10 KiB
CLI Commands
create
Creates a new Function project at path. If path is unspecified, assumes the current directory. If path does not exist, it will be created. The function name is the name of the leaf directory at path. The user can specify the runtime and template with flags.
Function name must consist of lower case alphanumeric characters or '-', and must start and end with an alphanumeric character (e.g. 'my-name', or '123-abc', regex used for validation is 'a-z0-9?').
The files written upon create include an example Function of the specified language runtime, example tests, and a metadata file func.yaml. Together, these are referred to as a Template. Included are the templates 'http' and 'events' (default is 'http') for each language runtime. A template can be pulled from a specific Git repository by providing the --repository flag, or from a locally installed repository using the repository's name as a prefix. See the Templates Guide for more information.
Similar kn command: none.
func create <path> [-l <runtime> -t <template> -r <repository>]
When run as a kn plugin.
kn func create <path> [-l <runtime> -t <template> -r <repository>]
build
Builds the Function project in the current directory. Reads the func.yaml file to determine image name and registry. If both of these values are unset in the configuration file, the user is prompted to provide a registry, from there an image name can be derived. The image name and registry may also be specified as flags, as can the path to the project.
The value(s) provided for image and registry are persisted to the func.yaml file so that subsequent invocations do not require the user to specify these again.
Similar kn command: none.
func build [-i <image> -r <registry> -p <path>]
When run as a kn plugin.
kn func build [-i <image> -r <registry> -p <path>]
run
Runs the Function project locally in the container. If a container has not yet been created, prompts the user to run func build. The user may specify a path to the project directory using the --path or -p flag. The user may set an environment variable by using --env or -e flag, e.g. -e VAR_NAME=VAR_VALUE. To unset a variable dash - suffix is used, e.g. -e VAR_NAME-.
Similar kn command: none.
func run
When run as a kn plugin.
kn func run [-p <path>]
deploy
Deploys the Function project in the current directory. The user may specify a path to the project directory using the --path or -p flag. Reads the func.yaml configuration file to determine the image name. An image and registry may be specified on the command line using the --image or -i and --registry or -r flag. The user may set an environment variable by using --env or -e flag, e.g. -e VAR_NAME=VAR_VALUE. To unset a variable dash - suffix is used, e.g. -e VAR_NAME-.
Derives the service name from the project name. There is no mechanism by which the user can specify the service name. The user must have already initialized the function using func create or they will encounter an error.
If the Function is already deployed, it is updated with a new container image that is pushed to a container image registry, and the Knative Service is updated.
By default the Function image to be deployed is also built. The build can be skipped by specifying --build=false.
The namespace into which the project is deployed defaults to the value in the func.yaml configuration file. If NAMESPACE is not set in the configuration, the namespace currently active in the Kubernetes configuration file will be used. The namespace may be specified on the command line using the --namespace or -n flag, and if so this will overwrite the value in the func.yaml file.
Similar kn command: kn service create NAME --image IMAGE [flags]. This command allows a user to deploy a Knative Service by specifying an image, typically one hosted on a public container registry such as docker.io. The deployment options which the kn command affords the user are quite broad. The kn command in this case is quite effective for a power user. The func deploy command has a similar end result, but is definitely easier for a user just getting started to be successful with.
func deploy [-n <namespace> -p <path> -i <image> -r <registry> -b=true|false]
When run as a kn plugin.
kn func deploy [-n <namespace> -p <path> -i <image> -r <registry> -b=true|false]
describe
Prints the name, route and any event subscriptions for a deployed Function. The user may also specify the name of the function to describe. The namespace defaults to the value in func.yaml or the namespace currently active in the user's Kubernetes configuration. The namespace may be specified on the command line, and if so this will overwrite the value in func.yaml.
