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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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Setting custom tags on dynamically provisioned Volumes
2 min read
Since the version 1.6.0 of the EBS CSI driver it is now possible to define a set of custom tags to add the the volumes.
06/07/2022
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external DNS: Ignore Ingress object
1 min read
If we are using external DNS to create DNS records based on the configured Ingress objects we might face a situation where we have two Ingress objects with the same hosts configured:
$ kubectl get ingress NAME CLASS HOSTS ADDRESS PORTS AGE repo-nginx <none> repo.pet2cattle.com 10.12.10.21 80 194d repo-alb <none> repo.pet2cattle.com 10.12.10.31 80, 443 115dIn a situation like this, we want to be able to tell external DNS to ignore one of them.
05/07/2022
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