README ΒΆ
KraftKit πππ§°
KraftKit provides a suite of tools and Go-based framework for building custom, minimal, immutable lightweight unikernel virtual machines based on Unikraft: a fast, secure and open-source library operating system.
With KraftKit, you can easily leverage Unikraft and manage specialized, high-performance applications at every stage of their lifecycle: from construction to production.
- Getting started guide π
- Key differences between containers and unikernels π€
- Join
#kraftkit
on Unikraft's Community Discord πΎ
There are many benefits in running your application as a unikernel: for more information about the performance of unikernels π, the added security π and a positive impact on the environment π± please check out Unikraft's documentation and the introductory chapters on these impacts
Features
- π₯ Native Firecracker MicroVM support;
- π Pre-built unikernel app catalog;
- π€ΉββοΈ Daemonless unikernel VM instance manager;
- π¦ OCI packaging and distribution support;
- π ELF binary / POSIX-compatibility support;
- π§° Go SDK for building unikernels programmatically; and
- π much more!
Installation
You can quickly and easily install KraftKit using the interactive installer. Simply run the following command to get started:
curl --proto '=https' --tlsv1.2 -sSf https://get.kraftkit.sh | sh
Alternatively, you can download the binaries from the releases pages.
See additional installation instructions.
See also the hacking documentation on how to build KraftKit from source.
Container build environment
KraftKit ships a container build environment which you can use instead of installing any dependencies directly on your host.
It includes the kraft
binary as well as all the additional tools and libraries for building Unikraft unikernels.
Simply attach a working directory on your host as a mount path volume mapped to /workspace
, e.g.:
docker run -it --rm -v $(pwd):/workspace --entrypoint bash kraftkit.sh/base:latest
The above command will drop you into a container shell.
Simply type exit
or Ctrl+D to quit.
Quickstart
Running unikernels with kraft
is designed to be simple and familiar.
To test your installation of kraft
, you can run the following:
kraft run unikraft.org/helloworld:latest
Building unikernels is also designed to be simple. You can find some common project examples below:
Find more examples and applications in our community catalog!
Use in GitHub Actions
KraftKit can be used to automatically build your application into a unikernel in a GitHub Actions workflow, simply use
unikraft/kraftkit@staging
.
In the following example, a repository that has been initialized with a top-level Kraftfile
that contains a target for qemu/x86_64 will be built every time a PR is opened, synchronized or re-opened:
name: example
on:
pull_request:
types: [opened, synchronize, reopened]
jobs:
build:
steps:
- uses: actions/checkout@v4
- uses: unikraft/kraftkit@staging
with:
workdir: .
kraftfile: Kraftfile
arch: x86_64
plat: qemu
For other CI's and integrations, including GitLab, check out the getting started guide.
Support, Community & Meetings
If you have any further questions or need more information about KraftKit or Unikraft, please refer to the official Unikraft documentation or ask for help on the Unikraft community forum.
A KraftKit Working Group (WG) meets every other Wednesday at 13:00 PM (CET) on Discord. Invites and additional details are available on the Unikraft OSS Public calendar.
License
KraftKit is part of the Unikraft OSS Project and licensed under BSD-3-Clause
.
Directories ΒΆ
Path | Synopsis |
---|---|
SPDX-License-Identifier: BSD-3-Clause Copyright (c) 2022, Unikraft GmbH and The KraftKit Authors.
|
SPDX-License-Identifier: BSD-3-Clause Copyright (c) 2022, Unikraft GmbH and The KraftKit Authors. |
compose/v1
SPDX-License-Identifier: BSD-3-Clause Copyright (c) 2024, Unikraft GmbH and The KraftKit Authors.
|
SPDX-License-Identifier: BSD-3-Clause Copyright (c) 2024, Unikraft GmbH and The KraftKit Authors. |
machine
SPDX-License-Identifier: BSD-3-Clause Copyright (c) 2022, Unikraft GmbH and The KraftKit Authors.
|
SPDX-License-Identifier: BSD-3-Clause Copyright (c) 2022, Unikraft GmbH and The KraftKit Authors. |
machine/v1alpha1
SPDX-License-Identifier: BSD-3-Clause Copyright (c) 2022, Unikraft GmbH and The KraftKit Authors.
|
SPDX-License-Identifier: BSD-3-Clause Copyright (c) 2022, Unikraft GmbH and The KraftKit Authors. |
network
SPDX-License-Identifier: BSD-3-Clause Copyright (c) 2022, Unikraft GmbH and The KraftKit Authors.
|
SPDX-License-Identifier: BSD-3-Clause Copyright (c) 2022, Unikraft GmbH and The KraftKit Authors. |
network/v1alpha1
SPDX-License-Identifier: BSD-3-Clause Copyright (c) 2022, Unikraft GmbH and The KraftKit Authors.
