Minimal "hello, world" container image based on Red Hat's Universal Base Image (UBI) for a PHP application.
The default Dockerfile uses the standard UBI image for RHEL 7 and PHP with Apache HTTPd from the Software Collections Library (SCL).
There are also Dockerfile variants using UBI for RHEL 8 and the minimal UBI container images. The RHEL 8 variants take PHP and Apache HTTPd from AppStreams because there are no more SCLs for RHEL 8.
For more information about UBI, see: https://www.redhat.com/en/blog/introducing-red-hat-universal-base-image and https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html-single/building_running_and_managing_containers/index?lb_target=stage#using_red_hat_universal_base_images_standard_minimal_and_runtimes
For more information about SCL, see: https://access.redhat.com/documentation/en-us/red_hat_software_collections/3/
This is a long-running container that returns a "Hello, world!" HTML page. Not very dynamic, I know. ;-) Just make sure you see no '<?php' tags in the generated page.
You need a Red Hat Developer's account to grab the service account user name and token to download the UBI base images. It is free. :-) You can also use the unauthenticated registry while it is still available.
Register at https://developers.redhat.com and, while logged in to the Developer's web site, access https://access.redhat.com/terms-based-registry/ to create your registry service account.
On RHEL 7.6+, CentOS, and Fedora, you do:
$ sudo podman login -u <your service account name> -p <your service account token>
$ sudo podman build -t php-ubi .
$ sudo podman run --name hello -p 8080:8080 -d localhost/php-ubi
$ curl localhost:8080
<html>
<body>
Hello world!
</body>
</html>
$ sudo podman stop hello
$ sudo podman rm hello
You could use the docker command but I like podman more. I suppose podman is available from other Linux distros, I don't know about Windows and MacOS.
This container image works on OpenShift using the default security policy.
-
Download your service account from https://access.redhat.com/terms-based-registry/ as an OpenShift secret.
-
Create a new project and create a secret from the file you downloaded in the previous step.
-
Links that secret to your project's builder service account.
-
Create an application (that is, a bc, dc, and svc) that points to this GitHub project
-
Wait for the build to finish
-
Wait for the applicaiton pod to be ready and running
-
Expose your application's service throgh a route
-
Use curl to test the route. Use 'oc get route' of you do not know yours route's URL
Here are the commands you'd perform:
$ oc new-project myproj
$ oc create -f my-service-account-pull-secret.yaml
$ oc secrets link builder my-service-account-pull-secret
$ oc new-app --name hello https://github.com/flozanorht/testphp-ubi.git
$ oc logs -f bc/hello
$ oc get pod
$ oc expose svc hello
$ curl hello-myproj.mycluster.example.com
These commands should work on both OpenShift 3.x and 4.x
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