AWS Labs

aws-labs.md

Design a good architecture with AWS

CloudWatch Labs

Command to access AWS CLI

sudo apt update -y
sudo apt install unzip -y
curl "https://awscli.amazonaws.com/awscli-exe-linux-x86_64.zip" -o "awscliv2.zip"
unzip awscliv2.zip
sudo ./aws/install

Command to do stress test

sudo apt update -y
sudo apt install stress-ng -y
stress-ng --cpu 4 --io 2 --vm 1 --vm-bytes 250m --timeout 60s --metrics-brief

CloudWatch Metrics

CloudWatch Standard Metrics

CloudWatch Custom Metrics

Create Policy, Create Role, and Attach IAM Role for EC2 Instance

Test

aws cloudwatch list-metrics

Test put-metric

[
  {
    "MetricName": "New Posts",
    "Timestamp": "Tuesday, January 08, 2024 8:28:20 AM",
    "Value": 0.50,
    "Unit": "Count"
  }
]

aws cloudwatch put-metric-data --namespace "JSGuruCustomMetric" --metric-data file://metric.js
aws cloudwatch put-metric-data --metric-name CloudWatchAlarmValue --namespace JSGuruCustomMetric --unit Percent--value 50 --dimensions InstanceID=$(curl -s -X GET -H "X-aws-ec2-metadata-token: $TOKEN" http://169.254.169.254/latest/meta-data/instance-id),InstanceType=$(curl -s -X GET -H "X-aws-ec2-metadata-token: $TOKEN" http://169.254.169.254/latest/meta-data/instance-type)

Request EC2 API Token

• https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/instance-metadata-v2-how-it-works.html

TOKEN=`curl -X PUT "http://169.254.169.254/latest/api/token" -H "X-aws-ec2-metadata-token-ttl-seconds: 21600"`
echo $TOKEN

Get EC2 meta-data and user-data

curl -X GET -H "X-aws-ec2-metadata-token: $TOKEN" http://169.254.169.254/latest/meta-data
curl -X GET -H "X-aws-ec2-metadata-token: $TOKEN" http://169.254.169.254/latest/meta-data/instance-id

curl -X GET -H "X-aws-ec2-metadata-token: $TOKEN" http://169.254.169.254/latest/user-data

Create Alarm

Notification

Trigger Lambda Function

Trigger AutoScale Group with Action