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128 lines
2.7 KiB
Plaintext
128 lines
2.7 KiB
Plaintext
// Module is included in the following assemblies:
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//
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// serverless/knative_cli/knative-cli.adoc
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[id="basic-workflow_{context}"]
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= Basic workflow using `kn`
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The following basic workflow deploys a simple `hello` service that reads the environment variable `RESPONSE` and prints its output.
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You can use this guide as a reference to perform create, read, update, and delete (CRUD) operations on a service.
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.Procedure
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. Create a service in the `default` namespace from an image:
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----
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$ kn service create hello --image docker.io/openshift/hello-openshift --env RESPONSE="Hello Serverless!"
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----
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.Example output
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----
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Creating service 'hello' in namespace 'default':
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0.085s The Route is still working to reflect the latest desired specification.
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0.101s Configuration "hello" is waiting for a Revision to become ready.
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11.590s ...
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11.650s Ingress has not yet been reconciled.
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11.726s Ready to serve.
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Service 'hello' created with latest revision 'hello-gsdks-1' and URL:
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http://hello-default.apps-crc.testing
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----
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. List the service:
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----
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$ kn service list
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----
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.Example output
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----
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NAME URL LATEST AGE CONDITIONS READY REASON
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hello http://hello-default.apps-crc.testing hello-gsdks-1 8m35s 3 OK / 3 True
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----
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. Check if the service is working by using the `curl` service endpoint command:
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$ curl http://hello-default.apps-crc.testing
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----
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.Example output
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----
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Hello Serverless!
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----
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. Update the service:
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----
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$ kn service update hello --env RESPONSE="Hello OpenShift!"
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----
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.Example output
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----
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Updating Service 'hello' in namespace 'default':
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10.136s Traffic is not yet migrated to the latest revision.
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10.175s Ingress has not yet been reconciled.
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10.348s Ready to serve.
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Service 'hello' updated with latest revision 'hello-dghll-2' and URL:
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http://hello-default.apps-crc.testing
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----
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The service's environment variable `RESPONSE` is now set to "Hello OpenShift!".
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. Describe the service.
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----
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$ kn service describe hello
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----
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.Example output
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----
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Name: hello
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Namespace: default
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Age: 13m
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URL: http://hello-default.apps-crc.testing
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Revisions:
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100% @latest (hello-dghll-2) [2] (1m)
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Image: docker.io/openshift/hello-openshift (pinned to 5ea96b)
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Conditions:
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OK TYPE AGE REASON
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++ Ready 1m
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++ ConfigurationsReady 1m
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++ RoutesReady 1m
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----
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. Delete the service:
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----
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$ kn service delete hello
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----
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.Example output
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Service 'hello' successfully deleted in namespace 'default'.
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----
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Verify that the `hello` service is deleted by attempting to `list` it:
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----
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$ kn service list hello
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----
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.Example output
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----
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No services found.
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----
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