Archive for the ‘Private Cloud’ Category
This article explains how to create a FreeBSD 8.2 image on KVM for uploading it to the image store on OpenStack Diablo. The procedure also covers installation of Virtio drivers, as it is essential for an instance running on OpenStack. I have used KVM running on Ubuntu 11.10 64-bit server for creation of the image.
Nova-volume provides persistent block storage compatible with Amazon’s Elastic Block Store. The storage on the instances is non persistent in nature and hence any data that you generate and store on the file system on the first disk of the instance gets lost when the instance is terminated. You will need to use persistent volumes provided by nova-volume if you want any data generated during the life of the instance to persist after the instance is terminated.
Commands from euca2ools package can be used to manage these volumes.
Here are a few examples:
Openstack provides ingress filtering for the instances based on the concept of security groups. OpenStack accomplishes ingress filtering by creating suitable IP Tables rules. A Security Group is a named set of rules that get applied to the incoming packets for the instances. You can specify a security group while launching an instance. Each security group can have multiple rules associated with it. Each rule specifies the source IP/network, protocol type, destination ports etc. Any packet matching these parameters specified in a rule is allowed in. Rest of the packets are blocked.
Cloud computing is a computing model, where resources such as computing power, storage, network and software are abstracted and provided as services on the Internet in a remotely accessible fashion. Billing models for these services are generally similar to the ones adopted for public utilities. On-demand availability, ease of provisioning, dynamic and virtually infinite scalability are some of the key attributes of cloud computing.
An infrastructure setup using the cloud computing model is generally referred to as the “cloud”. The following are the broad categories of services available on the cloud:
- Infrastructure As A Service (IAAS)
- Platform As A Service (PAAS)
- Software As A Service (SAAS)
Amazon Web Services (AWS) is one of the major players providing IAAS. They have two popular services – Elastic Compute Cloud (EC2) and Simple Storage Service (S3). These services are available through web services.