uds-cli

README

UDS-CLI

⚠ Warning: UDS-CLI is in early alpha, expect changes to the schema and workflow

Table of Contents

1. Install
2. Quickstart
   • Create
   • Deploy
   • Inspect
   • Publish
   • Remove
   • Logs
3. Bundle Architecture and Multi-Arch Support
4. Configuration
5. Sharing Variables
6. Zarf Integration
7. Bundle Overrides
8. Bundle Anatomy
9. Runner

Install

Recommended installation method is with Brew:

brew tap defenseunicorns/tap && brew install uds

UDS CLI Binaries are also included with each Github Release

Quickstart

The UDS-CLI's flagship feature is deploying multiple, independent Zarf packages. To create a UDSBundle of Zarf packages, create a uds-bundle.yaml file like so:

kind: UDSBundle
metadata:
  name: example
  description: an example UDS bundle
  version: 0.0.1

packages:
  - name: init
    repository: ghcr.io/defenseunicorns/packages/init
    ref: v0.32.3
    optionalComponents:
      - git-server
  - name: podinfo
    repository: ghcr.io/defenseunicorns/uds-cli/podinfo
    ref: 0.0.1

The above UDSBundle deploys the Zarf init package and podinfo.

The packages referenced in packages can exist either locally or in an OCI registry. See here for an example that deploys both local and remote Zarf packages. More UDSBundle examples can be found in the src/test/bundles folder.

Declarative Syntax

The syntax of a uds-bundle.yaml is entirely declarative. As a result, the UDS CLI will not prompt users to deploy optional components in a Zarf package. If you want to deploy an optional Zarf component, it must be specified in the optionalComponents key of a particular package.

First-class UDS Support

When running deploy,inspect,remove, and pull commands, UDS CLI contains shorthand for interacting with the Defense Unicorns org on GHCR. Specifically, unless otherwise specified, paths will automatically be expanded to the Defense Unicorns org on GHCR. For example:

• uds deploy unicorn-bundle:v0.1.0 is equivalent to uds deploy ghcr.io/defenseunicorns/packages/uds/bundles/unicorn-bundle:v0.1.0

The bundle matching and expansion is ordered as follows:

1. Local with a tar.zst extension
2. Remote path: oci://ghcr.io/defenseunicorns/packages/uds/bundles/<path>
3. Remote path: oci://ghcr.io/defenseunicorns/packages/delivery/<path>
4. Remote path: oci://ghcr.io/defenseunicorns/packages/<path>

That is to say, if the bundle is not local, UDS CLI will check path 2, path 3, etc for the remote bundle artifact. This behavior can be overriden by specifying the full path to the bundle artifact, for example uds deploy ghcr.io/defenseunicorns/dev/path/dev-bundle:v0.1.0.

Bundle Create

Pulls the Zarf packages from the registry and bundles them into an OCI artifact.

There are 2 ways to create Bundles:

1. Inside an OCI registry: uds create <dir> -o ghcr.io/defenseunicorns/dev
2. Locally on your filesystem: uds create <dir>

[!NOTE]
The --insecure flag is necessary when interacting with a local registry, but not from secure, remote registries such as GHCR.

Bundle Deploy

Deploys the bundle

There are 2 ways to deploy Bundles:

1. From an OCI registry: uds deploy ghcr.io/defenseunicorns/dev/<name>:<tag>
2. From your local filesystem: uds deploy uds-bundle-<name>.tar.zst

Specifying Packages using --packages

By default all the packages in the bundle are deployed, but you can also deploy only certain packages in the bundle by using the --packages flag.

As an example: uds deploy uds-bundle-<name>.tar.zst --packages init,nginx

Resuming Bundle Deploys using --resume

By default all the packages in the bundle are deployed, regardless of if they have already been deployed, but you can also choose to only deploy packages that have not already been deployed by using the --resume flag

As an example: uds deploy uds-bundle-<name>.tar.zst --resume

Bundle Inspect

Inspect the uds-bundle.yaml of a bundle

1. From an OCI registry: uds inspect oci://ghcr.io/defenseunicorns/dev/<name>:<tag>
2. From your local filesystem: uds inspect uds-bundle-<name>.tar.zst

Viewing SBOMs

There are 2 additional flags for the uds inspect command you can use to extract and view SBOMs:

• Output the SBOMs as a tar file: uds inspect ... --sbom
• Output SBOMs into a directory as files: uds inspect ... --sbom --extract

This functionality will use the sboms.tar of the underlying Zarf packages to create new a bundle-sboms.tar artifact containing all SBOMs from the Zarf packages in the bundle.

Bundle Publish

Local bundles can be published to an OCI registry like so: uds publish <bundle>.tar.zst oci://<registry>

As an example: uds publish uds-bundle-example-arm64-0.0.1.tar.zst oci://ghcr.io/github_user

Bundle Remove

Removes the bundle

There are 2 ways to remove Bundles:

1. From an OCI registry: uds remove oci://ghcr.io/defenseunicorns/dev/<name>:<tag> --confirm
2. From your local filesystem: uds remove uds-bundle-<name>.tar.zst --confirm

By default all the packages in the bundle are removed, but you can also remove only certain packages in the bundle by using the --packages flag.

