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### How to pass parameter value to runcmd in OS::Heat::CloudConfig resource.

I'd like to pass string type value read from environment file as an argument to runcmd in OS::Heat::CloudConfig. Below is parameter definition.

  oam_stat_routes:
type: string
label: oam_stat_routes
description: List of static route destination on OAM side in CIDR notation.


Below is the CloudConfig definition with runcmd. What I want to do is to pass the value of oam_stat_routes to shell script command /usr/local/bin/set_route as an argument. Wonder if this is possible.

  dns_network:
type: OS::Heat::CloudConfig
properties:
cloud_config:
runcmd:
- /usr/local/bin/set_route oam_stat_routes