AWS Classroom Series – 16/Dec/2021

Navigating CloudWatch

• Services => CloudWatch

CloudWatch Alarms

• These are managed alert and notification service used to send notifications when anamoly is detected.
• Activity-1: Create an alarm when your ec2-instance (virtual machine on AWS) is under used
  • Create any linux based ec2 instance Refer Here
  • When creating metrics you need to define the condition when alarm has to be raised, which in this case is under-used
  • As per our organizational defintions under-used is any ec2 instance whose cpu-utilization for the last 10 minutes is less than 10%
  • So lets create an alarm
  • Now view the alarm
  • Alarm Status can be
    • insufficient => Not enough data to find if the condition is met or not
    • OK => Condition mentioned in the alarm is not met
    • Alarm => Condition mentioned in the alarm is met
  • When Alarm is raised,
    • We can manually fix the issue
    • We can send notifications
    • For some services, there can be predefined actions.
  • So now lets see actions w.r.t ec2
  • If you want to perform custom action which is not defined in AWS Predefined actions, then Try to create AWS Lambda function and call this from notifications
    • Since Actions are limited we can use Notifications
• Activity 2: Create an alarm which sends email when ec2 instance is underused
  • Notifications and actions:
  • As per our organizational defintions under-used is any ec2 instance whose cpu-utilization for the last 10 minutes is less than 10%
  • To be continued