Editing User talk:Denis Hohryakov

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Again, welcome and have fun! [[User:Kir|Kir]] ([[User talk:Kir|talk]]) 15:31, 29 October 2013 (EDT)

== HowTo Upgrade OVZ CentOS-5.x-based host-node from vzkernel-2.6.18(stab) to vzkernel-2.6.32(stab) and convert fs from ext3 to ext4 ==


It is very simple.

1. Update your system

2. At /etc/yum.repos.d/openvz.repo do this changes.</nowiki>

   [openvz-kernel-rhel6]
   name=OpenVZ RHEL6-based stable kernels
   #baseurl=http://download.openvz.org/kernel/branches/rhel6-2.6.32/current/
   mirrorlist=http://download.openvz.org/kernel/mirrors-rhel6-2.6.32
   '''enabled=1'''
   gpgcheck=1
   gpgkey=http://download.openvz.org/RPM-GPG-Key-OpenVZ
   '''#exclude=vzkernel-firmware'''

   [openvz-kernel-rhel5]
   name=OpenVZ RHEL5-based kernel
   #baseurl=http://download.openvz.org/kernel/branches/rhel5-2.6.18/current/
   mirrorlist=http://download.openvz.org/kernel/mirrors-rhel5-2.6.18
   '''enabled=0'''
   gpgcheck=1
   gpgkey=http://download.openvz.org/RPM-GPG-Key-OpenVZ


3. Install new 2.6.32 kernlel 

    # yum install vzkernel.x86_64

4. Check grub.conf 

    cat /boot/grub/grub.conf
 
   #
   # Hetzner Online AG - installimage
   # GRUB bootloader configuration file
   #
   timeout 5
   default 0
   title OpenVZ (2.6.32-042stab081.5)
   root (hd0,1)
   kernel /vmlinuz-2.6.32-042stab081.5 ro root=/dev/sda3 vga=0x317 selinux=0 sysfs.deprecated=1
   initrd /initrd-2.6.32-042stab081.5.img
   title OpenVZ (2.6.18-348.16.1.el5.028stab108.1)
   root (hd0,1)
   kernel /vmlinuz-2.6.18-348.16.1.el5.028stab108.1 ro root=/dev/sda3 vga=0x317 selinux=0
   initrd /initrd-2.6.18-348.16.1.el5.028stab108.1.img

If all are correct reboot to new kernel 

5. Time to convert FS. Boot node from live-CD or in Rescue system and perform the following steps
      
      fsck.ext3 -f /dev/sda(x)          
Turn on ext4 features
         
      tune2fs -O extents,uninit_bg,dir_index /dev/sda(x)    
Check new ext4 FS 
          
      fsck.ext4 -fD /dev/sda(x)    
After that mount partition and edit /etc/fstab, then rebuild initrd image whith ext4 support.
NOTE! For 2.6.32 kernels no suitable modules ehci-hcd, ohci-hcd, uhci-hcd. You must specify it in rebuild!
      
      mkinitrd -v -f --with=ext4 --builtin=ehci-hcd --builtin=ohci-hcd --builtin=uhci-hcd  initrd-2.6.32-042stab81.5.img 2.6.32-042stab081.5
6. Reboot to running kernel and enjoy new kernel and FS.
      
      [root@CentOS-58-64-minimal ~]# cat /etc/issue
      CentOS release 5.10 (Final)
      Kernel \r on an \m
      [root@CentOS-58-64-minimal ~]# uname -a 
      Linux CentOS-58-64-minimal 2.6.32-042stab081.5 #1 SMP Mon Sep 30 16:52:24 MSK 2013 x86_64 x86_64 x86_64 GNU/Linux
      [root@CentOS-58-64-minimal ~]# df -Th
      Filesystem    Type    Size  Used Avail Use% Mounted on
      /dev/sda3     ext4    259G  1.5G  244G   1% /
       tmpfs        tmpfs     16G     0   16G   0% /dev/shm
      /dev/sda2     ext3    496M   46M  425M  10% /boot
      /dev/sdb1     ext4    1.8T  196M  1.7T   1% /vz
      [root@CentOS-58-64-minimal ~]#