RHEL5 Kernel HOWTO - Revision history

Palica: /* Step 5: boot-update */

2012-11-18T13:39:55Z

‎Step 5: boot-update

Drobbins: /* Step 2: Install binary kernel */

2012-01-01T04:47:12Z

‎Step 2: Install binary kernel

Oleg at 03:20, 23 June 2011

2011-06-23T03:20:53Z

ViicT: /* Step 2: Install binary kernel */

2011-05-30T12:43:41Z

‎Step 2: Install binary kernel

ViicT: /* Step 2: Install binary kernel */

2011-05-30T12:42:26Z

‎Step 2: Install binary kernel

ViicT: /* Step 2: Install binary kernel */

2011-05-30T12:39:13Z

‎Step 2: Install binary kernel

166.3.244.106: /* Step 4: Edit boot.conf */

2011-05-23T20:11:33Z

‎Step 4: Edit boot.conf

166.3.244.106: /* Step 2: Install binary kernel */

2011-05-23T20:10:27Z

‎Step 2: Install binary kernel

Rh1: /* Step 1: Downgrade udev, lvm2 */

2011-03-20T12:17:14Z

‎Step 1: Downgrade udev, lvm2

Drobbins: g

2011-01-29T21:07:26Z

← Older revision		Revision as of 13:39, 18 November 2012
Line 88:		Line 88:

	[[Category:HOWTO]]		[[Category:HOWTO]]
		+	[[Category:Kernel]]

@@ Line 28: / Line 28: @@
 == Step 2: Install binary kernel ==
-The process for installing an RHEL5-based kernel with [[OpenVZ]] support has been drastically simplified. Simply perform the following steps:
+The process for installing an RHEL5-based kernel with OpenVZ support has been drastically simplified. Simply perform the following steps:
 <pre>

@@ Line 17: / Line 17: @@
 echo ">=sys-fs/lvm2-2.02.69" >> /etc/portage/package.mask
 emerge -u lvm2
 </pre>

@@ Line 24: / Line 24: @@
 <pre>
-# echo "sys-kernel/openvz-rhel5-stable binary" >> /etc/portage/package.mask
+# echo "sys-kernel/openvz-rhel5-stable binary" >> /etc/portage/package.use
 </pre>

@@ Line 24: / Line 24: @@
 <pre>
-# echo "sys-kernel/openvz-rhel5-stable binary" >> /etc/portage/package.use
+# echo "sys-kernel/openvz-rhel5-stable binary" >> /etc/portage/package.mask
 </pre>

@@ Line 54: / Line 54: @@
 boot {
          generate grub
-         default kernel-rhel5-openvz-x86_64-2.6.18-028stab079.2
+         default kernel-openvz-rhel5-stable-x86_64-2.6.18-028stab089.1
          timeout 3
+}
 "Funtoo Linux with OpenVZ" {
-         kernel kernel-rhel5-openvz[-v]
+         kernel kernel-openvz[-v]
-         initrd initramfs-rhel5-openvz[-v]
+         initrd initramfs-openvz[-v]
          params += real_root=auto
+}

@@ Line 24: / Line 24: @@
 <pre>
-# emerge rhel5-openvz-binaries
+# echo "sys-kernel/openvz-rhel5-stable binary" >> /etc/portage/package.mask
 </pre>
-This will build and install a binary kernel image and initial RAM disk, and take care of installing all necessary dependencies like gcc-4.1.2. Once the binary kernel image and initrd is installed, configure <tt>/etc/boot.conf</tt> to find and boot the new kernel.
+This will result in the kernel sources and a binary kernel and initrd being merged. Without <tt>binary</tt> in USE, only the sources will be merged. Then:
 Note: you may need to temporarily modify your <tt>CFLAGS</tt> settings to ensure they are compatible with gcc-4.1 systems. In particular, <tt>-march=native</tt> is not recognized by the older gcc.

