Bash script to monitor health of Airflow scheduler container deployed with docker compose

airflow_health_monitor.sh

#!/bin/bash

# Monitors the health of the scheduler container in an Airflow docker compose deployment, sends SMTP email if it's unhealthy
# Change as needed to match your container name and your SMTP server settings
# Requires the sendemail package being installed on the host machine
# sudo apt-get install sendemail, if on Ubuntu

# Get container health status
healthy=$(docker inspect -f '{{.State.Health.Status}}' airflow-airflow-scheduler-1)

# Check if healthy
if [[ $healthy != "healthy" ]]; then
  SERVER="smtpmail.company.com"
  FROM="ITAlerts@company.com"
  TO="You@company.com"
  SUBJ="Airflow scheduler container is unhealthy"
  MESSAGE="Please investigate as Airflow jobs may not be running."
  CHARSET="utf-8"
  sendemail -f $FROM -t $TO -u $SUBJ -s $SERVER -m $MESSAGE -v -o message-charset=$CHARSET
fi

# Save this ^^^ as airflow_health_monitor.sh

# Add to cron to run every 5 minutes:
# Run on command line:
crontab -e
# And add a new line for it to run every six hours:
0 */6 * * * ~/airflow_health_monitor.sh