Similar kn command: kn service describe NAME [flags]. This flag provides a lot of nice information not available in func describe, such as revisions, age, annotations and labels. This command should be renamed to make it distinct from kn - e.g. func status.
func describe [-o <output> -n <namespace> -p <path>]
When run as a kn plugin.
kn func describe [-o <output> -n <namespace> -p <path>]
list
Lists all deployed functions. The namespace defaults to the value in func.yaml or the namespace currently active in the user's Kubernetes configuration. The namespace defaults to the value in func.yaml or the namespace currently active in the user's Kubernetes configuration. The namespace may be specified on the command line, and if so this will overwrite the value in func.yaml.
Similar kn command: kn service list [name] [flags]. This command lists all deployed Knative Services. As with other kn commands that have similar functionality, there is more information and flexibilty in the kn command. However, kn will return all Services, while func list will only display the boson functions that have been deployed. Consider improving the output of the func list command so that it is at least as informative as kn service list.
func list [-n <namespace> -p <path>]
When run as a kn plugin.
kn func list [-n <namespace> -p <path>]
delete
Removes a deployed function from the cluster. The user may specify a function by name, path. If both of those are provided the command will not be executed and user will receive an error message. If neither of those are provided, the current directory will be searched for a func.yaml configuration file to determine the function to be removed. The namespace defaults to the value in func.yaml or the namespace currently active in the user's Kubernetes configuration. The namespace may be specified on the command line, and if so this will overwrite the value in func.yaml.
Similar kn command: kn service delete NAME [flags].
func delete <name> [-n namespace, -p path]
When run as a kn plugin.
kn func delete <name> [-n namespace, -p path]
emit
Emits a CloudEvent, sending it to the deployed function. The user may specify the event type, source and ID,
and may provide event data on the command line or in a file on disk. By default, event works on the local
directory, assuming that it is a function project. Alternatively the user may provide a path to a project
directory using the --path flag, or send an event to an arbitrary endpoint using the --sink flag. The
--sink flag also accepts the special value local to send an event to the function running locally, for
example, when run via func run.
Similar kn command when using the kn-plugin-event: kn event send [FLAGS]
Examples:
# Send a CloudEvent to the deployed function with no data and default values
# for source, type and ID
kn func emit
# Send a CloudEvent to the deployed function with the data found in ./test.json
kn func emit --file ./test.json
# Send a CloudEvent to the function running locally with a CloudEvent containing
# "Hello World!" as the data field, with a content type of "text/plain"
kn func emit --data "Hello World!" --content-type "text/plain" -s local
# Send a CloudEvent to the function running locally with an event type of "my.event"
kn func emit --type my.event --sink local
# Send a CloudEvent to the deployed function found at /path/to/fn with an id of "fn.test"
kn func emit --path /path/to/fn -i fn.test
# Send a CloudEvent to an arbitrary endpoint
kn func emit --sink "http://my.event.broker.com"
config
Invokes interactive prompt that manages configuration of the Function project in the current directory.
The user may specify a path to the project directory using the --path or -p flag. This command operates on configuration
specified in func.yaml configuration file.
Users need to deploy or update the function with func deploy in order to apply the updated configuration to the deployed function.
This command has subcommands envs and volumes to manage directly the specific resouces: Environment variables and Volumes.
These subcommands has commands add and remove to add and remove specified resouces.
Invokes top level interactive prompt that allows choosing the resouce and operation:
func config [-p <path>]
Example:
func config
? What do you want to configure? Volumes
? What operation do you want to perform? List
Configured Volumes mounts:
- Secret "mysecret" mounted at path: "/workspace/secret"
- ConfigMap "mycm" mounted at path: "/workspace/configmap"
config envs
This command lists configured Environment variables:
func config envs [-p <path>]
Invokes interactive prompt to add Environment variables to the function configuration
func config envs add [-p <path>]
Invokes interactive prompt to remove Environment variables from the function configuration
func config envs remove [-p <path>]
config volumes
This command lists configured Volumes:
func config volumes [-p <path>]
Invokes interactive prompt to add Volumes to the function configuration
func config volumes add [-p <path>]
Invokes interactive prompt to remove Volumes from the function configuration
func config volumes remove [-p <path>]