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Context I am currently migrating a Web application from on-prem infrastructure to K8s. The legacy infrastructure relies on defining some tokens in the configuration files and these are replaced d...
#2: Post edited
by
Alexei
·
2022-12-23T13:28:04Z (over 1 year ago)
added relevant tags
#1: Initial revision
by
Alexei
·
2022-12-23T13:26:27Z (over 1 year ago)
How to inject environment configuration values when deploying an Angular application in Kubernetes or similar infrastructure?
## Context
I am currently migrating a Web application from on-prem infrastructure to K8s.
The legacy infrastructure relies on defining some tokens in the configuration files and these are replaced during the deployment as follows:
- ASP.NET Core: appsettings.json tokens are replaced
- Angular: replacements are done directly in the bundle js files
## The issue
While the .NET Core application features a designated configuration file (appsettings.json) which can be found in the Docker container, the Angular relies on `environment.{env}.ts` files which have their content bundled in the main js file.
This prevents one important aspect of the deployment: build (the Docker image) once and deploy in any environment.
How to make an Angular application allow its configuration data to be changed after the production build is created? (at Docker container level, not at image level)