check_filesystem.yml

---

- name: Get ansible_mounts fact
  setup:
    gather_subset: hardware
    filter: ansible_mounts

- name: Determine which mountpoint that tikv data dir exists on
  shell: "df {{ tikv_data_dir }} | tail -n1 | awk '{print $NF}'"
  register: deploy_partition
  changed_when: False

- set_fact:
    xfs_filesystem: "true"
  when:
    - item.mount == deploy_partition.stdout
    - item.fstype == 'xfs'
  with_items: "{{ ansible_mounts }}"

- name: Preflight check - Check bug if filesystem is xfs
  shell: cd {{ tikv_data_dir }} && fallocate -n -o 0 -l 9192 tidb_test && printf 'a%.0s' {1..5000} > tidb_test && truncate -s 5000 tidb_test && fallocate -p -n -o 5000 -l 4192 tidb_test && LANG=en_US.UTF-8  stat tidb_test |awk 'NR==2{print $2}'
  register: xfs_result
  when:
    - xfs_filesystem is defined
    - xfs_filesystem

- name: Clean check file for xfs filesystem
  file: path={{ tikv_data_dir }}/tidb_test state=absent
  when:
    - xfs_filesystem is defined
    - xfs_filesystem

- set_fact:
    ext4_filesystem_alert: "true"
  when:
    - item.mount == deploy_partition.stdout
    - item.fstype == 'ext4'
    - item.options.find("nodelalloc") == -1
  with_items: "{{ ansible_mounts }}"

- name: Preflight check - Does tikv data dir meet ext4 file system requirement
  fail:
    msg: "You don't mount the file system of {{ deploy_partition.stdout }} with ext4 nodelalloc option. See https://github.com/pingcap/docs/blob/master/online-deployment-using-ansible.md#step-8-mount-the-data-disk-ext4-filesystem-with-options-on-the-target-machines."
  when:
    - ext4_filesystem_alert is defined
    - ext4_filesystem_alert

- name: Preflight check - Set fssystem_check_result fact
  set_fact:
    fssystem_check_result: true
  when: "(item.mount == deploy_partition.stdout and item.fstype == 'ext4') or (xfs_filesystem is defined and xfs_filesystem and xfs_result.stdout|int == 5000)"
  with_items: "{{ ansible_mounts }}"

- name: Preflight check - Does tikv data dir meet ext4 or xfs file system requirement
  fail:
    msg: 'The file system mounted at {{ item.mount }} does not meet ext4 or xfs file system requirement'
  when:
    - item.mount == deploy_partition.stdout
    - fssystem_check_result is not defined
  with_items: "{{ ansible_mounts }}"