A project to study about observability

I'm using ELK (Elastic, Logstash, Kibana) to check a small application made in python

• Python
• Flask
• Elastic Apm (Flask)
• Docker
• Docker Compose
• ELK Stack

All the configurations needed are in files inside the services folder

• ./docker/apm-server/apm-server.yml
• ./docker/elasticsearch/config/elasticsearch.yml
• ./docker/filebeat/config/filebeat.docker.yml
• ./docker/kibana/config/kibana.yml
• ./docker/logstash/pipeline/filebeat.conf

Start all services in docker-compose.yml file

$ docker-compose -f ./docker/docker-compose.yml up

The application is listening on port 3000

http://locahost:3000

There are a few endpoints to fill the elastic service

• /home

  • this endpoint will log Calling /home - Lets goooooo in elastic and print Hello world on screen

• /home/me

  • this endpoint will just print Hello Felipe on screen

• /error/capture/exception

  • this endpoint will gerenate a ZeroDivisionError error and be captured by apm service and then print error captured on screen

• /error/capture/message

  • this endpoint will capture handling error message into the apm service and then print error captured on screen

• /error/capture/extra

  • this endpoint will put some extra info into log and then print error captured on screen

• /error/capture/extra2

  • same as /extra, just to test different messages

• /error/capture/should/

  • this endpoint, you can pass "true" or "false" to param, which will:
    • true: thrown an expcetion, which will be captured by apm service
    • false: will not thrown an exception and will just print not throwing exception on screen

• /events/<event_name>

  • <event_name> is optional, this will create a transaction name (span) in elastic

The kibana is listening on port 5601

http://localhost:5601