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The changeset also makes the control service responsible for flyway migrations. This helps reduce the number of places the database configuration needs to be spread out. These automatic migrations can be disabled with -DdisableFlyway=true. The commit also adds curl to the docker container, to enable docker health checks and interdependencies. |
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Control Service
The control service provides an operator's user interface. By default this interface is exposed on port 8081. It does not offer any sort of access control or authentication.
The control service will itself execute tasks that affect the entire system, but delegate node-specific tasks to the corresponding executor-service via the executor-api.
Conceptually the application is broken into three parts:
- Application specific tasks relate to the high level abstractions such as blacklisting and API keys
- System tasks relate to low level abstractions such as the message queue and event log.
- Node tasks relate to index node specific tasks, such as crawling and indexing.
Central Classes
See Also
- processes
- libraries/message-queue - The Message Queue and Actor abstractions