Story Tag: openshift-4

Stories Tag: openshift-4

Recovering a bare-metal master on OpenShift 4 | by Brandon Palm | Sep, 2021 | Medium

admin 1 month ago in

The official Red Hat documentation seems to not cover this specific use case for bare-metal hosts so I figured I would write an article covering this situation. At the time of this writing, the version of OpenShift I’m specifically looking at is 4.8.x. The documentation seems to cover specific scenarios such as backing up and restoring an ETCD member and of course the initial deploy…

OpenShift 3.x vs 4.x and Migration from 3.x to 4.x | by Kamlesh Prajapati | Sep, 2021 | Medium

admin 2 months ago in

One of the biggest differences between OpenShift 3 and 4 is how OpenShift 4 clusters operate using immutable and completely automated infrastructure enabled by RHEL CoreOS based operating system and automation. In 4.x everything is done by operators and your masters are different images then what you know in 3.x, More so there are no infra node by deployment , you need to tag and…

OpenShift 4 with Metal-LB Layer2 for Service Public IP | by Oren Oichman | Aug, 2021 | Medium

admin 2 months ago in

Working with OpenShift/Kubernetes is an enterprise environment can present interesting challenges, one of them is make sure that none HTTP services are available outside of the OpenShift/Kubernetes Cluster SDN (Software defined Network).for HTTP/HTTPS services we can use route/ingress to expose them outside of our cluster but for TCP services we need different approach … The different approach is actually more then one.The first option is…

Bash scripting in an OpenShift Environment | by Oren Oichman | Aug, 2021 | Medium

admin 2 months ago in

In the PAAS Admin world there are (roughly) 2 types of admins . One type (like me) are Linux Dinosaurs which have adopted and learn a lot on the Kubernetes’s ins and outs while retaining their long Linux experience. the other type are briete new admins with a fresh per of eyes and knowledge hungry approach.In this tutorial I will address the first type and…

KubeVirt VMs on OpenShift Code Ready Containers (Part 1 of 2) | by Roney Samuel Varghese | May, 2021 |...

admin 5 months ago in

It all started with a phrase from a popular Sitcom “ Challenge Accepted” What is KubeVirt and why the drive to unify infrastructure provisioning? Today most companies have internal virtualization environments running on hypervisors backed by VMWare either using ESXi or a type 2 hypervisor. Developers and Internal customers have to shift between data centers, software, technology stack to deploy their applications with a choice…

รีวิว Flux บน OpenShift 4.7. พอดีได้มา maintain ตัว Flux Operator… | by Chanwit Kaewkasi | May, 2021 | Medium

admin 6 months ago in

พอดีได้มา maintain ตัว Flux Operator สำหรับ OpenShift ให้กับทีม Flux ของ Weaveworks เลยจะขอรีวิว Flux บน OpenShift 4.7 ซักหน่อย เพราะมีเรื่องใหม่ ๆ หลายเรื่องที่เพิ่งจะได้เรียนรู้ Operator ที่ติดตั้งบน OpenShift ได้จะต้องเป็นตัวที่พัฒนาด้วย Operator SDK โดย Operator ที่สร้างด้วย Kubebuilder ก็จะ compatible กันด้วยในระดับนึง (จริง ๆ แล้วอยากเล่าตั้งแต่เริ่มเลยว่า Kubernetes Operator คืออะไร แต่เนื้อหาคงจะมากเกินไปเลยขออนุญาตแปะเป็น link) ตัว Flux Operator สร้างด้วย Kubebuilder เลยต้องการ YAML มาประกาศเพิ่มเพื่อให้กลายเป็น Operator ที่ติดตั้งบน OpenShift ได้ ก็เลยมีการทำโครงการ Flux2-OpenShift ขึ้นมาห่อตัว Flux Operator เดิมแล้วก็ส่งขึ้น Community Operators ที่ วิศวกรของ Red Hat…

Openshift yaml : Error: found character that cannot start any token – Sathish Kumar – Medium

admin 6 months ago in

Yesterday, it was a worst day as I had spent my complete day for silly issue with my openshift.yaml file. PROBLEM: During the deployment of my app in openshift, I used to get the error ‘found character that cannot start any token’ I just added one additional environment variable like others it has set before. Looking at the openshift.yaml file, it looks better and didn’t…

OpenShift Architecture. OpenShift is a layered system designed… | by Darshana Wickramasinghe | Apr, 2021 | Medium

admin 6 months ago in

OpenShift is a layered system designed to expose underlying Docker-formatted container image and Kubernetes concepts as accurately as possible, with a focus on easy composition of applications by a developer. Red Hat OpenShift Container Platform unites developers and IT operations on a single platform to build, deploy, and manage applications consistently across hybrid cloud and multi-cloud infrastructures. OpenShift Container Platform — platform as a service…

OpenShift: A new era Kubenetes. OpenShift has taken the Ideology of… | by Nishant Singh | Mar, 2021 | Medium

admin 8 months ago in

OpenShift has taken the Ideology of DevOps to a next level. Seriously RedHat had done a great Job 👏 .By taking view of pipelines from Jenkins , Utilizing the resources to its fullest by considering containerization technology, Providing a very user friendly Graphical User interface just tell me who don’t want that . The idea was taken forth by taking Kubernetes into consideration and seeing…