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heat_template_version: 2014-10-16
description: >
Extra config to add swap space to nodes.
# Parameters passed from the parent template - note if you maintain
# out-of-tree templates they may require additional parameters if the
# in-tree templates add a new role.
parameters:
servers:
type: json
swap_size_megabytes:
type: string
description: Amount of swap space to allocate in megabytes
default: '4096'
swap_path:
type: string
description: Full path to location of swap file
default: '/swap'
resources:
SwapConfig:
type: OS::Heat::SoftwareConfig
properties:
group: script
config: |
#!/bin/bash
set -eux
if [ ! -f $swap_path ]; then
dd if=/dev/zero of=$swap_path count=$swap_size_megabytes bs=1M
chmod 0600 $swap_path
mkswap $swap_path
swapon $swap_path
else
echo "$swap_path already exists"
fi
echo "$swap_path swap swap defaults 0 0" >> /etc/fstab
inputs:
- name: swap_size_megabytes
description: Amount of swap space to allocate in megabytes
default: '4096'
- name: swap_path
description: Full path to location of swap file
default: '/swap'
{% for role in roles %}
{{role.name}}SwapDeployment:
type: OS::Heat::SoftwareDeploymentGroup
properties:
config: {get_resource: SwapConfig}
servers: {get_param: [servers, {{role.name}}]}
input_values:
swap_size_megabytes: {get_param: swap_size_megabytes}
swap_path: {get_param: swap_path}
actions: ["CREATE"]
{% endfor %}
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