5

We need to be able to create a way to reboot virtual machines in the lab every 20 minutes automatically.

Is there any way this can be done in vSphere 5?

Mark Henderson
  • 68,823
  • 31
  • 180
  • 259
Ashish
  • 51
  • 1
  • 2
  • 4
    Can't you do that from system itself ? Like creating scheduled restart in windows/ cronjob in linux? Or it must be in lower lvl ? – Alan Apr 03 '12 at 05:23
  • 2
    No My Friend, Im Running vulnerable machine for metasploit practice. now ones that system exploit so it has to restart. i'm not available online all the time, so i want to manage something like automatically reboot my virtual machines in every 20 mints. – Ashish Apr 03 '12 at 05:38
  • 2
    Just a thought... have you considered the possibility that someone might escape the VM and take over the hypervisor? – Ladadadada Apr 03 '12 at 10:23
  • What is the reason for you to reboot an exploited machine? Do you mean *rebuild* a machine every 20 minutes? – Rilindo Apr 03 '12 at 13:05
  • @Rilindo If the exploit only resides in memory, than a reboot would fix. – JakeRobinson Apr 03 '12 at 19:46

3 Answers3

8

I don't have access to vSphere now but it should be like this:

  1. Go to scheduled task (Home->...)
  2. Create new task changing VM power state
  3. Select virtual machine
  4. Select power operation option "Reset"
  5. Select Frequently
  6. Finish

Alternatively You can use vSphere CLI :

http://pubs.vmware.com/vsphere-50/topic/com.vmware.vcli.examples.doc_50/cli_manage_vms.10.6.html

John Gardeniers
  • 27,458
  • 12
  • 55
  • 109
Alan
  • 403
  • 2
  • 11
  • I'm Running vulnerable machine for metasploit practice. And I Created a online lab so any one can join and play with that machines. now ones that system exploited, So i have to restart the system. i'm not available online all the time, so i want to manage something like automatically reboot my virtual machines in every 20 mints – Ashish Apr 03 '12 at 09:24
  • is that the same effect as hitting the reset button or issuing a reset command through the OS? – Mauro Apr 03 '12 at 09:25
  • 1
    ...I'm missing why the solution of resetting the machine isn't the same as resetting it periodically. Alternatively you should script a way to roll back the machine from snapshot every X minutes. Better than rebooting. – Bart Silverstrim Apr 03 '12 at 12:59
1

I would use a vSphere scheduled task for this, like Alan said.

  • "Power on": turns on the power
  • "Power off": turn off the power
  • "Shut down": tidy shutdown of the guest OS
  • "Suspend": tidy suspend of the guest OS
  • "Reset": power-cycle the guest (basically power-off then power-on)

In addition, I don't see any point in rebooting a broken machine, so you could also use non-persistent disks on it, so that when the VM reboots, it reverts back to a known good state. Otherwise rebooting a hacked machine just results in a hacked machine...

There is an obvious problem with a scheduled restart though: what happens if I connect to start testing my exploit at 13:59, and the restart is scheduled for 14:00?

Cylindric
  • 1,127
  • 5
  • 24
  • 45
0

Why don't you simply create a bat file

having code 

shutdown -r -f -t 1200000 ;

and create a schedule to execute it

Trikaldarshiii
  • 103
  • 3
  • This relies on the machine being up and running, though. Much better to get VMWare to do it. – Dan Apr 03 '12 at 09:21