Install Docker for Linux

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In this microlearning, we will focus on how an on-premises server can be prepared for a eMagiz Deploy agent installation.

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Should you have any questions, please contact [[academy@emagiz.com>>mailto:academy@emagiz.com]].

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== 1. Prerequisites ==

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* Advanced knowledge of the eMagiz platform

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* Good understanding of eMagiz runtimes in general

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== 2. Key concepts ==

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In the new runtime architecture of eMagiz, Docker technology is used to deploy runtimes. eMagiz creates specific runtime images that contain the eMagiz runtime, and can be deployed in dockerized environments.

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In the below section the Linux variant is described in terms of how to prepare the server to allow the [[eMagiz Deploy Agent>>doc:Main.eMagiz Academy.Microlearnings.Intermediate Level.eMagiz Runtime Management.intermediate-runtime-management-deploy-agent.WebHome||target="blank"]] to be installed. That agent allows to download images from the eMagiz infrastructure.

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== 3. On-premises deployments ==

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===3.1 General requirements===

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These are the general requirements to allow the installation of the eMagiz Docker agent:

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* Ensure access to the following URLs is enabled

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** registry.emagiz.com:443

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** controlplane.emagiz.com:8000

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** Preferably the entry should be *.emagiz.com

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===3.2 Installation Linux===

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Whenever Linux is selected as operating system, the latest version of Ubuntu will work. Other Linux distributions will also work such as Debian or Red Hat.

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==== 3.2.1 Set up Docker's apt repository ====

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# Add Docker's official GPG key:

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sudo apt-get update

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sudo apt-get install ca-certificates curl

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sudo install -m 0755 -d /etc/apt/keyrings

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sudo curl -fsSL https://download.docker.com/linux/ubuntu/gpg -o /etc/apt/keyrings/docker.asc

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sudo chmod a+r /etc/apt/keyrings/docker.asc

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# Add the repository to Apt sources:

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echo \

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"deb [arch=$(dpkg --print-architecture) signed-by=/etc/apt/keyrings/docker.asc] https://download.docker.com/linux/ubuntu \

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$(. /etc/os-release && echo "$VERSION_CODENAME") stable" | \

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sudo tee /etc/apt/sources.list.d/docker.list > /dev/null

sudo apt-get update

==== 3.2.2 Install Docker ====

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sudo apt-get install docker-ce docker-ce-cli containerd.io docker-buildx-plugin docker-compose-plugin

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==== 3.2.3 Verify succesfull installation of the Docker Engine ====

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sudo docker run hello-world

Requires ~335 Mb space to install

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==== 3.2.4 Install eMagiz Deploy Agent ====

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Install the eMagiz Deploy agent as can be found in this [[microlearning>>doc:Main.eMagiz Academy.Microlearnings.Intermediate Level.eMagiz Runtime Management.intermediate-runtime-management-deploy-agent.WebHome||target="blank"]]

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== 4. Key takeaways ==

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* eMagiz uses runtime images to deploy emagiz runtime on dockerized environments. The runtime image holds all the information and components required to run the runtime

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* eMagiz has a specific agent that manages the download of that image to the on-premises server

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* The firewall of the on-premises environment should allow outgoing traffic without any restriction. In case that is not desirable, eMagiz can provide the addresses and ports needed to setup the right firewall rules.

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== 5. Suggested Additional Readings ==

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* Docker command line cheatsheet: [[image:Main.Images.Microlearning.WebHome@docker-cheatsheet.png]]

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* [[Docker official installation guide>>https://docs.docker.com/engine/install/ubuntu/||target="blank"]]

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