title: tidb-ansible error in ansible-playbook bootstrap.yml command
body: <p>I am trying to install TiDB through TiDB ansible. I am referring to documentation in <a href="https://pingcap.com/docs/v1.0/op-guide/ansible-deployment/" rel="nofollow noreferrer">https://pingcap.com/docs/v1.0/op-guide/ansible-deployment/</a> and in the process I am facing the following error for command ansible-playbook bootstrap.yml . Though the disk is not full I am getting the disk full error. Please do let me know the steps to fix the error. Thank you!</p>
  
  <pre><code>    [root@fm42cephnode005 tidb-ansible-master]# df -h
      Filesystem      Size  Used Avail Use% Mounted on
      devtmpfs         94G     0   94G   0% /dev
      tmpfs            94G     0   94G   0% /dev/shm
      tmpfs            94G   12M   94G   1% /run
      tmpfs            94G     0   94G   0% /sys/fs/cgroup
      /dev/sdg5       239G  5.2G  222G   3% /
      /dev/sdg3       123G  1.8G  115G   2% /home
      /dev/sdg2      1014M  257M  758M  26% /boot
      /dev/sdg1       200M   12M  189M   6% /boot/efi
      tmpfs            19G   20K   19G   1% /run/user/42
      tmpfs            19G     0   19G   0% /run/user/0
      /dev/nvme3n1    1.5T   77M  1.4T   1% /home/tidbdeployment
  
  [root@fm42cephnode005 tidb-ansible-master]# ansible-playbook bootstrap.yml
  
  PLAY [initializing deployment target] **********************************************************************************************************************************************************************
  
  TASK [check_config_static : Ensure TiDB host exists] *******************************************************************************************************************************************************
  
  TASK [check_config_static : Ensure PD host exists] *********************************************************************************************************************************************************
  
  TASK [check_config_static : Ensure TiKV host exists] *******************************************************************************************************************************************************
  
  TASK [check_config_static : Check ansible_user variable] ***************************************************************************************************************************************************
  
  TASK [check_config_static : Ensure timezone variable is set] ***********************************************************************************************************************************************
  
  TASK [check_config_static : Close old SSH control master processes] ****************************************************************************************************************************************
  ok: [localhost]
  
  TASK [check_config_static : Check ansible version] *********************************************************************************************************************************************************
  
  TASK [check_config_static : Check if jmespath installed] ***************************************************************************************************************************************************
  changed: [localhost]
  
  TASK [check_config_static : Check if jinja2 installed] *****************************************************************************************************************************************************
  changed: [localhost]
  
  TASK [check_config_static : Preflight check - Fail when jmespath or jinja2 isn't installed] ****************************************************************************************************************
  
  TASK [check_config_static : Get jmespath info] *************************************************************************************************************************************************************
  changed: [localhost]
  
  TASK [check_config_static : Get jmespath version] **********************************************************************************************************************************************************
  ok: [localhost]
  
  TASK [check_config_static : Get jinja2 info] ***************************************************************************************************************************************************************
  changed: [localhost]
  
  TASK [check_config_static : Get jinja2 version] ************************************************************************************************************************************************************
  ok: [localhost]
  
  TASK [check_config_static : Preflight check - Fail when the versions of jmespath and jinja2 doesn't meet the requirements] *********************************************************************************
  
  TASK [check_config_static : Check inventory configuration] *************************************************************************************************************************************************
  changed: [localhost]
  
  TASK [check_config_static : Preflight check - If the inventory configuration is correct] *******************************************************************************************************************
  
  PLAY [check node config] ***********************************************************************************************************************************************************************************
  
  TASK [pre-ansible : disk space check - fail when disk is full] *********************************************************************************************************************************************
  fatal: [localhost]: FAILED! =&gt;
    msg: |-
      The conditional check ' '100%' in disk_space_st.stdout ' failed. The error was: error while evaluating conditional ( '100%' in disk_space_st.stdout ): Unable to look up a name or access an attribute in template string ({% if  '100%' in disk_space_st.stdout  %} True {% else %} False {% endif %}).
      Make sure your variable name does not contain invalid characters like '-': argument of type 'StrictUndefined' is not iterable
          to retry, use: --limit @/home/tidb-ansible-master/retry_files/bootstrap.retry
  
  PLAY RECAP *************************************************************************************************************************************************************************************************
  localhost                  : ok=8    changed=5    unreachable=0    failed=1
  
  
  ERROR MESSAGE SUMMARY **************************************************************************************************************************************************************************************
  [localhost]: Ansible Failed! ==&gt;
  
    msg: |-
      The conditional check ' '100%' in disk_space_st.stdout ' failed. The error was: error while evaluating conditional ( '100%' in disk_space_st.stdout ): Unable to look up a name or access an attribute in template string ({% if  '100%' in disk_space_st.stdout  %} True {% else %} False {% endif %}).
      Make sure your variable name does not contain invalid characters like '-': argument of type 'StrictUndefined' is not iterable
  </code></pre>