Questions tagged [kubernetes-cni]
14 questions
1
vote
0 answers
Kubernetes Cluster on azure cloud with OS redhat 8.4 with kubeadm v1.30.8 - coredns and calico nodes are stuck in unknown state
We have migrated kubernetes VMs from AWS to Azure,and after the migration we are seeing calico and coredns pods are in unknow state.
Could someone please post your suggestions.
[root@master01 net.d]# kubectl get pods -n kube-system -o wide
NAME …
sharan kumar
- 11
1
vote
1 answer
Best cluster scope IPAM using bridge CNI?
What's the best cluster scope IPAM using bridge CNI? host local IPAM assign a block of address to each node, which is not ideal for managing cluster as a whole. Please include the network layout and CNI config in the answer.
William
- 211
1
vote
1 answer
debugging TCP ports number reused after FIN, ACK
I have an app running in a k3s cluster (flannel CNI). The app runs TCP+TLS requests in a loop and I've noticed that some of them are randomly timing out.
I've captured the traffic w/ tcpdump on the outgoing interface and I've noticed a pattern that…
Mike
- 152
1
vote
1 answer
Longhorn distributed block storage not working with Flannel CNI (Kubernetes)
I've been reading through The Book of Kubernetes by Alan Hohn and decided I would try to get the application described in the final chapter working with the Flannel CNI rather than Calico, which is what the application uses by default. The Longhorn…
Robert
- 63
0
votes
0 answers
calico/node is not ready: bird/confd is not live: exit status 1
After fresh kubespray install my worker node has calico pod in Init:CrashLoopBackOff state.
(We have deployed cluster this way before - a few months ago and all was good)
Error log from journalctl:
calico/node is not ready: bird/confd is not live:…
Quies
- 1
0
votes
0 answers
Why does egress to Ingress Controller IP not work, but label selector does in NetworkPolicy?
I'm facing a connectivity issue in my Kubernetes cluster involving NetworkPolicy. I have a frontend service (ssv-portal-service) trying to talk to a backend service (contract-voucher-service-service) via the ingress controller.
It works fine when I…
Jananath Banuka
- 201
0
votes
0 answers
Troubles creating metallb resources
I set up a cluster from 2 nodes using kubeadm.
CNI: flannel
I get these errors when trying to apply basic metallb resources:
Error from server (InternalError): error when creating "initk8s.yaml": Internal error occurred: failed calling webhook…
0
votes
0 answers
Inter-Pod Communication in a Kubernetes Cluster with Worker Nodes Located in Different Subnets
In my Kubernetes cluster, I have about 15 servers located across 4 different subnets:
Subnet 1: worker-node1-3 and ingress-node1-3
Subnet 2: worker-node4-6
Subnet 3: worker-node7-9
Subnet 4: master-node4-6
Kubernetes version 1.26.6.
Operating…
DHQ
- 1
0
votes
0 answers
PXE booting a KubeVirt VM
I have a use case to PXE boot a number of KubeVirt VMs. I'm looking for some guidance on how to set this up :)
From what I understand I need a separate network connected to the VMs. Set up on the k8s nodes, but outside of k8s. Network that…
Krystian Marek
- 101
0
votes
0 answers
pod networking across nodes not working - flannel
I went through the setup in the K8s documentation and chose flannel as the network plugin. I came up with the steps below on Ubuntu VMs. All the pods come up and I can deploy new pods but I can't communicate with pods when they're on different…
teoheras
- 1
0
votes
0 answers
Cannot ping other node's clusterIP within kubernetes cluster
I have setup a small microk8s cluster, for now only consisting of 2 machines (1 master, 1 worker).
I can successfully ping both machines on their internal IP, but any pod running on the other cluster cannot be contacted via the Cluster IP. Consider…
petwri
- 101
0
votes
0 answers
Pod-to-pod communication not working on differents workers nodes k8s
I've set up two Kubernetes cluster using kubeadm on both Azure and OpenStack, running on Ubuntu 24.04 with Kubernetes version 1.28. I'm using Calico as the CNI (Container Network Interface). However, I'm experiencing communication issues between my…
DarkJo
- 1
0
votes
0 answers
I am unable to ping Master IP from anywhere after installing Calico and MetalLB
I have a ongoing problem on Kubernetes.
I'm currently using:
Kubernetes (1.30.2) on Master and Worker nodes.
Calico (3.27.0)
Metallb (0.14.5)
I came across a problem where, if an unexpected course of events occur where one of my worker nodes…
0
votes
0 answers
Packet flow of kubernetes cilium CNI
I have a kubernete cluster with cilium replacing kube-proxy. The nat iptables looks like the following:
Chain PREROUTING (policy ACCEPT)
target prot opt source destination
CILIUM_PRE_nat all -- anywhere …
William
- 211