<p>I need some assistance to know what I'm missing here.. 
I'm trying to deploy streamsets application from customized values.yml file for my Lab (localhost-master).I'm trying to deploy the pod on <strong>"streamset-ns"</strong> namespace. I'm facing the below error.
<strong>stderr: No resources found in streamset-ns namespace.</strong></p>

<p><strong>Main Script under Task</strong></p>

<pre><code>- name: Listing all Namespaces
  command: "kubectl get namespaces"
  register: namespace_list

- name: Checking if streamsets is installed in  "{{streamsets_namespace}}"
  command: "kubectl get pods -n {{streamsets_namespace}}"
  register: if_streamsets

- set_fact:
    message: "{{ ((task_type == 'install') and ('deployed' in if_streamsets.stdout)) or ((task_type == 'uninstall') and ('deployed' in if_streamsets.stdout)) | ternary('streamsets is installed', 'streamsets is not installed') }}"

- debug:
    msg: "{{message}}"

- name: Checking streamsets running status
  block:
    - debug:
        msg: "streamsets is already deployed in {{streamsets_namespace}}"

    - name: Getting deployed pod status
      command: "kubectl get pods -n {{streamsets_namespace}}"
      register: streamsets_pod_status

    - debug:
        var: streamsets_pod_status.stdout_lines
  when: "'streamsets' in if_streamsets.stdout and 'deployed' in if_streamsets.stdout"


- name: Installing streamsets
  block:
    - name: Create a Kubernetes namespace for streamsets
      k8s:
        name: "{{streamsets_namespace}}"
        api_version: v1
        kind: Namespace
        state: present
      when: "streamsets_namespace not in namespace_list.stdout_lines"

#    - name: Adding Helm Repository for Streamsets
#      command: "{{helm_location}}/helm repo add streamsets {{streamsets_helm_charts}}"
#      register: helm_repo_results
#      changed_when: False
#      failed_when: "'Error' in helm_repo_results.stderr"
#
    - name: Applying Template Module
      template:
        src: "roles/streamsets/templates/values.yml.j2"
        dest: "/home/{{ansible_user}}/values.yml"
        mode: '0644'

    - name: Install streamsets using Command Module
      command: "kubectl create -f /home/{{ansible_user}}/values.yml -n {{streamsets_namespace}}"
      register: streamsets_result
      failed_when: "'Error' in streamsets_result.stderr"

    - debug:
        var: streamsets_result.stdout_lines

#    - name: Checking Streamsets Deployment Status
#      action:
#        shell kubectl get pods -n "{{streamsets_namespace}}"| grep "{{streamsets_release_name}}" | grep '1/1' |wc -l
#      register: streamsets_deployment_status
#      until: streamsets_deployment_status.stdout|int == streamsets_replicas | int
#      retries: 5
#      delay: 60
#      
#    - debug:
#        var: streamsets_deployment_status.stdout_lines


    - name: Checking Streamsets Deployment Status
      command: kubectl -n "{{streamsets_namespace}}" wait --for=condition=Ready pods --all --timeout=180s
      register: Streamsets_pod_status
      failed_when: "'Error' in Streamsets_pod_status.stderr"


    - name: Removing deployed configuration files for Streamsets
      file:
       path: "/home/{{ansible_user}}/values.yml"
       state: absent
  when: "'install' == task_type and 'streamsets' not in if_streamsets.stdout and 'deployed' not in if_streamsets.stdout"


- name: Unistalling streamsets from K8s
  block:
    - name: Removing Statefulsets &amp; Service from  "{{streamsets_namespace}}"
      action:
        shell kubectl -n "{{streamsets_namespace}}" delete statefulsets "{{streamsets_release_name}}" &amp;&amp; kubectl -n "{{streamsets_namespace}}" delete service "{{streamsets_release_name}}"-service
      register: streamsets_removal_status
    - debug:
        var: streamsets_removal_status.stdout_lines

#    - name: Checking PVC status in "{{streamsets_namespace}}"
#      shell: kubectl get pvc -n "{{streamsets_namespace}}" | grep -v NAME | cut -d ' ' -f1
#      register: streamsets_pvc_status
#    - debug:
#        var: streamsets_pvc_status.stdout_lines

#    - name: Delete occupied pvc for streamsets
#      command: "kubectl delete pvc -n {{streamsets_namespace}} {{streamsets_pvc_status.stdout}}"
#      register: pvc_delete_status
#      when: streamsets_pvc_status.stdout_lines != ''
#    - debug:
#        var: pvc_delete_status.stdout_lines

  when: "'uninstall' == task_type and 'streamsets' in if_streamsets.stdout and 'deployed' in if_streamsets.stdout"


- name: Playbook Signature
  block:
    - debug:
        msg: "No 'task_type' supplied. Playbook signature: ansible-playbook -i &lt;hosts file&gt; &lt;playbook&gt; --extra-vars 'task_type=&lt;install/uninstall&gt;'"
  when: "task_type == '' or ('install' or 'uninstall') not in task_type"

</code></pre>

<p><strong>yml created under templates</strong></p>

<pre><code>---
apiVersion: v1
kind: Service
metadata:
  name: streamsets-service
  labels:
    name: streamsets
spec:
  type: NodePort
  ports:
  - port: {{streamsets_port}}
    targetPort: 18630
    nodePort: {{streamsets_nodePort}}
  selector:
    role: streamsets
---
apiVersion: apps/v1
kind: StatefulSet
metadata:
  name: streamsets
spec:
  serviceName: streamsets-service
  replicas: {{streamsets_replicas}}
  selector: 
    matchLabels:
      name: streamsets
  template:
    metadata:
      labels:
        role: streamsets
        environment: test
        replicaset: streamsetsRepSet
    spec:
      terminationGracePeriodSeconds: 10
      containers:
        - name: {{streamsets_image_container}}
          image: {{streamsets_image_name}}:{{streamsets_image_version}}
          imagePullPolicy: Always
          ports:
            - containerPort: 18630
          volumeMounts:
          - name: data
            mountPath: /data
  volumeClaimTemplates:
  - metadata:
      name: data
    spec:
      accessModes: [ "ReadWriteOnce" ]
      storageClassName: {{streamsets_storageClass}}
      resources:
        requests:
          storage: {{streamsets_storage_volume}}
</code></pre>

<p><em>Can you please help me?</em></p>

<p>When i have a look at your error which you have posted as comment, it looks like you have a mismatch in the <code>selector</code>.</p>

<pre><code>selector: 
  matchLabels:
    name: streamsets
template:
  metadata:
    labels:
      role: streamsets
      environment: test
      replicaset: streamsetsRepSet
</code></pre>

<p>"...You must set the .spec.selector field of a StatefulSet to match the labels of its .spec.template.metadata.labels..."[1]</p>

<p>Can you adjust your labels and that the selector can also match a template label and try it again?</p>

<p>Example:</p>

<pre><code>selector: 
  matchLabels:
    name: streamsets
template:
  metadata:
    labels:
      name: streamsets
</code></pre>

<p>[1]<a href="https://kubernetes.io/docs/concepts/workloads/controllers/statefulset/#pod-selector" rel="nofollow noreferrer">https://kubernetes.io/docs/concepts/workloads/controllers/statefulset/#pod-selector</a></p>
