VMware guest

Locating kernel headers for vmware tools on an uekr3 oracle linux 6.7

Continuing, if you like, on an admin topic concerning UEKR3 Oracle Linux 6.5, see: Missing kernel-firmware 3.8.13-16.2.1.el6uek on Oracle Linux 6.5, I’ going to give a recipe and some explanations for getting vmtools modules successfully built in a VMware guest after complains about an invalid kernel header path.
Immediately after installing vmtools in a VMware guest, usually using /vmware-tools-distrib/vmware-install.pl, another script, usually /vmware-tools-distrib/bin/vmware-config-tools.pl comes up, asking whether you want to configure vmtools just now. Configuration essentially comprises the opt-in/out of functionality as well as building and integration of kernel modules into the running kernel. Iff you furthermore run a recent UEKR3 kernel without the according development packages, the console output may read like this:

Before you can compile modules, you need to have the following installed... 
kernel headers of the running kernel

Search in repoquery --list kernel-uek-devel-3.8.13-68.3.5.el6uek.x86_64 for GCC...
Detected GCC binary at "/usr/bin/gcc".
The path "/usr/bin/gcc" appears to be a valid path to the gcc binary.
Would you like to change it? [no] 

Searching for a valid kernel header path...
The path "" is not a valid path to the 3.8.13-68.3.5.el6uek.x86_64 kernel headers.
Would you like to change it? [yes] y

Enter the path to the kernel header files for the 3.8.13-68.3.5.el6uek.x86_64 kernel

The path "/usr/include/linux" is not a valid path to the 3.8.13-68.3.5.el6uek.x86_64 kernel headers.
Would you like to change it? [yes] n

WARNING: This program cannot compile any modules for the following reason(s)...

- This program could not find a valid path to the kernel headers of the running
kernel.  Please ensure that the header files for the running kernel are 
installed on this sytem.

[ Press Enter key to continue ] 

What actually happens here is quite simple but however also expressed in a misleading way such that she/he may just suppose, installing the kernel headers will fix the problem (I even tried this /usr/include/linux thing, as of the old days, won’t work you see, is none of uekr3 anyway).


Installing Oracle Linux 6.5 plus Unbreakable Enterprise Kernel (UEK) into a VMware Guest

The readme for media pack B75461-01, aka “Oracle Linux 6 Update 5 (6.5.0) Media Pack v1 for x86 64 bit”, see https://edelivery.oracle.com, states the following about getting the “Unbreakable Enterprise Kernel (UEK)” installed and running:

For compatibility reasons, the default installation image of Oracle Linux boots the Red Hat compatible kernel to perform the installation. Oracle provides an alternative installation image that supports the installation of Oracle Linux 6.5 using the Unbreakable Enterprise Kernel (UEK) as the installation kernel. This installation method also supports creating a root file system using the Btrfs file system.

Further on they recommend to download both the “Oracle Linux 6 update 5 DVD media” (pkg#1) and the “Oracle Linux 6 update 5 UEK boot ISO” (pkg#2), mounting and extracting pkg#2 to some tmp directory, mounting pkg#2, replacing the images directory of pkg#1 with the images directory of pkg#2 and finally providing pkg#1 on a path accessible via nfs or http.