In this tutorial how to install kvm server on centos 7 for Apache Cloud Stack. Apache Cloud Stack is an open source cloud computing. Its offer many services like public cloud, private cloud, cloud storage, cloud instance & user friendly ui etc.

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Operating System: CentOS 7.9
IP Address  : 10.66.100.50
RAM   : 8GB
Disk   : 500GB
Service  : Apache Cloud Stack v4.15.1.0
Java   : 11 jdk
Host Name : kvm.technologyrss.local
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Step #01: Prepare server

cat /etc/redhat-release && ip r

Setup selinux

vi /etc/selinux/config

change to SELINUX=disabled then Save press Esc type :wq then press Enter.

Add all server ip and host name into hosts file. open below file.

vi /etc/hosts

Insert below all lines into this file.

127.0.0.1   localhost localhost.localdomain localhost4 localhost4.localdomain4
10.66.100.15     cloud.technologyrss.local cloud
10.66.100.50     kvm.technologyrss.local kvm
10.66.100.30     acs-nfs.technologyrss.local acs-nfs

Save press Esc type :wq then press Enter.

Also change hostname file.

vi /etc/hostname

Insert below line into this file.

kvm

Step #02: Install dependency packages.

yum install -y wget chrony epel-release
yum -y update
yum -y install bridge-utils net-tools
wget https://download-ib01.fedoraproject.org/pub/epel/7/x86_64/Packages/p/python36-libvirt-4.5.0-1.el7.x86_64.rpm
yum -y localinstall python36-libvirt-4.5.0-1.el7.x86_64.rpm

Then add Apache Cloud Stack repo.

vi /etc/yum.repos.d/cloudstack.repo

Insert below lines.

[cloudstack]
name=cloudstack
baseurl=http://cloudstack.apt-get.eu/centos/$releasever/4.15/
enabled=1
gpgcheck=0

Save press Esc type :wq then press Enter.

Now run apache cloud stack agent installation command as like below.

yum -y install cloudstack-agent

Step #03: Configure libvirtd.

vi /etc/libvirt/libvirtd.conf

Insert below lines.

listen_tls = 0
listen_tcp = 1
tcp_port = "16509"
auth_tcp = "none"
mdns_adv = 0

Save press Esc type :wq then press Enter.

vi /etc/sysconfig/libvirtd

Remove # from below line.

LIBVIRTD_ARGS="--listen"

Save press Esc type :wq then press Enter.

Now restart libvirtd service using below command.

service libvirtd stop
service libvirtd start
systemctl enable libvirtd

Step #04: Configure kvm Advanced networking.

I have two interface enp2s0 is LAN traffic and enp4s0 for WAN traffic, but enp4s0 is not connected to WAN.

Open LAN interface enp2s0

vi /etc/sysconfig/network-scripts/ifcfg-enp2s0

Remove old text and then insert below all lines into this file. Must be replace as your interface name & mac address.

DEVICE="enp2s0"
HWADDR="8c:89:a5:5a:f5:54"
ONBOOT="yes"
HOTPLUG="no"
BOOTPROTO="none"
TYPE="Ethernet"
BRIDGE="cloudbr0"

Save press Esc type :wq then press Enter.

Open bridge interface cloudbr0

vi /etc/sysconfig/network-scripts/ifcfg-cloudbr0

Insert below all lines into this file. Must be replace as your interface name & own ip address.

DEVICE="cloudbr0"
TYPE="Bridge"
ONBOOT="yes"
BOOTPROTO="none"
IPV6INIT="no"
IPV6_AUTOCONF="no"
DELAY="5"
IPADDR="10.66.100.50"
GATEWAY="10.66.100.10"
NETMASK="255.255.0.0"
DNS1="8.8.8.8"
DNS2="8.8.8.8"
DOMAIN="technologyrss.local"
STP="yes"

Save press Esc type :wq then press Enter.

Open wan interface enp4s0

DEVICE="enp4s0"
HWADDR="00:e0:4a:0b:6a:5a"
ONBOOT="yes"
HOTPLUG="no"
BOOTPROTO="none"
TYPE="Ethernet"
BRIDGE="cloudbr1"

Remove old text and then insert below all lines into this file. Must be replace as your interface name & mac address.

vi /etc/sysconfig/network-scripts/ifcfg-cloudbr1

Insert below all lines into this file. Must be replace as your interface name & own ip address.

DEVICE="cloudbr1"
TYPE="Bridge"
ONBOOT="yes"
BOOTPROTO="none"
IPV6INIT="no"
IPV6_AUTOCONF="no"
DELAY="5"
STP="yes"

Save press Esc type :wq then press Enter.

Step #05: Restart all services using below command.

systemctl stop NetworkManager
systemctl disable NetworkManager
service cloudstack-agent start
systemctl enable cloudstack-agent
mknod /dev/kvm c 10 232
chmod 660 /dev/kvm
chown root:qemu /dev/kvm
service cloudstack-agent status
service libvirtd status
reboot

If you see any error, please see my YouTube video for more details. Please share on your own network for save this guide.