After month of working great and no changes, Rudder agent stopped to expand variables
On a Rudder node I had an old configuration using "file_lines_present" which showed a very surprising behaviour last week.
The configuration did not change for months on this node.
I had a "file_lines_present" to setup some special crontab rules in /etc/crontab using variables. It has work for months, but suddenly, the variable stopped to be expanded in the file.
The agent was updated 10 days before it happened, so I do not think it is correlated. The reports were "success" even if the variable was not expanded, this is VERY misleading.