OpenVZ Virtuozzo Containers Wiki - User contributions [en]

User:Denis Hohryakov

2013-10-30T12:50:32Z

Denis Hohryakov:

FastVPS L2 Support Engineer
https://twitter.com/denssky_d
System Administrator of openvz and PCS host-nodes.
British cat owner.
But I'm no superman.
[http://fastvps.ru FastVPS]

User talk:Denis Hohryakov

2013-10-29T21:25:29Z

Denis Hohryakov:

'''Welcome to ''OpenVZ Linux Containers Wiki''!'''
We hope you will contribute much and well.
You will probably want to read the [[Help:Contents|help pages]].
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.

[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 ~]#

User talk:Denis Hohryakov

2013-10-29T21:07:53Z

Denis Hohryakov: /* 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 */ new section

'''Welcome to ''OpenVZ Linux Containers Wiki''!'''
We hope you will contribute much and well.
You will probably want to read the [[Help:Contents|help pages]].
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 ~]#