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Questions tagged [kubeadm]

117 questions
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kubeadm has a empty token list

I'm running a k8s cluster to study and when I run kubeadm token list on the master node doesn't do anything, just jump to another line. And there is no file /etc/kubernetes/pki/tokens.csv on the master node. root@k8s-master:~# kubeadm token list…
rodolpho
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kubeadm based kubelet 1.24.2 calico CNI issues

I have installed a kubeadm based kubernetes cluster (v1.24.2) on Centos7. I have attempted to install calico CNI as per the instructions at "https://projectcalico.docs.tigera.io/getting-started/kubernetes/quickstart". The "/etc/cni/net.d/" and…
Allan K
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Kubeadm won't pull images (unable to determine version and cri-dockerd not found)

I did fresh install for several Ubuntu 22.04 servers with the latest (1.24.3) kubeadm, kubelet, and kubectl installed. I am also using containerd as the CRI. The error happens when I was trying to initiate the K8s cluster by running the preflight: #…
NeilWang
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How to create a container-disk image for VMs provisioned using KubeVirt

I am trying to create a VM setup in my Kubernetes cluster using KubeVirt. I have two EC2 instances(Master node: t2.xlarge and worker node: m5.metal) in AWS cloud and I have setup the cluster using KubeAdm. The CNI used is Flannel. I had setup…
arjunbnair
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"kubeadm-config" in the kube-system namespace used for getting configuration information was not found

I have a Kubernetes cluster created by Kubeadm. My current version of the cluster is v1.19.2 and trying to upgrade to v1.20.15-0 Now I am trying to upgrade the kubeadm cluster via kubeadm upgrade plan but I got below error : [upgrade/config] FATAL:…
Muhaimin Aiman
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How to add custom SSL certificates to cluster Kubernetes

I have a Kubernetes cluster with 2 master and 3 worker nodes also I have a separate Haproxy server with public IP. By default, kubeadm generates all the certificates required for the cluster and stores the certificates in /etc/kubernetes/pki As per…
AkilaMK
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kubeadm token create fails on self signed ca cert

I am trying to deploy a k8s cluster using kubespray on top of an openstack cluster of ubuntu servers. The install fails when kubeadm tries to init the cloud provider by submitting a post request to the keystone endpoint xxx:5000/v3/ to create the…
Ted
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VMWare Workstation and Windows 10: can't connect to a server hosted on VM

I have a private 2 nodes Kubernetes cluster configured on VMWare Workstation 15. I'm using MetalLB and Calico. Ingress service and ingress look like: xxx@c1-cp1:~/Desktop$ kubectl get svc -n ingress-controller-2 NAME …
Oana
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How can I modify CoreDNS configmap before I bootstrap the cluster using kubeadm?

I need to build my on-prem Kubernetes cluster using kubeadm. Since my environment has no DNS, I have to modify a configmap of CoreDNS so that it doesn't contain a forwarding section. After deploying the cluster, I can edit the configmap using…
Daigo
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Offline installation of kubernetes fails when using containerd as a CRI

I had to build a bare-metal Kubernetes cluster with no Internet connection for some reason. As dockershim was deprecated, I decided to use containerd as a CRI, but the offline installation with kubeadm failed while executing kubeadm init due to…
Daigo
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Can't pull images from gcr.io using kubeadm

I cannot pull images from gcr.io using kubeadm. I do not understand the problem, as it seems to have correct internet access to get the latest version info correctly. This is running on a ubuntu 20.04 machine. Kubernetes has been installed with: …
user3142695
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Pods on two different nodes communicate very slow, any idea why?

I am learning k8s and I have 3 nodes k8s cluster. I have just recently deployed k8s with kubeadmin and so far it is working great. everything working perfectly but the only problem that I am facing is network throughput. my three nodes and replica…
Yousuf
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Kubeadm with containerd cannot use locally loaded images

I'm trying to build kubernetes with containerd in bare-metal server (RHEL8). There's no Internet connection so I manually downloaded needed images (e.g. k8s.gcr.io/kube-scheduler:v1.22.1) and loaded them using "ctr image import". The images seem to…
Daigo
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Deploy control plane without master node registration using kubeadm

I'd like to set up the Kubernetes cluster and hide the control plane components for all clients (some kind of a managed cluster). Kubeadm uses Kubelet and static pods to run this components which lead to registering Node and Pod resources into the…
Pavel Parshin
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Does CRI-O support live upgrade without restarting containers?

I have an on-prem kubeadm created Kubernetes cluster running on Ubuntu 18.04. I have installed cri-o as container runtime. Since, it is claimed by CRI-O that it supports zero downtime during live upgrades, as it doesn't restart the containers when…
Shresthi Garg
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