

End of support notice: On October 7th, 2026, Amazon will discontinue support for Amazon IoT Greengrass Version 1. After October 7th, 2026, you will no longer be able to access the Amazon IoT Greengrass V1 resources. For more information, please visit [Migrate from Amazon IoT Greengrass Version 1](https://docs.amazonaws.cn/greengrass/v2/developerguide/migrate-from-v1.html).

# Running Amazon IoT Greengrass in a Docker container
<a name="run-gg-in-docker-container"></a>

Amazon IoT Greengrass can be configured to run in a [Docker](https://www.docker.com/) container.

You can download a Dockerfile [through Amazon CloudFront](what-is-gg.md#gg-docker-download) that has the Amazon IoT Greengrass Core software and dependencies installed. To modify the Docker image to run on different platform architectures or reduce the size of the Docker image, see the `README` file in the Docker package download.

To help you get started experimenting with Amazon IoT Greengrass, Amazon also provides prebuilt Docker images that have the Amazon IoT Greengrass Core software and dependencies installed. You can download an image from [Docker Hub](https://hub.docker.com/r/amazon/aws-iot-greengrass) or [Amazon Elastic Container Registry](https://docs.amazonaws.cn/AmazonECR/latest/userguide/what-is-ecr.html) (Amazon ECR). These prebuilt images use Amazon Linux 2 (x86\$164) and Alpine Linux (x86\$164, Armv7l, or AArch64) base images.

**Important**  
<a name="docker-images-end-of-maintenance"></a>On June 30, 2022, Amazon IoT Greengrass ended maintenance for Amazon IoT Greengrass Core software v1.x Docker images that are published to Amazon Elastic Container Registry (Amazon ECR) and Docker Hub. You can continue to download these Docker images from Amazon ECR and Docker Hub until June 30, 2023, which is 1 year after maintenance ended. However, the Amazon IoT Greengrass Core software v1.x Docker images no longer receive security patches or bug fixes after maintenance ended on June 30, 2022. If you run a production workload that depends on these Docker images, we recommend that you build your own Docker images using the Dockerfiles that Amazon IoT Greengrass provides. For more information, see [Amazon IoT Greengrass Docker software](what-is-gg.md#gg-docker-download).

This topic describes how to download the Amazon IoT Greengrass Docker image from Amazon ECR and run it on a Windows, macOS, or Linux (x86\$164) platform. The topic contains the following steps:

1. [Get the Amazon IoT Greengrass container image from Amazon ECR](#docker-pull-image)

1. [Create and configure the Greengrass group and core](#docker-config-gg)

1. [Run Amazon IoT Greengrass locally](#docker-run-gg)

1. [Configure "No container" containerization for the group](#docker-no-container)

1. [Deploy Lambda functions to the Docker container](#docker-add-lambdas)

1. [(Optional) Deploy client devices that interact with Greengrass in the Docker container](#docker-add-devices)

The following features aren't supported when you run Amazon IoT Greengrass in a Docker container:<a name="docker-image-unsupported-features"></a>
+ [Connectors](connectors.md) that run in **Greengrass container** mode. To run a connector in a Docker container, the connector must run in **No container** mode. To find connectors that support **No container** mode, see [Amazon-provided Greengrass connectors](connectors-list.md). Some of these connectors have an isolation mode parameter that you must set to **No container**.
+ [Local device and volume resources](access-local-resources.md). Your user-defined Lambda functions that run in the Docker container must access devices and volumes on the core directly.

These features aren't supported when the Lambda runtime environment for the Greengrass group is set to [No container](lambda-group-config.md#no-container-mode), which is required to run Amazon IoT Greengrass in a Docker container.

## Prerequisites
<a name="docker-image-prerequisites"></a>

Before you start this tutorial, you must do the following.<a name="docker-image-prereq-list"></a>
+ You must install the following software and versions on your host computer based on the Amazon Command Line Interface (Amazon CLI) version that you choose.

