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OpenShift: unable to start CRC
3 min read
While trying to setup CRC (a OpenShift version of minikube) on your laptop, while trying to start crc it might fail starting with the following crypting message:
$ crc start requires memory in MiB >= 921623/08/2022
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Using ephemeral containers
3 min read
Starting Kubernetes 1.23, ephemeral containers are enabled by default (in beta though). Using ephemeral containers we can now troubleshoot pods by deploying a temporary container into it with extra privileges or binaries to use
22/08/2022
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How docker generates container's names
2 min read
Everytime you create a container using docker, if not already set using --name, docker chooses a name for you: you can expect two words with a underscore:
$ docker run --rm -d alpine sleep 24h 38c4cc4e87762fc113ef174e9a4989e13d21037678abd3fe73840b825f14c7bf $ docker ps CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES 38c4cc4e8776 alpine "sleep 24h" 5 seconds ago Up 3 seconds romantic_shternFor this example it was chosen romantic_shtern, but it can use a great variety of words:
$ docker ps --all | grep -v "Up" | awk '{ print $NF }' NAMES mystifying_poitras suspicious_shtern focused_chatelet keen_mendel happy_jackson xenodochial_margulis kind_blackburn gallant_pascal trusting_thompson (...)So, how does Docker generate names for it's containers?
01/08/2022
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Import files into objects using helm
2 min read
When writing helm charts being able to specify the files to use for ConfigMap or a Secret objects is way more convenient than having the object already rendered. Using .Files.Glob we can tell help to import a set of files into the object
08/07/2022
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Installing helm a k3s node: Kubernetes cluster unreachable
2 min read
Some times for convenience we might want to install helm on one of the k3s nodes. If we do so we'll get the following error:
# helm list Error: Kubernetes cluster unreachable: Get "http://localhost:8080/version": dial tcp 127.0.0.1:8080: connect: connection refused07/07/2022
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