Prompt Title: EC2 NodeJS MemoryDB CloudWatch

To set up CloudWatch Logs for your Node.js application running on the EC2 instance, you need to do the following:

1. Install the CloudWatch Logs agent on your EC2 instance.
2. Configure the CloudWatch Logs agent.
3. Modify your Node.js application to write logs to a file.
4. Test the CloudWatch Logs agent.

Step 1: Install the CloudWatch Logs agent

Connect to your EC2 instance and run the following commands to install the CloudWatch Logs agent:

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

Step 2: Configure the CloudWatch Logs agent

Create a configuration file called cloudwatch-agent-config.json in your home directory with the following content:

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{
  "agent": {
    "metrics_collection_interval": 60,
    "logfile": "/var/log/amazon/amazon-cloudwatch-agent.log"
  },
  "logs": {
    "logs_collected": {
      "files": {
        "collect_list": [
          {
            "file_path": "/path/to/your/log/file.log",
            "log_group_name": "your-log-group-name",
            "log_stream_name": "your-log-stream-name",
            "timezone": "UTC"
          }
        ]
      }
    }
  }
}

Replace /path/to/your/log/file.log with the path to the log file your Node.js application will write to. Replace your-log-group-name and your-log-stream-name with appropriate names for your CloudWatch Log Group and Log Stream.

Next, run the following command to configure the CloudWatch Logs agent:

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

Step 3: Modify your Node.js application to write logs to a file

Update your Node.js application to write logs to a file. You can use the popular winston package to achieve this. First, install winston:

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npm install winston

Then, modify your Node.js application to use winston for logging. Here's an example of how to set up winston to log to a file:

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const winston = require('winston');

const logger = winston.createLogger({
  level: 'info',
  format: winston.format.combine(
    winston.format.timestamp(),
    winston.format.printf(({ timestamp, level, message }) => {
      return `${timestamp} ${level}: ${message}`;
    })
  ),
  transports: [
    new winston.transports.File({ filename: '/path/to/your/log/file.log' })
  ]
});

// Use logger.info(), logger.error(), etc. to log messages
logger.info('Hello, CloudWatch Logs!');

Replace /path/to/your/log/file.log with the path to the log file you specified in the CloudWatch Logs agent configuration.

Step 4: Test the CloudWatch Logs agent

After modifying your Node.js application to write logs to a file, start your application:

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node app.js

After a short while, you should see your logs appearing in the CloudWatch Logs console.

1. Open the CloudWatch console in the AWS Management Console.
2. Click on "Logs" in the left sidebar.
3. Find and click on the Log Group you specified in the CloudWatch Logs agent configuration.
4. Click on the Log Stream you specified in the CloudWatch Logs agent configuration.

You