------
#### [ Amazon CLI version 2 ]
  + [Docker](https://docs.docker.com/install/) version 18.09 or later. Earlier versions might also work, but we recommend 18.09 or later.
  + Amazon CLI version 2.0.0 or later.
    + To install the Amazon CLI version 2, see [Installing the Amazon CLI version 2](https://docs.amazonaws.cn/cli/latest/userguide/install-cliv2.html).
    + To configure the Amazon CLI, see [Configuring the Amazon CLI](https://docs.amazonaws.cn/cli/latest/userguide/cli-chap-configure.html).
**Note**  
To upgrade to a later Amazon CLI version 2 on a Windows computer, you must repeat the [MSI installation](https://docs.amazonaws.cn/cli/latest/userguide/install-cliv2-windows.html) process.

------
#### [ Amazon CLI version 1 ]
  + [Docker](https://docs.docker.com/install/) version 18.09 or later. Earlier versions might also work, but we recommend 18.09 or later.
  + [Python](https://www.python.org/downloads/) version 3.6 or later.
  + [pip](https://pip.pypa.io/en/stable/installing) version 18.1 or later.
  + Amazon CLI version 1.17.10 or later
    + To install the Amazon CLI version 1, see [Installing the Amazon CLI version 1](https://docs.amazonaws.cn/cli/latest/userguide/install-cliv1.html).
    + To configure the Amazon CLI, see [Configuring the Amazon CLI](https://docs.amazonaws.cn/cli/latest/userguide/cli-chap-configure.html).
    + To upgrade to the latest version of the Amazon CLI version 1, run the following command.

      ```
      pip install awscli --upgrade --user
      ```
**Note**  
If you use the [MSI installation](https://docs.amazonaws.cn/cli/latest/userguide/install-windows.html#msi-on-windows) of the Amazon CLI version 1 on Windows, be aware of the following:  
If the Amazon CLI version 1 installation fails to install botocore, try using the [Python and pip installation](https://docs.amazonaws.cn/cli/latest/userguide/awscli-install-windows.html#awscli-install-windows-pip).
To upgrade to a later Amazon CLI version 1, you must repeat the MSI installation process.

------
+ To access Amazon Elastic Container Registry (Amazon ECR) resources, you must grant the following permission. 
  + Amazon ECR requires users to grant the `ecr:GetAuthorizationToken` permission through an Amazon Identity and Access Management (IAM) policy before they can authenticate to a registry and push or pull images from an Amazon ECR repository. For more information, see [Amazon ECR Repository Policy Examples](https://docs.amazonaws.cn/AmazonECR/latest/userguide/repository-policy-examples.html) and [Accessing One Amazon ECR Repository](https://docs.amazonaws.cn/AmazonECR/latest/userguide/security_iam_id-based-policy-examples.html#security_iam_id-based-policy-examples-access-one-bucket) in the *Amazon Elastic Container Registry User Guide*.

## Step 1: Get the Amazon IoT Greengrass container image from Amazon ECR
<a name="docker-pull-image"></a>

Amazon provides Docker images that have the Amazon IoT Greengrass Core software installed.

**Warning**  <a name="docker-images-python-2.7-removal"></a>
Starting with v1.11.6 of the Amazon IoT Greengrass Core software, the Greengrass Docker images no longer include Python 2.7, because Python 2.7 reached end-of-life in 2020 and no longer receives security updates. If you choose to update to these Docker images, we recommend that you validate that your applications work with the new Docker images before you deploy the updates to production devices. If you require Python 2.7 for your application that uses a Greengrass Docker image, you can modify the Greengrass Dockerfile to include Python 2.7 for your application.

For steps that show how to pull the `latest` image from Amazon ECR, choose your operating system:

### Pull the container image (Linux)
<a name="docker-pull-image-linux"></a>

Run the following commands in your computer terminal.

1. <a name="docker-get-login"></a>Log in to the Amazon IoT Greengrass registry in Amazon ECR.