|
SPDX-License-Identifier: BSD-3-Clause Copyright (c) 2022, Unikraft GmbH and The KraftKit Authors. |
volume
SPDX-License-Identifier: BSD-3-Clause Copyright (c) 2022, Unikraft GmbH and The KraftKit Authors.
|
SPDX-License-Identifier: BSD-3-Clause Copyright (c) 2022, Unikraft GmbH and The KraftKit Authors. |
volume/v1alpha1
SPDX-License-Identifier: BSD-3-Clause Copyright (c) 2022, Unikraft GmbH and The KraftKit Authors.
|
SPDX-License-Identifier: BSD-3-Clause Copyright (c) 2022, Unikraft GmbH and The KraftKit Authors. |
SPDX-License-Identifier: BSD-3-Clause Copyright (c) 2022, Unikraft GmbH and The KraftKit Authors.
|
SPDX-License-Identifier: BSD-3-Clause Copyright (c) 2022, Unikraft GmbH and The KraftKit Authors. |
cmd
|
|
runu
SPDX-License-Identifier: BSD-3-Clause Copyright (c) 2023, Unikraft GmbH and The KraftKit Authors.
|
SPDX-License-Identifier: BSD-3-Clause Copyright (c) 2023, Unikraft GmbH and The KraftKit Authors. |
SPDX-License-Identifier: MIT Copyright (c) 2019, 2019 GitHub Inc.
|
SPDX-License-Identifier: MIT Copyright (c) 2019, 2019 GitHub Inc. |
Package compose provides primitives for running Unikraft applications via the Compose specification.
|
Package compose provides primitives for running Unikraft applications via the Compose specification. |
SPDX-License-Identifier: BSD-3-Clause Copyright (c) 2022, Unikraft GmbH and The KraftKit Authors.
|
SPDX-License-Identifier: BSD-3-Clause Copyright (c) 2022, Unikraft GmbH and The KraftKit Authors. |
Package cpio providers readers and writers for CPIO archives.
|
Package cpio providers readers and writers for CPIO archives. |
SPDX-License-Identifier: BSD-3-Clause Copyright (c) 2022, Unikraft GmbH and The KraftKit Authors.
|
SPDX-License-Identifier: BSD-3-Clause Copyright (c) 2022, Unikraft GmbH and The KraftKit Authors. |
SPDX-License-Identifier: BSD-3-Clause Copyright (c) 2022, Unikraft GmbH and The KraftKit Authors.
|
SPDX-License-Identifier: BSD-3-Clause Copyright (c) 2022, Unikraft GmbH and The KraftKit Authors. |
internal
|
|
SPDX-License-Identifier: BSD-3-Clause Copyright (c) 2022, Unikraft GmbH and The KraftKit Authors.
|
SPDX-License-Identifier: BSD-3-Clause Copyright (c) 2022, Unikraft GmbH and The KraftKit Authors. |
specconv
Package specconv implements conversion of specifications to libcontainer configurations
|
Package specconv implements conversion of specifications to libcontainer configurations |
unikraft
Package unikraft contains libmocktainer code that is not in upstream libcontainer.
|
Package unikraft contains libmocktainer code that is not in upstream libcontainer. |
SPDX-License-Identifier: BSD-3-Clause Copyright (c) 2022, Unikraft GmbH and The KraftKit Authors.
|
SPDX-License-Identifier: BSD-3-Clause Copyright (c) 2022, Unikraft GmbH and The KraftKit Authors. |
machine
|
|
firecracker
SPDX-License-Identifier: BSD-3-Clause Copyright (c) 2022, Unikraft GmbH and The KraftKit Authors.
|
SPDX-License-Identifier: BSD-3-Clause Copyright (c) 2022, Unikraft GmbH and The KraftKit Authors. |
name
SPDX-License-Identifier: BSD-3-Clause Copyright (c) 2022, Unikraft GmbH and The KraftKit Authors.
|
SPDX-License-Identifier: BSD-3-Clause Copyright (c) 2022, Unikraft GmbH and The KraftKit Authors. |
network
SPDX-License-Identifier: BSD-3-Clause Copyright (c) 2024, Unikraft GmbH and The KraftKit Authors.
|
SPDX-License-Identifier: BSD-3-Clause Copyright (c) 2024, Unikraft GmbH and The KraftKit Authors. |
network/bridge
SPDX-License-Identifier: BSD-3-Clause Copyright (c) 2022, Unikraft GmbH and The KraftKit Authors.
|
SPDX-License-Identifier: BSD-3-Clause Copyright (c) 2022, Unikraft GmbH and The KraftKit Authors. |
network/macaddr
SPDX-License-Identifier: BSD-3-Clause Copyright (c) 2022, Unikraft GmbH and The KraftKit Authors.
