Application Configuration Changes Across Different Environments
In the last section, we created containers based on the same Docker image in each environment. A microservice will have configuration settings that likely need to change per environment, like feature flags to dynamically control service capabilities (turn on or off product recommendations), API keys for third-party services, or connection strings to dependent services like a web front end, database, or a logging service. These configuration settings can be changed per environment in a number of ways:
• Use a Docker volume-mounted configuration file (for example, myservice.conf) that is deployed along with the container and is unique to each environment, similar to the example in ...
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