Difference between revisions of "Modifying the Init Image"
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==Modifying the Boot Image== | ==Modifying the Boot Image== | ||
| − | If you wish to modify the way that the pxe/tftp works files | + | If you wish to modify the way that the pxe/tftp works init files can be edited - run '''as root''' to be able to loop mount: |
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<pre> | <pre> | ||
| − | cd / | + | cd ~ |
| − | + | cp /var/www/html/fog/service/ipxe/init.xz . | |
| − | mkdir initmountdir | + | xz -d init.xz |
| + | mkdir -p initmountdir | ||
mount -o loop init initmountdir | mount -o loop init initmountdir | ||
</pre> | </pre> | ||
| − | After you're done making changes, you have to | + | Now you find the uncompressed content of the initrd in <tt>~/initmountdir</tt> and can make adjustments as needed. After you're done making changes, you have to unmount, re-compress and copy back the init image: |
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<pre> | <pre> | ||
| − | cd /var/www/ | + | cd ~ |
| − | + | umount initmountdir | |
| − | + | xz -C crc32 -9 init | |
| − | + | cp init.xz /var/www/html/fog/service/ipxe/ | |
</pre> | </pre> | ||
| − | + | You want to apply the same changes to the 32-bit init file as well! Follow the same steps outlined above but using the filename <tt>init_32.xz</tt> instead. | |
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| − | xz | ||
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==Examples== | ==Examples== | ||
Latest revision as of 10:45, 18 December 2020
Contents
Modifying the Boot Image
If you wish to modify the way that the pxe/tftp works init files can be edited - run as root to be able to loop mount:
cd ~ cp /var/www/html/fog/service/ipxe/init.xz . xz -d init.xz mkdir -p initmountdir mount -o loop init initmountdir
Now you find the uncompressed content of the initrd in ~/initmountdir and can make adjustments as needed. After you're done making changes, you have to unmount, re-compress and copy back the init image:
cd ~ umount initmountdir xz -C crc32 -9 init cp init.xz /var/www/html/fog/service/ipxe/
You want to apply the same changes to the 32-bit init file as well! Follow the same steps outlined above but using the filename init_32.xz instead.
Examples
Adding sfdisk to the /sbin directory
This will add the sfdisk program into the boot environment:
cd /tftpboot/fog/images gunzip init.gz mkdir initmountdir mount -o loop init initmountdirinit is now ready for modification. Make your changes:
cp /sbin/sfdisk /tftpboot/fog/images/initmountdir/sbinModifications Complete. Unmount and re-gzip it:
umount initmountdir rmdir initmountdir gzip initNow you can use the sfdisk program from the PXE environment.
Remove Authentication from Quick Image
This example will show how to automatically authenticate users when they select Quick Image. If you are happy to allow anybody to deploy an image to a hardrive this is for you.
cd /tftpboot/fog/images gunzip init.gz mkdir initmountdir mount -o loop init initmountdir cd /tftpboot/fog/images/initmountdir/bin/
Edit fog.quickimage
Comment out the followig lines by putting a # in front
#echo " Enter a valid FOG username and password."; #echo ""; #echo -n " Username: "; #read username; #echo "" #echo -n " Password: "; #stty -echo #read password; #stty echo; #echo ""; #echo ""
Replace with:
username="a valid username" password="a valid password";Save the modification
cd ../.. umount initmountdir/ rmdir initmountdir gzip init
You are done and now users can image without the need for a username and a password.
