cri-dockerd
community
cri-dockerd | community | |
---|---|---|
11 | 44 | |
956 | 11,714 | |
2.5% | 0.4% | |
8.4 | 9.7 | |
5 days ago | about 23 hours ago | |
Go | Jupyter Notebook | |
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.
cri-dockerd
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How to create a 3-node kubernetes cluster and deploy an application on my ubuntu 22.04 minibox
$ wget https://github.com/Mirantis/cri-dockerd/releases/download/v0.3.9/cri-dockerd-0.3.9.amd64.tgz $ tar zxvf cri-dockerd-0.3.9.amd64.tgz $ cd cri-dockerd $ sudo mkdir -p /usr/local/bin $ sudo install -o root -g root -m 0755 cri-dockerd/usr/local/bin/cri-dockerd $ mkdir foo; cd foo $ git clone [email protected]:Mirantis/cri-dockerd.git $ cd cri-dockerd $ sudo install packaging/systemd/* /etc/systemd/system $ sudo sed -i -e 's,/usr/bin/cri-dockerd,/usr/local/bin/cri-dockerd,' /etc/systemd/system/cri-docker.service $ sudo systemctl daemon-reload $ sudo systemctl enable --now cri-docker.socket
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expected a 32 byte SHA-256 hash, found 24 bytes
I installed cri-dockerd using this documentation https://github.com/Mirantis/cri-dockerd
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Is docker "a thing" at companies that use Kubernetes?
99% of what you just said is completely incorrect. containerd is not a facade for Docker, in fact the Docker engine is a facade for containerd. The OCI spec is also not a facade for Docker, Docker is simply one application which can create OCI compliant images which can be executed by runtimes like runc. Kubernetes has zero facades for Docker, unless you count the optional open-source cri-dockerd.
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Kubeadm cluster - no connections to services
https://kubernetes.io/docs/setup/production-environment/tools/kubeadm/create-cluster-kubeadm/ Adjust netplan for static IP Adding br_netfilter and overlay to kernel Creating /etc/modules-load.d/k8s.conf with bridging and forwarding https://kubernetes.io/docs/setup/production-environment/container-runtimes/#forwarding-ipv4-and-letting-iptables-see-bridged-traffic Installing docker components https://kubernetes.io/docs/setup/production-environment/container-runtimes/#docker Installing cri-dockerd https://github.com/Mirantis/cri-dockerd Disabling swap https://graspingtech.com/disable-swap-ubuntu/ install kubeadm kubectl kubelet https://kubernetes.io/docs/setup/production-environment/tools/kubeadm/install-kubeadm/
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Problems with setting up the cluster with kubeadm
Im trying to learn how to set up kubernetes cluster with kubeadm. Im using official kubernetes documentation ( maybe there is a better source?). My goal is to set it up with cri-dockerd and systemd. And to be honest its quite hard task to do it. Informations are scattered arround with links and sometimes its hard to know the order which steps should be executed. I have 2 Virtualbox machines, connected together with NAT network. A master and worker node. I performed these steps on both of them: https://kubernetes.io/docs/setup/production-environment/tools/kubeadm/create-cluster-kubeadm/ Adjust netplan for static IP Adding br_netfilter and overlay to kernel Creating /etc/modules-load.d/k8s.conf with bridging and forwarding https://kubernetes.io/docs/setup/production-environment/container-runtimes/#forwarding-ipv4-and-letting-iptables-see-bridged-traffic Installing docker components https://kubernetes.io/docs/setup/production-environment/container-runtimes/#docker Installing cri-dockerd https://github.com/Mirantis/cri-dockerd Disabling swap install kubeadm kubectl kubelet https://kubernetes.io/docs/setup/production-environment/tools/kubeadm/install-kubeadm/ configure kubelet cgroup driver https://kubernetes.io/docs/tasks/administer-cluster/kubeadm/configure-cgroup-driver/ So currently im at the configuring cgroup driver. I tried to execute kubeadm init kubeadm-config.yaml but kubeadm found 2 CRI endpoints. So i tried to point the correct one with this command kubeadm join --cri-socket /var/run/cri-dockerd.sock but i got discover:Invalid value: ::: bootstrapToken or file must be set And now im completely lost. And also im confused is this a moment for installing CNI (probably i will try with Calico) for pod communication or should i start the cluster first?
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Kubernetes Architecture Explained: Worker Nodes in a Cluster
But not to worry, you can still use Docker as a container runtime in Kubernetes using the cri-dockerd adapter. cri-dockerd provides a shim for Docker Engine that lets you control Docker via the Kubernetes CRI. ****
- CRI-dockerd is an adapter that provides a shim for Docker Engine that lets you control Docker via the Kubernetes Container Runtime Interface
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Kubernetes 1.24 Released: Whatβs New?
