Creating Applications using the CLI
You can create an OpenShift Container Platform application from components that include source or binary code, images, and templates by using the OpenShift Container Platform CLI.
The set of objects created by new-app depends on the artifacts passed as input: source repositories, images, or templates
Creating an application from source code
With the new-app command you can create applications from source code in a local or remote Git repository.
The new-app command creates a build configuration, which itself creates a new application image from your source code. The new-app command typically also creates a DeploymentConfig object to deploy the new image, and a service to provide load-balanced access to the deployment running your image.
OpenShift Container Platform automatically detects whether the pipeline or source build strategy should be used, and in the case of source builds, detects an appropriate language builder image.
To create an application from a Git repository in a local directory:
oc new-app /<path to source code>
To create an application from a remote Git repository:
oc new-app https://github.com/sclorg/cakephp-ex
To create an application from a private remote Git repository:
oc new-app https://github.com/youruser/yourprivaterepo --source-secret=yoursecret
If you use the source build strategy, new-app attempts to determine the language builder to use by the presence of certain files in the root or specified context directory of the repository:
|ruby||Gemfile, Rakefile, config.ru|
After a language is detected, new-app searches the OpenShift Container Platform server for image stream tags that have a supports annotation matching the detected language, or an image stream that matches the name of the detected language. If a match is not found, new-app searches the Docker Hub registry for an image that matches the detected language based on name.
You can override the image the builder uses for a particular source repository by specifying the image, either an image stream or container specification, and the repository with a ~ as a separator. Note that if this is done, build strategy detection and language detection are not carried out.
Creating an application from an image
You can deploy an application from an existing image. Images can come from image streams in the OpenShift Container Platform server, images in a specific registry, or images in the local Docker server.
The new-app command attempts to determine the type of image specified in the arguments passed to it. However, you can explicitly tell new-app whether the image is a container image using the --docker-image argument or an image stream using the -i|--image-stream argument.
Creating an application from a template
You can create an application from a previously stored template or from a template file, by specifying the name of the template as an argument. For example, you can store a sample application template and use it to create an application.
Upload an application template to your current project’s template library. The following example uploads an application template from a file called
oc create -f examples/sample-app/application-template-stibuild.json
Then create a new application by referencing the application template. In this example, the template name is ruby-helloworld-sample:
oc new-app ruby-helloworld-sample
To create a new application by referencing a template file in your local file system, without first storing it in OpenShift Container Platform, use the -f|--file argument. For example:
oc new-app -f examples/sample-app/application-template-stibuild.json