The engine report is a window into the internals of the agent. This is primarily useful to developers to help debug problems that may be occurring in deployed systems.
In order to manage complexity in the juju agents, there are workers that have very distinct and limited purpose. Workers can have dependencies on other workers. The dependency engine is the entity that runs the workers and deals with those dependencies. The
juju_engine_report is the current view into the dependency engine running the agent’s workers.
manifolds: agent: inputs:  report: agent: machine-0 model-uuid: 1b13f1f5-c0cf-47c5-86ae-55c393e19405 resource-log:  start-count: 1 started: 2018-08-09 22:01:39 state: started api-address-updater: inputs: - agent - api-caller - migration-fortress - migration-inactive-flag report: servers: - - 10.173.141.131:17070 - 127.0.0.1:17070 - '[::1]:17070' resource-log: - name: migration-inactive-flag type: '*engine.Flag' - name: migration-fortress type: '*fortress.Guest' - name: agent type: '*agent.Agent' - name: api-caller type: '*base.APICaller' start-count: 1 started: 2018-08-09 22:01:41 state: started api-caller: inputs: - agent - api-config-watcher resource-log: - name: agent type: '*agent.Agent' start-count: 1 started: 2018-08-09 22:01:40 state: started # and many more