Introduction to AWS CloudWatch
Amazon CloudWatch is just a component of Amazon Web Services (AWS) that gives monitoring for AWS resources and the consumer applications running on the AWS instances. It allows real time monitoring of AWS resources like AWS EBS, AWS EC2 Instances, AWS RDS etc. In addition it provides matrices for CPU utilization, latency, and other useful parameters. It's used in order to be sure that all of the resources as well the applications work underneath the threshold limit. Once the defined threshold limit changes CloudWatch alarms sends the notification or automatically makes the changes to the resources as the guidelines defined by you. Users can access CloudWatch functions using an API, command-line tools or the AWS Management Console. The CloudWatch interface provides present statistics which can be viewed in graph format.
Amazon CloudWatch Features
The cloudwatch provides some useful features the following:
The Amazon CloudWatch simply collect and store logs i.e. it allows to collect and store logs from your resources, applications, and services in near real-time.
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In adding together it allows you to collect default metrics from AWS services, such as Amazon EC2, Amazon RDS, Amazon S3, AWS Lambda etc lacking the action on your own part.
In addition it allows you to collect custom metrics from your own personal applications to monitor operational performance, troubleshoot issues, and spot trends
Amazon CloudWatch dashboards enable you to produce re-usable graphs and visualize your cloud resources and applications in a specific view. Can visualize key metrics, like CPU utilization and memory, and evaluate them to capacity.
Amazon CloudWatch also allows to correlate metrics and logs. This helps you quickly go from diagnosing the issue toward understanding the main cause.
It Supports Auto Scaling. Auto Scaling can help you computerize capacity and resource planning. You can set a entry to alarm on a key metric and trigger an automated Auto Scaling action. Like, you might set up an Auto Scaling workflow to include or remove EC2 instances centered on CPU utilization metrics and optimize resource costs.
Cloud watch allows you to react promptly to operational changes and take corrective action.
Amazon CloudWatch allows you to check trends and seasonality with 15 months of metric data. This data allows to perform historical analysis to fine-tune resource utilization.
Amazon CloudWatch is integrated with AWS Identity and Access Management (IAM) so you can control which users and resources have permission to get into your computer data and how they could access it.
Amazon CloudWatch Concepts
Metrics are the fundamental concept in CloudWatch. A full represents a time-ordered pair of data points that are published to CloudWatch. Think of a full as a variable to monitor, and the information points represent the values of this variable over time.
A namespace is a box for CloudWatch metrics. Metrics in various namespaces are isolated from each other, so that metrics from different applications aren't incorrectly aggregated into the same statistics.
A dimension is just a name/value pair that uniquely identifies a metric. You can allot up to 10 dimensions to a metric.
Statistics are metric data aggregations over particular periods of time. CloudWatch provides statistics based on the metric data points supplied by your custom data or supplied by other AWS services to CloudWatch. Aggregations are made utilizing the namespace, metric name, dimensions, and the information point unit of measure, within the timeframe you specify.
You can use an alarm to automatically initiate actions on your own behalf. An alarm watches just one metric over a particular time frame, and performs more than one specified actions, based on the value of the metric in unity with a threshold over time.
Amazon CloudWatch Pricing
As most of us realize that while working together with Amazon web services, the main problem we always used to access learn about may be the pricing and billing for using them.
With Amazon CloudWatch, there's no up-front commitment or minimum fee. i.e. you simply purchase everything you use. You is likely to be charged at the end of the month for your usage.
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