Supported customizable features and capabilities

The following features and capabilities are customizable in a 12-factor app rock and charm:

• Adding configurations

• Adding actions

• Adding new dependencies in the OCI image

• Adding extra files or changing the project structure

• Database migrations

• Enabling supported relations

• Adding custom relations (via the public CustomRelation extension API)

• Handling secrets

• Application secret key storage and rotation

• Overriding commands

• Application and metrics ports and the metrics path via paas-config.yaml

• Additional Prometheus scrape jobs via prometheus.scrape_configs in paas-config.yaml

• Valkey integration through the valkey_client interface

• Structured framework logging in JSON via framework_logging_format: json in paas-config.yaml

• Task manager and scheduler

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