Container runtime network not ready: cni config uninitialized

cnikubeadmkubernetes

I'm installing kubernetes(kubeadm) on centos VM running inside Virtualbox, so with yum I installed kubeadm, kubelet and docker.

Now while trying to setup cluster with kubeadm init --pod-network-cidr=192.168.56.0/24 --apiserver-advertise-address=192.168.56.33/32 i run into the following error :

Unable to update cni config: No networks found in /etc/cni/net.d

Container runtime network not ready: NetworkReady=false reason:NetworkPluginNotReady message:docker: network plugin is not ready: cni config uninitialized

So I checked, no cni folder in /etc even that kubernetes-cni-0.6.0-0.x86_64 is installed. I Tried commenting KUBELET_NETWORK_ARGS in /etc/systemd/system/kubelet.service.d/10-kubeadm.conf but it didn't work.

PS:

I'm installing behind proxy.
I have multiple network adapters:
- NAT : 10.0.2.15/24 for Internet
- Host Only : 192.168.56.33/32
- And docker interface : 172.17.0.1/16

Docker version: 17.12.1-ce
kubectl version : Major:"1",
Minor:"9", GitVersion:"v1.9.3"
Centos 7

Best Answer

Add pod network add-on

kubectl apply -f https://raw.githubusercontent.com/coreos/flannel/2140ac876ef134e0ed5af15c65e414cf26827915/Documentation/kube-flannel.yml

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Android – Transfer existing Android app to another developer account

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How to fix Flannel CNI plugin. Error: [plugin flannel does not support config version “”]

The accepted solution is incomplete and will cause headache down the line.

The proper solution to make this change permanent is to edit the ConfigMap created by flannel in your Kubernetes cluster. Otherwise, the file will be recreated the next time the flannel pod volumes are populated with the ConfigMap (e.g. on node reboot).

Use kubectl edit cm -n kube-system kube-flannel-cfg to edit the ConfigMap provided by flannel, and add the missing line:

  5 apiVersion: v1
  6 data:
  7   cni-conf.json: |
  8     {
  9       "name": "cbr0",
 10       "cniVersion": "0.2.0",
 11       "plugins": [

Reboot the node, or alternatively make the change manually in /etc/cni/net.d/10-flannel.conflist and do systemctl restart kubelet afterwards to skip the reboot.

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