Rudder

We want to add a hook for pre and post node deletion event.

A first idea is to have the following parameters to each hook:

node-delete-pre:

Required information via Environment (in addition to any possible other default information – so it might be redundant):

• UUID of Node - RUDDER_NODEID
• Role(s) of Node (none / policy server / etc) – RUDDER_NODE_ROLES (?)
• Full patch of its policy root-directory (since it might be chained through different relays) – for cleanup – RUDDER_POLICIES_DIRECTORY
• Policy server it belongs to. – RUDDER_NODE_POLICY_SERVER (?)

Return code in addition to the default ones:

• Cancel the removal = 100
  • it would mean successful executed of the hook (without errors), but this node should not be removed (like protecting some nodes on the lowest level)
  • it should be returned differently than a hook-failure to the UI/API

node-delete-post:

Required information via Environment (in addition to any possible other default information – so it might be redundant):

• UUID of Node - RUDDER_NODEID
• Role(s) of Node (none / policy server / etc) – RUDDER_NODE_ROLES (?)
• Full patch of its policy root-directory (since it might be chained through different relays) – for cleanup – RUDDER_POLICIES_DIRECTORY
• Policy server it belongs to. – RUDDER_NODE_POLICY_SERVER (?)

Possible exit code strategies:

• Error in hook + warning in hook:
  • same behavior as an error would trigger in other hooks