   ```
   aws ecr get-login-password --region  us-west-2 | docker login --username AWS --password-stdin https://216483018798.dkr.ecr.us-west-2.amazonaws.com
   ```

   If successful, the output prints `Login Succeeded`.

1. <a name="docker-docker-pull"></a>Retrieve the Amazon IoT Greengrass container image.

   ```
   docker pull 216483018798.dkr.ecr.us-west-2.amazonaws.com/aws-iot-greengrass:latest
   ```
**Note**  
The `latest` image contains the latest stable version of the Amazon IoT Greengrass Core software installed on an Amazon Linux 2 base image. You can also pull other images from the repository. To find all available images, check the **Tags** page on [Docker Hub](https://hub.docker.com/r/amazon/aws-iot-greengrass) or use the **aws ecr list-images** command. For example:  

   ```
   aws ecr list-images --region us-west-2 --registry-id 216483018798 --repository-name aws-iot-greengrass
   ```

1. Enable symlink and hardlink protection. If you're experimenting with running Amazon IoT Greengrass in a container, you can enable the settings for the current boot only.
**Note**  
You might need to use **sudo** to run these commands.
   + To enable the settings for the current boot only:

     ```
     echo 1 > /proc/sys/fs/protected_hardlinks
     echo 1 > /proc/sys/fs/protected_symlinks
     ```
   + To enable the settings to persist across restarts:

     ```
     echo '# Amazon IoT Greengrass' >> /etc/sysctl.conf 
     echo 'fs.protected_hardlinks = 1' >> /etc/sysctl.conf 
     echo 'fs.protected_symlinks = 1' >> /etc/sysctl.conf
     
     sysctl -p
     ```

1. <a name="docker-linux-enable-ipv4"></a>Enable IPv4 network forwarding, which is required for Amazon IoT Greengrass cloud deployment and MQTT communications to work on Linux. In the `/etc/sysctl.conf` file, set `net.ipv4.ip_forward` to 1, and then reload `sysctls`.

   ```
   sudo nano /etc/sysctl.conf
   # set this net.ipv4.ip_forward = 1
   sudo sysctl -p
   ```
**Note**  
You can use the editor of your choice instead of nano.

### Pull the container image (macOS)
<a name="docker-pull-image-mac"></a>

Run the following commands in your computer terminal.

1. <a name="docker-get-login"></a>Log in to the Amazon IoT Greengrass registry in Amazon ECR.

   ```
   aws ecr get-login-password --region  us-west-2 | docker login --username AWS --password-stdin https://216483018798.dkr.ecr.us-west-2.amazonaws.com
   ```

   If successful, the output prints `Login Succeeded`.

1. <a name="docker-docker-pull"></a>Retrieve the Amazon IoT Greengrass container image.

   ```
   docker pull 216483018798.dkr.ecr.us-west-2.amazonaws.com/aws-iot-greengrass:latest
   ```
**Note**  
The `latest` image contains the latest stable version of the Amazon IoT Greengrass Core software installed on an Amazon Linux 2 base image. You can also pull other images from the repository. To find all available images, check the **Tags** page on [Docker Hub](https://hub.docker.com/r/amazon/aws-iot-greengrass) or use the **aws ecr list-images** command. For example:  

   ```
   aws ecr list-images --region us-west-2 --registry-id 216483018798 --repository-name aws-iot-greengrass
   ```

### Pull the container image (Windows)
<a name="docker-pull-image-windows"></a>

Run the following commands in a command prompt. Before you can use Docker commands on Windows, Docker Desktop must be running.

1. <a name="docker-get-login"></a>Log in to the Amazon IoT Greengrass registry in Amazon ECR.

   ```
   aws ecr get-login-password --region  us-west-2 | docker login --username AWS --password-stdin https://216483018798.dkr.ecr.us-west-2.amazonaws.com
   ```

   If successful, the output prints `Login Succeeded`.

1. <a name="docker-docker-pull"></a>Retrieve the Amazon IoT Greengrass container image.

