Deprecation: Removal of support for Ohai version 6 plugins (OHAI-10)
Ohai 7.0 released with Chef Client 11.12 introduced an improved plugin DSL model. At the time we introduced deprecations for the existing plugin DSL, which we referred to as V6 plugins. In Ohai/Chef Client 14 we will remove the support for Ohai V6 plugins, causing a runtime error if they are used.
Remediation
If you have custom Ohai V6 plugins installed via cookbook or bootstrap you will need to update these plugins to the Ohai V7 plugin format.
See the Ohai Custom Plugins page for additional information on writing V7 plugins.