Why control plane namespace does not already exist when I am installing linkerd?

I guess uninstalling linkerd is not that simple. I deleted the namespace linkerd and solved the cp namespace does not exist. But all the rest problems are still there.

Hi @chrispokorni, happiness last too short when it's about Kubernetes. I have a problem!
When I try to access linkerd, I get this answer:

I guess the reason is here:

Additionally, seeing the yaml code in magenta, like the picture below, suggests something is wrong with that code.

I tried "-enforced-host=^dashboard.example.com$", but it didn't work.

Hi @chrispokorni,
I removed everything after the equal sign, as the practice says. And this is what I got.

It appears that you are trying to reach this service with a host of '34.79.114.217:31500'.
This does not match /^(localhost|127.0.0.1|web.linkerd-viz.svc.cluster.local|web.linkerd-viz.svc|[::1])(:\d+)?$/ and has been denied for security reasons.

apiVersion: apps/v1
kind: Deployment
metadata:
  annotations:
    config.linkerd.io/proxy-await: enabled
    deployment.kubernetes.io/revision: "1"
    kubectl.kubernetes.io/last-applied-configuration: |
      {"apiVersion":"apps/v1","kind":"Deployment",
      "metadata":{"annotations":{"config.linkerd.io/
      proxy-await":"enabled","linkerd.io/created-by":
      "linkerd/helm stable-2.13.2","linkerd.io/inject":
      "enabled"},"labels":{"app.kubernetes.io/name":
      "web","app.kubernetes.io/part-of":"Linkerd",
      "app.kubernetes.io/version":"stable-2.13.2",
      "component":"web","linkerd.io/extension":"viz",
      "namespace":"linkerd-viz"},"name":"web","namespace":
      "linkerd-viz"},"spec":{"replicas":1,"selector"
      :{"matchLabels":{"component":"web",
      "linkerd.io/extension":"viz","namespace":
      "linkerd-viz"}},"template":{"metadata":{"annotations":
      {"cluster-autoscaler.kubernetes.io/safe-to-evict":
      "true","config.alpha.linkerd.io/
      proxy-wait-before-exit-seconds":"0","linkerd.io
      /created-by":"linkerd/helm stable-2.13.2",
      "linkerd.io/inject":"enabled"},"labels":
      {"component":"web","linkerd.io/extension":
      "viz","namespace":"linkerd-viz"}},"spec":
      {"containers":[{"args":["-linkerd-metrics-api-addr=
      metrics-api.linkerd-viz.svc.cluster.local:8085",
      "-cluster-domain=cluster.local","
      -controller-namespace=linkerd","-log-level=info",
      "-log-format=plain","-enforced-host=
      ^(localhost|127\\.0\\.0\\.1|web\\.linkerd-viz\\.svc\\.
      cluster\\.local|web\\.linkerd-viz\\.svc|\\[::1\\])
      (:\\d+)?$","-enable-pprof=false"],"image":
      "cr.l5d.io/linkerd/web:stable-2.13.2",
      "imagePullPolicy":"IfNotPresent","livenessProbe"
      :{"httpGet":{"path":"/ping","port":9994},
      "initialDelaySeconds":10},"name":"web",
      "ports":[{"containerPort":8084,"name":"http"},
      {"containerPort":9994,"name":"admin-http"}],
      "readinessProbe":{"failureThreshold":7,"httpGet"
      :{"path":"/ready","port":9994}},"resources":null,
      "securityContext":{"allowPrivilegeEscalation":
      false,"capabilities":{"drop":["ALL"]},
      "readOnlyRootFilesystem":true,"runAsNonRoot":true,
      "runAsUser":2103,"seccompProfile":{"type":
      "RuntimeDefault"}}}],"nodeSelector":{
      "kubernetes.io/os":"linux"},"securityContext":{
      "seccompProfile":{"type":"RuntimeDefault"}},
      "serviceAccountName":"web"}}}}
          linkerd.io/created-by: linkerd/helm stable-2.13.2
    linkerd.io/inject: enabled
  creationTimestamp: "2023-04-27T13:24:28Z"
  generation: 1
  labels:
    app.kubernetes.io/name: web
