spegel
nerdctl
spegel | nerdctl | |
---|---|---|
8 | 33 | |
810 | 7,418 | |
6.9% | 1.4% | |
9.4 | 9.6 | |
5 days ago | 2 days ago | |
Go | Go | |
MIT License | 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.
spegel
- BTFS (BitTorrent Filesystem)
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Using ECR as a mirror to transparently proxy docker-hub when rate limited
I’m trying out spegel, so far, it’s been great
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Constantly re-pulling the same image(s)?
As other stated, check disk space, PullPolicy etc. However, local caching can be done using tools like Spegel that makes sure each node gets all images used in the cluster for faster restarts.
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Pull through cache, like AWS just announced
I also recently found spegel, where each Cluster Node provides its images to the other nodes: https://github.com/XenitAB/spegel
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Docker's deleting Open Source images and here's what you need to know
https://github.com/xenitAB/spegel
I have avoided a couple of incidents caused by images being removed or momentarily not reachable with it. It would at least mitigate any immediate issues caused by images being removed from Docker Hub.
- I created Spegel to enable nodes in a cluster to pull images from each other
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?
Harbor - An open source trusted cloud native registry project that stores, signs, and scans content.
lima - Linux virtual machines, with a focus on running containers
crow-registry
podman-compose - a script to run docker-compose.yml using podman
bottlerocket - An operating system designed for hosting containers
kaniko - Build Container Images In Kubernetes
ipcs - containerd meets ipfs to distribute content
podman - Podman: A tool for managing OCI containers and pods.
lmctfy - lmctfy is the open source version of Google’s container stack, which provides Linux application containers.
Moby - The Moby Project - a collaborative project for the container ecosystem to assemble container-based systems
distribution-spec - OCI Distribution Specification
k3s - Lightweight Kubernetes