Questions tagged [kubernetes]

For questions about Kubernetes, an open-source system for automating deployment, scaling, and management of containerized applications.

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How to diagnose intermittent “error dialing backend: dial timeout” error in GKE

We have an issue in our GKE cluster that started suddenly yesterday where intermittently we get errors interacting with the control plane. This affects our Jenkins builds which use the Kubernetes ...
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1answer
25 views

Scheduling a build using Kubernetes

The doc https://docs.openshift.com/container-platform/3.9/dev_guide/cron_jobs.html provides details of creating a cron job. To start a scheduled task that executes a build every 10 mins I use the ...
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How to get CPU and Memory usage of nodes in a specific Kubernetes instance group?

I have a couple separate instance groups, and kubectl top nodes will display the CPU and Memory usage of all nodes. I'd like to be able to just ask for the information for a specific instance group if ...
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1answer
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kubernetes nodeport service load balancing

Let's assume I have three node named n1, n2, n3. created four pods named p1, p2, p3, p4, k8s scheduler placed pods in nodes as follows n1 -> p1 n2 -> p2 n3 -> p3, p4 Now, to access these pods ...
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1answer
77 views

Gitlab CI/CD: deploy docker image to existing kubernetes cluster

I have node.js application that I need to deploy to exising kubernetes cluster. The cluster is setup using kops on AWS. I have created .gitlab-ci.yml file for building docker images. So, whenever a ...
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1answer
21 views

Enable TLSv1 TLSv1.1 for specific Ingress with Nginx Ingress

I try to enable TLSv1 and TLSv1.1 for one specific ingress on a AKS cluster. By default, only TLSv1.2 is enabled. I don't want to apply this configuration on my all cluster, just on a specific ...
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18 views

EKS dashboard without token

The requirement is to access my EKS dashboard without any token. I have setup the EKS dashboard and i am able to access it via a web browser now i am trying to access the dashboard without the token ...
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2answers
95 views

Easiest way to manage an elasticsearch cluster in GCP?

I'm trying to create my own Elasticsearch cluster to use for security analytics. I'm familiar with the function and setup of a single instance deployment, but I'm having trouble figuring out the ...
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Minikube for Ubuntu 20.04 WSL stuck on 'Restarting existing docker container for “minikube” …' after minikube start and 'StartHost failed' error

I've come across the following problem where my minikube cluster doesn't start and the command line becomes stagnant in the following way: $ minikube start �😄 minikube v1.17.1 on Ubuntu 20.04 �🆕 ...
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Can't reach AWS/EC2 + K3D + nginx + service

I'm having trouble accessing my K8S service... I'm running the service in K3D on an ec2 instance in AWS. I have deployed a simple HTTP rest API to this and I want to access it via a browser. I have a ...
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Jenkins and Kubernetes Design Involving GitHub

I am new to DevOps and am currently designing a CI/CD pipeline that involves integrating GitHub webhooks with Jenkins in a Kubernetes environment, and I would like to see whether this is feasible or ...
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Build image from inside a pod or container

It seems pretty easy to build image when I just mount the docker.sock in a container. It's same as what I do on hosts machine. Simply docker build . -t image/name:sometag. But when I need to do the ...
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1answer
41 views

Google K8s Mirror offline?

Heys dudes, More someone got error when trying update cache of the Google K8s repositories? I have been got the error about NO_PUBKEY Err:10 https://packages.cloud.google.com/apt kubernetes-xenial ...
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1answer
25 views

What are possible backup status in velero?

I am using velero for k8s cluster backup. I was looking for possible backup status in velero. I couldn't find any proper documentation on this. Can someone please help
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What are snap.microk8s.x processes?

Yesterday, we had a downtime because of CPU 100% usage. When I checked new relic, it showed a few processes starting with snap.microk8s. taking all CPU power. I'm not familiar with microk8s. But, ...
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1answer
85 views

How to use Hashicorp Vault with NodeJS application?

