|I’m asked often about the ins and outs of Amazon Web Services by C-levels, directors and managers. They are not looking for nitty gritty nuances of Proxy with all the API of their Elastic Compute Cloud, they are only considering the general overview of the way the’cloud’ functions.
When explaining AWS for the first time to managers (or anyone, for that matter) it is ideal to talk in concepts rather than in real terms. I’ve also noticed it’s beneficial to attempt to tangiblize the dialogue with familiar terms. With phrases like »Elastic IP » gets quizical looks, but calling it a publicly accessible IP address helps people to get a better overall grasp of concepts before using the AWS terms for things.
At a really high degree, you can think of EC2 as a global computing environment. Within EC2 are geographical areas which may be considered as data centers.
Inside of an Availability Zone, we have can make virtual machines from custom or predefined Amazon Machine Images, or AMIs. An AMI is considered as a snapshot of machine that you can load and operate within the cloud at an Availability Zone. Each time you take an AMI and begin it, it is known as an Instance of the AMI. You are able to choose an AMI and begin it several times, each time creates a new Instance.
To keep your data intact even when an Instance expires, you may use many different AWS providers but one of the very common ones is that the Elastic Block Store, or EBS. Think of EBS as a Hard Disk. Consequently, in case you experience an Instance that is running your website and you wish to be certain that the database stays healthy even if the Instance disappears, then you can use an EBS’hard disk’. In the vernacular of AWS, you’ve created an EBS volume and mounted it on an Instance.
If we would like to secure that data we now have on our EBS volume, we aren’t from the woods yet because even hard drives may fail. We will want to back up this into more secure storage. For this we can use the Simple Storage Solution, or S3 for brief. It’s possible to think of S3 as a readily available tape backup. It allows you to have up to 100 directories of information in your cassette. Every one of those directories is referred to as a bucket in the S3 world. As it’s a good stable storage system, you’ll want to backup your EBS volume(s) into S3 occasionally. And, if you’ve customized your Instance, you are going to want to save a new image of it in S3 also. In this manner, if your attentively customized Instance or EBS volume crashes for any reason, you are able to pull them out of your backup in S3 rather quickly and get up and running again.
Well, all this would be useless if we did not have great security to be certain that our solution has been murdered. Two concepts are employed in AWS for safety purposes. The first is a pair of keys that permits you and your developers to access your systems. These are public/private key pairs and digital certificates required to log in the case. The second, referred to as a security group, can be considered as a firewall setup. You create a security set that defines how outside entities – such as web browsers, or remote desktops, or ftp, or email, etc. – can or cannot access your Instance.
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