   ```
   docker pull 216483018798.dkr.ecr.us-west-2.amazonaws.com/aws-iot-greengrass:latest
   ```
**Note**  
The `latest` image contains the latest stable version of the Amazon IoT Greengrass Core software installed on an Amazon Linux 2 base image. You can also pull other images from the repository. To find all available images, check the **Tags** page on [Docker Hub](https://hub.docker.com/r/amazon/aws-iot-greengrass) or use the **aws ecr list-images** command. For example:  

   ```
   aws ecr list-images --region us-west-2 --registry-id 216483018798 --repository-name aws-iot-greengrass
   ```

## Step 2: Create and configure the Greengrass group and core
<a name="docker-config-gg"></a>

The Docker image has the Amazon IoT Greengrass Core software installed, but you must create a Greengrass group and core. This includes downloading certificates and the core configuration file.
+ Follow the steps in [Module 2: Installing the Amazon IoT Greengrass Core software](module2.md). Skip the steps where you download and run the Amazon IoT Greengrass Core software. The software and its runtime dependencies are already set up in the Docker image.

## Step 3: Run Amazon IoT Greengrass locally
<a name="docker-run-gg"></a>

After your group is configured, you're ready to configure and start the core. For steps that show how to do this, choose your operating system:

### Run Greengrass locally (Linux)
<a name="docker-run-gg-linux"></a>

Run the following commands in your computer terminal.

1. <a name="docker-create-certs-folder"></a>Create a folder for the device's security resources, and move the certificate and keys into that folder. Run the following commands. Replace *path-to-security-files* with the path to the security resources, and replace *certificateId* with the certificate ID in the file names.

   ```
   mkdir /tmp/certs
   mv path-to-security-files/certificateId-certificate.pem.crt /tmp/certs
   mv path-to-security-files/certificateId-public.pem.key /tmp/certs
   mv path-to-security-files/certificateId-private.pem.key /tmp/certs
   mv path-to-security-files/AmazonRootCA1.pem /tmp/certs
   ```

1. <a name="docker-create-config-folder"></a>Create a folder for the device's configuration, and move the Amazon IoT Greengrass Core configuration file to that folder. Run the following commands. Replace *path-to-config-file* with the path to the configuration file.

   ```
   mkdir /tmp/config
   mv path-to-config-file/config.json /tmp/config
   ```

1. <a name="docker-docker-run"></a>Start Amazon IoT Greengrass and bind-mount the certificates and configuration file in the Docker container.

   Replace `/tmp` with the path where you decompressed your certificates and configuration file.

   ```
   docker run --rm --init -it --name aws-iot-greengrass \
   --entrypoint /greengrass-entrypoint.sh \
   -v /tmp/certs:/greengrass/certs \
   -v /tmp/config:/greengrass/config \
   -p 8883:8883 \
   216483018798.dkr.ecr.us-west-2.amazonaws.com/aws-iot-greengrass:latest
   ```

   The output should look like this example:

   ```
   Setting up greengrass daemon
   Validating hardlink/softlink protection
   Waiting for up to 30s for Daemon to start
   
   Greengrass successfully started with PID: 10
   ```

### Run Greengrass locally (macOS)
<a name="docker-run-gg-mac"></a>

Run the following commands in your computer terminal.

1. <a name="docker-create-certs-folder"></a>Create a folder for the device's security resources, and move the certificate and keys into that folder. Run the following commands. Replace *path-to-security-files* with the path to the security resources, and replace *certificateId* with the certificate ID in the file names.

   ```
   mkdir /tmp/certs
   mv path-to-security-files/certificateId-certificate.pem.crt /tmp/certs
   mv path-to-security-files/certificateId-public.pem.key /tmp/certs
   mv path-to-security-files/certificateId-private.pem.key /tmp/certs
   mv path-to-security-files/AmazonRootCA1.pem /tmp/certs
   ```

1. <a name="docker-create-config-folder"></a>Create a folder for the device's configuration, and move the Amazon IoT Greengrass Core configuration file to that folder. Run the following commands. Replace *path-to-config-file* with the path to the configuration file.

