3.2 Node Not Ready

I have followed the steps in the PDF to add a node to the cluster but I get a status "NotReady" in the node.
Reason Message ------ ------- KubeletNotReady container runtime network not ready: NetworkReady=false reason:NetworkPluginNotReady message:Network plugin returns error: cni plugin not initialized
What can be the issue? I am using local VMs and the network communication between them works, as the node could be added in the cluster.
Answers
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Hi @ilmx,
There could be several reasons why the node remains in a NotReady state. What hypervisor are you using, what are the sizes (cpu, mem, disk) of the VMs, what guest OS is running the VMs (distribution, release), what type of network are VMs attached to, is all ingress traffic enabled at the hypervisor level?
Regards,
-Chris0 -
Is kubelet is running?
0 -
Hi,
I am using VMware Workstation. I have created a Host-Only network for them, and assigned IPs statically to each machine. No firewall in place. They can communicate with each other (ping, netcat, etc).
I have created one CP and two working nodes. The VMs are exactly the same:
2 CPU / 4 GB RAM / 500 GB disc Distributor ID: Ubuntu Description: Ubuntu 22.04 LTS Release: 22.04 Codename: jammy
The cilium pods in the CP run well, but the ones in the WN don't:
cilium-operator-788c7d7585-592lg 0/1 ContainerCreating 0 5h15m 10.10.10.4 wn2 cilium-operator-788c7d7585-hr5tk 0/1 ContainerCreating 0 5h15m 10.10.10.3 wn1 cilium-tk29d 0/1 Init:0/6 0 5h15m 10.10.10.3 wn1 cilium-vth84 0/1 Init:0/6 0 5h13m 10.10.10.4 wn2 cilium-zjqdb 1/1 Running 0 5h13m 10.10.10.2 cp coredns-5d78c9869d-lpnbq 1/1 Running 0 5h13m 192.168.0.214 cp coredns-5d78c9869d-n8xd2 1/1 Running 0 5h13m 192.168.0.246 cp etcd-cp 1/1 Running 0 2d23h 10.10.10.2 cp kube-apiserver-cp 1/1 Running 2 2d23h 10.10.10.2 cp kube-controller-manager-cp 1/1 Running 17 2d23h 10.10.10.2 cp kube-proxy-26bvd 1/1 Running 0 2d23h 10.10.10.2 cp kube-proxy-lzf86 0/1 ContainerCreating 0 43h 10.10.10.4 wn2 kube-proxy-r8pz6 0/1 ContainerCreating 0 5h13m 10.10.10.3 wn1 kube-scheduler-cp 1/1 Running 16 5h13m 10.10.10.2 cp
I tried to create a second node to start from scratch but the same issue happened.
I did a change in the YAML file provided (cilium-cni.yaml) because I realised there was a network cidr defined inside, so I changed it to 10.10.10.0/16 to match my network. Then I re-applied but nothing changed.
I am not sure how to investigate further.
0 -
@kishorevaishnav said:
Is kubelet is running?Yes, kubelet is running in every machine:
$ systemctl status kubelet ● kubelet.service - kubelet: The Kubernetes Node Agent Loaded: loaded (/lib/systemd/system/kubelet.service; enabled; vendor preset: enabled) Drop-In: /etc/systemd/system/kubelet.service.d └─10-kubeadm.conf Active: active (running) since Tue 2023-10-24 20:36:24 UTC; 2 days ago
0 -
Hi @ilmx,
Please use the OS release recommended by the lab guide - Ubuntu 20.04 LTS.
The CPU seems adequate per VM, memory could be increased to 8 GB per VM, and 20-50 GB disk space should suffice for the purpose of the lab exercises.
All VMs should have access to/from the internet, to/from each other. All ingress traffic to the VMs from all sources, to all ports and all protocols should be allowed. Please ensure the network type selected satisfies these requirements.
Defining a Cilium Pod network CIDR that is distinct from your existing VM network will help to understand the different networks that take part in the Kubernetes traffic management.Regards,
-Chris0 -
Thanks. I will try also with Ubuntu 20, but I would like to understand how to solve the problem. The network complies except for the Internet access (although I can hack into this to e.g. pull a Pod). But I believe the lack of Internet should not be an issue for my specific problem, should it?
Is there anything specific that I can do to research the issue
cni plugin not initialized
?0
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