Nimbus project

Nimbus Project

Directed by: Supervised by:
KARROUCH Manal Mr.AMRANI
AJERAR Souhail
EDDERDABI Mounia
ASSAOUY Samia

6/28/2012 1

Introduction

6/28/2012 2

Plan

Part 1 Nimbus Project

Part 2 The installation of nimbus

Part 3 Problems & solution

Part 4 Result

6/28/2012 3

Nimbus Project

• Open-source toolkit

• Cloud software

• Client via WSRF-based or Amazon EC2 WSDL web service APIs.

• Nimbus supports the Xen hypervisor or KVM

• Writing in the python and java language

6/28/2012 4

The installation of nimbus
Dependencies

• Install java and javac

• Install Python

• Install GCC

• Apache Ant 1.6.2 or later

6/28/2012 5

Service installation
• Create nimbus user
• Download and install
We start by create a separate unix account to
install and run the Nimbus services.
$ wget http://www.nimbusproject.org/downloads/nimbus-iaas-2.9-src.tar.gz
$ tar xfz nimbus-iaas-2.9-src.tar.gz
$ cd nimbus-2.9-src/
$ ./install $NIMBUS_HOME

• Service ports
• Certificates
Cumulus : 8888
Nimbus Service interface : 8443
EC2 compatible Query Interface: 8444

• Start services
• Create first user
• Install cloud client and credentials

• Try it out
– In the beginning we did attempt to query the service.
This command shows the running VMs that we own.

Install DHCP and Configure
Networking
• Network pools
The directory “$NIMBUS_HOME/services/etc/nimbus/
workspace-service/network-pools/” content two files
– The Private file:
– The Public file:

DHCP server

• The addresses for VMs are physically queried via an
external DHCPd service. There are two ways of arranging
the DHCP configuration :

– Centralized -- a new or existing DHCP service that we configure
with Nimbus-specific MAC to IP mappings. This is generally
simpler to set up and is covered in this guide.
– Local -- a DHCP server is installed on every VMM node and
automatically configured with the appropriate addresses just
before a VM boots.

DHCP caution

• After created using Nimbus, the service selects a
network pool entry and sends the IP and
hostname back to the client.

Install VMM Software

KVM virtualization
• KVM is a full virtualization solution for Linux on x86 hardware containing
virtualization extensions. It consists of a loadable kernel module, that provides
the core virtualization infrastructure and a processor specific module.
• Before to install KVM we check if our CPU supports hardware virtualization :

• Should display something, like this:

6/28/2012 13

Kvm installation
• To install KVM and virtinst (a tool to create virtual machines), we run:

• Then we reboot the system:
• After that we verify if it works as user as root but we had an error about failing
to connect to the hypervisor

• So we change the permissions on /var/run/libvirt/libvirt-sock, we modify the
contents of the libvirt qemu.conf file

6/28/2012 14

• Then we make the nimbus user a member of the root group

• After that we make the libvirt domain socket available for reading and writing
by the root group by enabling the following configurations
in /etc/libvirt/libvirtd.conf

6/28/2012 15


• Finally, run the virt-manager tool by selecting the Applications -> System
Tools -> Virtual Machine Manager menu.

• When loaded, the manager should appear as illustrated in the following
figure:

6/28/2012 16

Metadata server

• This service is disabled by default, but will be required if we want
to use the Nimbus Context Broker. Configuration is in
$NIMBUS_HOME/services/etc/nimbus/workspace-
service/metadata.conf. We must choose an IP and port for the
service to listen on. This address must be accessible by the VMs.
We should also set listen=true.

Install workspace-control
• After having the KVM we can now download the VMM control package to the
machine, then copy it to the /opt/nimbus destination directory

• Obtain the simple image:

6/28/2012 18

Secure Shell SSH

• To connect the machines we should use SSH which is both a computer
program and a communication protocol secure. The connection protocol
requires an exchange of encryption keys at the beginning of
connection. Thereafter all the frames are encrypted. It becomes impossible to
use a sniffer to see what a user does.

• The Nimbus service and VMM nodes communicate via SSH, so we set up
password-less SSH keys

• Then we Copy the generated public key to the VMM node and then login there
directly

6/28/2012 19

• Append the service node's key to the authorized_keys file

• generate a key pair for the VMM node itself and exit back to the service node

• Then we fetched the VMM's public key and authorize it

6/28/2012 20

Autoconfig

• Nimbus includes a configuration program that checks for a properly
functioning SSH setup and configures the VMM node into the service. The
script is interactive and will go through a series of questions and tests before it
makes any changes.

• Afterwards, restart the Nimbus services in order for changes to take effect

6/28/2012 21

Problems && Solution

Problem in the Change some ligne
installation of the code source

Problem in the
Installe the last
installetion of some
version of CentOS
packages

The default
Problem caused by
configuration of
KVM
Nimbus is Xen

6/28/2012 22

Result

• First, run the status and list commands to ensure that the IaaS and repository
services are still running correctly.

• After to executed this command we moved on and attempt to upload a real
VM image to the repository.

6/28/2012 23

Result
Upload image
• We started with the image that you used earlier to test the VMM

• Then we use the cloud-client to upload the VM image to the Cumulus
repository

• The list operation should show the new image

6/28/2012 24

Result
• Now we are ready to boot this image

• Then we attempt to SSH into the new VM

6/28/2012 25

Conclusion

6/28/2012 26

Nimbus project

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