# Reference: Amazon EC2 launch template examples
<a name="launch-template-examples"></a>

The following are example MIME multi-part files that you can use to create your own templates.

**Topics**
+ [Example: Mount an existing Amazon EFS file system](#example-mount-an-existing-amazon-efs-file-system)
+ [Example: Override default Amazon ECS container agent configuration](#example-override-default-amazon-ecs-container-agent-configuration)
+ [Example: Mount an existing Amazon FSx for Lustre file system](#example-mount-an-existing-amazon-fsx-for-lustre-file-system)

## Example: Mount an existing Amazon EFS file system
<a name="example-mount-an-existing-amazon-efs-file-system"></a>

**Example**  
This example MIME multi-part file configures the compute resource to install the `amazon-efs-utils` package and mount an existing Amazon EFS file system at `/mnt/efs`.  

```
MIME-Version: 1.0
Content-Type: multipart/mixed; boundary="==MYBOUNDARY=="

--==MYBOUNDARY==
Content-Type: text/cloud-config; charset="us-ascii"

packages:
- amazon-efs-utils

runcmd:
- file_system_id_01=fs-abcdef123
- efs_directory=/mnt/efs

- mkdir -p ${efs_directory}
- echo "${file_system_id_01}:/ ${efs_directory} efs tls,_netdev" >> /etc/fstab
- mount -a -t efs defaults

--==MYBOUNDARY==--
```

## Example: Override default Amazon ECS container agent configuration
<a name="example-override-default-amazon-ecs-container-agent-configuration"></a>

**Example**  
This example MIME multi-part file overrides the default Docker image cleanup settings for a compute resource.  

```
MIME-Version: 1.0
Content-Type: multipart/mixed; boundary="==MYBOUNDARY=="

--==MYBOUNDARY==
Content-Type: text/x-shellscript; charset="us-ascii"

#!/bin/bash
echo ECS_IMAGE_CLEANUP_INTERVAL=60m >> /etc/ecs/ecs.config
echo ECS_IMAGE_MINIMUM_CLEANUP_AGE=60m >> /etc/ecs/ecs.config

--==MYBOUNDARY==--
```

## Example: Mount an existing Amazon FSx for Lustre file system
<a name="example-mount-an-existing-amazon-fsx-for-lustre-file-system"></a>

**Example**  
This example MIME multi-part file configures the compute resource to install the `lustre2.10` package from the Extras Library and mount an existing FSx for Lustre file system at `/scratch` and a mount name of `fsx`. This example is for Amazon Linux 2. For installation instructions for other Linux distributions, see [Installing the Lustre Client](https://docs.aws.amazon.com/fsx/latest/LustreGuide/install-lustre-client.html) in the *Amazon FSx for Lustre User Guide*. For more information, see [Mounting your Amazon FSx file system automatically](https://docs.aws.amazon.com/fsx/latest/LustreGuide/mount-fs-auto-mount-onreboot.html) in the *Amazon FSx for Lustre User Guide*.  

```
MIME-Version: 1.0
Content-Type: multipart/mixed; boundary="==MYBOUNDARY=="

--==MYBOUNDARY==
Content-Type: text/cloud-config; charset="us-ascii"

runcmd:
- file_system_id_01=fs-0abcdef1234567890
- region=us-east-2
- fsx_directory=/scratch
- amazon-linux-extras install -y lustre2.10
- mkdir -p ${fsx_directory}
- mount -t lustre ${file_system_id_01}.fsx.${region}.amazonaws.com@tcp:fsx ${fsx_directory}

--==MYBOUNDARY==--
```
In the [volumes](https://docs.aws.amazon.com/batch/latest/APIReference/API_ContainerProperties.html#Batch-Type-ContainerProperties-volumes) and [mountPoints](https://docs.aws.amazon.com/batch/latest/APIReference/API_ContainerProperties.html#Batch-Type-ContainerProperties-mountPoints) members of the container properties the mount points must be mapped into the container.  

```
{
    "volumes": [
        {
            "host": {
                "sourcePath": "/scratch"
            },
            "name": "Scratch"
        }
    ],
    "mountPoints": [
        {
            "containerPath": "/scratch",
            "sourceVolume": "Scratch"
        }
    ],
}
```