1 本地k8s运行总结
- 2 运行软件
- 8 各种系统主要图

1 本地k8s运行总结

本机上运行k8s的各种不同软件的对比和结构图

2 运行软件

3 minikube kind k3s

https://www.jambit.com/en/latest-info/toilet-papers/minikube-vs-kind-vs-k3s-which-local-kubernetes-cluster-should-i-use/
本地k8s运行总结 - 图1

4 MicroK8S

https://microk8s.io/compare

	MICROK8S	K3S	MINIKUBE
CNCF certified	Yes	Yes	Yes
Vanilla Kubernetes	Yes	–	Yes
Architecture support	x86, ARM64, s390x	x86, ARM64, ARMhf	x86, ARM64, ARMv7, ppc64, s390x
Enterprise support	Yes	Yes	–
Single-node support	Yes	Yes	Yes
Multi-node cluster support	Yes	Yes	–
Automatic high availability	Yes	–	–
Automatic updates	Yes	–	–
Memory requirements	540 MB	512 MB	2 GB
Add-on functionality	Yes	–	Yes
Container runtime	containerd, kata	CRI-O	Docker, containerd, CRI-O
Networking	Calico, Cilium, CoreDNS, Traefik, NGINX, Ambassador, Multus, MetalLB	Flannel, CoreDNS, Traefik, Canal, Klipper	Calico, Cilium, Flannel, ingress, DNS, Kindnet
Storage	Hostpath storage, OpenEBS, Ceph	Hostpath storage, Longhorn	Hostpath storage
GPU acceleration	Yes	–	Yes

5 K0S

https://computingforgeeks.com/k0s-vs-k3s-vs-microk8s-kubernetes-distributions-comparison/

Feature	k0s	k3s	microk8s
Licensing	Completely Open Source	Completely Open Source	Completely Open Source
Packaging	k0s is distributed as a single binary with minimal host OS dependencies besides the host OS kernel	Packaged as a single binary.	MicroK8s is a Kubernetes cluster delivered as a single snap package.
Kubernetes Versions	v1.20 and v1.21	Latest release updates Kubernetes to v1.22.1	Kubernetes v1.22, v1.21
Container Runtime	ContainerD (default)	ContainerD (default)	ContainerD is the container runtime used by MicroK8s
Supported Host OS	Linux (kernel v3.10 or newer) Windows Server 2019 (experimental)	K3s is expected to work on most modern Linux systems	Windows 10, Linux, macOS
Control Plane Storage Options	In-Cluster Elastic Etcd with TLS (default), In-Cluster SQLite (default for single node), External PostgreSQL, External MySQL	sqlite3 is the default storage mechanism. etcd3, MySQL, Postgres also still available	MicroK8s supports high availability using Dqlite as the datastore for cluster state.
Built-In Security Features	RBAC, Support OpenID Providers, Pod Security Policies, Network Policies, Micro VM Runtimes (coming soon), Control Plane Isolation	Secure by default with reasonable defaults for lightweight environments	Secure by default with reasonable defaults for lightweight environments
Supported CNI Providers	Kube-Router (default), Calico or Custom	K3s will run with flannel by default as the CNI, using VXLAN as the default backend. Custom supported as well	Flanneld runs if ha-cluster is not enabled. If ha-cluster is enabled, calico is run instead.
Supported Machine Architectures	x86-64, ARM64, ARMv7	Latest release supports x86_64, ARMv7, and ARM64	x86_64, ARMv7, and ARM64
Backing Company	Mirantis	Rancher	Canonical
Addons	Minimum Addons	Traefik, Helm,LB	Dashboard, Ingress, DNS, and more

6 Docker Desktop

https://docs.docker.com/desktop/kubernetes/
If you have Docker Desktop, go to preferences, go to the Kubernetes tab, and click Enable Kubernetes.
本地k8s运行总结 - 图2

7 OpenShift

CodeReady Containers (CRC) manages a local OpenShift 4.x cluster optimized for testing and development purposes. https://github.com/code-ready/crc
Minishift helps you run OpenShift 3.x clusters locally by running a single-node OpenShift cluster inside a virtual machine (VM). https://github.com/minishift/minishift

8 各种系统主要图

本地k8s运行总结 - 图3

9 k3s

https://docs.rancher.cn/docs/k3s/architecture/_index
单节点k3s server的架构
本地k8s运行总结 - 图4
K3s高可用架构
一个高可用 K3s 集群由以下几个部分组成：

K3s Server 节点：两个或更多的server节点将为 Kubernetes API 提供服务并运行其他 control-plane 服务
外部数据库：与单节点 k3s 设置中使用的嵌入式 SQLite 数据存储相反，高可用 K3s 需要挂载一个external database外部数据库作为数据存储的媒介。

本地k8s运行总结 - 图5