Linux lun mount and format/filesystem

[anonymus]

i am newbie on ansible

i wanted to do the below task using ansible , is there any playbook for

1. Discovering an iscsi target

2. Login in 

3. rescanning iscsi bus

4. formatting the newly discovered lun

5. creating filesystem on it.

6. updating /etc/fstab with newly mounted

[Paul Martin]

Hi,

I did this in the past for block storage, guessing something similar to this example,  I've not formatted the devices as this was for mounting a clone

  tasks:
# Rescan storage layer to pull in new devices to host
# Example here is for emulex hba
    - name: Rescan HBA
      command: /usr/bin/rescan-scsi-bus.sh

    - name: unmount filesystems by label
      mount:
        path: "{{ item }}"
        state: unmounted
      with_items:
        - /database
        - /reports
        - /logs

    - name: Create Directory
      file:
        path: "{{ item }}"
        state: directory
      with_items:
        - /database
        - /reports
        - /logs

    - name: Mount filesystems by label
      mount:
        path: "{{ item.mountpoint }}"
        src: LABEL="{{ item.label }}"
        fstype: ext4
        state: mounted
      with_items:
        - { label: 'database', mountpoint: '/database'}
        - { label: 'reports', mountpoint: '/reports'}
        - { label: 'logs', mountpoint: '/logs'}

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Paul Martin

[anonymus]

Thank you Paul.

[gajendra....@gmail.com]

Hello,

I have created below playbook, but i have not tested on live

check if its work for you. 

---

- name: disk addition

  hosts: localhost

  connection: local

  tasks:

  - name: Identify exiting disk

    shell: lsblk  | grep '^[a-z]' | grep -v sr0 | cut -f1 -d' '

    register: disk_list1

  - name: Scan Storage LUN

    shell: for host in `ls /sys/class/scsi_host/`;do echo "- - -" >/sys/class/scsi_host/${host}/scan; done

  - name: Identify exiting disk with new disk

    shell: lsblk  | grep '^[a-z]' | grep -v sr0 | cut -f1 -d' '

    register: disk_list2

  - debug: var=disk_list2

  - set_fact:

      new_disk: "{{ disk_list2.stdout_lines | difference(disk) }}"

  - name: Search storage LUN ID

    shell: ls -la /dev/disk/by-id/ | grep {{ new_disk[0] }} | grep scsi | awk -F'scsi-' '{print $NF}' | cut -f1 -d' '

    register: lun_id

    when: new_disk[0] is defined

  - name: Search Storage NAME DEIVCE PATH

    shell: multipath -ll "{{ lun_id.stdout }}" | cut -f1 -d' '

    register: device_name

    when: lun_id is defined and lun_id.stdout | length > 4

  - name: Create a PV

    shell: pvcreate /dev/mapper/{{ device_name }}

    register: pv_state

    when:  device_name.stdout is defined

  - name: Find VG name

    shell: df -hP "{{ filesystem }}" | sed -n '2p' | awk '{print $1}'|awk -F "/" '{print $NF}'|awk -F "-" '{print $(NF -1)}'

    register: vg_name

    when: pv_state.stdout is defined and pv_state.rc == 0

  - name: Extend VG {{ vg_name }}

    shell: vgextend {{ vg_name }} /dev/mapper/{{ device_name }}

    register: vg_state

    when: pv_state.stdout is defined and pv_state.rc == 0