- block:
    - name: Stopping and removing exporter container
      docker_container:
        name: 'clickhouse_exporter'
        state: absent

    - name: Removing old exporter image
      docker_image:
        name: 'clickhouse_exporter'
        tag: 'v2.0'
        state: absent
    
    - name: Copying unload_ck.sh to {{ deploy_dir }}/
      template: 
        src: 'unload_ck.sh.j2'
        dest: '{{ deploy_dir }}/unload_ck.sh'
        force: true
        mode: 0755
        
    - name: Uninstalling ClickHouse
      shell: cd {{ deploy_dir }} && sh unload_ck.sh
      
    - name: Ansible delete {{ deploy_dir }}/unload_ck.sh
      file:
        path: "{{ deploy_dir }}/unload_ck.sh"
        state: absent
        
    - name: Checking ZooKeeper has Clickhouse nodes
      shell: "docker exec zookeeper zkCli.sh ls / | grep clickhouse | wc -l"
      run_once: true
      delegate_to: "{{ groups.zookeeper[0] }}"
      register: has_zknode
      
    - name: Delete Clickhouse nodes in ZooKeeper
      shell: "docker exec zookeeper zkCli.sh rmr /clickhouse"
      run_once: true
      delegate_to: "{{ groups.zookeeper[0] }}"
      when: has_zknode.stdout >= '1'
      
    - name: Checking if the Clickhouse service already exists
      shell: rpm -qa | grep clickhouse | wc -l
      register: check_out
      
    - name: To terminate execution
      fail:
       msg: "Uninstalling ClickHouse fails.Please uninstall manually with yum remove"
      run_once: true
      delegate_to: 127.0.0.1 
      when: check_out.stdout >= '1'