Posted on April 14, 2010 with 1 Comment
I created an OpenVZ vps with ubuntu template ubuntu-9.10-x86.tar.gz
After login to VPS, there was no networking enabled in the VPS
root@server70 [/vz/template/cache]# vzctl enter 102
entered into CT 102
root@hosthat:/# ifconfig
root@hosthat:/# ping yahoo.com
ping: unknown host yahoo.com
root@hosthat:/#
Whrn i restarted networking, i got error
root@hosthat:/# /etc/init.d/networking restart
* Reconfiguring network interfaces... /etc/network/interfaces:15: interface lo declared allow-auto twice
ifdown: couldn't read interfaces file "/etc/network/interfaces"
/etc/network/interfaces:15: interface lo declared allow-auto twice
ifup: couldn't read interfaces file "/etc/network/interfaces"
[fail]
root@hosthat:/#It says
/etc/network/interfaces:15: interface lo declared allow-auto twice
I checked file /etc/network/interfaces and found two entry for lo
root@hosthat:/dev# cat /etc/network/interfaces
# This configuration file is auto-generated.
# WARNING: Do not edit this file, otherwise your changes will be lost.
# Please edit template /etc/network/interfaces.template instead.
auto lo
iface lo inet loopback
address 127.0.0.1
netmask 255.0.0.0
broadcast 127.255.255.255
up ip route replace 127.0.0.0/8 dev lo
# Auto generated interfaces
auto lo
iface lo inet loopback
auto venet0
iface venet0 inet static
address 127.0.0.1
netmask 255.255.255.255
broadcast 0.0.0.0
up route add -net 192.0.2.1 netmask 255.255.255.255 dev venet0
up route add default gw 192.0.2.1
auto venet0:0
iface venet0:0 inet static
address 67.228.104.123
netmask 255.255.255.255
broadcast 0.0.0.0
root@hosthat:/dev#This is fixed by commenting lo entry in file /etc/network/interfaces.template
root@hosthat:/dev# cat /etc/network/interfaces.template
auto lo
iface lo inet loopback
address 127.0.0.1
netmask 255.0.0.0
broadcast 127.255.255.255
up ip route replace 127.0.0.0/8 dev lo
root@hosthat:/dev# vi /etc/network/interfacesAfter commenting, the file content look like
#auto lo
#iface lo inet loopback
# address 127.0.0.1
# netmask 255.0.0.0
# broadcast 127.255.255.255
# up ip route replace 127.0.0.0/8 dev lo
After rebooting, network interfaces started working properly.
root@hosthat:/# ifconfig
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:30 errors:0 dropped:0 overruns:0 frame:0
TX packets:30 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:2550 (2.5 KB) TX bytes:2550 (2.5 KB)
venet0 Link encap:UNSPEC HWaddr 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00
inet addr:127.0.0.1 P-t-P:127.0.0.1 Bcast:0.0.0.0 Mask:255.255.255.255
UP BROADCAST POINTOPOINT RUNNING NOARP MTU:1500 Metric:1
RX packets:316733 errors:0 dropped:0 overruns:0 frame:0
TX packets:168152 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:473833406 (473.8 MB) TX bytes:9101935 (9.1 MB)
venet0:0 Link encap:UNSPEC HWaddr 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00
inet addr:67.228.104.123 P-t-P:67.228.104.123 Bcast:0.0.0.0 Mask:255.255.255.255
UP BROADCAST POINTOPOINT RUNNING NOARP MTU:1500 Metric:1
root@hosthat:/#
Posted on June 17, 2009 with 4 Comments
Install instructions for OpenVZ available at
http://wiki.openvz.org/Quick_installation
Here is what i done to install OpenVZ on CentOS 5 32 bit OS/
cd /etc/yum.repos.d
wget http://download.openvz.org/openvz.repo
rpm --import http://download.openvz.org/RPM-GPG-Key-OpenVZ
Find if OS is 32 or 64 bit using uname -a
# uname -a
Linux server84.hosthat.com 2.6.18-92.1.18.el5 #1 SMP Wed Nov 12 09:30:27 EST 2008 i686 i686 i386 GNU/Linux
#
In this case, i686 in uname -a result means the OS is 32 bit.
