kubernetesgoogle-kubernetes-enginerke

Cant access pod of another Node

I install a 3 node Kubernetes Cluster with RKE tool. The installation was successful with no errors but I'm unable to ping from one pod to another pod.

If I ping a pod running on worker2 node(NODE-IP-10.222.22.47) I get a response, but no responses from pods running on worker1(NODE-IP-10.222.22.46). enter image description here

My Pods are as follows - enter image description here

Also I noticed for some pods it has given node-ip addresses. The node IP addresses are Master1=10.222.22.45

Worker1=10.222.22.46

Worker2=10.222.22.47 cluster_cidr: 10.42.0.0/16

service_cluster_ip_range: 10.43.0.0/16

cluster_dns_server: 10.43.0.10

Overlay network - canal

OS- CentOS Linux release 7.8.2003

Kubernetes - v1.20.8 installed with rke tool

Docker - 20.10.7

Sysctl entries in all nodes

firewall was disabled in all nodes before install.

Check - sysctl net.bridge.bridge-nf-call-ip6tables

net.bridge.bridge-nf-call-ip6tables = 1

Check - sysctl net.bridge.bridge-nf-call-iptables

net.bridge.bridge-nf-call-iptables = 1

Solution

  • The reason was the UDP ports were blocked