3.9. Build environments
As with pod environment variables, build environment variables can be defined in terms of references to other resources or variables using the Downward API. There are some exceptions, which are noted.
You can also manage environment variables defined in the BuildConfig
with the oc set env
command.
Referencing container resources using valueFrom
in build environment variables is not supported as the references are resolved before the container is created.
3.9.1. Using build fields as environment variables
You can inject information about the build object by setting the fieldPath
environment variable source to the JsonPath
of the field from which you are interested in obtaining the value.
Jenkins Pipeline strategy does not support valueFrom
syntax for environment variables.
Procedure
Set the
fieldPath
environment variable source to theJsonPath
of the field from which you are interested in obtaining the value:env: - name: FIELDREF_ENV valueFrom: fieldRef: fieldPath: metadata.name
3.9.2. Using secrets as environment variables
You can make key values from secrets available as environment variables using the valueFrom
syntax.
Procedure
To use a secret as an environment variable, set the
valueFrom
syntax:apiVersion: v1 kind: BuildConfig metadata: name: secret-example-bc spec: strategy: sourceStrategy: env: - name: MYVAL valueFrom: secretKeyRef: key: myval name: mysecret