Argos

Argos is an HTTP monitoring service. It allows you to define a list of websites to monitor, and a list of checks to run on these websites. It will then run these checks periodically, and alert you if something goes wrong.

Todo:

• Retrying: attempt 1413 ended with: <Future at 0x104f39390 state=finished raised RuntimeError> Cannot reopen a client instance, once it has been closed.
• Cleandb should keep max number of results by task
• Do not return empty list on / when no results from agents.
• Last seen agents
• donner un aperçu rapide de l’état de la supervision.
• Rename error in unexpected error
• Use background tasks for alerting
• Delete outdated tasks from config
• Implement alerting tasks
• Handles multiple alerting backends (email, sms, gotify)
• Un flag de configuration permet d’ajouter automatiquement un job de vérification de redirection 301 de la version HTTP vers HTTPS
• add an "unknown" severity for check errors
• Add a way to specify the severity of the alerts in the config
• Add a command to generate new authentication token

Implemented checks :

• Returned status code matches what you expect ;
• Returned body matches what you expect ;
• SSL certificate expires in more than X days ;

Development notes

On service start.

1. Read the job definitions file and populate the database.
2. From the job definition, create a list of tasks to execute.
3. From time to time (?) clean the db.

On configuration changes :

• Find and tombstone the JobDefinitions that are not useful anymore.
• Cascade delete the child tasks that are planned. Tombstone them as wel.

On worker demand :

• Find the tasks for which :
  • last_check is not defined
  • OR last_check + max_timedelta > datetime.now()
  • AND selected_by not defined.
• Mark these tasks as selected by the current worker, on the current date.

From time to time (cleanup):

• Check for stalled tasks (datetime.now() - selected_at) > MAX_WORKER_TIME. Remove the lock.

On the worker side

1. Hey, I'm XX, give me some work.
2. OK, this is done, here are the results for Task: response.