Rudder

This lib will be part of 20_cfe_basics.

It will allow storing a persisting database of flags that will be usable in the agents. Flags are somehow like persistent conditions but:

• They have no expiration date
• They are kept when resetting agent state

This will allow use cases like executing a command only once on a system.

The storage format will be a json file containing:

{
  "flag_name_1": { "created": "20181008-...." },
  "flag_name_2": { "created": "20181008-...." }
}

The file is by default in /var/rudder/agent-data/flags.json, and configurable in ncf.conf.

This library should provide methods to:

• Load the flags into a variable
• Reserve a flag (set the persistent class, fails of already present)
• Set a flag
• (Get a flag)
• (Unset a flag)