OpenShift Morsels: oc rsh – exploring the pod
On Day #7 lets see how to explore the contents of the container. How does ssh work in the containerized world?
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OpenShift Morsels: rsync – getting files from and to a pod
On Day #6 lets step away for a moment from troubleshooting the pods and have a look at getting files from pods.
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OpenShift Morsels: troubleshooting with logs
On Day #5 a small entry about getting logs of a pod.
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OpenShift Morsels: troubleshooting with events
On Day #4 lets have a look at the events. They let you learn about changes taking place in your project in relation to OpenShift.
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OpenShift Morsels: labels vs annotations
Day #3 - When describing pods and other resources, you can see two sets of key value pairs. One is called Labels and the other Annotations.
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OpenShift Morsels: Troubleshooting pods with oc describe
Day #2 Still debugging your pod? Sometimes help comes from most unexpected place.
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OpenShift Morsels: Troubleshooting pods with oc debug
Day #1 lets talk about troubleshooting pods. Since several versions of OpenShift Client you can use a very simple and powerful command to check what is wrong with your application. (more…)
Learning Scala: Scala Koans
What works for me best when learning is to get a small project and start coding. Sometimes I like to start from a small existing project and play around it, change some things. It is good for me to learn grammar, see what already exists in the language libraries.
I like Scala Koans for its coverage of all topics and similarity to other language approaches - there are koans for other languages too! The setup is really straightforward and quickly you can start going through the language features. I would be very interested in hearing from people who never programmed if approach like Scala Koans gives enough introduction to programming.
For sure it is a good exercise for people who already programmed and would like to get familiar with a new syntax and concepts.
You can find Scala Ko...
Learning Scala: Coursera
I want to share several Scala resources that help learning it. You should find something for yourself independent of your programming background.
Today something about Coursera. This is my favourite "go to" learning resource since before it was created. I can recommend it to anyone and I did go through several courses. There is a high variety of course choices - not only in programming or STEM.
As for Scala, you can find the whole specialization Functional Programming in Scala Specialization. You can sign up to single courses, but I believe you can benefit from all of them and get certification.
I took the course "Functional Programming Principles in Scala" during one of the first installments. It was very popular and you will find many people in Scala community, who have taken it...
OpenShift: working with multiple accounts, projects and servers
I often find myself switching between projects or using a service account to test something. To work with multiple projects I usually create an alias per namespace to quickly execute commands.
[crayon-69e7637ba260a616670624/]
To use multiple accounts similar aliases can be created
[crayon-69e7637ba2615461989394/]
To work with other clusters, you will can add --server besides the token parameter.
[crayon-69e7637ba2619203455743/]
The more contexts, the more fun to manage and store them. Instead of doing it in shell files it might be easier to learn about [crayon-69e7637ba261c661048311-i/] file.
Kubernetes config file
It contains information used during [crayon-69e7637ba261f782450298-i/] . There are three main components: users, clusters and contexts. You can configure them individua...