$ kn func build
To run a function, you first must build the function project. This happens automatically when using the kn func run
command, but you can also build a function without running it.
Before you can run a function, you must build the function project. If you are using the kn func run
command, the function is built automatically. However, you can use the kn func build
command to build a function without running it, which can be useful for advanced users or debugging scenarios.
The kn func build
command creates an OCI container image that can be run locally on your computer or on an OpenShift Container Platform cluster. This command uses the function project name and the image registry name to construct a fully qualified image name for your function.
By default, kn func build
creates a container image by using Red Hat Source-to-Image (S2I) technology.
$ kn func build
The OpenShift Container Registry is used by default as the image registry for storing function images.
$ kn func build
Building function image
Function image has been built, image: registry.redhat.io/example/example-function:latest
You can override using OpenShift Container Registry as the default image registry by using the --registry
flag:
$ kn func build --registry quay.io/username
Building function image
Function image has been built, image: quay.io/username/example-function:latest