   ```
   mkdir /tmp/config
   mv path-to-config-file/config.json /tmp/config
   ```

1. <a name="docker-docker-run"></a>Start Amazon IoT Greengrass and bind-mount the certificates and configuration file in the Docker container.

   Replace `/tmp` with the path where you decompressed your certificates and configuration file.

   ```
   docker run --rm --init -it --name aws-iot-greengrass \
   --entrypoint /greengrass-entrypoint.sh \
   -v /tmp/certs:/greengrass/certs \
   -v /tmp/config:/greengrass/config \
   -p 8883:8883 \
   216483018798.dkr.ecr.us-west-2.amazonaws.com/aws-iot-greengrass:latest
   ```

   The output should look like this example:

   ```
   Setting up greengrass daemon
   Validating hardlink/softlink protection
   Waiting for up to 30s for Daemon to start
   
   Greengrass successfully started with PID: 10
   ```

### Run Greengrass locally (Windows)
<a name="docker-run-gg-windows"></a>

1. Create a folder for the device's security resources, and move the certificate and keys into that folder. Run the following commands in a command prompt. Replace *path-to-security-files* with the path to the security resources, and replace *certificateId* with the certificate ID in the file names.

   ```
   mkdir C:\Users\%USERNAME%\Downloads\certs
   move path-to-security-files\certificateId-certificate.pem.crt C:\Users\%USERNAME%\Downloads\certs
   move path-to-security-files\certificateId-public.pem.key C:\Users\%USERNAME%\Downloads\certs
   move path-to-security-files\certificateId-private.pem.key C:\Users\%USERNAME%\Downloads\certs
   move path-to-security-files\AmazonRootCA1.pem C:\Users\%USERNAME%\Downloads\certs
   ```

1. Create a folder for the device's configuration, and move the Amazon IoT Greengrass Core configuration file to that folder. Run the following commands in a command prompt. Replace *path-to-config-file* with the path to the configuration file.

   ```
   mkdir C:\Users\%USERNAME%\Downloads\config
   move path-to-config-file\config.json C:\Users\%USERNAME%\Downloads\config
   ```

1. Start Amazon IoT Greengrass and bind-mount the certificates and configuration file in the Docker container. Run the following commands in your command prompt.

   ```
   docker run --rm --init -it --name aws-iot-greengrass --entrypoint /greengrass-entrypoint.sh -v c:/Users/%USERNAME%/Downloads/certs:/greengrass/certs -v c:/Users/%USERNAME%/Downloads/config:/greengrass/config -p 8883:8883 216483018798.dkr.ecr.us-west-2.amazonaws.com/aws-iot-greengrass:latest
   ```

   When Docker prompts you to share your `C:\` drive with the Docker daemon, allow it to bind-mount the `C:\` directory inside the Docker container. For more information, see [Shared drives](https://docs.docker.com/docker-for-windows/#shared-drives) in the Docker documentation. 

   The output should look like this example:

   ```
   Setting up greengrass daemon
   Validating hardlink/softlink protection
   Waiting for up to 30s for Daemon to start
   
   Greengrass successfully started with PID: 10
   ```

**Note**  
If the container doesn't open the shell and exits immediately, you can debug the issue by bind-mounting the Greengrass runtime logs when you start the image. For more information, see [To persist Greengrass runtime logs outside of the Docker container](#debugging-docker-persist-logs).

## Step 4: Configure "No container" containerization for the Greengrass group
<a name="docker-no-container"></a>

When you run Amazon IoT Greengrass in a Docker container, all Lambda functions must run without containerization. In this step, you set the default containerization for the group to **No container**. You must do this before you deploy the group for the first time.

1. <a name="console-gg-groups"></a>In the Amazon IoT console navigation pane, under **Manage**, expand **Greengrass devices**, and then choose **Groups (V1)**.

1. <a name="group-choose-group"></a>Choose the group whose settings you want to change.

