AWS Labs

aws-labs.md

Design a good architecture with AWS

Create ALB for your EC Instances

Add new CNAME record into your hosted zone

Monitor with CloudWatch

Install CloudWatchAgent

Create an IAM Role

Install CloudWatch

wget https://amazoncloudwatch-agent.s3.amazonaws.com/ubuntu/amd64/latest/amazon-cloudwatch-agent.deb
sudo dpkg -i -E ./amazon-cloudwatch-agent.deb

Attach IAM Role

Install aws cli and test

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

Create config file

sudo /opt/aws/amazon-cloudwatch-agent/bin/amazon-cloudwatch-agent-config-wizard

Start

sudo /opt/aws/amazon-cloudwatch-agent/bin/amazon-cloudwatch-agent-ctl -a fetch-config -m ec2 -s -c file:/opt/aws/amazon-cloudwatch-agent/bin/config.json

Sample config

{
  "agent": {
    "metrics_collection_interval": 60,
    "run_as_user": "cwagent"
  },
  "metrics": {
    "aggregation_dimensions": [["InstanceId"]],
    "append_dimensions": {
      "AutoScalingGroupName": "${aws:AutoScalingGroupName}",
      "ImageId": "${aws:ImageId}",
      "InstanceId": "${aws:InstanceId}",
      "InstanceType": "${aws:InstanceType}"
    },
    "metrics_collected": {
      "cpu": {
        "measurement": [
          "cpu_usage_idle",
          "cpu_usage_iowait",
          "cpu_usage_user",
          "cpu_usage_system"
        ],
        "metrics_collection_interval": 60,
        "resources": ["*"],
        "totalcpu": false
      },
      "disk": {
        "measurement": ["used_percent", "inodes_free"],
        "metrics_collection_interval": 60,
        "resources": ["*"]
      },
      "diskio": {
        "measurement": ["io_time"],
        "metrics_collection_interval": 60,
        "resources": ["*"]
      },
      "mem": {
        "measurement": ["mem_used_percent"],
        "metrics_collection_interval": 60
      },
      "statsd": {
        "metrics_aggregation_interval": 60,
        "metrics_collection_interval": 10,
        "service_address": ":8125"
      },
      "swap": {
        "measurement": ["swap_used_percent"],
        "metrics_collection_interval": 60
      }
    }
  }
}

Stress Test

sudo apt install stress
sudo apt install stress-ng

stress-ng --cpu 4 --io 2 --vm 1 --vm-bytes 250m --timeout 60s --metrics-brief

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