Creating a Boot Partition on Ubuntu
HyTrust requires a separate boot partition in which the HyTrust DataControl Policy Agent can be installed. How you do this depends on the version of Linux running on the server. For your convenience, the following section explains how to set up a separate boot partition on Ubuntu.
Important: | If /boot is already using a separate partition, do not follow this process. Instead, you should encrypt the existing /boot partition as described in Encrypting Linux System Devices. |
In the following example, the current Linux is installed on device /dev/sda
and the GRUB stage1 bootloader is also installed on /dev/sda
. This is a typical Linux installation. In addition, we have a new device named /dev/sdb
to hold the new boot partition, and we will create a partition on it using sfdisk
.
Note: | You can also use the fdisk or parted utilities to create an MBR partition on the disk /dev/sdb . The partition should be a DOS-compatible LINUX-type partition starting at sector 2048. The partition can cover the entire disk. |
# sfdisk -f -uS -D /dev/sdb << EOF 2048,,83,* EOF # partprobe
Find out the space required by the /boot
subtree:
# du -sh /boot
As a rule of thumb, the space provided for the new boot partition should be twice the space used by /boot
plus 100MB. Format the new partition with ext4
(ext3
is also fine), as follows:
# mkfs.ext4 /dev/sdb1
Copy the files from the /boot
directory to the new boot partition:
# mkdir -p /tmp/sdb1 # mount /dev/sdb1 /tmp/sdb1 # cp -a /boot/* /tmp/sdb1
Get the UUID of the new boot partition:
# blkid /dev/sdb1 # umount /tmp/sdb1
Add an entry to /etc/fstab
to mount the new boot partition:
UUID=<uuid> /boot ext4 rw 0 0
Mount the new /boot
:
# mount /boot
Install GRUB with boot files on the new boot partition, while the GRUB stage1 is copied to the current boot device, as follows:
# grub-install /dev/sda
Note that GRUB is being installed on /dev/sda
but the boot directory comes from /dev/sdb1
. Update your GRUB configuration to take this change into account:
# grub-mkconfig -o /boot/grub/grub.cfg
Your system is ready now, so reboot and confirm that all is well.
What to Do Next
Verify the configuration as described in Verifying the Current VM Configuration and then encrypt the boot disk as described in Encrypting Linux System Devices.