Now we will find list of openvz kernal available
# yum list|grep ovzkernel
ovzkernel.i686 2.6.18-128.1.1.el5.028stab062.3
ovzkernel-PAE.i686 2.6.18-128.1.1.el5.028stab062.3
ovzkernel-PAE-devel.i686 2.6.18-128.1.1.el5.028stab062.3
ovzkernel-devel.i686 2.6.18-128.1.1.el5.028stab062.3
ovzkernel-ent.i686 2.6.18-128.1.1.el5.028stab062.3
ovzkernel-ent-devel.i686 2.6.18-128.1.1.el5.028stab062.3
ovzkernel-xen.i686 2.6.18-128.1.1.el5.028stab062.3
ovzkernel-xen-devel.i686 2.6.18-128.1.1.el5.028stab062.3
#
We need to install .686 version of the kernel. Kernel with PAE is for servers with more than 4 GB of RAM.
We check memory available in the server with free -m
# free -m
total used free shared buffers cached
Mem: 2017 1662 355 0 175 1319
-/+ buffers/cache: 167 1850
Swap: 4071 0 4071
#Its only 2 GB, so we can install non PAE kernel. For severs with more than 4 GB of RAM, always better to get 64 bit OS.
So we install
yum install ovzkernel.i686 ovzkernel-devel.i686
After install finished, we get
Installed: ovzkernel.i686 0:2.6.18-128.1.1.el5.028stab062.3 ovzkernel-devel.i686 0:2.6.18-128.1.1.el5.028stab062.3
To boot from this kernel, we need o configure boot loader, grub.
The file contains
# grub.conf generated by anaconda
#
# Note that you do not have to rerun grub after making changes to this file
# NOTICE: You have a /boot partition. This means that
# all kernel and initrd paths are relative to /boot/, eg.
# root (hd0,0)
# kernel /vmlinuz-version ro root=/dev/hde3
# initrd /initrd-version.img
#boot=/dev/hde
default=0
timeout=5
splashimage=(hd0,0)/grub/splash.xpm.gz
hiddenmenu
title CentOS (2.6.18-128.1.1.el5.028stab062.3)
root (hd0,0)
kernel /vmlinuz-2.6.18-128.1.1.el5.028stab062.3 ro root=LABEL=/1
initrd /initrd-2.6.18-128.1.1.el5.028stab062.3.img
title CentOS (2.6.18-92.1.18.el5)
root (hd0,0)
kernel /vmlinuz-2.6.18-92.1.18.el5 ro root=LABEL=/1
initrd /initrd-2.6.18-92.1.18.el5.img
title CentOS (2.6.18-92.el5)
root (hd0,0)
kernel /vmlinuz-2.6.18-92.el5 ro root=LABEL=/1
initrd /initrd-2.6.18-92.el5.imgHere default=0 means first entry in the file get booted, that is
title CentOS (2.6.18-128.1.1.el5.028stab062.3)
root (hd0,0)
kernel /vmlinuz-2.6.18-128.1.1.el5.028stab062.3 ro root=LABEL=/1
initrd /initrd-2.6.18-128.1.1.el5.028stab062.3.imgThis is our new openvz kernel, so nothing to change in boot loader.
Now need to make some changes in
At the end of the file add
# On Hardware Node we generally need
# packet forwarding enabled and proxy arp disabled
net.ipv4.ip_forward = 1
net.ipv6.conf.default.forwarding = 1
net.ipv6.conf.all.forwarding = 1
net.ipv4.conf.default.proxy_arp = 0
# Enables source route verification
net.ipv4.conf.all.rp_filter = 1
# Enables the magic-sysrq key
kernel.sysrq = 1
# We do not want all our interfaces to send redirects
net.ipv4.conf.default.send_redirects = 1
net.ipv4.conf.all.send_redirects = 0
Disable SELinux if you have not already done.
vi /etc/sysconfig/selinux
In the file change value of SELINUX to disabled.
Now reboot the server, so server will boot with new openvz kernel
After reboot, we have the new kernal shown in uname -a
root@server84 [~]# uname -a
Linux server84.hosthat.com 2.6.18-128.1.1.el5.028stab062.3 #1 SMP Tue May 5 17:31:34 MSD 2009 i686 i686 i386 GNU/Linux
root@server84 [~]#
Now install
yum install vzctl vzquota
You need to do a reboot now
To create a VPS, download an OS Template from
http://download.openvz.org/template/precreated/
To create an VPS with ubuntu OS
cd /vz/template/cache
wget http://download.openvz.org/template/precreated/ubuntu-9.04-x86.tar.gz
Now you have the OS template cache, before creating VPS, i need a FREE IP
In cpanel servers, go to
Main >> IP Functions >> Show or Delete Current IP Addresses
Delete a IP that is not used.
