January 2019
Intermediate to advanced
520 pages
14h 32m
English
Content preview from Hands-On Microservices with Rust
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DBSync worker container
Now we can add the dbsync worker that applies migrations to a database instance. We use a local image that will be built with Dockerfile from the ./microservices/dbsync folder that we used as a value for the build parameter. This worker depends on a database container (called db) and we set this dependency with the depends_on parameter.
Dependencies don't mean the dependant container will be started when the necessary application is ready to work. It only refers to the order in which containers are started; the application that your microservice needs might not be ready. You have to control the readiness of the application, as we did for dbsync, with a loop that tries to connect to a database till it is available. ...
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