cri-tools
CLI and validation tools for Kubelet Container Runtime Interface (CRI) . (by kubernetes-sigs)
CoreDNS
CoreDNS is a DNS server that chains plugins (by coredns)
| cri-tools | CoreDNS | |
|---|---|---|
| 7 | 41 | |
| 1,557 | 11,811 | |
| 1.0% | 0.8% | |
| 9.2 | 9.3 | |
| 2 days ago | 2 days ago | |
| Go | Go | |
| Apache License 2.0 | Apache License 2.0 |
The number of mentions indicates the total number of mentions that we've tracked plus the number of user suggested alternatives.
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.
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-tools
Posts with mentions or reviews of cri-tools.
We have used some of these posts to build our list of alternatives
and similar projects. The last one was on 2022-09-04.
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Migrating from dockershim to containerd
Installing crictl (https://github.com/kubernetes-sigs/cri-tools/blob/master/docs/crictl.md) was helpful, as well as journalctl -u containerd.
- kubectl get nodes -o wide shows containerd runtime, but sudo ctr containers list doesn't return any containers on host
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Debugging containerd, A "new" container runtime means new debugging techniques are required
crictl: Uses the CRI interface to fetch data about containers, agnostic of CRIs. Maintained by Kubernetes at https://github.com/kubernetes-sigs/cri-tools
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Quick question: Can you run crictl commands from within a running container?
FROM alpine:latest RUN wget -O - https://github.com/kubernetes-sigs/cri-tools/releases/download/v1.23.0/crictl-v1.23.0-linux-amd64.tar.gz | gunzip | tar xvf - && mv crictl /usr/bin
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k8s-the-hard-way
# wget https://github.com/kubernetes-sigs/cri-tools/releases/download/v1.21.0/crictl-v1.21.0-linux-amd64.tar.gz \ https://github.com/opencontainers/runc/releases/download/v1.0.0-rc93/runc.amd64 \ https://github.com/containernetworking/plugins/releases/download/v0.9.1/cni-plugins-linux-amd64-v0.9.1.tgz \ https://github.com/containerd/containerd/releases/download/v1.4.4/containerd-1.4.4-linux-amd64.tar.gz \ https://storage.googleapis.com/kubernetes-release/release/v1.21.0/bin/linux/amd64/kubectl \ https://storage.googleapis.com/kubernetes-release/release/v1.21.0/bin/linux/amd64/kube-proxy \ https://storage.googleapis.com/kubernetes-release/release/v1.21.0/bin/linux/amd64/kubelet
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A Window into Docker, minikube, and containerd
We are in the endgame now. I promise. From the README, crictl provides a CLI for CRI-compatible container runtimes. The following snippet performs the following:
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😎 Manage WebAssembly Apps in WasmEdge Using Docker Tools
Also make sure that you have cri-o, crictl, containernetworking-plugins, and buildah or docker installed.
CoreDNS
Posts with mentions or reviews of CoreDNS.
We have used some of these posts to build our list of alternatives
and similar projects. The last one was on 2023-10-08.
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Small DNS Server That Support Outgoing Address Binding?
CoreDNS supports this via the bind plugin.
- The Tailscale Universal Docker Mod
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How to use Cloudflare 1.1.1.1 with Kubernetes DNS
I'd like to use Cloudflare's 1.1.1.1 and 1.0.0.1 nameservers in Kubernetes, alongside DNS over TLS. It looks like I can do it using core-dns. I need to setup the following somehow:
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Dockerize Bind9 DNS with custom image
Shamless plug for CoreDNS. Much better DNS server than classic bind9. And of course there's already a nice container image for it.
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Kubernetes traffic discovery
But another approach that could work in Kubernetes, because the DNS servers are within the cluster itself, would be to work directly with the DNS server pods. In most Kubernetes clusters, whether standalone or managed (GKE, AKS, EKS), the cluster DNS is either coredns or kube-dns. That was great to minimize how much configuration options we’d need to support. We realized we could edit the coredns or kube-dns configmap resources to enable their log option, which would make them log all the queries they handle. We’ll cover exactly how it’s done in more detail below.
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Self hosted DNS server that responds to queries with data from web API?
CoreDNS has an ectd plugin, so your service could add entries to a database, which is used as record source. Not the same mechanism as you have described, but it will get the job done. Also this is what Kubetnetes does for incluster dns records.
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Upgrade CoreDNS without downtime and without kubernetes
nevermind there's caddy builtin upgrade method https://github.com/coredns/coredns/issues/6034
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Guide for using DNS with home lab servers?
Coredns can be spun up in a docker container, just starting to get into it myself
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What would you rewrite in Golang?
CoreDNS is a pretty good DNS server.
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Cool networking projects in golang
Core DNS (https://coredns.io).
What are some alternatives?
When comparing cri-tools and CoreDNS you can also consider the following projects:
node-feature-discovery - Node feature discovery for Kubernetes
PowerDNS - PowerDNS Authoritative, PowerDNS Recursor, dnsdist
cni - Container Network Interface - networking for Linux containers
blocky - Fast and lightweight DNS proxy as ad-blocker for local network with many features
SSVM - WasmEdge is a lightweight, high-performance, and extensible WebAssembly runtime for cloud native, edge, and decentralized applications. It powers serverless apps, embedded functions, microservices, smart contracts, and IoT devices.
Pi-hole - A black hole for Internet advertisements
cfssl - CFSSL: Cloudflare's PKI and TLS toolkit
nsupdate.info - Dynamic DNS service
runc - CLI tool for spawning and running containers according to the OCI specification
etcd - Distributed reliable key-value store for the most critical data of a distributed system
rustwasmc - Tool for building Rust functions for Node.js. Combine the performance of Rust, safety and portability of WebAssembly, and ease of use of JavaScript.