ocp

The goal of this article is to display a simple hello-world apps build on top of a .net core 7 that can be use to test a deployment to Openshift 4 platform. And we can start it by using a git clone command

$ git clone https://github.com/edwin/hello-world-dot-net-core

Go to the corresponding folder,

$ cd hello-world-dot-net-core

Create a namespace for this app,

$ oc new-project dot-net-ns

And run this command within the sourcecode folder,

$ oc new-app dotnet:7.0-ubi8~.

It will generate logs like this,

warning: Cannot check if git requires authentication.
--> Found image 4466483 (2 months old) in image stream "openshift/dotnet" under tag "7.0-ubi8" for "dotnet:7.0-ubi8"

    .NET 7
    ------
    Platform for building and running .NET 7 applications

    Tags: builder, .net, dotnet, dotnetcore, dotnet-70

    * A source build using source code from https://github.com/edwin/hello-world-dot-net-core#master will be created
      * The resulting image will be pushed to image stream tag "hello-world-dot-net-core:latest"
      * Use 'oc start-build' to trigger a new build

--> Creating resources ...
    imagestream.image.openshift.io "hello-world-dot-net-core" created
    buildconfig.build.openshift.io "hello-world-dot-net-core" created
    deployment.apps "hello-world-dot-net-core" created
    service "hello-world-dot-net-core" created
--> Success
    Build scheduled, use 'oc logs -f buildconfig/hello-world-dot-net-core' to track its progress.
    Application is not exposed. You can expose services to the outside world by executing one or more of the commands below:
     'oc expose service/hello-world-dot-net-core'
    Run 'oc status' to view your app.

And finally we can create a route for this service,

$ oc create route edge --service=hello-world-dot-net-core

We can try to do some changes on Index.cshtml file,

@{
    ViewData["Title"] = "Home Page";
}

<div class="text-center">
    <h1 class="display-4">Welcome</h1>
    <p>Learn about <a href="https://redhat.com">Red Hat loves dotnet</a>.</p>
</div>

Save and redeploy it by running below command in the root sourcecode folder,

$ oc start-build hello-world-dot-net-core --from-dir=.

The result would be something like this,

Lets do some more changes, and deploy it to Openshift

@{
    ViewData["Title"] = "Home Page";
}

<div class="text-center">
    <h1 class="display-4">Welcome</h1>
    <p>Learn about <a href="https://redhat.com">Red Hat loves alot of programming language but we loves dotnet more</a>.</p>
</div>

And we instantly can see changes within the web page,

Code can be seen here,

https://github.com/edwin/hello-world-dot-net-core