Danil Kozyatnikov
How To Execute a Command After Efs Has Been Mounted to Your EC2.
Get Mount Unit Name
First, find out which systemd mount unit handles your efs mount using this commands:
sudo systemctl list-units | grep '/path/to/mount' | awk '{ print $1 }'
Or check at all mount units to find the one you need:
sudo systemctl list-units --type=mount
Create a Service
Create a service file with the following content using this command:
sudo nano /etc/systemd/system/your-service-name.service
[Unit]
Description=Your service description here. # Just a free text description of your service.
After=var-efs.mount # Your mount unit name.
Requires=var-efs.mount # Your mount unit name.
[Service]
Type=simple
Restart=no
User=root
ExecStart=/bin/sh -c "echo 123" # Sh command that you need to execute once the efs is mounted.
[Install]
WantedBy=multi-user.target- Make sure to replace commented variables with what you need.
Enable Your Service
To run this service you first need to enable it with this command: sudo systemctl enable your-service-name
Then you need to start it: sudo systemctl start your-service-name
Check Your Service
To check if your service has been executed after a restart, run this command: systemctl -l status your-service-name