EC2 (Elastic Compute Cloud) instances are virtual servers that you can start, stop, and control from the AWS Management Console. Instances run in Amazon’s data centers and provide many advanced computing features that aren’t available with typical shared web hosting.
What is an Amazon EC2?
Amazon Elastic Compute Cloud (Amazon EC2) is a web service that provides resizable compute capacity in the cloud. It is designed to make web-scale cloud computing easier for developers. Amazon EC2 eliminates a lot of hard-to-administer aspects of owning and operating virtual servers, such as hardware provisioning, OS installation and configuration, memory management, load balancing, data backups and recovery, IP address management and resource scheduling. With Amazon EC2’s easy-to-use web service APIs and documentation, you can quickly deploy new Amazon Machine Images (AMIs) or launch new instances with just a few lines of code.
Types of Amazon EC2 instances
You can choose between two types of instances: On-demand or spot. The former requires an upfront payment and then only charges when your instance is running; Spot prices, on the other hand, fluctuate based on supply and demand. Instances are grouped into three sizes: Small (m1), Medium (m3), Large (c1). You should use a larger one if your app doesn’t require a lot of memory but needs raw computational power. If it does, get a smaller one and add more as needed. Use t2 instances for low-traffic websites that don’t need much storage space. It’s also ideal for apps that don’t handle much traffic during off hours, because t2 instances cost less than others during those times. Finally, there are GPU-enabled instances which help speed up tasks that involve heavy graphics processing. These aren’t necessary for most applications though most web servers don’t rely on them in any way so they’re mostly useful for companies with high-performance computing needs like data analysis and scientific computing.
How to Select a Good Amazon EC2 Instance?
When setting up your AWS infrastructure, one of your key considerations is what type of Amazon EC2 instances to use. You might ask yourself: What types of Amazon EC2 instances are there? What factors affect their cost? Here we explore each option in detail and recommend a case-by-case set up for every kind of web application. We cover everything from load balance options, memory size, and storage space options, right through to when it’s best not to use an instance at all. The best part is that after reading our guide, you will be able to make well informed decisions on which type of Amazon EC2 instance suits your needs.
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IAM Roles provide a simple way to configure permissions on AWS resources. Roles are created, attached, and managed in IAM and can be used by all accounts in your AWS account. This means that you don’t have to create separate users and manage them across accounts; everything is taken care of centrally. The permissions that are attached to roles are called policies. A policy consists of one or more permissions that describe what actions a user (or role) can perform on resources within your account in other words, how they interact with resources. These actions include calling APIs, accessing Amazon S3 buckets.
What are IAM Roles?
IAM roles define permissions and allow actions to be performed on your behalf. IAM roles can be created in your AWS console or using an API or CLI. You are not limited by any constraints such as VPC and subnets, but your choices are more complicated. IAM users can also use some of IAM’s default system-wide policies. These policies define how access is managed across different types of resources in AWS, including S3 buckets, DynamoDB tables, CloudFront distributions, Route 53 hosted zones, etc. There are two types of policies permissions and resource-based policies. Permissions grant users access to specific AWS resources while resource-based policies grant access based on conditions like time of day or IP address ranges..