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
4 MicroK8S
|
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.
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
9 k3s
https://docs.rancher.cn/docs/k3s/architecture/_index
单节点k3s server的架构
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。
10 k0s
https://docs.k0sproject.io/v1.23.5+k0s.0/architecture/
11 MiniKube
12 Kind
13 K8s
14 Docker Desktop k8s
15 OpenShit CRC