1. Choose the **Lambda functions** tab.

1. Under **Default Lambda function runtime environment**, choose **Edit**.

1. In the **Edit default Lambda function runtime environment**, under **Default Lambda function containerization**, change the containerization settings.

1. Choose **Save**.

The changes take effect when the group is deployed.

For more information, see [Setting default containerization for Lambda functions in a group](lambda-group-config.md#lambda-containerization-groupsettings).

**Note**  
By default, Lambda functions use the group containerization setting. If you override the **No container** setting for any Lambda functions when Amazon IoT Greengrass is running in a Docker container, the deployment fails.

## Step 5: Deploy Lambda functions to the Amazon IoT Greengrass Docker container
<a name="docker-add-lambdas"></a>

You can deploy long-lived Lambda functions to the Greengrass Docker container.
+ Follow the steps in [Module 3 (part 1): Lambda functions on Amazon IoT Greengrass](module3-I.md) to deploy a long-lived Hello World Lambda function to the container.

## Step 6: (Optional) Deploy client devices that interact with Greengrass running in the Docker container
<a name="docker-add-devices"></a>

You can also deploy client devices that interact with Amazon IoT Greengrass when it's running in a Docker container.
+ Follow the steps in [Module 4: Interacting with client devices in an Amazon IoT Greengrass group](module4.md) to deploy client devices that connect to the core and send MQTT messages.

## Stopping the Amazon IoT Greengrass Docker container
<a name="docker-stop"></a>

To stop the Amazon IoT Greengrass Docker container, press Ctrl\$1C in your terminal or command prompt. This action sends `SIGTERM` to the Greengrass daemon process to tear down the Greengrass daemon process and all Lambda processes that were started by the daemon process. The Docker container is initialized with `/dev/init` process as PID 1, which helps in removing any leftover zombie processes. For more information, see the [Docker run reference](https://docs.docker.com/engine/reference/commandline/run/#options).

## Troubleshooting Amazon IoT Greengrass in a Docker container
<a name="troubleshooting-docker-gg"></a>

Use the following information to help troubleshoot issues with running Amazon IoT Greengrass in a Docker container.

### Error: Cannot perform an interactive login from a non TTY device.
<a name="docker-troubleshootin-ecr-get-login-password"></a>

**Solution:** This error can occur when you run the `aws ecr get-login-password` command. Make sure that you installed the latest Amazon CLI version 2 or version 1. We recommend that you use the Amazon CLI version 2. For more information, see [Installing the Amazon CLI](https://docs.amazonaws.cn/cli/latest/userguide/cli-chap-install.html) in the *Amazon Command Line Interface User Guide*.

### Error: Unknown options: -no-include-email.
<a name="docker-troubleshooting-cli-version"></a>

**Solution:** This error can occur when you run the `aws ecr get-login` command. Make sure that you have the latest Amazon CLI version installed (for example, run: `pip install awscli --upgrade --user`). If you're using Windows and you installed the CLI using the MSI installer, you must repeat the installation process. For more information, see [Installing the Amazon Command Line Interface on Microsoft Windows](https://docs.amazonaws.cn/cli/latest/userguide/awscli-install-windows.html) in the *Amazon Command Line Interface User Guide*.

### Warning: IPv4 is disabled. Networking will not work.
<a name="docker-troubleshooting-ipv4-disabled"></a>

**Solution:** You might receive this warning or a similar message when running Amazon IoT Greengrass on a Linux computer. Enable IPv4 network forwarding as described in this [step](#docker-linux-enable-ipv4). Amazon IoT Greengrass cloud deployment and MQTT communications don't work when IPv4 forwarding isn't enabled. For more information, see [Configure namespaced kernel parameters (sysctls) at runtime](https://docs.docker.com/engine/reference/commandline/run/#configure-namespaced-kernel-parameters-sysctls-at-runtime) in the Docker documentation.

### Error: A firewall is blocking file Sharing between windows and the containers.
<a name="docker-troubleshooting-firewall"></a>

**Solution:** You might receive this error or a `Firewall Detected` message when running Docker on a Windows computer. This can also occur if you are signed in on a virtual private network (VPN) and your network settings are preventing the shared drive from being mounted. In that situation, turn off VPN and re-run the Docker container.