As of version 1.24, either one of the other supported runtimes (e.g. containerd or CRI-O) or, in case you still want to rely on Docker Engine, cri-dockerd must be used. Further information on precautions that may be necessary due to the removal of Dockershim is provided by Kubernetes in a guide.
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Podman 4.0.0
Kubernetes requires a tool which implements the Container Runtime Interface, a standardized API for starting & managing containers. This is from 2015-2016[1].
For a while Kubernetes has included something called the "dockershim", it's own implementation of a CRI interface that, under the hood, calls Docker or Podman. There's also tools like kind[2] ("kubernetes in docker") that go further- not just hosting Kubernetes worker containers in Docker, but hosting the main kubernetes daemons also in Docker.
Kubernetes deprecated Dockershim, formally in December 2020, but is just throwing the switch now in the upcoming 1.24, expected mid-April[3]. A company Mirantis has pledged to take over support of Dockershim[4], and is calling the new effort "cri-dockerd"[5]. This should allow Kubernetes workers to continue to run via Docker or Podman.
Kind is unaffected, since it runs the main Kubernetes controllers in Docker, which then launch their own opencontainerd (one off the main CRI implementations) inside that Docker container, nested like, so no dockership/cri-dockerd is needed).
[1] https://kubernetes.io/blog/2016/12/container-runtime-interfa...
[2] https://kind.sigs.k8s.io/
[3] https://kubernetes.io/blog/2022/01/07/kubernetes-is-moving-o...
[4] https://www.mirantis.com/blog/mirantis-to-take-over-support-...
[5] https://github.com/Mirantis/cri-dockerd
community
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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.
- Development in horizontal pod autoscaler
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A Comprehensive Guide to API Gateways, Kubernetes Gateways, and Service Meshes
More recently, the Kubernetes SIG Network has been evolving the Gateway API to support service meshes.
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What Rust can learn from Kubernetes governance?
https://github.com/kubernetes/kubernetes https://www.kubernetes.dev/resources/calendar/ https://github.com/kubernetes/community/blob/master/governance.md https://github.com/kubernetes/steering https://github.com/kubernetes/community/blob/master/sig-list.md
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How Kubernetes computes CPU utilization for HPA?
According to this doc it takes the average of CPU utilization of a pod (average across the last 1 minute) divided by the CPU requested by the pod. Then it computes the arithmetic mean of all the pods' CPU.
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How to get the resource usage of a pod in Kubernetes?
metrics-server has not supported kubectl top Resource Metrics API
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Comparing Kubernetes Gateway and Ingress APIs
With the Gateway API being a superset of the Ingress API, it might make sense to consolidate both. Thanks to the SIG Network community, Gateway API is still growing and will soon be production ready.
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How to get a head start into contributing to open source projects
Projects in/around Kubernetes and the CNCF are generally where I spend what little time I can these days. Most communities are incredibly welcoming and provide timely feedback. But the problem space of "managing a cloud platform" can take several years to really wrap ones head around, setting aside focused topics via SIGs like networking, storage, observability, API design, etc.
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Getting started with kubectl plugins
Krew is a plugin manager maintained by the Kubernetes Special Interest Group (SIG) CLI community. Krew makes it easy to use kubectl plugins and helps you discover, install, and manage them on your machine. It is similar to tools like apt, dnf, or brew. Today, over 200 kubectl plugins are available on Krew - and that number is only increasing. Some projects are actively used and some get deprecated over time, but are still accessible via Krew.
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Daily General Discussion - December 2, 2022
[1] https://k8s.devstats.cncf.io/d/9/companies-table?orgId=1&var-period_name=Last%20decade&var-metric=contributions [2] https://kubernetes.io/releases/release/ [3] https://github.com/kubernetes/community/blob/master/governance.md [4] https://github.com/kubernetes/community/blob/master/sig-list.md
What are some alternatives?
containerd - An open and reliable container runtime
textbook-curriculum - Ada Developers Academy Online Curriculum
cri-o - Open Container Initiative-based implementation of Kubernetes Container Runtime Interface
mentoring - π©πΏβππ¨π½βππ©π»βπCNCF Mentoring: LFX Mentorship + Summer of Code
compose-cli - Easily run your Compose application to the cloud with compose-cli
website - Kubernetes website and documentation repo:
nerdctl - contaiNERD CTL - Docker-compatible CLI for containerd, with support for Compose, Rootless, eStargz, OCIcrypt, IPFS, ...
cni - Container Network Interface - networking for Linux containers
mariadb-podman-socket-activation - Demo of a templated systemd user service that runs rootless Podman and starts MariaDB with socket activation
spec - Container Storage Interface (CSI) Specification.
enhancements - Enhancements tracking repo for Kubernetes
cri-api - Container Runtime Interface (CRI) β a plugin interface which enables kubelet to use a wide variety of container runtimes.