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Pacemaker is an open source, high availability resource manager suitable for both small and large clusters. It supports many deployment scenarios and can dramatically reduce hardware costs by allowing several active/passive clusters to be combined to share a common backup node. It monitors the system for hardware and software failures, using advanced algorithms to automatically recover applications in the event of a failure.

In this article, Yossi Nachum of Emind Systems gives a step-by-step guide to installing Pacemaker in Amazon AMI.

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If you’re on the Amazon cloud, then you’ve probably already noticed that the AWS bill you receive is exceedingly complex. If you haven’t already switched, than perhaps stories from peers have scared you off. With the complexity of the consumption-based bill, your cloud costs can get out of hand and you may not understand why.

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Leaving an instance running when it isn’t needed isn’t especially cost effective. But is there a better solution when you need to run short jobs on a recurring schedule? A cloud scheduler allows you “talk” to your cloud and pre-define when instances will start-up and be shut down, from development through to production. Essentially, it enables you to pay only for the time you need.

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Amazon AWS cloud has three types of instance purchasing options:

1. On-demand: the “ordinary” type of EC2 instance - Learn how to launch an on-demand instance.
2. Reserved Instance : Paying a one-time upfront fee and save in hourly instance running costs.
3. Spot instance:  A user can bid for the unused Amazon EC2 compute capacity and get the instance.

A spot instance helps to reduce the cost of the instance.Amazon EC2 has huge idle computing capacity and AWS allows using this idle computing power to launch an instance at a lesser price than an on-demand instance. The present guide demonstrates how to create a spot instance using the AWS supplied Linux AMI.

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The Amazon Elastic Block Store (Amazon EBS) offers disks storage for the Amazon EC2 instances. Amazon EBS volumes provide a scalable storage service, which persists independently of the instance life.

• It is mandatory that both the volume as well as the instance be in the same availability zone.
• The user can create a volume and assign a maximum of 16 EBS volumes to an instance.

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In the final installment of this 3-part series, we will discuss data retrieval, account permissions, integrating with S3, and transferring secure data. To recap, part 1 introduced Glacier as an extremely low-cost storage service that provides secure, durable, and flexible storage for your data backup and archival. In part 2, we discussed some functionalities of Glacier including managing archives, creating a vault, Glacier durability and archive inventory. And now, part 3.

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AWS EC2 is a scalable, reliable and low-priced offering from Amazon for the user’s virtual computation or hosting needs. Elastic IP addresses are static IP addresses designed for elastic cloud computing. The traffic routed to the Elastic IP is translated via the 1:1 Network Address Translation (NAT) and forwarded to the Private IP address of an instance. Unlike a standard EC2 Public IP address, Elastic IP addresses are allocated to accounts and can be remapped to other instances when desired. The user can control this address until choosing to explicitly release it. Elastic IP addresses help the user to achieve high availability as it allows programmatic remapping to any other instance in the same region on the current instance or availability zone failure.

The present guide demonstrates how to associate or disassociate an Elastic IP to an instance.

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Adopting the cloud  must come with a management solution strategy. Cloud Management refers to all cloud environment aspects and their related tasks. Tasks include deploying, monitoring, analyzing and more.

Many IT organizations today running to adopt the new disruptive cloud methodologies. Choosing to run a business on a cloud is a strategic decision, picking the right way to orchestrate your cloud resources should be an integral part of your cloud adoption strategy.

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In part 1 of this three part series, we introduced Amazon Glacier as an extremely low-cost cloud storage service that provides secure, durable, and flexible storage for data backup and archival. Amazon Glacier allows you to store your data reliably for as little as $0.01 per gigabyte per month. It helps you to retain your data for future analysis or reference so you can focus more on business than operating and maintaining storage infrastructure.

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AWS has introduced a new offering called Amazon Glacier, an advanced, durable archive that changes the traditional manual way of archiving.

AWS Glacier follows the similar concept and is ideally suited when you need to store your data files/objects, collected over years, in a reliable place. In this presentation you will find some basics on how to get started with Amazon glacier including some important tips and best practices.

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