Questions tagged [kubernetes]

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

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tls-origination: Invalid path istio when importing tls

I am intercepting a service at port 389 and applying tls-origination, so my destination rules is as follows: apiVersion: networking.istio.io/v1alpha3 kind: DestinationRule metadata: name: ldap spec: ...
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How to execute npm commands inside a Docker container on a Kubernetes pod from a Jenkins pipeline?

I am trying to run sh commands from a Jenkins pipeline inside a Docker container, which is located inside a Kubernetes pod. I am using the Kubernetes plugin and after some research and experimenting, ...
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How to properly set up a VPN connection inside a kubernetes pod?

Working on a script which involves querying a PostgreSQL db. This db is on a host which is behind an f5 VPN. I'm pretty new to the concept of VPNs, and particularly with f5's products. Ideally, I'd ...
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How do I install GitWeb onto k8s-Gerrit? (itself installed through Helm chart)

My team uses Gerrit for code review, and has it installed on Kubernetes via Helm chart. We want to be able to see our code changes, and so we wanted to integrate Gitweb with Gerrit. This begins with ...
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What is the relation between serverless and kubernetes

I have heard serverless so many times. People say it can automatically scale in response to users requests without developers maintaining infrastructure. But from a architecture point of view, what is ...
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Deletions gets stuck and updates not working

I have installed k8s on a linux VM using kubeadm and for some reason any deletion of components assigned to PersistenVolumes gets stuck. I am using both 'retain' and 'delete' reclaim policies. ...
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OpenShift - identify request to pod with the service that sent it

I have several services running on OpenShift that are interacting with each other. Right now one of the services is crushing as a result of too many requests, and I want to know which one of the ...
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How to ensure Nodes are killed when Job is finished using Cluster Autoscaler in Kubernates

I have large Kubernates jobs which take the whole resources of one node / droplet in Digitalocean (it's not running on AWS). Using resources in a deploy.yaml, the cluster autoscaler works to scale up, ...
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PromQl for % memory & cpu utilization at namespace level [closed]

promql for percentage of memory utilization and cpu utilization at namespace level on grafana. I want to create a dashboard on Grafana like in picture shown below at namespace level.
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+50

Stunnel in non-root mode

I have a setup on k8s that uses STUNNEL to secure all requests sent/received. In this setup Stunnel is running as root and - by default - it accesses root dirs. My aim is to re-setup stunnel to work ...
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503 Service Temporarily Unavailable using Kubernetes

I am having some issue with creating ingress for a nginx service that I deployed in a kubernetes cluster. I am able to open the web page using port forwarding, so I think the service should work.The ...
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How to get traefik ingress to load balance across several ClusterIP services

I want to be able to load balance several nodes of a backend service represented by ClusterIP services using a traefik.containo.us/v1alpha1 ingress. I know that ClusterIP service can load balance ...
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Best Kubernetes storage option

I know there are several options, I’ve heard everything from SSHFS, NFS, object storage all the way to storage OS, my issue is I need something fast and reliable to serve a media website built on ...
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Istio Keeps On Showing TcpProxyValidationError Errors

I initially created an EnvoyFilter to apply idle_timeout of 5s to outbound requests originating from workloads with label app: mecha-dev. apiVersion: networking.istio.io/v1alpha3 kind: EnvoyFilter ...
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How should I define a initContainer inside helm values.yaml?

noob question: So from digging the world wide web(https://github.com/prometheus/prometheus/issues/5976), I have discovered I can set permission issue by initContainers: - name: prometheus-data-...
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Where to install Prometheus for Kubernetes monitoring

I'm considering using Prometheus to monitor and analyze different metrics from my AWS EKS Kubernetes cluster running in Fargate, as it seems to be the standard tool during these times. However, ...
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topologySpreadConstraints - maxSkew behavior with only one Node?

I want to run my App on Kubernetes on two specific Nodes, and only ever have 2 pods running on each node. So, I set replicas to 4, used nodeAffinity to lock the pods to the two nodes and used ...
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when replicaset is 1 then what are 1/2 pods for prometheus server?

Using helm chart : helm install monitor prometheus-community/prometheus -n monitoring -f ./values.yaml I cannot get prometheus server to running. # kubectl get pods -owide -n monitoring NAME ...
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Use pod's IP from a different node than the pod is running

Can I access the pod using its ip address from a different node (not the one the pod is running)? I'm not talking about using Service resources, but using the pod ip (Pod.status.podIP).
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Running KVM virtual machines in specific working node in raspberry pi kubernetes cluster

I have three quistions . I've seen a lot of videos about creating and configuring raspberry pi kubernetes cluster but all of them was only using terminal to run console apps i'm not specialist . So is ...
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When do I run applications on a server in a pod and when to run them directly on the base operating system?

I am trying to get started in the DevOps Field by setting up a small server currently with Virtualbox, later on for a small team. For my basic setup I plan to use gitea as self-hosted git and Jenkins ...
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ArgoCD Autosync based off of Docker Image `latest` Tag

Using ArgoCD, I'd like to have the App AutoSync Update/Reploy when the docker image is updated on a specific tag such as latest or stable. For example, if I have a deployment in my git repo like this: ...
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How to Integrate Amazon API Gateway with EKS using Application Load Balancer (ALB)?

According to the AWS documentation, it is possible to integrate Amazon API Gateway with EKS using ALB. However, by far most of this documentation explains how to do this with NLB instead of ALB. So ...
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26 views

AWS ECS vs EKS for hybrid cloud strategy

What can EKS deployment do that ECS deployment can't do? is there any specific circumstances that you have to deploy your application on EKS but not ECS.
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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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28 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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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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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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33 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

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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27 views

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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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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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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73 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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101 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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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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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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35 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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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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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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25 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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15 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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16 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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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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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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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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116 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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49 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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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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