kraken
nerdctl
kraken | nerdctl | |
---|---|---|
14 | 33 | |
5,852 | 7,418 | |
0.7% | 1.4% | |
3.5 | 9.6 | |
8 days ago | 2 days ago | |
Go | Go | |
Apache License 2.0 | Apache License 2.0 |
Stars - the number of stars that a project has on GitHub. Growth - month over month growth in stars.
Activity is a relative number indicating how actively a project is being developed. Recent commits have higher weight than older ones.
For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.
kraken
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BTFS (BitTorrent Filesystem)
https://github.com/uber/kraken?tab=readme-ov-file#comparison...
"Kraken was initially built with a BitTorrent driver, however, we ended up implementing our P2P driver based on BitTorrent protocol to allow for tighter integration with storage solutions and more control over performance optimizations.
Kraken's problem space is slightly different than what BitTorrent was designed for. Kraken's goal is to reduce global max download time and communication overhead in a stable environment, while BitTorrent was designed for an unpredictable and adversarial environment, so it needs to preserve more copies of scarce data and defend against malicious or bad behaving peers.
Despite the differences, we re-examine Kraken's protocol from time to time, and if it's feasible, we hope to make it compatible with BitTorrent again."
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Resilient image cache/mirror
Kraken seems unmaintained: https://github.com/uber/kraken/issues/313
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DockerHub replacement stratagy and options
For within your boundary of control, whether that be r/selfhosting, r/homelab, or enterprise a small registry or something like uber's kraken registry makes more sense.
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Docker is deleting Open Source organisations - what you need to know
First hit on Google is https://github.com/uber/kraken Did not know such thing exists.
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MinIO passes 1B cumulative Docker Pulls
Uber Engineering open-sourced Kraken [1], their peer-to-peer docker registry. I remember it originally using the BitTorrent protocol but in their readme they now say it is "based on BitTorrent" due to different tradeoffs they needed to make.
As far as I know there aren't any projects doing peer-to-peer distribution of container images to servers, probably because it's useful to be able to use a stock docker daemon on your server. The Kraken page references Dragonfly [2] but I haven't grokked it yet, it might be that.
It's also possible that in practice you'd want your CI nodes optimized for compute because they're doing a lot of work, your registry hosts for bandwidth, and your servers again for compute, and having one daemon to rule them all seems elegant but is actually overgeneralized, and specialization is better.
1 https://github.com/uber/kraken
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Ask HN: Have You Left Kubernetes?
If you're pulling big images you could try kube-fledged (it's the simplest option, a CRD that works like a pre-puller for your images), or if you have a big cluster you can try a p2p distributor, like kraken or dragonfly2.
Also there's that project called Nydus that allows starting up big containers way faster. IIRC, starts the container before pulling the whole image, and begins to pull data as needed from the registry.
https://github.com/senthilrch/kube-fledged
https://github.com/dragonflyoss/Dragonfly2
https://github.com/uber/kraken
https://nydus.dev/
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Kube-fledged: Cache Container Images in Kubernetes
Uber Kraken: Kraken is a P2P Docker registry capable of distributing TBs of data in seconds (URL: https://github.com/uber/kraken)
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How to handle registry outages ? Registry outage contingency plans ?
Might want to consider a private p2p solution like https://github.com/uber/kraken or similar.
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How to handle locally build container images across nodes? Container Registry the only way?
Cost, availability, upkeep. Same as any other service. There are alternatives… https://github.com/uber/kraken
- Can Kubernetes pre-pull and cache images?
nerdctl
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Colima k8s nix setup
What about the docker-cli? colima also ships with a docker-compatible cli to interact with containerd called nerdctl. We can execute the same docker cli commands like:
- Nerdctl v2 Beta
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Nginx Unit – Universal web app server
Using nerdctl: https://github.com/containerd/nerdctl
I'd really disagree that compose files are somehow one-shot, or blindly modified. To the contrary, really, we have them checked in with the source code. Upon deployment to the cluster, the (running) services will be intelligently updated or replaced (in a rolling manner, causing zero downtime). LXC might be more elegant, but I have no idea what simple, file-based format I could use to let engineers describe the environment their app should run in without compose.
I need something that even junior devs can start up with a single command, that can be placed in the VCS along with the code, and that will not require deep Linux knowledge to get running. Open for suggestions here, really.
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Jenkins Agents On Kubernetes
Now since Kubernetes works off of containerd I'll be taking a different approach on handling container builds by using nerdctl and the buildkit that comes bundled with it. I'll do this on the amd64 control plane node since it's beefier than my Raspberry Pi workers for handling builds and build related services. Go ahead and download and unpack the latest nerdctl release as of writing (make sure to check the release page in case there's a new one):
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Going through a Kubernetes training with autogenerated captions and about half are coming up like this.
That's why nerdctl, their cli binary, is so well named.
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Python + containerd? Who might be interested?
Well, it is indeed a good option. However, containerd is a good alternative that is growing even among developers. Please see: https://github.com/containerd/nerdctl
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How to own your own Docker Registry address
Nerdctl/containerd has IPFS support :)
https://github.com/containerd/nerdctl/blob/main/docs/ipfs.md
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DockerHub replacement stratagy and options
nerdctl supports IPFS for both image pulling and pushing, including encrypted images and eStargz lazy pulling. For building, the current method is a locally hosted translator so that the traditional pulls can be converted to work over IPFS. They even have docs on running it on k8s node, though if my reading is correct this isn't exactly a cloud native approach (running systemd services on each node...).
- Docker's deleting Open Source images and here's what you need to know
- Release v1.0.0 · containerd/nerdctl
What are some alternatives?
Dragonfly - This repository has be archived and moved to the new repository https://github.com/dragonflyoss/Dragonfly2.
lima - Linux virtual machines, with a focus on running containers
kube-fledged - A kubernetes operator for creating and managing a cache of container images directly on the cluster worker nodes, so application pods start almost instantly
podman-compose - a script to run docker-compose.yml using podman
containers-roadmap - This is the public roadmap for AWS container services (ECS, ECR, Fargate, and EKS).
kaniko - Build Container Images In Kubernetes
deckschrubber - Deckschrubber inspects images of a Docker Registry and removes those older than a given age. :high_brightness::ship:
podman - Podman: A tool for managing OCI containers and pods.
image-cache-daemon
Moby - The Moby Project - a collaborative project for the container ecosystem to assemble container-based systems
ipdr - 🐋 IPFS-backed Docker Registry
k3s - Lightweight Kubernetes