Provision with Script

zfeng

@george1421 Thing is getting more clear. However, I still need some help. The reason why I need run script every time after I provision the computer is because with different computer I need to download different stuff for the different computer. Let’s say that I have computerA and computerB that I need to provision. How can I possibly specify argument with script, such as, Computer=ComputerA ./script.sh on the home directory?

zfeng

@Junkhacker can I run that on the home directory after the computer finishes provisioning? Thanks for jumping in

Junkhacker

@zfeng variables such as the host name are available for use scripting within FOS. this info comes from the host’s profile that gets created when you register a host with FOG.

Junkhacker

@zfeng if you give some more info on what the script is actually doing, we might be able to help you find the best solution faster

zfeng

@Junkhacker hostname is part of the script. I also need to do something else such as downloading a particular file with specific variable passed from the argument

Junkhacker

@zfeng this is very vague

zfeng

@Junkhacker the script will install different projects from git repository. everyone of the them needs to have an argument to install specific package on the computer.

For now, after I complete the provision part, I basically power up the computer and run Computer=ComputerA ./start.sh on the home directory.

zfeng

@Junkhacker I am sorry for not specific enough

Tom Elliott

@zfeng I’m guessing the image is Linux based?

zfeng

@Tom-Elliott Yes. You guys are very responsive. I appreciate that

Junkhacker

@zfeng it sounds like George’s method of creating a file in /etc/init.d on the target disk would work well for you. you can find info on creating postdownload scripts by searching on the forums

zfeng

@Junkhacker but how can I pass the argument to that script?

Tom Elliott

@zfeng so if you use post download script you could auto set your start script to have the host name preset

Junkhacker

@zfeng you could do something like wget -o /root/script.sh <address>/script.sh; echo “Computer=$hostname /root/script.sh” > <drive mount point>/etc/init.d/oneshot.sh

something like that.

zfeng

@Tom-Elliott The best thing I can do now is to try out that, and see what comes. Let’s say I need provision a linux computer with script Computer=ComputerA ./start.sh on the home directory. Is there any instruction I can try that out?

zfeng

@Junkhacker where should I specify wget -o /root/script.sh <address>/script.sh; echo “Computer=$hostname /root/script.sh” > <drive mount point>/etc/init.d/oneshot.sh command?

Junkhacker

@zfeng in a postdownload script, so that it will run when the imaging process completes but before the imaging task completes

george1421

If you search the tutorials FOG forum I have several on creating postdown scipts to install model specific drivers (for windows). The concepts are the same for what you want to do. You will just mount the target computer’s linux root volume. https://forums.fogproject.org/topic/11126/using-fog-postinstall-scripts-for-windows-driver-injection-2017-ed

https://forums.fogproject.org/topic/9463/fog-postinit-scripts-before-the-magic-begins

and from here: https://forums.fogproject.org/topic/7740/the-magical-mystical-fog-post-download-script/4

These are the list of FOG variables that are available to postdownload scripts.

shutdown	# Shut down at the end of imaging
hostdesc	#Host Description from Host Managment-General
hostip		# IP address of the FOS client
hostimageid	# ID of image being deployed
hostbuilding	# ??
hostusead	# Join Domain after image task from Host Management-Active Directory
hostaddomain	# Domain name from Host Management-Active Directory
hostaduser	# Domain Username from Host Management-Active Directory
hostadou	# Organizational Unit from Host Management-Active Directory
hostproductkey=	# Host Product Key from Host Management-Active Directory
imagename	# Image Name from Image Management-General
imagedesc	# Image Description from Image Management-General
imageosid	# Operating System from Image Management-General
imagepath	# Image Path from Image Management-General (/images/ assumed)
primaryuser	# Primary User from Host Management-Inventory
othertag	# Other Tag #1 User from Host Management-Inventory
othertag1	# Other Tag #2 from Host Management-Inventory
sysman		# System Manufacturer from Host Management-Inventory (from SMBIOS)
sysproduct	# System Product from Host Management-Inventory (from SMBIOS)
sysserial	# System Serial Number from Host Management-Inventory (from SMBIOS)
mbman		# Motherboard Manufacturer from Host Management-Inventory (from SMBIOS)
mbserial	# Motherboard Serial Number from Host Management-Inventory (from SMBIOS)
mbasset		# Motherboard Asset Tag from Host Management-Inventory (from SMBIOS)
mbproductname	# Motherboard Product Name from Host Management-Inventory (from SMBIOS)
caseman		# Chassis Manufacturer from Host Management-Inventory (from SMBIOS)
caseserial	# Chassis Serial from Host Management-Inventory (from SMBIOS)
caseasset	# Chassis Asset from Host Management-Inventory (from SMBIOS)
location	# Host Location (name) from Host Management-General

george1421

So you might ask how would you even begin to debug and/or write one of these scripts?

Simple you would go in a create your own bash script in /images/postinstall directory call it something like fog.aws or what ever in there create a simple bash script like

#!/bin/bash

echo "debug my custom script here. Press Ctrl-C to exit now";
debugPause;

Link that script into the master fog.postdownload script. And then schedule a deployment. Before you hit the schedule task button, tick the debug check box. Then pxe boot the target computer. After a few screens of text where you need to clear with the enter key you will be dropped to the FOS Linux command prompt in debug mode. Key in fog to start the master fog script. The master fog script will stop at each break point waiting for you to press the enter key to move to the next debugPause statement. When you see the message you created in your fog.aws script, hit ctrl-C and exit out of the FOG installer script. At this point you will be where your post install script should run. Now you can start developing your post install actions. The fog post install script should be in /images/postinstall on the FOS Linux target computer you can edit with vi or what ever else is on FOS Linux. You can mount the disk partitions all of the contents of the disk image should be on the target computer by now.

zfeng

@george1421 Thanks for that. I will try that out

Provision with Script

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