|
SPDX-License-Identifier: BSD-3-Clause Copyright (c) 2022, Unikraft GmbH and The KraftKit Authors. |
platform
SPDX-License-Identifier: BSD-3-Clause Copyright (c) 2022, Unikraft GmbH and The KraftKit Authors.
|
SPDX-License-Identifier: BSD-3-Clause Copyright (c) 2022, Unikraft GmbH and The KraftKit Authors. |
qemu
SPDX-License-Identifier: BSD-3-Clause Copyright (c) 2022, Unikraft GmbH and The KraftKit Authors.
|
SPDX-License-Identifier: BSD-3-Clause Copyright (c) 2022, Unikraft GmbH and The KraftKit Authors. |
volume
SPDX-License-Identifier: BSD-3-Clause Copyright (c) 2024, Unikraft GmbH and The KraftKit Authors.
|
SPDX-License-Identifier: BSD-3-Clause Copyright (c) 2024, Unikraft GmbH and The KraftKit Authors. |
volume/9pfs
SPDX-License-Identifier: BSD-3-Clause Copyright (c) 2022, Unikraft GmbH and The KraftKit Authors.
|
SPDX-License-Identifier: BSD-3-Clause Copyright (c) 2022, Unikraft GmbH and The KraftKit Authors. |
SPDX-License-Identifier: BSD-3-Clause Copyright (c) 2022, Unikraft GmbH and The KraftKit Authors.
|
SPDX-License-Identifier: BSD-3-Clause Copyright (c) 2022, Unikraft GmbH and The KraftKit Authors. |
SPDX-License-Identifier: BSD-3-Clause Copyright (c) 2022, Unikraft GmbH and The KraftKit Authors.
|
SPDX-License-Identifier: BSD-3-Clause Copyright (c) 2022, Unikraft GmbH and The KraftKit Authors. |
SPDX-License-Identifier: BSD-3-Clause Copyright (c) 2022, Unikraft GmbH and The KraftKit Authors.
|
SPDX-License-Identifier: BSD-3-Clause Copyright (c) 2022, Unikraft GmbH and The KraftKit Authors. |
cache
SPDX-License-Identifier: BSD-3-Clause Copyright (c) 2024, Unikraft GmbH and The KraftKit Authors.
|
SPDX-License-Identifier: BSD-3-Clause Copyright (c) 2024, Unikraft GmbH and The KraftKit Authors. |
handler
SPDX-License-Identifier: BSD-3-Clause Copyright (c) 2022, Unikraft GmbH and The KraftKit Authors.
|
SPDX-License-Identifier: BSD-3-Clause Copyright (c) 2022, Unikraft GmbH and The KraftKit Authors. |
simpleauth
Package simpleauth implements a basic pass-by-reference of credentials for the authn.Authenticator interface.
|
Package simpleauth implements a basic pass-by-reference of credentials for the authn.Authenticator interface. |
SPDX-License-Identifier: BSD-3-Clause Copyright (c) 2022, Unikraft GmbH and The KraftKit Authors.
|
SPDX-License-Identifier: BSD-3-Clause Copyright (c) 2022, Unikraft GmbH and The KraftKit Authors. |
SPDX-License-Identifier: BSD-3-Clause Copyright (c) 2022, Unikraft GmbH and The KraftKit Authors.
|
SPDX-License-Identifier: BSD-3-Clause Copyright (c) 2022, Unikraft GmbH and The KraftKit Authors. |
SPDX-License-Identifier: BSD-3-Clause Copyright (c) 2022, Unikraft GmbH and The KraftKit Authors.
|
SPDX-License-Identifier: BSD-3-Clause Copyright (c) 2022, Unikraft GmbH and The KraftKit Authors. |
test
|
|
e2e/framework/config
Package config provides facilities for manipulating kraftkit configuration files on the local filesystem.
|
Package config provides facilities for manipulating kraftkit configuration files on the local filesystem. |
e2e/framework/matchers
Package matchers contains additional Gomega matchers.
|
Package matchers contains additional Gomega matchers. |
tools
|
|
dockerfile-llb-frontend
Module
|
|
github-action
Module
|
|
go-generate-qemu-devices
Module
|
|
protoc-gen-go-netconn
Module
|
|
SPDX-License-Identifier: BSD-3-Clause Copyright (c) 2022, Unikraft GmbH and The KraftKit Authors.
|
SPDX-License-Identifier: BSD-3-Clause Copyright (c) 2022, Unikraft GmbH and The KraftKit Authors. |
paraprogress
SPDX-License-Identifier: BSD-3-Clause Copyright (c) 2022, Unikraft GmbH and The KraftKit Authors.
