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Questions tagged [kubernetes]

Kubernetes is an open source orchestration system for Docker containers. It handles scheduling onto nodes in a compute cluster and actively manages workloads to ensure that their state matches the users declared intentions. Using the concepts of "labels" and "pods", it groups the containers which make up an application into logical units for easy management and discovery.

Kubernetes is an open source orchestration system for Docker containers. It handles scheduling onto nodes in a compute cluster and actively manages workloads to ensure that their state matches the users declared intentions. Using the concepts of "labels" and "pods", it groups the containers which make up an application into logical units for easy management and discovery.

For more details, visit the official Kubernetes page.

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When starting minikube set to --kubernetes-version v1.7.6, startup fails due to kubeadm attempting to use kube-dns

On my mac and Linux boxes (Linux Mint 18.3 Sylvia), when attempting to start minikube compatible with v.1.7.6, the startup fails when it tries to run the /usr/bin/kubeadm alpha phase addon kube-dns command. The problem is that kube-dns does not…
Scott S
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kubernetes - version issues when adding new node to existing cluster

I have a pre-existing k8 cluster that I want to add a node to. It appears that there's a version issue and Im not sure how to resolve it. When I attempt to join the new node (using kubeadm join): ... [kubelet] Downloading configuration for the…
ethrbunny
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Kubernetes don't start after change in kube-apiserver --authentication-mode=token

Installation: ubuntu server 16.04, EC2 instance that I install kubeadm. I try to connect to the Web UI, and change this parameter to --authorization-mode=token I restart the server and change to the default variable…
pioupiou
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Node-to-Node communication doesn't work with Kubernetes with Calico

I'm quite new to Kubernetes, event if it doesn't feel like after I spent dozens of hours trying to setup a working Kubernetes. The edge parameters: 1 master and 3 nodes set up using kubeadm kubernetes version 1.12.1, Calico 3.2 Primary IP addresses…
Daniel Alder
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In Kubernetes, how can a container created from a CronJob find out when it was scheduled?

We have a Kubernetes CronJob resource that runs a Job every minute. I need the container that results from the Job to know when it was scheduled to run. Is this possible? Background info just in case it's useful The hierarchy of Kubernetes…
Tom
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Is creating firewall rule for nodeport a security concen?

This question is regarding firewall rule on GCP. I run my development and production server on the same cluster and separating them by namespace only. For development, I expose a nodeport (e.g. 8000) and create a GCP firewall rule to access the…
gke
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Migrating from Kubernetes deployment to Helm

We have recently moved from a pure kubernetes deployment to a helm chart deployment for one of our apps. I'm trying to find a way to migrate a cluster that is currently running the old deployment to use the new helm chart. I'm having an issue…
rvabdn
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Kubernetes in production. Problems with a working pod

I have a question with kubernetes when deploying a new version. My yaml configuration of Kubernetes has the RollingUpdate strategy. The problem comes when it comes to changing versions this way. If I have a php-fpm that is performing an action, does…
Sermanes
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Manually completing certificate chain for server

I have a certificate, signed by Active Domain Certificate Services. The certificate itself looks fine, I successfully converted it from DER to PEM. However, it says X509v3 CRL Distribution Points: Full Name: URI:ldap:///**** Authority…
Jan Hudec
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pv and pvc - kube- efs

I am using PV with EFS. I have created a PV and PVC. My PV goes back to released status after I delete my StatefulSets. When I delete and re-apply my StatefulSets, it does not get attached to the same PV, instead the PVC status shows pending. My…
sumanth
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keeping terraform state file in S3\\bucket when deploying kube using kops / terraform

I am deploying a kube cluster using kops/terraform. My Kube's state store in in S3. However I also want to save my the terraform state file to be in S3:\bucket\something.tf instead of a local filesystem from where I deploy the kube.
sumanth
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minikube - Error starting cluster: kubeadm init error

My environment: $ cat /etc/redhat-release CentOS Linux release 7.5.1804 (Core) $ uname -a Linux X.X.X 3.10.0-862.11.6.el7.x86_64 #1 SMP Tue Aug 14 21:49:04 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux $ I followed Installation (Linux) and then tried…
alexus
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"The requested address is not valid in its context" when running kubeproxy usermode in Windows

I'm trying to connect a Windows node to a Kubernetes cluster, but when running the kube-proxy in usermode I keep getting the error The requested address is not valid in its context. How can I fix this?
Phyxx
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GlusterFS memory leak

I am using glusterfs on Kubernetes for about 7GB of storage. I have 4 nodes, two of which are holding the replica sets. One of the nodes has a constant memory leak. Starts out at about 100MB then slowly increases. After 2 days it is 700MB. …
Chris
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Kubernetes, partitioning around clusters and namespaces

Let's say we have 2 subsystems: A & B. And we have 2 env: QA & Prod. What would be a better way to organize it around cluster & namespace?. Is it: One cluster for subsystem A, another cluster for subsystem B. And within each cluster, we partition…
Cokorda Raka
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