Microk8s 1.19 not working on Ubuntu 20.04.1

My environment:

• Ubuntu 20.04.1 x64

• Microk8s 1.19

The steps:

sudo snap install microk8s --classic

sudo usermod -a -G microk8s $USER

sudo chown -f -R $USER ~/.kube

su - $USER

microk8s config view > $HOME/.kube/config

And check ready

microk8s kubectl get pods -A -w

I waiting forever.

NAMESPACE     NAME                                      READY   STATUS              RESTARTS   AGE
kube-system   calico-kube-controllers-847c8c99d-qghww   0/1     ContainerCreating   0          3m56s
kube-system   calico-node-7xnt4                                          0/1     CrashLoopBackOff    4          3m56s
kube-system   calico-node-7xnt4                                          0/1     Error               5          4m53s
kube-system   calico-node-7xnt4                                          0/1     CrashLoopBackOff    5          4m59s
kube-system   calico-node-7xnt4                                          0/1     Error               6          7m46s
kube-system   calico-node-7xnt4                                          0/1     CrashLoopBackOff    6          7m49s
kube-system   calico-node-7xnt4                                          0/1     Error               7          12m
kube-system   calico-node-7xnt4                                          0/1     CrashLoopBackOff    7          13m

The attachment file

inspection-report-20200911_200456.tar.gz

[ktsakalozos]

This might be related to [1]. Calico will not consider your wlo1 interface (the only interface with IPv4) because it contains “lo” in its name. Here is what you could try. Edit /var/snap/microk8s/current/args/cni-network/cni.yaml and instead of:

            - name: IP_AUTODETECTION_METHOD
              value: "first-found"

enter:

            - name: IP_AUTODETECTION_METHOD
              value: "interface=wlo.*"

Then reapply the CNI manifest with microk8s kubectl apply -f /var/snap/microk8s/current/args/cni-network/cni.yaml

[1] https://github.com/projectcalico/calico/issues/3094 [2] https://docs.projectcalico.org/reference/node/configuration#ip-autodetection-methods

[ktsakalozos]

Is this a problem that belongs to Calico?

This is an issue we would like to be solved on Calico side however since we apply the calico CNI by default it affects MicroK8s too.

We could submit a patch to calico and we could also try to detect such cases in MicroK8s and try to hint the interface to use.