I have Node JS app inside pods, which needs to read vault secrets. So far I found 2 methods for doing that Using init container to mount secrets as .txt files and read/parse them in my app Using node-...
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Kubernetes workers outside the SDDC cloud not connect to the masters

Please help us with the following problem: We are using calico from https://docs.projectcalico.org/manifests/calico.yaml to setup Kubernetes network on SDDC cloud. The masters are inside the cloud, ...
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1answer
32 views

kubectl asking for username (k8s cluster created via kops)

I created a kubernetes cluster using kops and deployed it in AWS (not EKS manual cluster using kops). Then I export in my local machine the configuration like kops export kubecfg --state ${...
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1answer
40 views

Redirect to a custom page on 503 error in Ingress

When our site is getting deployed, the Ingress gets created and before I could get any response I get 503 for 5-6 minutes (time taken to startup). We need to configure our ingress to redirect to a ...
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7 views

Linkerd vs kube-proxy

I have a basic understanding of both kube-proxy and Linkerd, but what i dont understand is how they overlap. When i apply new deployment with fx a ReplicaSet + a ClusterIP service, kube-proxy ...
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2answers
81 views

Where may I need Docker Compose as Kubernetes won the container orchestration war?

I found Docker Compose just release 1.28 on 2021-1-20 but as Kubernetes won the container orchestration war I am not sure where and why I may still need Docker Compose, under with case Docker Compose ...
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1answer
15 views

Update volume size dynamically from inside a POD

I was wondering how I could dynamically create and then mount new volumes from inside a pod ? At runtime ! I have to download a lot of files with very different sizes and would like the storage to ...
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1answer
39 views

Ingress ip returns HTTP error DNS_PROBE_FINISHED_NXDOMAIN

I have the next ingress (output of "kubectl get ingress") NAME HOSTS ADDRESS PORTS AGE main * 192.168.39.190 80 46m But when I try to visit that IP address in ...
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11 views

GKE How to update Ingresses with different names via helm?

We have 3 clusters, dev, stg and prd in Google Kubernetes Engine. For some reason, the ingress resources are differently named between clusters. So for dev and stage it is called ingress-resource and ...
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16 views

istiod reports “pilot_conflict_inbound_listener”

Every so often we see push status messages from istiod that report a pilot_conflict_inbound_listener. The conflicts appear to be reported for pods with more than one ClusterIP service pointing at them....
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64 views

Modifying Microk8s System Manifests

To start, I am new to Kubernetes, so please feel free to point out and correct any terminology I get wrong. In a nutshell, I want to be able to run microk8s enable ingress with custom configuration ...
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1answer
26 views

Auto build and upload to AWS new docker image after commit in repo

I'm new at DevOps, and I looking for solution to my problem. I have a private code repository where I have a some Flask apps in one of many folders. Example of structure: - Project -- Django Apps --- ...
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1answer
24 views

Should the master node's hardware be the same as the worker node's hardware for a Kubernetes setup? [closed]

I'm new Kubernetes and am setting up a raspberry pi cluster at home and I want to put Kubernetes on it. I have 4 new raspberry pi 4s with 8gb each and one old raspberry pi 2+. There are several ...
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13 views

How to use new VPC CIDR range in a Fargate-only EKS cluster?

I created an EKS Fargate-only cluster using an existing VPC, and currently have objects running in it. I want to associate new CIDR ranges for my VPC by following How do I use multiple CIDR ranges ...
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4answers
67k views

What does “Does not have minimum availability” in k8s mean?

What does "Does not have minimum availability" mean? A GitHub discussion was found, but it is not clear to me what the error message means.
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11 views

Doing kubectl rollout undo causing current and previous replicasets persists

I am using kubectl for Kubernetes based deployments. I created a deployment that gone to crashloopbackoff state. Then for correcting this issue, a rolling update was done. But the deployment failed ...
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14 views

How to make sure K8S nodes only communicate via private network

I have the following setup: master and worker node are connected via eth0 to the internet and via enp7s0 to a local newtork (IP's 10.0.0.2 and 10.0.0.3). I have installed K8S with flannel as ...
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3 views

Grafana zabbix plugin is not shown in kubernetes service

I had created a custom docker image with zabbix plugin integrated to grafana. When I run docker run -p 3000:3000 myregistry:5000/grafana-zabbix, Grafana UI shows Zabbix plugin and I can enable and use ...
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Are Fedora's Silverblue and CoreOS projects viable for Team Stations and Dev/Production envs, respectively? (Instead of CentOS)

According to RHE's website, the project Atomic Host was deprecated on August 06, 2020. I am curious if anyone knows if they are actively contributing to Fedora's Silverblue project and/or CoreOS ...
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1answer
27 views

How to deploy loki-stack helm chart with CRIO?

