3.1.2 Matrix Server Upgrade Guide

Appendix A: Install the RHEL4 Operating System and Kernel 66

5. Run mkinitrd If Necessary

If you edited the /etc/modprobe.conf file in the previous step, you will need

to run mkinitrd to create a new initrd image with the appropriate drivers.

1. Check the /boot directory for an initrd image for the kernel you just

installed. Remove the image if it exists in the directory.

2. Run the following command from the /usr/src/linux-2.6 directory:

# mkinitrd <initrd-image> <kernel-version>

For more information, see the mkinitrd(8) man page.

6. Reboot and Verify the Kernel Configuration

Reboot the operating system and then verify that the kernel is built and

configured correctly.

Workaround for SELinux

SELinux is enabled by default in RHEL4 Update 2. Because SELinux does

not know which security policy to use for the PSFS filesystem, it will

cause mounts of the PSFS filesystem made via the PolyServe

Management Console or mx commands to fail.

To work around this problem, Matrix Server takes the following steps

when it is installed:

1. Adds a psfs policy line to the following file:

/etc/selinux/targeted/src/policy/genfs_contexts

2. Rebuilds the binary policy file and installs it in:

/etc/selinux/targeted/policy/policy.*

3. Reloads the kernel with the new policy information.

If you modify SELinux and the psfs policy implemented by Matrix Server

no longer works, you will need to make changes similar to the above to

allow PSFS filesystems to be mounted.