56 lines
1.7 KiB
Python
56 lines
1.7 KiB
Python
import os
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from time import sleep
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import newrelic.agent
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from app.db import Session
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from app.log import LOG
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# the number of consecutive fails
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# if more than _max_nb_fails, alert
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# reset whenever the system comes back to normal
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# a system is considered fail if incoming_queue + active_queue > 50
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_nb_failed = 0
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_max_nb_fails = 10
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# the maximum number of emails in incoming & active queue
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_max_incoming = 50
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@newrelic.agent.background_task()
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def log_postfix_metrics():
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"""Look at different metrics and alert appropriately"""
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incoming_queue = nb_files("/var/spool/postfix/incoming")
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active_queue = nb_files("/var/spool/postfix/active")
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deferred_queue = nb_files("/var/spool/postfix/deferred")
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LOG.d("postfix queue sizes %s %s %s", incoming_queue, active_queue, deferred_queue)
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newrelic.agent.record_custom_metric("Custom/postfix_incoming_queue", incoming_queue)
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newrelic.agent.record_custom_metric("Custom/postfix_active_queue", active_queue)
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newrelic.agent.record_custom_metric("Custom/postfix_deferred_queue", deferred_queue)
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def nb_files(directory) -> int:
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"""return the number of files in directory and its subdirectories"""
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return sum(len(files) for _, _, files in os.walk(directory))
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@newrelic.agent.background_task()
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def log_nb_db_connection():
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# get the number of connections to the DB
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r = Session.execute("select count(*) from pg_stat_activity;")
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nb_connection = list(r)[0][0]
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LOG.d("number of db connections %s", nb_connection)
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newrelic.agent.record_custom_metric("Custom/nb_db_connections", nb_connection)
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if __name__ == "__main__":
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while True:
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log_postfix_metrics()
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log_nb_db_connection()
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# 1 min
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sleep(60)
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