# Mount an EFS in an EC2 instance

## Mounting an EFS in an EC2 instance

If you want to connect an EFS to a Native Docker Service, for example, you can mount it in an EC2 instance.

```bash
btoa(`#!/bin/bash
sudo su
echo "confirm it is running" >> /tmp/startup_log
apt-get install -y nfs-common
cd /
mkdir efs
mount -t nfs4 -o 
nfsvers=4.1,rsize=1048576,wsize=1048576,hard,timeo=600,retrans=2,nore
svport fs-121345b8.efs.us-west-2.amazonaws.com:/ efs
echo "fs-121345b8.efs.us-west-2.amazonaws.com:/ /efs nfs4 
defaults,_netdev 0 0" >> /etc/fstab`);
```

1. Create a `bash` script, as in the example above, and replace `nfs4` with your EFS endpoint. You can run the script below on an existing EC2 instance or run an EC2 user data script to configure the instance at first launch (bootstrapping).
2. In the DuploCloud Portal, [edit the DuploCloud Service](https://docs.duplocloud.com/docs/automation-platform/overview/containers/eks-containers-and-services#services).
3. On the **Edit Service** page, click **Next**. The **Advanced Options** page displays.
4. On the **Advanced Options** page, in the **Volumes** field, enter the configuration YAML to mount the EFS endpoint as a volume.


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