Kubernetes operator for Sentinel dashboard

Sentinel Dashboard 支持通过 kubernetes CRD 的方式原生部署。

Description

我们希望提交给 kubernetes 一份 Dashboard 资源，kubernetes 帮我们自动生成相应的deployment和service, 生产级场景，可能还要生成ingress，pv，pvc等，而不用再手动去写相应的kubernetes原生多个资源。Dashboard CRD 格式当前设计运行后如下：

apiVersion: sentinel.sentinelguard.io/v1alpha1
kind: Dashboard
metadata:
  annotations:
  creationTimestamp: "2022-11-23T03:56:00Z"
  generation: 6
  name: sentinel-dashboard
  namespace: sentinel-group
  resourceVersion: "148637400"
  uid: ec117635-dbd0-4953-81fe-e95f7a4c93d8
spec:
  env:
  - name: NACOS_ADDRESS
    value: nacos.nacos-group:8848
  image: sentinel-group/sentinel-dashboard:v0.1.0
  ports:
  - port: 8080
    protocol: TCP
  replicas: 1
  resources:
    limits:
      cpu: 1
      memory: 1Gi
    requests:
      cpu: 1
      memory: 2Gi
  type: NodePort
status:
  conditions:
  - lastTransitionTime: "2022-11-23T10:14:06Z"
    message: ""
    observedGeneration: 6
    reason: ""
    status: "True"
    type: Ready
  - lastTransitionTime: "2022-11-24T08:37:32Z"
    message: 'Deployment.apps "sentinel-dashboard" is invalid: spec.template.spec.containers[0].resources.requests:
      Invalid value: "2Gi": must be less than or equal to memory limit'
    observedGeneration: 6
    reason: MutateDeployment
    status: "False"
    type: Applied

How it works

This project aims to follow the Kubernetes Operator pattern.

It uses Controllers which provides a reconcile function responsible for synchronizing resources untile the desired state is reached on the cluster.

Getting Started

You’ll need a Kubernetes cluster to run against. You can use KIND to get a local cluster for testing, or run against a remote cluster. Note: Your controller will automatically use the current context in your kubeconfig file (i.e. whatever cluster kubectl cluster-info shows).

Running on the local

1. Install the CRDs into the cluster:

make install

2. Run your controller (this will run in the foreground, so switch to a new terminal if you want to leave it running):

make run

NOTE: You can also run this in one step by running: make install run

Running on the cluster

1. Install Instances of Custom Resources:

kubectl apply -f config/samples/

2. Build and push your image to the location specified by IMG:

make docker-build docker-push IMG=<some-registry>/sentinel-dashboard-k8s-operator:tag

3. Deploy the controller to the cluster with the image specified by IMG:

make deploy IMG=<some-registry>/sentinel-dashboard-k8s-operator:tag

Modifying the API definitions

If you are editing the API definitions, generate the manifests such as CRs or CRDs using:

make manifests

NOTE: Run make --help for more information on all potential make targets

Uninstall CRDs

To delete the CRDs from the cluster:

make uninstall

Undeploy controller

UnDeploy the controller to the cluster:

make undeploy