List deployments in all namespaces

deploy.yaml

---
apiVersion: v1
kind: ServiceAccount
metadata:
  creationTimestamp: null
  name: lister
---
apiVersion: rbac.authorization.k8s.io/v1
kind: Role
metadata:
  creationTimestamp: null
  name: lister-role
rules:
  - apiGroups:
      - apps
    resources:
      - deployments
    verbs:
      - list
---
apiVersion: rbac.authorization.k8s.io/v1
kind: RoleBinding
metadata:
  name: lister-rolebinding
roleRef:
  apiGroup: rbac.authorization.k8s.io
  kind: Role
  name: lister-role
subjects:
  - kind: ServiceAccount
    name: lister
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRole
metadata:
  creationTimestamp: null
  name: cluster-lister-role
rules:
  - apiGroups:
      - apps
    resources:
      - deployments
    verbs:
      - list
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
  name: cluster-lister-rolebinding
roleRef:
  apiGroup: rbac.authorization.k8s.io
  kind: ClusterRole
  name: cluster-lister-role
subjects:
  - kind: ServiceAccount
    name: lister
    namespace: default
---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: &name kubectl
  labels:
    app: *name
spec:
  replicas: 1
  selector:
    matchLabels:
      app: *name
  template:
    metadata:
      labels:
        app: *name
    spec:
      serviceAccountName: lister
      containers:
        - image: bitnami/kubectl:latest
          name: kubectl
          command: ["sleep", "infinity"]
          resources:
            requests:
              cpu: 100m
              memory: 100Mi
            limits:
              cpu: 50m
              memory: 50Mi

kubectl get pod -l app=kubectl
kubectl exec -it $(kubectl get pod -l app=kubectl -o jsonpath="{.items[0].metadata.name}") -- bash
$ kubectl get deploy --all-namespaces --v=6 # v=6 to see the url, inside the pod will produce lots of failed requests