heat_template_version: wallaby

description: Template file to add a swap partition to a node.

parameters:
  servers:
    type: json
  swap_partition_label:
    type: string
    description: Swap partition label
    default: 'swap1'

resources:
  SwapConfig:
    type: OS::Heat::SoftwareConfig
    properties:
      group: script
      config: |
        #!/bin/bash
        set -eux
        if [ -e "/dev/disk/by-label/${swap_partition_label}" ]; then
          swap_partition=$(realpath /dev/disk/by-label/${swap_partition_label})
          if ! grep -qe "${swap_partition}" /etc/fstab; then
            echo "$swap_partition swap swap defaults 0 0" | tee -a /etc/fstab
          fi
        else
          for item in $(lsblk -f --output FSTYPE,UUID | awk '/swap/ {print $2}'); do
            if ! grep -qe "${item}" /etc/fstab; then
              echo -e "UUID=${item} swap swap defaults 0 0" | tee -a /etc/fstab
            fi
          done
        fi
        swapon -a
      inputs:
        - name: swap_partition_label
          description: Swap partition label
          default: 'swap1'

{% for role in roles %}
  {{role.name}}SwapDeployment:
    type: OS::Heat::SoftwareDeploymentGroup
    properties:
      name: {{role.name}}SwapDeployment
      config: {get_resource: SwapConfig}
      servers: {get_param: [servers, {{role.name}}]}
      input_values:
        swap_partition_label: {get_param: swap_partition_label}
      actions: ["CREATE"]
{% endfor %}