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https://wiki.openvz.org/index.php?title=Quick_Installation_CentOS_6&diff=15870
Quick Installation CentOS 6
2015-03-05T18:19:19Z
<p>Sblaydes: Added ploop to the OpenVZ utils yum install line.</p>
<hr />
<div>{{Warning|This is an unofficial guide, use at your own risk. For an official guide, see [[Quick installation]].}}<br />
<br />
This quick installation quide assumes you have CentOS 6 64-bit installed with [http://wiki.centos.org/HowTos/Virtualization/OpenVZ SELinux and Firewall disabled], and that the containers will be on the same subnet as the host node.<br />
<br />
The node's IP is 192.168.1.99/24 and the gateway is 192.168.1.1. The containers will have 192.168.1.101, 192.168.1.102, etc...<br />
<br />
* Add the OpenVZ yum repo<br />
<pre><br />
# wget -O /etc/yum.repos.d/openvz.repo http://download.openvz.org/openvz.repo<br />
# rpm --import http://download.openvz.org/RPM-GPG-Key-OpenVZ<br />
</pre><br />
<br />
* Ensure the yum repo points to RHEL6 packages<br />
<pre><br />
# vi /etc/yum.repos.d/openvz.repo<br />
</pre><br />
<br />
* Install the OpenVZ kernel and ensure it's the 1st option in grub<br />
<pre><br />
# yum install vzkernel<br />
# vi /boot/grub/menu.lst<br />
</pre><br />
<br />
* Install the OpenVZ utilities<br />
<pre><br />
# yum install vzctl vzquota ploop<br />
</pre><br />
<br />
* Tune /etc/sysctl.conf<br />
<pre><br />
# vi /etc/sysctl.conf<br />
net.ipv4.ip_forward = 1<br />
net.ipv4.conf.default.proxy_arp = 0<br />
net.ipv4.conf.all.rp_filter = 1<br />
kernel.sysrq = 1<br />
net.ipv4.conf.default.send_redirects = 1<br />
net.ipv4.conf.all.send_redirects = 0<br />
net.ipv4.icmp_echo_ignore_broadcasts=1<br />
net.ipv4.conf.default.forwarding=1<br />
</pre><br />
<br />
The last 2 steps are necessary only if you are planning on using '''veth''' containers<br />
<br />
* Create a vmbr0 bridge and add the host's interface to it<br />
<pre><br />
# vi /etc/sysconfig/network-scripts/ifcfg-vmbr0 <br />
DEVICE="vmbr0"<br />
BOOTPROTO="static"<br />
IPV6INIT="no"<br />
ONBOOT="yes"<br />
TYPE="Bridge"<br />
DELAY=0<br />
IPADDR=192.168.1.99<br />
NETMASK=255.255.255.0<br />
GATEWAY=192.168.1.1<br />
<br />
# vi /etc/sysconfig/network-scripts/ifcfg-eth0 <br />
DEVICE="eth0"<br />
ONBOOT="yes"<br />
IPV6INIT="no"<br />
TYPE="Ethernet"<br />
BRIDGE="vmbr0"<br />
</pre><br />
<br />
* Create /etc/vz/vznet.conf with the following content. This will automatically add/remove the container's interface to the bridge when you start/stop the container.<br />
<pre><br />
# vi /etc/vz/vznet.conf <br />
#!/bin/bash<br />
EXTERNAL_SCRIPT="/usr/sbin/vznetaddbr"<br />
</pre><br />
<br />
* Done. Reboot<br />
<br />
== Create a VENET Container ==<br />
<br />
* Create a CT<br />
<pre><br />
# vzctl create 101 --ostemplate centos-6-x86_64 --config vswap-1g<br />
</pre><br />
<br />
* Configure the CT<br />
<pre><br />
# vzctl set 101 --save --name server101<br />
# vzctl set 101 --save --onboot yes<br />
# vzctl set 101 --save --hostname server101.example.com<br />
# vzctl set 101 --save --ipadd 192.168.1.101<br />
# vzctl set 101 --save --searchdomain example.com<br />
# vzctl set 101 --save --nameserver 8.8.8.8 --nameserver 8.8.4.4<br />
# vzctl set 101 --save --cpus 4<br />
# vzctl set 101 --save --ram 8G<br />
# vzctl set 101 --save --swap 4G<br />
# vzctl set 101 --save --diskspace 100G<br />
# vzctl start 101<br />
# vzctl exec 101 passwd<br />
</pre><br />
<br />
* Done. Enjoy your new VENET container<br />
<br />
== Create a VETH Container ==<br />
<br />
* Create a CT<br />
<pre><br />
# vzctl create 102 --ostemplate centos-6-x86_64 --config vswap-1g<br />
</pre><br />
<br />
* Configure the CT<br />
<pre><br />
# vzctl set 102 --save --name server102<br />
# vzctl set 102 --save --onboot yes<br />
# vzctl set 102 --save --hostname server102.example.com<br />
# vzctl set 102 --save --netif_add eth0,,,FE:FF:FF:FF:FF:FF<br />
# vzctl set 102 --save --searchdomain example.com<br />
# vzctl set 102 --save --nameserver 8.8.8.8 --nameserver 8.8.4.4<br />
# vzctl set 102 --save --cpus 4<br />
# vzctl set 102 --save --ram 8G<br />
# vzctl set 102 --save --swap 4G<br />
# vzctl set 102 --save --diskspace 100G<br />
# vzctl start 102<br />
# vzctl exec 102 passwd<br />
</pre><br />
<br />
FE:FF:FF:FF:FF:FF will ensure a permanent MAC address on the bridge interface.<br />
<br />
(Linux bridges behave strangely. They use the smallest MAC address of all the attached interfaces. If you add a new interface to the bridge with an even smaller MAC, the MAC of the bridge will change causing network interruption until the switch re-learns the new MAC) <br />
<br />
* Configure the network of a RHEL-based container <br />
<pre><br />
# cat << _EOF_ > /vz/root/102/etc/sysconfig/network-scripts/ifcfg-eth0<br />
DEVICE="eth0"<br />
HOSTNAME="server102"<br />
IPV6INIT="no"<br />
MTU="1500"<br />
TYPE="Ethernet"<br />
ONBOOT=yes<br />
BOOTPROTO=static<br />
IPADDR=192.168.1.102<br />
NETMASK=255.255.255.0<br />
GATEWAY=192.168.1.1<br />
_EOF_<br />
<br />
# vzctl exec 102 /etc/init.d/network restart<br />
</pre><br />
<br />
* Configure the network of a Debian-based container<br />
<pre><br />
# cat << _EOF_ > /vz/root/102/etc/network/interfaces<br />
auto lo eth0<br />
iface lo inet loopback<br />
iface eth0 inet static<br />
address 192.168.1.102<br />
netmask 255.255.255.0<br />
gateway 192.168.1.1<br />
_EOF_<br />
<br />
# vzctl exec 102 /etc/init.d/networking restart<br />
</pre><br />
<br />
* Done. Enjoy your new VETH container<br />
<br />
[[Category: Installation]]<br />
[[Category: HOWTO]]</div>
Sblaydes