Getting Started with zot Administration¶

This document helps you to deploy an appropriate zot image or to build zot if desired.

After deploying zot, proceed to Configuring zot to choose and configure the features you need.

Installing zot¶

How to get zot¶

The zot project is hosted on GitHub at project-zot. From GitHub, you can download zot executable binary images or full source code.

Supported platforms¶

zot is officially supported on Linux and Apple MacOS platforms, using Intel or ARM processors. However, development should be possible on any platform that supports the golang toolchain.

About binary images¶

Executable binary zot images are available for multiple platforms and architectures and with full or minimal implementations.

Refer to Released Images for zot for information about available zot images along with information about image variations, image locations, and image naming formats.

Deployment methods¶

Several options exist for deploying zot:

• You can launch a zot binary as a container service using a container management tool such as Podman, Docker, or Helm.

• You can launch zot as a host-level service by downloading a binary image and running it as a systemd service.

• You can copy or clone the full zot source code and build an image with custom build flags.

Deploying a zot binary image¶

Executable binary images for supported server platforms and architectures are available from the zot package repository in GitHub.

You can download the appropriate binary image and run it directly on your server, or you can use a container management tool such as Podman, runc, Helm, or Docker to fetch and deploy the image in a container on your server.

For convenience, you can rename the binary image file to simply zot.

Example: Deploying with a container manager¶

Using a container manager such as Podman, runc, Helm, or Docker, you can install a zot binary image, as in the following examples.

Using podman

podman run -p 5000:5000 ghcr.io/project-zot/zot-linux-amd64:latest

podman run -p 5000:5000 ghcr.io/project-zot/zot-minimal-linux-amd64:latest

Using docker

docker run -p 5000:5000 ghcr.io/project-zot/zot-linux-amd64:latest

Each of these example commands pulls a zot binary image from the GitHub Container Registry (ghcr.io) and launches a zot image registry at http://localhost:5000.

Building zot from source¶

Prerequisites¶

Install golang (1.19+)¶

The zot project requires golang 1.19 or newer. You can follow the golang instructions to install the golang toolchain. After installation, make sure that the path environment variable or your IDE can find the toolchain.

Building an executable binary from source¶

Download or clone the full zot project from GitHub at project-zot. To clone the zot project from GitHub, use this command:

git clone https://github.com/project-zot/zot.git

To build zot, execute the make command in the zot directory using the following general syntax:

make OS=os ARCH=architecture {binary | binary-minimal}

• The operating system and architecture options are listed in the Supported platforms and architectures table. If an option is not specified, the defaults are linux and amd64.

• The binary option builds the full zot binary image with all extensions.

• The binary-minimal option builds the minimal distribution-spec conformant zot binary image without extensions, reducing the attack surface.

For example, to build a zot image with extensions for an Intel-based linux server, use the following command:

make OS=linux ARCH=amd64 binary

The make command builds an executable image in the zot/bin directory. The original filename of the zot executable image will indicate the build options. For example, the filename of an Intel-based linux minimal image is zot-linux-amd64-minimal.

For convenience, you can rename the binary image file to simply zot.

Building a zot container image from source¶

with Stacker

Using the settings in stacker.yaml, you can build a container image that runs the latest zot by running the following command:

make binary-stacker

with Docker

A sample Dockerfile is provided on the zot project page in GitHub. You can edit the sample file with your specific values, such as the desired operating system, hardware architecture, and full or minimal build, as in this example:

ARG OS=linux
ARG ARCH=amd64

RUN make COMMIT=$COMMIT OS=$OS ARCH=$ARCH clean binary-minimal

Using your edited Dockerfile, you can build a container image that runs the latest zot by running the following command:

make image

Deploying the container image¶

Deploy the image using your container manager, such as Podman, runc, Helm, or Docker, as in these examples:

with Podman

podman run --rm -it -p 5000:5000 -v $(pwd)/registry:/var/lib/registry zot:latest

with Docker

docker run --rm -it -p 5000:5000 -v $(pwd)/registry:/var/lib/registry zot:latest

A container image built with the sample Dockerfile and deployed with the example command results in a running registry at http://localhost:5000. Registry content is stored at .registry, which is bind mounted to /var/lib/registry in the container. By default, auth is disabled. As part of the build, a YAML configuration file is created at /etc/zot/config.yml in the container.

You can override the configuration file with custom configuration settings in the deployment command and in a local configuration file as shown in this example:

podman run --rm -p 8080:8080 \
  -v $(pwd)/custom-config.yml:/etc/zot/config.yml \
  -v $(pwd)/registry:/tmp/zot \
  zot:latest

This command causes the registry to listen on port 8080 and to use /tmp/zot for content storage.

Additional recommended steps¶

We recommend that, when deploying zot, you also install the command line (zli) and benchmarking (zb) packages.

Launching zot¶

The zot service is initiated with the zot serve command followed by the name of a configuration file, as in this example:

zot serve config.yml

For convenience, you can rename the binary image file to simply zot.The instructions and examples in this guide use zot as the name of the zot executable file and do not include the path to the executable file.

Next Steps¶

Configuring zot¶

You configure zot primarily through adding and modifying settings in the zot configuration file. The configuration file is a JSON or YAML file that contains all configuration settings for zot functions.

When you first build zot or deploy an image or container from the distribution, a basic configuration file config.json is created. You can modify the initial file or you can create a new file.

Follow the instructions in Configuring zot, to compose a configuration file with the settings and features you require for your zot registry server.