As an example: uds remove uds-bundle-<name>.tar.zst --packages init,nginx

Logs

[!NOTE]
Only works with uds deploy for now, may work for other operations but isn't guaranteed.

The uds logs command can be used to view the most recent logs of a bundle operation. Note that depending on your OS temporary directory and file settings, recent logs are purged after a certain amount of time, so this command may return an error if the logs are no longer available.

Bundle Architecture and Multi-Arch Support

There are several ways to specify the architecture of a bundle:

1. Setting --architecture or -a flag during uds ... operations: uds create <dir> --architecture arm64
2. Setting the metadata.architecture key in a uds-bundle.yaml
3. Setting a UDS_ARCHITECTURE environment variable
4. Setting the options.architecture key in a uds-config.yaml

Note that the setting the --architecture flag takes precedence over all other methods of specifying the architecture.

UDS CLI supports multi-arch bundles. This means you can push bundles with different architectures to the same remote OCI repository, at the same tag. For example, you can push both an amd64 and arm64 bundle to ghcr.io/<org>/<bundle name>:0.0.1.

Configuration

The UDS CLI can be configured with a uds-config.yaml file. This file can be placed in the current working directory or specified with an environment variable called UDS_CONFIG. The basic structure of the uds-config.yaml is as follows:

options:
   log_level: debug
   architecture: arm64
   no_log_file: false
   no_progress: false
   uds_cache: /tmp/uds-cache
   tmp_dir: /tmp/tmp_dir
   insecure: false
   oci_concurrency: 3

shared:
   domain: uds.dev # shared across all packages in a bundle

variables:
  my-zarf-package:  # name of Zarf package
    ui_color: green # key is not case sensitive and refers to name of Zarf variable
    UI_MSG: "Hello Unicorn"
    hosts:          # variables can be complex types such as lists and maps
       - host: burning.boats
         paths:
            - path: "/"
              pathType: "Prefix"

The options key contains UDS CLI options that are not specific to a particular Zarf package. The variables key contains variables that are specific to a particular Zarf package. If you want to share insensitive variables across multiple Zarf packages, you can use the shared key, where the key is the variable name and the value is the variable value.

Sharing Variables

Importing/Exporting Variables

Zarf package variables can be passed between Zarf packages:

kind: UDSBundle
metadata:
  name: simple-vars
  description: show how vars work
  version: 0.0.1

packages:
  - name: output-var
    repository: localhost:888/output-var
    ref: 0.0.1
    exports:
      - name: OUTPUT
  - name: receive-var
    repository: localhost:888/receive-var
    ref: 0.0.1
    imports:
      - name: OUTPUT
        package: output-var

Variables that you want to make available to other packages are in the export block of the Zarf package to export a variable from. By default, all exported variables are available to all of the packages in a bundle. To have another package ingest a specific exported variable, like in the case of variable name collisions, use the imports key to name both the variable and package that the variable is exported from, like in the example above.

In the example above, the OUTPUT variable is created as part of a Zarf Action in the output-var package, and the receive-var package expects a variable called OUTPUT.

Sharing Variables Across Multiple Packages

If a Zarf variable has the same name in multiple packages and you don't want to set it multiple times via the import/export syntax, you can set an environment variable prefixed with UDS_ and it will be applied to all the Zarf packages in a bundle. For example, if multiple packages require a DOMAIN variable, you could set it once with a UDS_DOMAIN environment variable and it would be applied to all packages. Note that this can also be done with the shared key in the uds-config.yaml file.

On deploy, you can also set package variables by using the --set flag. If the package name isn't included in the key (example: --set super=true) the variable will get applied to all of the packages. If the package name is included in the key (example: --set cool-package.super=true) the variable will only get applied to that package.

Variable Precedence and Specificity

In a bundle, variables can come from 4 sources. Those sources and their precedence are shown below in order of least to most specificity:

• Variables declared in a Zarf pkg
• Variables import'ed from a bundle package's export
• Variables configured in the shared key in a uds-config.yaml
• Variables configured in the variables key in a uds-config.yaml
• Variables set with an environment variable prefixed with UDS_ (ex. UDS_OUTPUT)
• Variables set using the --set flag when running the uds deploy command

That is to say, variables set using the --set flag take precedence over all other variable sources.

Zarf Integration

UDS CLI includes a vendored version of Zarf inside of its binary. To use Zarf, simply run uds zarf <command>. For example, to create a Zarf package, run uds zarf create <dir>, or to use the airgap tooling that Zarf provides, run uds zarf tools <cmd>.

Documentation

Overview

Package main is the entrypoint for the uds binary.