I am trying to configure loki-stack using a helm chart to my k8s cluster. Since my k8s cluster uses CRIO and not docker (which is common nowdays) I need to change the pipeline_stages: config map to ...
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1answer
26 views

micrometer exposing actuator metrics vs kube-state-metrics vs metrics-server to set pod request/limits

micrometer exposing actuator metrics to set request/limit to pods in K8svs metrics-server vs kube-state-metrics -> K8s Mixin from kube-promethteus-stack Grafana dashboad It's really blurry and ...
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1answer
23 views

NetworkPolicy: Why are pod selectors used over “service selectors”?

My understanding of containers is that they should be considered to be short-lived. In addition, we can scale containers (and if using a container orchestrator like k8s, via pods) by creating ...
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1answer
21 views

How do I implement user authentication and management in Kubernetes?

I'm trying to architect a micro-service application, that runs in Kubernetes. It consists of several RESTful APIs. I want a central point to implement authentication for these APIs. In my product, ...
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1answer
110 views

Why is there insufficient memory on kubernetes node

I have an elasticsearch cluster in a kubernetes cluster. I have the data pods going to memory optimized nodes which are tainted so that only the elasticsearch data pods get scheduled to the. Right now ...
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1answer
22 views

What are the cost effective ways to deploy services using Kubernetes on multiple deployment environments?

We are converting a traditional docker-compose based service stack to a Kubernetes based services Before the conversion we had three deployment environments Local : Basically this is the developer's ...
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1answer
21 views

kubernetes quota vs limit. What are they? How are they different? When should I use one or the other?

I have been reading through the docs but it still is not clear as to why I should use one or the other. They have great examples of how to configure them but don't answer the why for quotes or limits ...
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10 views

I Want to deploy Consul and Registrator docker containers on Kubernetes

Locally on docker desktop it runs fine commands are. docker run -p 8400:8400 -p 8500:8500 -p 8600:53/udp -h node1 progrium/consul -server -bootstrap -ui-dir /ui 2.docker run -d --name=registrator --...
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1answer
16 views

How to consolidate multiple servers for CPU and Memory with Kubernetes

Setup: I have 10 Photovoltaics based setup where IOT Gateway get data from sensors, devices and send to Kubernetes Cluster. K8S cluster exposed its ActiveMQ broker with NodePort. Observation: AMQ has ...
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2answers
79 views

Can we do zero-downtime kubernetes deployment with a single pod?

I've inherited an app with K8s services with the following config spec: ... replicas: 1 strategy: rollingUpdate: maxSurge: 1 maxUnavailable: 1 type: RollingUpdate For most ...
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13 views

What is the best host solution for a medium starter aplication nowadays?

I'm am deploying an application that can be split into a dashboard with some control systems and an API. The system was developed to be an web interface for some scripts and bots used by a community ...
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1answer
58 views

Pattern(s) to scale node.js based ETL

I have a node.js ETL application that transforms data from 1..n locations and from each location there will be 0..m transactions. The application is started via cron on a configurable interval, ...
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1answer
61 views

Change docker container’s log PATH

Team: All my container logs are under /var/log/containers.. Where in kubelet or docker config can I specify this path such that logs are instead created under new path? Ex : /shared ? Instead of /var/...
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1answer
27 views

Jenkins and Kubernetes CLI plugin and GKE

I'm trying to use Jenkins Kubernetes CLI plugin from https://plugins.jenkins.io/kubernetes-cli/ to let deploy artifacts from Jenkins to GKE cluster. Expected Behavior Get cluster info on kubectl ...
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1answer
41 views

Cannot resolve services with service name inside a kubernetes pod

I cannot access a pod from another pod with its service name. Getting error as cannot resolve host svcname When i try to view the information of /etc/resolv.conf, i do see ec2.internal as searches ...
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1answer
62 views

Using helm to manage an “environment?”

I'm new to Kubernetes, and hence helm, so I've been reading a lot, and teaching myself by setting up a cluster, services, deployments, and pods. In my case I use AWS EKS. I now at least understand ...

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