### Error: An error occurred (AccessDeniedException) when calling the GetAuthorizationToken operation: User: arn:aws:iam::<account-id>:user/<user-name> is not authorized to perform: ecr:GetAuthorizationToken on resource: \$1
<a name="docker-troubleshooting-ecr-perms"></a>

You might receive this error when running the `aws ecr get-login-password` command if you don't have sufficient permissions to access an Amazon ECR repository. For more information, see [Amazon ECR Repository Policy Examples](https://docs.amazonaws.cn/AmazonECR/latest/userguide/repository-policy-examples.html) and [Accessing One Amazon ECR Repository](https://docs.amazonaws.cn/AmazonECR/latest/userguide/security_iam_id-based-policy-examples.html) in the *Amazon ECR User Guide*.

For general Amazon IoT Greengrass troubleshooting help, see [Troubleshooting Amazon IoT Greengrass](gg-troubleshooting.md).

### Debugging Amazon IoT Greengrass in a Docker container
<a name="debugging-docker-gg"></a>

To debug issues with a Docker container, you can persist the Greengrass runtime logs or attach an interactive shell to the Docker container.

#### To persist Greengrass runtime logs outside of the Docker container
<a name="debugging-docker-persist-logs"></a>

You can run the Amazon IoT Greengrass Docker container after bind-mounting the `/greengrass/ggc/var/log` directory. The logs persist even after the container exits or is removed.

**On Linux or macOS**  
[Stop any Greengrass Docker containers](#docker-stop) running on the host, and then run the following command in a terminal. This bind-mounts the Greengrass `log` directory and starts the Docker image.   
Replace `/tmp` with the path where you decompressed your certificates and configuration file.  

```
docker run --rm --init -it --name aws-iot-greengrass \
      --entrypoint /greengrass-entrypoint.sh \
      -v /tmp/certs:/greengrass/certs \
      -v /tmp/config:/greengrass/config \
      -v /tmp/log:/greengrass/ggc/var/log \
      -p 8883:8883 \
      216483018798.dkr.ecr.us-west-2.amazonaws.com/aws-iot-greengrass:latest
```
You can then check your logs at `/tmp/log` on your host to see what happened while Greengrass was running inside the Docker container.

**On Windows**  
[Stop any Greengrass Docker containers](#docker-stop) running on the host, and then run the following command in a command prompt. This bind-mounts the Greengrass `log` directory and starts the Docker image.  

```
cd C:\Users\%USERNAME%\Downloads
mkdir log
docker run --rm --init -it --name aws-iot-greengrass --entrypoint /greengrass-entrypoint.sh -v c:/Users/%USERNAME%/Downloads/certs:/greengrass/certs -v c:/Users/%USERNAME%/Downloads/config:/greengrass/config -v c:/Users/%USERNAME%/Downloads/log:/greengrass/ggc/var/log -p 8883:8883 216483018798.dkr.ecr.us-west-2.amazonaws.com/aws-iot-greengrass:latest
```
You can then check your logs at `C:/Users/%USERNAME%/Downloads/log` on your host to see what happened while Greengrass was running inside the Docker container.

#### To attach an interactive shell to the Docker container
<a name="debugging-docker-attach-shell"></a>

You can attach an interactive shell to a running Amazon IoT Greengrass Docker container. This can help you investigate the state of the Greengrass Docker container.

**On Linux or macOS**  
While the Greengrass Docker container is running, run the following command in a separate terminal.  

```
docker exec -it $(docker ps -a -q -f "name=aws-iot-greengrass") /bin/bash
```

**On Windows**  
While the Greengrass Docker container is running, run the following commands in a separate command prompt.  

```
docker ps -a -q -f "name=aws-iot-greengrass"
```
Replace *gg-container-id* with the `container_id` result from the previous command.  

```
docker exec -it gg-container-id /bin/bash
```