# Set Up a Server

Each deployment of the Ocean components starts with setting up a server on which these will be installed, either on-premise or hosted in a cloud platform.

## Prerequisites

For simple configurations:

* Operating System: Linux distribution supported by the Docker Engine and Docker Compose products. Please refer to these links for choosing a compatible operating system: [Docker Compose supported platforms](https://docs.docker.com/desktop/install/linux-install/); [Docker Engine supported platforms](https://docs.docker.com/engine/install/).

For complex configurations:

* Operating System: Linux distribution supported by Kubernetes and Docker Engine. Please refer to this link for details: [Kubernetes with Docker Engine](https://kubernetes.io/docs/setup/production-environment/container-runtimes/#docker).

## Server Size

The required CPU and memory for the server depend on the number of requests the component is expected to serve, however, the minimum configuration of the server is:

* 1 core
* 1 GB RAM

## Steps

The steps for setting up a server on which to deploy the Ocean components are the following:

For simple configurations:

1. [Install the operating system](#install-the-operating-system)
2. [Install Docker Engine and Docker Compose](#install-docker-engine-and-docker-compose)

For complex configurations:

1. [Install the operating system](#install-the-operating-system)
2. [Install Kubernetes with Docker Engine](#install-kubernetes-with-docker-engine)

### Install the operating system

As mentioned earlier, you can use either an on-premise server or one hosted in the cloud (AWS, Azure, Digitalocean, etc.). To install the operating system on an on-premise server, please refer to the installation documentation of the operating system.

If you choose to use a server hosted in the cloud, you need to create the server using the user interface provided by the cloud platform. Following is an example of how to create a server in Digitalocean.

#### Example: Create an Ubuntu Linux server in the Digitalocean cloud

1. Create an account and set billing

Go to <https://www.digitalocean.com/> and create an account. Provide the appropriate information for billing and accounting.

2. Create a server

Click on **`Create`** button and choose **`Droplets`** options from dropdown.

<figure><img src="https://932814818-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FzQlpIJEeu8x5yl0OLuXn%2Fuploads%2Fgit-blob-8c49613fa63fb354649fe5dbdd7ac870b25499e3%2Fimage%20(1).png?alt=media" alt=""><figcaption><p>Select Droplet</p></figcaption></figure>

3. Select a server configuration

Select Ubuntu OS, and choose a plan and a configuration.

<figure><img src="https://932814818-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FzQlpIJEeu8x5yl0OLuXn%2Fuploads%2Fgit-blob-12de50b0af4b73960728962cdb0f514970f59460%2Fimage%20(2).png?alt=media" alt=""><figcaption><p>Configure the server</p></figcaption></figure>

###

4. Select the region and set the root password

Select the region where you want the component to be hosted and a root password.

<figure><img src="https://932814818-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FzQlpIJEeu8x5yl0OLuXn%2Fuploads%2Fgit-blob-570dafdd7f2796ecca04c37c533b45869e0637be%2Fimage%20(6).png?alt=media" alt=""><figcaption><p>Select the region and set the root password</p></figcaption></figure>

5. Finish the configuration and create the server

Specify a hostname for the server, specify the project to which you assign the server, and then click on `Create Droplet.`

<figure><img src="https://932814818-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FzQlpIJEeu8x5yl0OLuXn%2Fuploads%2Fgit-blob-9722765ba1510b72e8875ca56d8b936452d80d58%2Fimage%20(5).png?alt=media" alt=""><figcaption><p>Finalize and create the server</p></figcaption></figure>

6. Access the server's console

After the server is ready, select the `Access console` option from the dropdown list to open a terminal window.

<figure><img src="https://932814818-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FzQlpIJEeu8x5yl0OLuXn%2Fuploads%2Fgit-blob-61594ceff6244d854cb8da2c48fe84dcbbe92669%2Fimage.png?alt=media" alt=""><figcaption><p>Access the server's console</p></figcaption></figure>

### Install Docker Engine and Docker Compose

From the terminal window, run the following commands to install Docker and Docker Compose.

```bash
sudo apt-get update
sudo apt-get install ca-certificates curl gnupg lsb-release
sudo mkdir -p /etc/apt/keyrings
curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo gpg --dearmor -o /etc/apt/keyrings/docker.gpg
echo \
  "deb [arch=$(dpkg --print-architecture) signed-by=/etc/apt/keyrings/docker.gpg] https://download.docker.com/linux/ubuntu \
  $(lsb_release -cs) stable" | sudo tee /etc/apt/sources.list.d/docker.list > /dev/null
sudo apt-get update
sudo apt-get install docker-ce docker-ce-cli containerd.io docker-compose-plugin

# Now install docker-compose
sudo apt-get update
sudo apt-get install docker-compose-plugin
```

### Install Kubernetes with Docker Engine

Kubernetes is an orchestration engine for containerized applications and the initial setup is dependent on the platform on which it is deployed - presenting how this product must be installed and configured is outside the scope of this document.

For cloud deployment, most of the cloud providers have dedicated turnkey solutions for Kubernetes. A comprehensive list of such cloud providers is presented [here](https://kubernetes.io/docs/setup/production-environment/turnkey-solutions/).

For an on-premise deployment of Kubernetes, please refer to this [link](https://kubernetes.io/docs/setup/).

Now that the execution environment is prepared and the prerequisites installed, we can proceed to deploy the Ocean's components.


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