enable-mpio-linux.yaml

---
- hosts: "{{ cloud_initiator }}"
  become: true
  gather_facts: yes
  vars:
    ansible_python_interpreter: auto

  tasks:

        - name: Remove 51-ec2-hvm-devices udev rules if Amazon Linux 2
          file:
            path: /etc/udev/rules.d/51-ec2-hvm-devices.rules
            state: absent
          when:
            - ansible_distribution_file_variety == 'Amazon'
            - ansible_distribution_major_version == '2'

        - name: Create 99-pure-storage udev rules
          shell:
            cmd: |
              cat > /lib/udev/rules.d/99-pure-storage.rules <<EOF
              # Recommended settings for Pure Storage FlashArray.cat

              # Use noop scheduler for high-performance solid-state storage
              ACTION=="add|change", KERNEL=="sd*[!0-9]", SUBSYSTEM=="block", ENV{ID_VENDOR}=="PURE", ATTR{queue/scheduler}="noop"

              # Reduce CPU overhead due to entropy collection
              ACTION=="add|change", KERNEL=="sd*[!0-9]", SUBSYSTEM=="block", ENV{ID_VENDOR}=="PURE", ATTR{queue/add_random}="0"

              # Spread CPU load by redirecting completions to originating CPU
              ACTION=="add|change", KERNEL=="sd*[!0-9]", SUBSYSTEM=="block", ENV{ID_VENDOR}=="PURE", ATTR{queue/rq_affinity}="2"

              # Set the HBA timeout to 60 seconds
              ACTION=="add|change", KERNEL=="sd*[!0-9]", SUBSYSTEM=="block", ENV{ID_VENDOR}=="PURE", ATTR{device/timeout}="60"
              EOF

        - name: Reload new udev rules and trigger
          shell:
            cmd: udevadm control --reload-rules && udevadm trigger

        - name: Install multipath tools when Ubuntu
          apt: name=multipath-tools update_cache=yes state=latest force_apt_get=yes
          register: multipathtools
          when: ansible_distribution_file_variety == 'Debian'

        - name: Install multipath tools if when Amazon Linux 2
          yum:
            name: device-mapper-multipath
            state: latest
          register: device_mapper_multipath
          when:
            - ansible_distribution_file_variety == 'Amazon'
            - ansible_distribution_major_version == '2'

        - debug:
            var: device_mapper_multipath

        - name: Install multipath tools on SUSE
          zypper:
            name: multipath-tools
            state: latest
          register: multipathtools
          when: ansible_distribution_file_variety == 'SUSE'

        - name: multipathtools
          debug:
            var: multipathtools

        - name: Enable default multipath configuration file and start the multipath daemon when Amazon Linux 2
          shell:
            cmd: mpathconf --enable --with_multipathd y
          when:
            - ansible_distribution_file_variety == 'Amazon'
            - ansible_distribution_major_version == '2'

        - name: create/edit multipath.conf
          shell:
            cmd: |
              cat > /etc/multipath.conf <<EOF
              defaults {
                    polling_interval 10
              }
              devices {
                    device {
                            vendor "PURE"
                            product "FlashArray"
                            path_grouping_policy "group_by_prio"
                            path_checker "tur"
                            fast_io_fail_tmo 10
                            dev_loss_tmo 60
                            no_path_retry 0
                            hardware_handler "1 alua"
                            prio "alua"
                            failback "immediate"
                    }
              }
              blacklist {
                    devnode "^(ram|raw|loop|fd|md|dm-|sr|scd|st)[0-9]*"
                    devnode "^(td|ha)d[a-z]"
                    devnode "^nxb*"
                    devnode "^nvme*"
              }
              EOF

        - name: restart multipathd service
          service:
            name: multipathd
            state: restarted
          when: (ansible_distribution_file_variety == 'Debian') or
                (ansible_distribution_file_variety == 'Amazon' and ansible_distribution_major_version == '2')

        - name: start multipath daemon
          shell:
            cmd: modprobe dm-multipath
          when: ansible_distribution_file_variety == 'SUSE'

        - name: start multipathd service
          service:
            name: multipathd
            state: started
          when: ansible_distribution_file_variety == 'SUSE'

        - name: multipath -v3
          shell:
            cmd: multipath -v2
          when: ansible_distribution_file_variety == 'SUSE'

        - name: register multipath -ll output
          shell:
            cmd: multipath -ll
          register: multipathll

        - name: print multipath -ll output
          debug:
            var: multipathll