@@ Line 1: / Line 1: @@
-This HOWTO will show you how to get a RHEL5-based openvz-sources kernel running on a Funtoo Linux system. Several steps are required including downgrading sys-fs/udev, emerging gcc-4.1.2 (which is required for building RHEL5 sources), and building and configuring the kernel. These steps are appropriate for getting any RHEL5-based 2.6.18 kernels built and running under Funtoo, not just openvz-sources.
+== Introduction ==
-== Steps ==
+This HOWTO will show you how to get a RHEL5-based OpenVZ kernel running on a Funtoo Linux system.
-. Downgrade udev to a version compatible with kernels previous than 2.6.27:
+== Step 1: Downgrade udev, lvm2 ==
 <pre>
@@ Line 10: / Line 12: @@
 </pre>
-. This will also require a downgrade of lvm2, if you are using it. Version 2.02.68 is a good one to use:
+This will also require a downgrade of lvm2, if you are using it. Version 2.02.68 is a good one to use:
 <pre>
@@ Line 17: / Line 19: @@
 </pre>
-. Mask any openvz-sources version equal or newer than 2.6.27:
+== Step 2: Install binary kernel ==
 <pre>
-echo ">=sys-kernel/openvz-sources-2.6.27" >> /etc/portage/package.mask
+# emerge rhel5-openvz-binaries
 </pre>
-. openvz-sources-2.6.18* needs gcc-4.1.*, so you must install it prior build your future downgraded kernel. If you have newer versions than gcc-4.1.* then you must install this one. Also check your CFLAGS if you are using gcc-4.3.* or later *AND* your make.conf CFLAGS has -march=native, due previous GCC versions doesn't allow it. Check [1] and put a correct -march directive or remove it in your CFLAGS ie:
+This will build and install a binary kernel image and initial RAM disk, and take care of installing all necessary dependencies like gcc-4.1.2. Once the binary kernel image and initrd is installed, configure <tt>/etc/boot.conf</tt> to find and boot the new kernel.
+Note: you may need to temporarily modify your <tt>CFLAGS</tt> settings to ensure they are compatible with gcc-4.1 systems. In particular, <tt>-march=native</tt> is not recognized by the older gcc.
-That may take a while, take a cup of your favourite beverage and wait until it is finished.
 [1] http://gcc.gnu.org/onlinedocs/gcc-4.1.2/gcc/i386-and-x86_002d64-Options.html#i386-and-x86_002d64-Options
-. Switch to gcc-4.1* on your system:
+== Step 3: Enable vz initscript ==
 <pre>
-localhost ~ # gcc-config -l
+# rc-update add vz default
- [1] x86_64-pc-linux-gnu-4.1.2
+</pre>
- [2] x86_64-pc-linux-gnu-4.4.3 *
-localhost ~ # gcc-config 1
-* Switching native-compiler to x86_64-pc-linux-gnu-4.1.2...
->>> Regenerating /etc/ld.so.cache...                                                                                                                                                                                                     [ok]
-* If you intend to use the gcc from the new profile in an already
+== Step 4: Edit boot.conf ==
-* running shell, please remember to do:
-*   # source /etc/profile
+Update /etc/boot.conf to point to your new kernel, ie:
-localhost ~ # source /etc/profile
+<pre>
-localhost ~ # gcc --version
+boot {
-gcc (GCC) 4.1.2 (Gentoo 4.1.2 p1.3)
+        generate grub
-gcc (GCC) 4.1.2 (Gentoo 4.1.2 p1.3)
+        default kernel-rhel5-openvz-x86_64-2.6.18-028stab079.2
-Copyright (C) 2006 Free Software Foundation, Inc.
+        timeout 3
-This is free software; see the source for copying conditions.  There is NO
-warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
-localhost ~ #
+"Funtoo Linux with OpenVZ" {
 </pre>
-. Rebuild your sources:
+Note that you must use the <tt>params += real_root=auto</tt> option. This will automatically
-<pre>
+configure your boot loader to specify your root fileysstem as the <tt>real_root</tt> to the
-cd /usr/src/linux
+initrd.
-make menuconfig
-[do your work]
-make
-cp arch/x86/boot/bzImage /boot/linux-2.6.18-openvz-028.068.9
-</pre>
-. Update /etc/boot.conf to point to your new kernel, ie:
+== Step 5: boot-update ==
-<pre>
+Now, simply run <tt>boot-update</tt> as root:
-vi /etc/boot.conf
-[inside /etc/boot.conf now]
-"Funtoo Linux" {
-        kernel linux-2.6.18-openvz-028.068.9
-        params root=/dev/sda3
-−
-</pre>
-−
-. Update grub's configuration file
 <pre>
@@ Line 85: / Line 72: @@
 </pre>
-. Reboot your computer and enjoy
+<tt>boot-update</tt> should show the new kernel as being found and display it as the default
+selection for the next boot. You can now reboot your system and start using OpenVZ.
-<pre>
-reboot
-</pre>
 [[Category:HOWTO]]