Server Fault Stack Exchange
Server Fault Stack Exchange

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.

2352 questions
11
votes
3 answers

How do I give a docker container its own routable IP on the original network?

Main question Imagine this scenario. A network of 192.168.0.0/24. A computer with hostname 'Docker-Host' is running a docker engine at 192.168.0.2 'Docker-Host' has sshd server running On 'Docker-Host' , I'm running a application in a container…
TrevorKS
  • 263
  • 1
  • 2
  • 7
11
votes
2 answers

Can host aliases be assigned to deployments in Kubernetes? If so, how?

This article describes how to assign host aliases to pods in kubernetes, is there anyway to do it for a deployment and not for a pod as such? Any other suggestions to add host entries in kubernetes to provide a first line of host name resolution…
Ulukai
  • 909
  • 2
  • 12
  • 29
11
votes
2 answers

Is there a regex function for kubernetes helm templates available?

I'm trying to implement an ingress helm template encoding the current application version into the url. This shall allow users to do soft migration by providing them different versions of the…
Oliver Probst
  • 133
  • 1
  • 1
  • 7
11
votes
4 answers

How do I check the max pod capacity of a Kubernetes node

I am busy setting up new k8s cluster. I am using rke with the --max-pods: 200 kubelet: # https://rancher.com/docs/rke/latest/en/config-options/services/services-extras/#extra-args extra_args: - max-pods: 200 #…
nelaaro
  • 644
  • 4
  • 10
  • 27
10
votes
1 answer

Can a Kubernetes pod span nodes?

The Docs say... A pod (as in a pod of whales or pea pod) is a group of one or more containers (such as Docker containers), the shared storage for those containers, and options about how to run the containers. Pods are always co-located and…
Bruno Bronosky
  • 4,529
  • 3
  • 26
  • 34
9
votes
1 answer

Amazon EKS: how to configure S3 access for worker nodes?

How can I configure an EKS cluster to automatically allow S3 access from worker nodes? I've set up an EKS cluster following the Getting Started guide and have run the example Guest Book app. Now I want to use Snakemake to run bioinformatics…
jackkamm
  • 251
  • 1
  • 2
  • 5
9
votes
1 answer

NGINX vs. GCE Kubernetes ingress classes

When setting up a Kubernetes ingress on Google Container Engine, you can choose the ingress class (gce or nginx). I realize that the GCE class provisions a load balancer on Google's Cloud Platform, which costs about $20/mo each. After some research,…
Wes Cossick
  • 333
  • 3
  • 12
9
votes
1 answer

Tailing logs with GCE and stackdriver

I have a running Kubernetes cluster that aggregates it's logfiles in stackdriver and would like to tail the aggregated logs on the command line. But so far I am only able to view the json stream float by in the web interface or fetch historic…
keyboardsamurai
  • 271
  • 2
  • 6
9
votes
1 answer

Detecting Kubernetes OOMKilled Events in GKE Logs

I'd like to set up instrumentation for OOMKilled events, which look like this when examining a pod: Name: pnovotnak-manhole-123456789-82l2h Namespace: test Node: test-cluster-cja8smaK-oQSR/10.x.x.x Start Time: Fri, 03 Feb 2017 14:34:57…
pnovotnak
  • 260
  • 4
  • 11
9
votes
4 answers

kube-proxy won't start in Minikube because of permission denied issue with /proc/sys/net/netfilter/nf_conntrack_max

After updating Arch Linux (sudo pacman -Syu) and restarting the system, Minikube fails to start because of kube-proxy. The logs show it was trying to modify /proc/sys/net/netfilter/nf_conntrack_max but it ran into a permission denied issue. I tried…
RedGiant
  • 211
  • 3
  • 16
9
votes
2 answers

Kubernetes pod /etc/resolv.conf has the wrong nameserver

I have a 4-node cluster setup at home that I am playing with, and ran into a problem when I started trying to do pod-to-pod communications. I used Kubespray to install the nodes (1 "server/controller" and 3 "nodes"). The issue is that I can't…
CodeChimp
  • 323
  • 1
  • 6
  • 16
8
votes
1 answer

Kubernetes deployment "failed to pull image" with local registry, minikube

I'm getting a "Failed to pull image" error on my deployment in minikube with a local registry, despite other deployments using the same image registry working as expected. My workflow is to build the image from a Dockerfile called docker.collection…
Ben
  • 251
  • 1
  • 3
  • 11
8
votes
3 answers

Kubernetes - how to map docker run command-line parameters to kubectl command line

I need to run this Docker command in Kubernetes: docker run -p 8080:8080 sagemath/sagemath sage -notebook I can map everything across except "-notebook" - does anyone know how to do that? Here is what I have so far, and of course it doesn't work…
A X
  • 469
  • 4
  • 10
  • 31
8
votes
1 answer

Static IP with "kubectl expose" on Google Container Engine stays in state forever

I am trying to expose a kubernetes "deployment" via the kubectl expose command, wih a static IP address, on Google Container Engine. With an ephemeral IP, everything works fine: kubectl expose deployment my-application \ --type="LoadBalancer"…
Adrian Smith
  • 276
  • 4
  • 10
8
votes
2 answers

Pod keeps restarting and is in a CrashLoopBackOff state

One of our pods won't start and is constantly restarting and is in a CrashLoopBackOff state: NAME READY STATUS RESTARTS …
Dexter J.
  • 93
  • 1
  • 1
  • 3
1 2
3
…
99 100