|
SPDX-License-Identifier: BSD-3-Clause Copyright (c) 2022, Unikraft GmbH and The KraftKit Authors. |
processtree
SPDX-License-Identifier: BSD-3-Clause Copyright (c) 2022, Unikraft GmbH and The KraftKit Authors.
|
SPDX-License-Identifier: BSD-3-Clause Copyright (c) 2022, Unikraft GmbH and The KraftKit Authors. |
SPDX-License-Identifier: BSD-3-Clause Copyright (c) 2022, Unikraft GmbH and The KraftKit Authors.
|
SPDX-License-Identifier: BSD-3-Clause Copyright (c) 2022, Unikraft GmbH and The KraftKit Authors. |
app
SPDX-License-Identifier: BSD-3-Clause Copyright (c) 2022, Unikraft GmbH and The KraftKit Authors.
|
SPDX-License-Identifier: BSD-3-Clause Copyright (c) 2022, Unikraft GmbH and The KraftKit Authors. |
app/volume
SPDX-License-Identifier: BSD-3-Clause Copyright (c) 2022, Unikraft GmbH and The KraftKit Authors.
|
SPDX-License-Identifier: BSD-3-Clause Copyright (c) 2022, Unikraft GmbH and The KraftKit Authors. |
arch
SPDX-License-Identifier: BSD-3-Clause Copyright (c) 2022, Unikraft GmbH and The KraftKit Authors.
|
SPDX-License-Identifier: BSD-3-Clause Copyright (c) 2022, Unikraft GmbH and The KraftKit Authors. |
component
SPDX-License-Identifier: BSD-3-Clause Copyright (c) 2022, Unikraft GmbH and The KraftKit Authors.
|
SPDX-License-Identifier: BSD-3-Clause Copyright (c) 2022, Unikraft GmbH and The KraftKit Authors. |
core
SPDX-License-Identifier: BSD-3-Clause Copyright (c) 2022, Unikraft GmbH and The KraftKit Authors.
|
SPDX-License-Identifier: BSD-3-Clause Copyright (c) 2022, Unikraft GmbH and The KraftKit Authors. |
export/v0/posixenviron
SPDX-License-Identifier: BSD-3-Clause Copyright (c) 2024, Unikraft GmbH and The KraftKit Authors.
|
SPDX-License-Identifier: BSD-3-Clause Copyright (c) 2024, Unikraft GmbH and The KraftKit Authors. |
export/v0/ukargparse
SPDX-License-Identifier: BSD-3-Clause Copyright (c) 2022, Unikraft GmbH and The KraftKit Authors.
|
SPDX-License-Identifier: BSD-3-Clause Copyright (c) 2022, Unikraft GmbH and The KraftKit Authors. |
export/v0/uknetdev
SPDX-License-Identifier: BSD-3-Clause Copyright (c) 2022, Unikraft GmbH and The KraftKit Authors.
|
SPDX-License-Identifier: BSD-3-Clause Copyright (c) 2022, Unikraft GmbH and The KraftKit Authors. |
export/v0/vfscore
SPDX-License-Identifier: BSD-3-Clause Copyright (c) 2022, Unikraft GmbH and The KraftKit Authors.
|
SPDX-License-Identifier: BSD-3-Clause Copyright (c) 2022, Unikraft GmbH and The KraftKit Authors. |
lib
SPDX-License-Identifier: BSD-3-Clause Copyright (c) 2022, Unikraft GmbH and The KraftKit Authors.
|
SPDX-License-Identifier: BSD-3-Clause Copyright (c) 2022, Unikraft GmbH and The KraftKit Authors. |
plat
SPDX-License-Identifier: BSD-3-Clause Copyright (c) 2022, Unikraft GmbH and The KraftKit Authors.
|
SPDX-License-Identifier: BSD-3-Clause Copyright (c) 2022, Unikraft GmbH and The KraftKit Authors. |
runtime
SPDX-License-Identifier: BSD-3-Clause Copyright (c) 2022, Unikraft GmbH and The KraftKit Authors.
|
SPDX-License-Identifier: BSD-3-Clause Copyright (c) 2022, Unikraft GmbH and The KraftKit Authors. |
target
SPDX-License-Identifier: BSD-3-Clause Copyright (c) 2022, Unikraft GmbH and The KraftKit Authors.
|
SPDX-License-Identifier: BSD-3-Clause Copyright (c) 2022, Unikraft GmbH and The KraftKit Authors. |
template
SPDX-License-Identifier: BSD-3-Clause Copyright (c) 2022, Unikraft GmbH and The KraftKit Authors.
|
SPDX-License-Identifier: BSD-3-Clause Copyright (c) 2022, Unikraft GmbH and The KraftKit Authors. |