated backup solution which will daily backup the Vms
and stop-export-stop them automatically in RHEVM-3.2's rhevm-shell.
Having said that I am not sure : *How to use conditional statements like
if-else/for/while loops* *inside the**
**script file* *which is passed with the '-f' or '--file' option to
'rhevm-shell' ?*
Processing shell output is just like any text processing,
basically what you need is a simple bash script, that analyses the input
produced by something like [1] and invokes another script based on your
condition/s something like [2]:
[1]
list vms --show-all | grep -w 'name\|status' > list_vms
ovirt-shell -f list_vms
[2]
s1="..."
s2="..."
if [$s1 == $s2]
then
# invoke relevant script passing relevant parameters
fi
* in future versions (maybe even at 3.4) i plan adding additional cli
capabilities to the shell,
like invoking single command and printing the output to stdio what
will make possible writing a single bash script that invokes different
shell commands, but till then you can achieve the same via dedicated
scripts like list_vms/suspend_vms/export_vms (in my view its even better
from the code maintenance PoV)
If there is a way to do this, please let me know.
I would like to use this to check if :
- The VM is already present in the Export-Domain (?)
+If yes, remove the VM present in the export-domain and re-initiate the export op on
the new VM.
+else, Export the VM.
- After the above is complete, Check if the Export op is complete:
+If yes, Start the VM which is stopped.
+else, wait for Export to complete and once done, start the VM.
Having the above in a script, I can have the cron job scheduled to execute the script.
Waiting for your feedback.
Thanks
$Anand
--
Michael Pasternak
RedHat, ENG-Virtualization R&D