On non Cpanel servers you need to edit the file
vi /etc/sysconfig/network-scripts/ifcfg-eth0-range0
OR
vi /etc/sysconfig/network-scripts/ifcfg-eth0:X
Here is the syntax to create a new VPS
vzctl create CTID --ostemplate osname
vzctl set CTID --ipadd a.b.c.d --save
vzctl set CTID --nameserver a.b.c.d --save
vzctl start CTID
To create VSP i run following commands
vzctl create 101 --ostemplate ubuntu-9.04-x86
vzctl set 101 --ipadd 67.159.32.134 --save
vzctl set 101 --nameserver vps2.hosthat.com --save
vzctl set 101 --nameserver 208.67.222.222 --save
vzctl set 101 --onboot yes --save
vzctl set 101 --kmemsize 60000000 --save
vzctl set 101 --privvmpages 900000 --save
vzctl set 101 --numproc 1000 --save
vzctl set 101 --numtcpsock 500 --save
vzctl set 101 --tcpsndbuf 20000000:35000000 --save
vzctl set 101 --tcprcvbuf 20000000:35000000 --save
vzctl set 101 --diskspace 10048576:10153434 --save
vzctl set 101 --cpuunits 1000 --save
vzctl start 101
Here are the results
root@server84 [~]# vzctl create 101 --ostemplate ubuntu-9.04-x86
Unable to get full ostemplate name for ubuntu-9.04-x86
Creating container private area (ubuntu-9.04-x86)
vzquota : (error) Quota on syscall for id 101: File exists
vzquota on failed [3]
vzquota : (error) Quota is not running for id 101
Performing postcreate actions
Container private area was created
root@server84 [~]# vzctl set 101 --ipadd 67.159.32.134 --save
Saved parameters for CT 101
root@server84 [~]# vzctl set 101 --nameserver vps2.hosthat.com --save
Saved parameters for CT 101
root@server84 [~]# vzctl set 101 --nameserver 208.67.222.222 --save
Saved parameters for CT 101
root@server84 [~]# vzctl set 101 --onboot yes --save
Saved parameters for CT 101
root@server84 [~]# vzctl set 101 --kmemsize 60000000 --save
Saved parameters for CT 101
root@server84 [~]# vzctl set 101 --privvmpages 900000 --save
Saved parameters for CT 101
root@server84 [~]# vzctl set 101 --numproc 1000 --save
Saved parameters for CT 101
root@server84 [~]# vzctl set 101 --numtcpsock 500 --save
Saved parameters for CT 101
root@server84 [~]# vzctl set 101 --tcpsndbuf 20000000:35000000 --save
Saved parameters for CT 101
vzctl set 101 --tcprcvbuf 20000000:35000000 --save
root@server84 [~]# vzctl set 101 --tcprcvbuf 20000000:35000000 --save
Saved parameters for CT 101
root@server84 [~]# vzctl set 101 --diskspace 10048576:10153434 --save
Saved parameters for CT 101
root@server84 [~]# vzctl set 101 --cpuunits 1000 --save
Saved parameters for CT 101
root@server84 [~]#
Now lets start VSP
root@server84 [~]# vzctl start 101
Starting container ...
vzquota : (error) Quota on syscall for id 101: File exists
vzquota on failed [3]
root@server84 [~]#
The error was due to quota was not enabled in the hard disk.
This error was fixed by adding usrquota in /etc/fstab for / partition
root@server84 [/]# cat /etc/fstab
LABEL=/1 / ext3 defaults,usrquota 1 1
LABEL=/boot1 /boot ext3 defaults 1 2
tmpfs /dev/shm tmpfs defaults 0 0
devpts /dev/pts devpts gid=5,mode=620 0 0
sysfs /sys sysfs defaults 0 0
proc /proc proc defaults 0 0
LABEL=SWAP-hde2 swap swap defaults 0 0
/usr/tmpDSK /tmp ext3 defaults,noauto 0 0
/tmp /var/tmp ext3 defaults,bind,noauto 0 0
root@server84 [/]#
To start VSP
root@server84 [/]# vzctl start 101
Starting container ...
Container is mounted
Adding IP address(es): 67.159.32.134
Setting CPU units: 1000
Configure meminfo: 900000
File resolv.conf was modified
Container start in progress...
root@server84 [/]#
To set root password
root@server84 [/]# vzctl enter 101
entered into CT 101
root@server84:/# cat /etc/*issue
Ubuntu 9.04 \n \l
root@server84:/# passwd
Enter new UNIX password:
Retype new UNIX password:
passwd: password updated successfully
root@server84:/#
Now VPS is ready, i am able to connect to VPS from my computer with SSH.
