init sentinel dashboard operator

[garroshh]

需求分析

sentinel dashboard 支持 kubernetes 原生部署

场景分析

我们希望提交给kubernetes一份sentinel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。

apiVersion: sentinelguard.io/v1alpha1
kind: Sentinel
metadata:
  name: sentinel-dashboard
  namespace: sentinel-group
spec:
  replicas: 1
  image: "sentinel-group/sentinel-dashboard:v0.1.0"
  type: "NodePort"
  ports:
  - port: 8080
    nodePort: 30000
  env:
  - name: "NACOS_ADDRESS"
    value: "nacos.nacos-group:8848"
  resources:
    limits:
      cpu: 1
      memory: 1Gi
    requests:
      cpu: 1
      memory: 1Gi
status:
  phase: "running"

功能需求（todo）

1. status 字段

   如 运行节点ip，运行正常状态等

2. 日志部分PV，PVC local strorage Spec 部分

   如 dashboard 业务日志及metrics日志存储等

3. helm charts 部署

4. k8事件记录

5. operator 高可用配置

6. 集群流控

7. 是否启用ingress对外暴露

非功能需求

暂无

[wilsonwu]

@sczyh30 please help to review

[wilsonwu]

@garroshh please change all daocloud.io to sentinelguard.io

[wilsonwu]

/lgtm
@sczyh30 ptal

[sczyh30]

cc @sentinel-group/sentinel-committers for review

[sczyh30]

Could you please add some description of your design and implementation in the PR description?

[sczyh30]

For reviewers: original issue: alibaba/Sentinel#2952

[wilsonwu]

/lgtm again.

[wilsonwu]

Is there any progress we can follow and speed up the PR process?
@sczyh30 @sentinel-group/sentinel-committers

[samzong]

+1 look good.

[wilsonwu]

Any improvement we need to do? @sczyh30

[sczyh30]

LGTM

[sczyh30]

Nice work. Thanks for contributing and look forward to more! 👍