Configure Harvest (advanced)

This chapter describes additional advanced configuration possibilities of NetApp Harvest. For a typical installation, this level of detail is likely not needed.

Variable Expansion

The harvest.yml configuration file supports variable expansion. This allows you to use environment variables in the configuration file. Harvest will expand strings with the format $__env{VAR} or ${VAR}, replacing the variable VAR with the value of the environment variable. If the environment variable is not set, the variable will be replaced with an empty string.

Here's an example snippet from harvest.yml:

Pollers:
  netapp_frankfurt:
    addr: 10.0.1.2
    username: $__env{NETAPP_FRANKFURT_RO_USER}
  netapp_london:
    addr: uk-cluster
    username: ${NETAPP_LONDON_RO_USER}
  netapp_rtp:
    addr: 10.0.1.4
    username: $__env{NETAPP_RTP_RO_USER}

If you set the environment variable NETAPP_FRANKFURT_RO_USER to harvest1 and NETAPP_LONDON_RO_USER to harvest2, the configuration will be expanded to:

Pollers:
  netapp_frankfurt:
    addr: 10.0.1.2
    username: harvest1
  netapp_london:
    addr: uk-cluster
    username: harvest2
  netapp_rtp:
    addr: 10.0.1.4
    username: