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Questions tagged [kube-dns]

209 questions
7
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1 answer

Kubernetes pod resolve external kafka hostname in coredns not as hostaliases inside pod

I am having spring boot app where in application.property we are specifying below properties. kafka is installed on remote machine with self-signed certificate (outside the kubernete…
user1184777
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7
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3 answers

Kubernetes - How to edit CoreDNS corefile configmap?

I have a pretty standard installation of Kubernetes running as a single-node cluster on Ubuntu. I am trying to configure CoreDNS to resolve all internal services within my Kubernetes cluster and SOME external domain names. So far, I have just been…
A. Davidson
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7
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2 answers

Unable to enter a kubernetes pod. Error from server: error dialing backend: dial tcp: lookup (node hostname) on 168.63.129.16:53: no such host

We have deployed a K8S cluster using ACS engine in an Azure public cloud. We are able to create deployments and services but when we enter a pod using "kubectl exec -ti (pod name) (command)" we are receiving the below error, Error from server:…
Leo Lazarus
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7
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1 answer

Instructions to install addons with Kubernetes 1.6 on bare metal machine?

I have setup my kubernetes cluster from scratch following this doc: https://kubernetes.io/docs/getting-started-guides/scratch/ My kubernetes master and worker are working correctly, but I didn't find the instruction to deploy dns addons.
Xi Long Zheng
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6
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4 answers

core_dns stuck in ContainerCreating status

I am trying to setup a basic k8s cluster After doing a kubeadm init --pod-network-cidr=10.244.0.0/16, the coredns pods are stuck in ContainerCreating status NAME READY STATUS RESTARTS …
Harish Gupta
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6
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1 answer

Kubernetes DNS lookup issue and "invalid" in the /etc/resolv.conf file

I have deployed a Kubernetes cluster composed of a master and two workers using kubeadm and the Flannel network driver (So I passed the --pod-network-cidr=10.244.0.0/16 flag to kubeadm init). Those nodes are communicating together using a VPN so…
ZedTuX
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6
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1 answer

How to fix error 'Operation [get] for kind [pod] with name [spark-wordcount-driver] in namespace [non-default-namespace] failed

I am trying to run a simple wordcount application in Spark on Kubernetes. I am getting following issue. Caused by: io.fabric8.kubernetes.client.KubernetesClientException: Operation: [get] for kind: [Pod] with name:…
hp2326
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6
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2 answers

Kubernetes service discovery doesn't resolve service host on minikube

I'm trying to run two services with k8s running on minikube installation. So I have the sevice Foo and Bar, so when I'm accessing the service Foo it must trigger service Bar to get the data. Here is the deployment configuration for Foo…
Sergii Bishyr
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6
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3 answers

Multi-broker Kafka on Kubernetes how to set KAFKA_ADVERTISED_HOST_NAME

My current Kafka deployment file with 3 Kafka brokers looks like this: apiVersion: apps/v1beta1 kind: StatefulSet metadata: name: kafka spec: selector: matchLabels: app: kafka serviceName: kafka-headless replicas: 3 …
Dcompoze
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6
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1 answer

Zookeeper: Hostname resolution fails

I am running Zookeeper in an OpenShift/Kubernetes environment. I have setup zookeeper as a StatefulSet in order to reliably persist config data. I configured three servers in my zoo.cfg by hostname, but on startup, hostname resolution fails. I…
Franz Wimmer
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5
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3 answers

Kubernetes: ERR_NAME_NOT_RESOLVED

I have deployed a mongo db, Spring Boot BE, Angular app within GKE. My FE service is a load balancer, it needs to connect with my BE to get data but I'm getting an console error in my browser: GET http://contactbe.default.svc.cluster.local/contacts…
user3380193
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5
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4 answers

kubedns can not start with "Failed to list *v1.Endpoints: Unauthorized" and "Failed to list *v1.Service: Unauthorized"

I have a problem when I install the kube-dns add on. My OS is CentOS Linux release 7.0.1406 (Core) Kernel:Linux master 3.10.0-693.el7.x86_64 #1 SMP Tue Aug 22 21:09:27 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux My api-server config: ### # kubernetes…
frank
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5
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2 answers

How does DNS resolution work on Kubernetes with multiple networks?

I have a 4 node Kubernetes cluster, 1 x controller and 3 x workers. The following shows how they are configured with the versions. NAME STATUS ROLES AGE VERSION INTERNAL-IP EXTERNAL-IP OS-IMAGE …
Russell Seymour
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5
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1 answer

Scheduling kube-dns on dedicated node pool

I have a cluster running on GCP that currently consists entirely of preemtible nodes. We're experiencing issues where kube-dns becomes unavailable (presumably because a node has been preempted). We'd like to improve the resilience of DNS by moving…
Faun
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5
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2 answers

kube-dns error: reply from unexpected source

I have a strange error with kube-dns. Environment: Cluster with a single master and a few nodes deployed on AWS with kops. Kubernetes version 1.8.4. Problem is that I have flakiness in DNS name resolution (both cluster-internal or external names) in…
whites11
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