katacoda | Katacoda scenarios for Kubernetes Patterns

I am doing a course in NLTK Python which has a hands-on problem(on Katacoda) on "Text Corpora" and it is not accepting my solution mentioned below. Have been stuck on this problem since long. Need to complete this hands-on to proceed foreword in course.

1. Import the text corpus brown.

2. Extract the list of tagged words from the corpus brown. Store the result in brown_tagged_words

3. Generate trigrams of brown_tagged_words and store the result in brown_tagged_trigrams.

4.For every trigram of brown_tagged_trigrams, determine the tags associated with each word. This results in a list of tuples, where each tuple contain pos tags of 3 consecutive words, occurring in text. Store the result in brown_trigram_pos_tags.

5.Determine the frequency distribution of brown_trigram_pos_tags and store the result in brown_trigram_pos_tags_freq. 6.Print the number of occurrences of trigram ('JJ','NN','IN')

I'm following some useful tutorials on how to set https certificates for Minikube ingresses.

The thing I've noted are:

• they always use ngrok paid service and tunneling to have a public domain to be certificated by Let's Encrypt;
• else Let's Encrypt is not used and, as a matter of example for a local Minikube distribution, a self signed certificate is used instead.

My question is: is there a way to use Let's Encrypt with a local Minikube in a non-paid version? For example using Katacoda or other free session tools?

I'm trying to install the katacoda client. I used NPM to install it:

When I am using the command kubectl with the --token flag and specify a token, it still uses the administrator credentials from the kubeconfig file.

This is what I did:

I have a headless CentOS 7 box to which I have ssh access. I have installed OpenShift v4.2 - the Code Ready Containers version successfully. I am able to use the oc tool, create projects, access exposed routes from services, etc.

I want to explore the visualization that comes from Istio - the service mesh. How do I access the web console remotely so that I can explore the service mesh?

Katacoda does not seem to have a OpenShift 4.2 cluster.

I have installed redis. The default given name to me is plinking-narwhal. Now I would like to install a service with my assigned name. But first I want to remove the existing one. I had tried deleting them without success.

I'm new to kubernetes and am still trying to extract log from a few lines and write it, if anyone can help me what commands i should execute.

If the pod is named bino, and i wanted to extract the lines corresponding to the error unable-to-access-website, and then write them to a certain location, say John/Doe/bino. How would i do this is there a easy command?

I tried using kubectl log bino, but it just dumps all the output on the terminal, if i wanted to write certain parts how can i do it? Thanks!

Or if anyone has played around in katacoda i would appreciate a link to a similar example.

In kubernetes network policy we can set Ingress value as blank array i.e. [] or we can also set value as - {}

What is the difference between using these 2 values?

First YAML that I tried - It didn't work

I am practicing katacoda k8s lesson with the knowledge from Stack Overflow. I had tried kill the pods by command line and the result of them are exactly the same with simple example. The pod will get recreated in several moment later after dead.

Question:
Can I just simply replace the ReplicationController with Deployment?