Running a Bash Command Automatically in a Docker Container on Synology NAS

If you’re using Docker on your Synology NAS and want to automate the execution of a Bash command after starting a container, you’re in the right place. This article will guide you through the process of running a Bash command automatically in a Docker container on your Synology NAS.

Prerequisites

Before proceeding, ensure that you have the following prerequisites:

• Synology NAS with Docker installed
• Basic understanding of the command line interface (CLI)

Step 1: Create a Dockerfile

To automate the execution of your desired Bash command, you need to create a Dockerfile. The Dockerfile is a text file that contains instructions to build a Docker image. Follow these steps to create the Dockerfile:

1. Open a text editor on your local machine.
2. Create a new file and name it “Dockerfile”.
3. Add the following content to the Dockerfile:

FROM <base-image>

# Set the working directory
WORKDIR /TS3MusicBot

# Copy the necessary files to the container
COPY ./TS3MusicBot .

# Execute the Bash command when the container starts
CMD ["bash", "-c", "nohup ./TS3MusicBot_runscript.sh -account \"E-MAIL\" -port 8484 -webif-pw \"PASSWRD\" -webif-pw-user \"PASSWRD\" -number 3 -webif-bind-ip 0.0.0.0 &"]

Replace <base-image> with the base image you are using for your TS3 Musicbot container.

4. Save the Dockerfile.

Step 2: Build the Docker Image

Once you have created the Dockerfile, you need to build the Docker image. Follow these steps:

1. Open a terminal or command prompt.
2. Navigate to the directory where you saved the Dockerfile.
3. Run the following command to build the Docker image:

docker build -t ts3musicbot-image .

Replace ts3musicbot-image with the desired name for your Docker image.

The Docker build command reads the Dockerfile and builds an image based on the instructions provided.

Step 3: Run the Docker Container

After successfully building the Docker image, you can now run the Docker container with the automated Bash command. Follow these steps:

• Run the following command to start the Docker container:

docker run -d --name ts3musicbot-container ts3musicbot-image

This command starts the container in the background (-d flag) and assigns it a name (--name flag).

• After running the command, the container will automatically execute the Bash command specified in the Dockerfile. Verify the container status using the following command:

docker ps

You should see the running container listed in the output.

Conclusion

By following the steps outlined in this article, you can automate the execution of a Bash command in a Docker container on your Synology NAS. Creating a Dockerfile, building the Docker image, and running the container with the desired command will enable the automated execution of your TS3 Musicbot application.

Automating the process eliminates the need to manually run the Bash command every time you start the container. This approach saves time and ensures consistency in your container setup.

Remember to replace the placeholders in the Dockerfile with the appropriate values for your TS3 Musicbot configuration. With this newfound knowledge, you can leverage Docker to simplify the management and deployment of applications on your Synology NAS.