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Questions tagged [kubeadm]

117 questions
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Kubernetes Nginx Ingress with Cert Manager and letsencrypt does not allow wildcarts in domain names

I have a self-hosted Kubernetes cluster with an Nginx Ingress. Cert-manager is also running on the cluster, with which I try to get valid SSL certificates using Letsencrypt. It all works and I get a valid certificate for example.com, www.example.com…
Tamino Elgert
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Kuberentes kubelet-client-current.pem expired

I'm new in K8s and I'm facing a problem with certificate. 1.13 version is used. One of the worker nodes is in NotReady status. I check logs and it turned out that: Part of the existing bootstrap client certificate is expired Using bootstrap…
RedBluff
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Kubeadm init fails, kubelet fails to start

I'm trying to set up a Kubernetes cluster on a set of raspberry pi 4s, I'm running into a issue with kubelet failing when running the kubeadm init command I0205 12:29:52.930582 5348 local.go:65] [etcd] wrote Static Pod manifest for a local etcd…
Drfrink
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kubelet service is not running(fluctuating) in Kubernetes master node

I was trying to create a Kubernetes Cluster using kubeadm. I had spin up an Ubuntu 18.04 server, installed docker (made it sure that docker.service was running), installed kubeadm kubelet and kubectl. The following are the steps that I did: sudo…
arjunbnair
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Custom root cert for kubeconfig files

Running kubeadm init phase certs apiserver --config kubeadm.yaml Is it possible to have multiple/custom root certificate to be used for group of users/kubectl/config files? I am asking because, I would like to give access, on a per project basis -…
Chris G.
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How to remove kubernetes completely from Ubuntu node

We need to completely remove Kubernetes from Ubuntu 18.04 server. For that we tried kubeadm reset sudo apt-get purge kubeadm kubectl kubelet kubernetes-cni kube* It gives Package 'kubeadm' is not installed, so not removed Package 'kubectl' is…
Sachith Muhandiram
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Is there a major difference between either CPU, RAM or Storage capacity needs for the leader or contributor nodes in a production K8S cluster?

I have already allocated 3 VPS for an initial multiple timezone cluster. 12 single-core vCPUs ≈50 GB RAM ≈1TB SSD storage 1 EST,1 CST,& 1 PST Before I jump in however, I would like to know if there are there any major differences in resource usage…
Timothy W. Crane
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Kubernetes Load balancer on Azure via kubeadm

We have created a Kubernetes cluster ( 1 master, 2 workers VMs) using kubeadm on Azure. The master and worker VMs have private IPs only. We are bringing up an nginx pod of service type - Load balancer in the cluster. Post this we are able see a…
Dilip
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Kubernetes: kubeadm join fails in private network

I'm trying to set up a HA Kubernetes cluster on Hetzner Cloud following this guide. I've created 6 servers, 3 control plane hosts and 3 workers. When trying to use kubeadm to join the second server to the cluster I get the following errors: On…
mway-niels
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Choosing Public IP or VPC IP for creating Kubernetes cluster

I have 3 compute engines (VMs) from a cloud provider, and I can connect to them using my SSH key and their public IP. I want to run a Kubernetes cluster (1 master, 2 workers) using kubelet on these machines, and the question arises when I want to…
abexamir
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kubeadm tool fail to initialize cluster when --advertise ip address is DNS Entry instead of actual IP address

I'm initializing the cluster using kube-adm tool and its failing.The reason is when kube-api server comes up , it looks for configuration and in configuration we have set "--advertise-address" flag as DNS entry instead of actual IP. Cluster gets…
Jatinder Singh
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Unable to install a Pod network add-on due to refused connection to localhost:8080

I'm trying to create a kubernetes cluster (my first :D) using kubeadm under the control plane node - a VM Centos7-. Environment: kubeadm version : v1.21.1 Kubernetes version: v1.21.1 VM Centos 7 (2 CPU/2 G RAM/20G memory) VMWare workstation :…
Doudda
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How to renew a certificate in Kubernetes 1.12

Hi I am currently working on renewing my certificate on Kubernetes version 1.12. The certificate expires after a month. Before the certificate expires We need to renew the certificate and apply it to all systems to make the service work. Does anyone…
서학용
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How To Install Kubernetes Cluster on Multiple Subnet workers (Bare Metal)

My question is how to install kubernetes Cluster from the give below Requirement. 3 Master Nodes IP Range 10.90.10.0/24 Master1 :10.90.10.20 Master2: 10.90.10.21 Master3: 10.90.10.22 3 Worker Nodes IP Range Worker1: 192.168.30.20 -----> …
Rehan
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Kubernetes - Controller-manager and Scheduler is not listening on ports 10251-10252

I have installed kubernetes using kubeadm tool and has version 1.20.0 but it seems that the controller-manager and scheduler is not listening on 10251 and 10252 ports. due to this prometheus is unable to etch the metrics from both of them. I tried…
Vipin Jain
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