s2i | OpenShift S2I images for Java and Karaf applications | Cloud library

The error is right in the message - pull access denied. You also have a second issue in your FROM statement in that you aren't specifying the full path the image you linked.

So you have two things to resolve:

1. When you pull from redhat's registry, you'll need to provide the full URL and not just the image name. For the image you linked, that means you need "FROM registry.redhat.io/ubi8/s2i-base:rhel18.5 as Builder`.
2. When you use Redhat's registry, they want you to create a service account and login with it. They provide instructions on how to do this under the "Get This Image" tag, but in short you need to use docker login to login to registry.redhat.io before you run your docker build command.

After you've resolved those issues, you have a third issue in your Dockerfile that you'll need to resolve:

1. You're using the apk package manager to attempt to install packages, which is the package manager for Alpine linux. The image you're attempting to extend uses the yum package manager instead (you can see this in the provided Dockerfile for it), and so will need to use that package manager instead to install your dependencies.

Between those things, your pull access should be authorized correctly, and your build issues resolved.

On Openshift the loggerManager was of type java.util.logManager while on local system the loggerManager was of type org.jboss.logmanager.LogManager

By starting on Openshift the java process with the property: -Djava.util.logging.manager=org.jboss.logmanager.LogManager The log was written as JSON.

Your best bet would be to get familiar with the official docs.

Pod's DNS Config:

Pod's DNS Config allows users more control on the DNS settings for a Pod.

The dnsConfig field is optional and it can work with any dnsPolicy settings. However, when a Pod's dnsPolicy is set to "None", the dnsConfig field has to be specified.

Below are the properties a user can specify in the dnsConfig field:

• nameservers: a list of IP addresses that will be used as DNS servers for the Pod. There can be at most 3 IP addresses specified. When the Pod's dnsPolicy is set to "None", the list must contain at least one IP address, otherwise this property is optional. The servers listed will be combined to the base nameservers generated from the specified DNS policy with duplicate addresses removed.

• searches: a list of DNS search domains for hostname lookup in the Pod. This property is optional. When specified, the provided list will be merged into the base search domain names generated from the chosen DNS policy. Duplicate domain names are removed. Kubernetes allows for at most 6 search domains.

• options: an optional list of objects where each object may have a name property (required) and a value property (optional). The contents in this property will be merged to the options generated from the specified DNS policy. Duplicate entries are removed.

Network Policies:

If you want to control traffic flow at the IP address or port level (OSI layer 3 or 4), then you might consider using Kubernetes NetworkPolicies for particular applications in your cluster. NetworkPolicies are an application-centric construct which allow you to specify how a pod is allowed to communicate with various network "entities" (we use the word "entity" here to avoid overloading the more common terms such as "endpoints" and "services", which have specific Kubernetes connotations) over the network.

The entities that a Pod can communicate with are identified through a combination of the following 3 identifiers:

1. Other pods that are allowed (exception: a pod cannot block access to itself)

2. Namespaces that are allowed

3. IP blocks (exception: traffic to and from the node where a Pod is running is always allowed, regardless of the IP address of the Pod or the node)

When defining a pod- or namespace- based NetworkPolicy, you use a selector to specify what traffic is allowed to and from the Pod(s) that match the selector.

Meanwhile, when IP based NetworkPolicies are created, we define policies based on IP blocks (CIDR ranges).

These topics are being explained in more detail in the linked documentations. You can also find some examples that will help you implement it in your use case.

The reason why it was failing was that I didn't pull a base image to use it for my source code. So I pulled centos7 base image - podman pull centos/python-36-centos7 and then I tried to build again and it worked - s2i build . centos/python-36-centos7 test-image-app

What happened is that when you

Add below in the application.yml

Colab runs on a cloud virtual machine, and has no access to your local filesystem (i.e. paths such as c:\users\downloads\). To access files from Python scripts running in Colaboratory, you will first have to upload those files to the Colab VM.

This notebook outlines how to upload files from various sources: https://colab.research.google.com/notebooks/io.ipynb

I found the problem. The image stream tag was wrong.

Here the correct oc command:

no layer for batch yet, you must use the default config.