heat_template_version: queens

description: Sets up MPIO and udev rules on all nodes

parameters:
  servers:
    type: json

resources:
    PureSetup:
      type: OS::Heat::SoftwareConfig
      properties:
        group: script
        config: |
          #!/bin/bash
          sudo mpathconf --enable --with_multipathd yes
          cat <<EOF >>/tmp/multipath.conf
          defaults {
            polling_interval      10
          }
          devices {
            device {
                vendor "PURE"
                product "FlashArray"
                fast_io_fail_tmo 10
                path_grouping_policy "group_by_prio"
                failback "immediate"
                prio "alua"
                hardware_handler "1 alua"
                max_sectors_kb 4096
              }
          }
          sudo cat /tmp/multipath.conf >>/etc/multipath.conf
          sudo systemctl start multipathd 
          sudo systemctl enable multipathd 
          cat <<EOF >>/tmp/99-pure-storage.rules
          # Recommended settings for Pure Storage FlashArray.
          # Use noop scheduler for high-performance solid-state storage for SCSI devices
          ACTION=="add|change", KERNEL=="sd*[!0-9]", SUBSYSTEM=="block", ENV{ID_VENDOR}=="PURE", ATTR{queue/scheduler}="none"
          ACTION=="add|change", KERNEL=="dm-[0-9]*", SUBSYSTEM=="block", ENV{DM_NAME}=="3624a937*", ATTR{queue/scheduler}="none"
          # 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"
          ACTION=="add|change", KERNEL=="dm-[0-9]*", SUBSYSTEM=="block", ENV{DM_NAME}=="3624a937*", 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"
          ACTION=="add|change", KERNEL=="dm-[0-9]*", SUBSYSTEM=="block", ENV{DM_NAME}=="3624a937*", 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
          sudo cp /tmp/99-pure-storage.rules /etc/udev/rules.d/99-pure-storage.rules
          sudo /sbin/udevadm control --reload-rules
          sudo /sbin/udevadm trigger --type=devices --action=change

    ExtraDeployment:
      type: OS::Heat::SoftwareDeploymentGroup

      properties:
        servers: {get_param: servers}
        config: {get_resource: PureSetup}
        actions: [CREATE,UPDATE]