conmon
cri-o
conmon | cri-o | |
---|---|---|
4 | 33 | |
396 | 5,028 | |
1.8% | 0.7% | |
7.7 | 9.8 | |
5 days ago | 1 day ago | |
C | 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.
conmon
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Creating Kubernetes Cluster With CRI-O
It is an open-source, community-driven project which supports OCI-based container registries. It is being maintained by contributors working in Red Hat, Intel, etc. It also comes with a monitoring program known as conmon. Conmon is an OCI container runtime monitor, which makes the communication between CRI-O and runc for a single container.
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Which alternative for slirp4netns in rootless containers is better?
When considering using socket activation it's good to know that socket-activation has the advantage that you can create on-demand services. And in the future you might be able to do container image upgrades without loosing an active TCP connection https://github.com/containers/conmon/issues/393 (Right now it's just a feature request that I wrote).
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Docker is dead?!? Podman - an alternative tool?
This was a wrong assumption. Podman directly uses runC or crun instead of containerd using a technology named conmon. Some more useful information can be found in this article.
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Podman: A Daemonless Container Engine
Well, "daemonless" is kind of marketing - there is still this daemon-per-container 'conmon' thing https://github.com/containers/conmon and I don't get why it is needed because 1) who actually needs to re-attach anyway? 2) container's streams are already properly handled by whatever supervisor (e.g. systemd). You can't disable conmon and I'm not sure if its usage is not hardcoded throughout the codebase.
I would very much like to use Podman as a finally proper container launcher in production (non-FAANG scale - at which you maybe start to need k8s), but having an unnecessary daemon moving part in thousands lines of C makes me frown so far.
cri-o
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The Road To Kubernetes: How Older Technologies Add Up
Kubernetes on the backend used to utilize docker for much of its container runtime solutions. One of the modular features of Kubernetes is the ability to utilize a Container Runtime Interface or CRI. The problem was that Docker didn't really meet the spec properly and they had to maintain a shim to translate properly. Instead users could utilize the popular containerd or cri-o runtimes. These follow the Open Container Initiative or OCI's guidelines on container formats.
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Complexity by Simplicity - A Deep Dive Into Kubernetes Components
Multiple container runtimes are supported, like conatinerd, cri-o, or other CRI compliant runtimes.
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Kubernetes Cluster Setup Using Kubeadm on AWS
Install container runtime on all nodes. We will use cri-o.
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Creating Kubernetes Cluster With CRI-O
Container Runtime Interface (CRI) is one of the important parts of the Kubernetes cluster. It is a plugin interface allowing kubelet to use different container runtimes. And recently CRI-O container runtime has been announced as a CNCF Graduated project. I thought of writing a blog on CRI-O and how to set up a single-node Kubernetes cluster with Kubeadm and CRI-O.
- 32“ E Ink screen that displays daily newspapers on your wall
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Understanding Docker Architecture: A Beginner's Guide to How Docker Works
CRI-O: This is an open-source container runtime designed for use with Kubernetes. It is a lightweight and stable environment for containers. It also complies with the Kubernetes Container Runtime Interface (CRI), making it easy to integrate with Kubernetes.
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How are they doing it?
With CRI-O I believe you can configure registry mirror locations…. Similar to this: https://github.com/cri-o/cri-o/issues/4941
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Docker is deleting Open Source organisations - what you need to know
Alternatives like Podman and CRI-O continue to gain traction and may replace Docker in various places. For example, Kubernetes used to use Docker, then moved to containerd, and now also support CRI-O. Generally speaking, the core features of "Docker" are such a commodity now that no one was the wiser when Kubernetes stopped using it.
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kubeadm init error: CRI v1 runtime API is not implemented
will the site be available for the CKA exam? https://github.com/cri-o/cri-o/blob/main/install.md
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Container Deep Dive 2: Container Engines
The CRI-O container engine provides a stable, more secure, and performant platform for running Open Container Initiative (OCI) compatible runtimes. CRI-Os purpose is to be the container engine that implements the Kubernetes Container Runtime Interface (CRI) for OpenShift Container Platform and Kubernetes, replacing the Docker service. Source
What are some alternatives?
podman - Podman: A tool for managing OCI containers and pods.
containerd - An open and reliable container runtime
runc - CLI tool for spawning and running containers according to the OCI specification
crun - A fast and lightweight fully featured OCI runtime and C library for running containers
k3s - Lightweight Kubernetes
docker - Docker - the open-source application container engine
minikube - Run Kubernetes locally
distribution-spec - OCI Distribution Specification
cri-dockerd - dockerd as a compliant Container Runtime Interface for Kubernetes
go - The Go programming language
kaniko - Build Container Images In Kubernetes