Add a Prometheus version detection helper
Summary
Add Prometheus version detection helper
Proposal
Add a Prometheus version detection helper to assist in the Prometheus 2.0 upgrade
Version 1.x:
- Detect the file
#{node['gitlab']['prometheus']['home']}/data/heads.db - Detect the version in the output of
prometheus --version
Version 2.x:
- Detect the directory
#{node['gitlab']['prometheus']['home']}/data/wal/ - Detect the version in the output of
prometheus --version
References
Related: #2940 (closed)