- name: Setting node_nums variable
  set_fact: node_nums="{{groups.yarn|length}}"

- name: Waiting for the Yarn start,sleep 30s
  shell: sleep 30  
  
- block:        
    - name: checking ResourceManager status
      shell: source /etc/profile && jps -l | grep "org.apache.hadoop.yarn.server.resourcemanager.ResourceManager" | grep -v grep | wc -l
      register: resourcemanager_check

    - name: checking ResourceManager
      fail:
        msg: "ResourceManager节点启动异常，请登陆{{ inventory_hostname }},保留日志反馈，路径:{{ deploy_dir }}/{{ hadoop_version }}/logs/"
      when: resourcemanager_check.stdout != '1'
      run_once: true
      delegate_to: 127.0.0.1
      
    - name: checking JobHistoryServer status
      shell: source /etc/profile && jps -l | grep "org.apache.hadoop.mapreduce.v2.hs.JobHistoryServer" | grep -v grep | wc -l
      register: history_check

    - name: checking JobHistoryServer
      fail:
        msg: "JobHistoryServer节点启动异常，请登陆{{ inventory_hostname }},保留日志反馈，路径:{{ deploy_dir }}/{{ hadoop_version }}/logs/"
      when: history_check.stdout != '1'
      run_once: true
      delegate_to: 127.0.0.1      
  when: inventory_hostname in groups['yarn'][0:2]
      
- block: 
    - name: checking NodeManager status
      shell: source /etc/profile && jps -l | grep "org.apache.hadoop.yarn.server.nodemanager.NodeManager" | grep -v grep | wc -l
      register: datanode_status
    
    - name: checking NodeManager
      fail:
        msg: "NodeManager未启动,请登陆[{{ inventory_hostname }}],保留日志反馈，路径:{{ deploy_dir }}/{{ hadoop_version }}/logs/"
      when: datanode_status.stdout != '1'
      run_once: true
      delegate_to: 127.0.0.1
  when: node_nums >= cluster_limit and inventory_hostname not in groups['yarn'][0:2]

- block: 
    - name: checking NodeManager status
      shell: source /etc/profile && jps -l | grep "org.apache.hadoop.yarn.server.nodemanager.NodeManager" | grep -v grep | wc -l
      register: datanode_status
    
    - name: checking NodeManager
      fail:
        msg: "NodeManager未启动,请登陆[{{ inventory_hostname }}],保留日志反馈，路径:{{ deploy_dir }}/{{ hadoop_version }}/logs/"
      when: datanode_status.stdout != '1'
      run_once: true
      delegate_to: 127.0.0.1
  when: node_nums < cluster_limit