    app.kubernetes.io/part-of: Linkerd
    app.kubernetes.io/version: stable-2.13.2
     component: web
    linkerd.io/extension: viz
    namespace: linkerd-viz
  name: web
  namespace: linkerd-viz
  resourceVersion: "474056"
  uid: d88f4688-2d9d-43ff-a7ea-1d4a3065b44b
spec:
  progressDeadlineSeconds: 600
  replicas: 1
  revisionHistoryLimit: 10
  selector:
    matchLabels:
      component: web
      linkerd.io/extension: viz
      namespace: linkerd-viz
  strategy:
    rollingUpdate:
      maxSurge: 25%
      maxUnavailable: 25%
    type: RollingUpdate
  template:
    metadata:
      annotations:
        cluster-autoscaler.kubernetes.io/safe-to-evict: "true"
        config.alpha.linkerd.io/proxy-wait-before-exit-seconds: "0"
        linkerd.io/created-by: linkerd/helm stable-2.13.2
        linkerd.io/inject: enabled
      creationTimestamp: null
      labels:
        component: web
        linkerd.io/extension: viz
        namespace: linkerd-viz
    spec:
      containers:
      - args:
        - -linkerd-metrics-api-addr=metrics-api.linkerd-viz.svc.cluster.local:8085
        - -cluster-domain=cluster.local
        - -controller-namespace=linkerd
        - -log-level=info
        - -log-format=plain
        - -enforced-host=^(localhost|127\.0\.0\.1|web\.linkerd-viz\.svc\.cluster\.local|web\.linkerd-viz\.svc|\[::1\])(:\d+)?$
        - -enable-pprof=false
        image: cr.l5d.io/linkerd/web:stable-2.13.2
        imagePullPolicy: IfNotPresent
        livenessProbe:
          failureThreshold: 3
          httpGet:
            path: /ping
            port: 9994
            scheme: HTTP
          initialDelaySeconds: 10
          periodSeconds: 10
          successThreshold: 1
          timeoutSeconds: 1
        name: web
        ports:
        - containerPort: 8084
          name: http
          protocol: TCP
        - containerPort: 9994
          name: admin-http
          protocol: TCP
        readinessProbe:
          failureThreshold: 7
          httpGet:
            path: /ready
            port: 9994
            scheme: HTTP
          periodSeconds: 10
          successThreshold: 1
          timeoutSeconds: 1
        resources: {}
        securityContext:
          allowPrivilegeEscalation: false
          capabilities:
            drop:
            - ALL
          readOnlyRootFilesystem: true
          runAsNonRoot: true
          runAsUser: 2103
          seccompProfile:
            type: RuntimeDefault
        terminationMessagePath: /dev/termination-log
        terminationMessagePolicy: File
      dnsPolicy: ClusterFirst
      nodeSelector:
        kubernetes.io/os: linux
      restartPolicy: Always
      schedulerName: default-scheduler
      securityContext:
        seccompProfile:
          type: RuntimeDefault
      serviceAccount: web
      serviceAccountName: web
      terminationGracePeriodSeconds: 30
status:
  availableReplicas: 1
  conditions:
  - lastTransitionTime: "2023-04-27T13:24:28Z"
    lastUpdateTime: "2023-04-27T13:24:49Z"
    message: ReplicaSet "web-864897b5c5" has successfully progressed.
    reason: NewReplicaSetAvailable
    status: "True"
    type: Progressing
  - lastTransitionTime: "2023-05-04T22:25:49Z"
    lastUpdateTime: "2023-05-04T22:25:49Z"
    message: Deployment has minimum availability.
    reason: MinimumReplicasAvailable
    status: "True"
    type: Available
  observedGeneration: 1
  readyReplicas: 1
  replicas: 1
  updatedReplicas: 1
 

@chrispokorni, I found my mistake!! I was taken away more than the practice says, but talking to you is helpful. I mean, visualising the code correctly changes many things. Thank you!!