1. 보내준 배포파일 app.py를 백그라운드로 실행한다.

2.해당 EC2는 Public Subnet에 존재해야하며, Public IP로 API 요청 시 정상적으로 접근이 가능하여야 한다. 3.해당 curl로 요청시 app.log에 저장된 내용이 CloudWatch Logs에 저장되어야한다.

       －단,, CloudWatch Agent만을 사용하도록 한다.

1. 명시되지 않은 값은 선수 재량으로 설정하며, 절대 물어보지 않는다.

   －단, AWS Well Architected 6 Pillars를 기준으로 한다.
   

인스턴스를 만들고 유저 데이터에 이거를 넣어준다

#!/bin/bash
dnf install -y python3-pip amazon-cloudwatch-agent
pip3 install flask
nohup python3 /home/ec2-user/app.py > /dev/null 2>&1 &
cat << EOF > /opt/aws/amazon-cloudwatch-agent/etc/amazon-cloudwatch-agent.json
{
  "logs": {
    "logs_collected": {
      "files": {
        "collect_list": [
          {
            "file_path": "/home/ec2-user/app.log",
            "log_group_name": "app-logs",
            "log_stream_name": "{instance_id}",
            "retention_in_days": 7
          }
        ]
      }
    }
  }
}
EOF

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

sudo /opt/aws/amazon-cloudwatch-agent/bin/amazon-cloudwatch-agent-config-wizard 이 명령어 입력

vi app.py치고 이 안에

from flask import Flask, request, jsonify, abort
import datetime
import logging

app = Flask(__name__)

class KSTFormatter(logging.Formatter):
    def formatTime(self, record, datefmt=None):
        utc_dt = datetime.datetime.fromtimestamp(
            record.created,
            datetime.timezone.utc
        )
        kst_dt = utc_dt.astimezone(
            datetime.timezone(datetime.timedelta(hours=9))
        )
        
        if datefmt:
            return kst_dt.strftime(datefmt)
        return kst_dt.strftime('%Y-%m-%d %H:%M:%S,%f')[:-3]

access_log_format = '%(asctime)s - - %(client_ip)s %(port)s %(method)s %(path)s %(status)s'
access_log_formatter = KSTFormatter(access_log_format)

access_log_handler = logging.FileHandler('app.log')
access_log_handler.setFormatter(access_log_formatter)

access_log = logging.getLogger('access')
access_log.setLevel(logging.INFO)
access_log.addHandler(access_log_handler)

@app.after_request
def after_request(response):
    extra = {
        'client_ip': request.remote_addr,
        'port': request.environ['SERVER_PORT'],
        'method': request.method,
        'path': request.path,
        'status': response.status_code
    }
    access_log.info('', extra=extra)
    return response

@app.route('/2xx', methods=['GET'])
def get_2xx():
    try:
        ret = {"status": "200"}
        return jsonify(ret), 200
    except Exception as e:
        app.logger.error(e)
        abort(500)

@app.route('/3xx', methods=['GET'])
def get_3xx():
    try:
        ret = {"status": "300"}
        return jsonify(ret), 300
    except Exception as e:
        app.logger.error(e)
        abort(500)

@app.route('/4xx', methods=['GET'])
def get_4xx():
    try:
        ret = {"status": "400"}
        return jsonify(ret), 400
    except Exception as e:
        app.logger.error(e)
        abort(500)

@app.route('/5xx', methods=['GET'])
def get_5xx():
    try:
        ret = {"status": "500"}
        return jsonify(ret), 500
    except Exception as e:
        app.logger.error(e)
        abort(500)

@app.route('/healthcheck', methods=['GET'])
def get_healthcheck():
    try:
        ret = {"status": "ok"}
        return jsonify(ret), 200
    except Exception as e:
        app.logger.error(e)
        abort(500)

if __name__ == "__main__":
    app.run(host='0.0.0.0', port=8080)

이거다 넣어준다