by Markus Breuer | Mar 14, 2021 | DevOps, Docker
The Windows Subsystem for Linux is the seamless integration of Linux into Windows. Use Windows natively and quickly issue a Linux command. Apply a Linux command to the Windows file system without having to start a virtual machine. As a result, Linux is always...
by Markus Breuer | Jan 8, 2021 | Docker
The POD fails to start, and referrers to the image layer not known. The “layer not known” issue may affect one or more cluster nodes. In effect, there is a corrupt docker image on the local disk cache. The layer not known problem still exists, even after a...
by Markus Breuer | Nov 28, 2020 | Docker
Where are the Docker daemon configuration files located? How to restart the Docker daemon after applying changes to the configuration? How to change and activate the Docker configuration? These are frequently asked questions. But changes to the Docker configuration...
by Markus Breuer | Aug 5, 2020 | Big Data
Regular Expressions are a powerful tool to split texts into fragments. Furthermore, Apache Spark is an analytics engine and capable of processing large amounts of data sets. The feature of naming capturing groups makes the usage of regular expressions more accessible....
by Markus Breuer | Jul 18, 2020 | Docker
Docker Content Trust feature enables your environment to run only with signed images. In this way, Docker Content Trust ensures that the docker pulls only signed containers from the docker registry. Once enabled, Docker Content Trust is active for all docker pull...
by Markus Breuer | Jul 12, 2020 | Docker
Docker uses default address pools to create subnets. For most use cases, the shipped defaults fit. But sometimes they cause conflicts with existing networks or subnets. Overlapping networks may conflict with existing systems. Or a large number of docker networks...
by Markus Breuer | May 18, 2020 | Docker
Docker uses default address pools to create subnets. For most use cases, the shipped docker subnet defaults fit. But sometimes the docker subnets cause conflicts with existing networks or subnets. Overlapping networks may conflict with existing systems. Or a large...
by Markus Breuer | Feb 29, 2020 | Docker
Docker software containerization reviewed Putting Software into containers seems to be state of the art. But what are the benefits? Are there any drawbacks? Most people have heard about docker technology. And not less have used docker. But we are looking towards more...
by Markus Breuer | Dec 15, 2019 | Big Data
Openshift offers many possibilities to embed files in pods. Furthermore, there are many reasons to include files in pods. So, embedding configuration files is a powerful mechanism. In this way, unchangeable containers become populated with dynamic content. In brief,...
by Markus Breuer | Nov 19, 2019 | Big Data
Openshift templates are Openshift’s answer to Kubernetes helm charts. In this way, an openshift template contains a list of objects. In consequence, applying an openshift template substitutes its placeholders. Also, it contains a parameter list. Openshift...
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