Open Source For You — December 2017

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Host/hypervisor system requirements: The host is where

the cloud services run in the form of guest virtual machines. Each

host is one machine that meets the following requirements:

ƒ Must support HVM (Intel-VT or AMD-V enabled)

ƒ 64-bit x86 CPU (more cores result in better performance)

ƒ Hardware virtualisation support required

ƒ 4GB of memory

ƒ 36GB of local disk

ƒ At least 1 NIC

ƒ Latest hotfixes applied to hypervisor software

ƒ When you deploy CloudStack, the hypervisor host must

not have any VMs already running

ƒ All hosts within a cluster must be homogeneous. The

CPUs must be of the same type, count, and feature flags

Installation steps: You may be able to do a simple trial

installation, but for full installation, do make sure you go

through all the following topics from the Apache CloudStack

documentation (refer to the section ‘Installation Steps’ of this

documentation):

ƒ Choosing a deployment architecture

ƒ Choosing a hypervisor: Supported features

ƒ Network setup

ƒ Storage setup

ƒ Best practices

The steps for the installation are as follows (you can refer to

the Apache CloudStack documentation for detailed steps). Make

sure you have the required hardware ready as discussed above.

Installing the management server (choose

single- or multi-node): The procedure for installing the

management server is:

ƒ Prepare the operating system

ƒ In the case of XenServer only, download and

install vhd-util

ƒ Install the first management server

ƒ Install and configure the MySQL database

ƒ Prepare NFS shares

ƒ Prepare and start additional management servers (optional)

ƒ Prepare the system VM template

Configuring your cloud

After the management server is installed and running, you can

add the compute resources for it to manage. For an overview

ƒ Zones: Typically, a zone is equivalent to a single

data centre. It consists of one or more pods and

secondary storage.

ƒ Pods: A pod is usually a rack, or row of racks that

includes a Layer-2 switch and one or more clusters.

ƒ Clusters: A cluster consists of one or more homogenous

hosts and primary storage.

ƒ Host: This is a single compute node within a cluster;

often, a hypervisor.

ƒ Primary storage: This is a storage resource typically

provided to a single cluster for the actual running of

instance disk images.

ƒ Secondary storage: This is a zone-wide resource which

stores disk templates, ISO images, and snapshots.

Networking overview: CloudStack offers many types of

networking, but these typically fall into one of two scenarios.

ƒ Basic: This is analogous to AWS-classic style networking. It

provides a single flat Layer-2 network, where guest isolation

is provided at Layer-3 by the hypervisors bridge device.

ƒ Advanced: This typically uses Layer-2 isolation such

as VLANs, though this category also includes SDN

technologies such as Nicira NVP.

Installation

In this section, let us look at the minimum system

requirements and installation steps for CloudStack.

Management server, database and storage system

requirements: The machines that will run the management

server and MySQL database must meet the following

requirements. The same machines can also be used to provide

primary and secondary storage, such as via local disks or NFS.

The management server may be placed on a virtual machine.

ƒ Preferred OS: CentOS/RHEL 6.3+ or Ubuntu 14.04 (.2)

ƒ 64-bit x86 CPU (more cores lead to better performance)

ƒ 4GB of memory

ƒ 250GB of local disk space (more space results in better

capability; 500GB recommended)

ƒ At least 1 NIC

ƒ Statically allocated IP address

ƒ Fully qualified domain name as returned by the

hostname command

Figure 2: A region with multiple zones

Figure 3: Installation complete