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Lab3.4 Calico doesn't work in worker node? Differents IP Ranges

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Posts: 2
in LFS258 Class Forum

Hello everyone.

I'm doing the lab3.4. I've installed in GCE a master node and in other Instance a controller node.
I use crio like a container engine.
When I create any pod in the Controller node the Endpoint IP range is 10.88.0.0, mean while the PODs created in master node have Endpoint with range 192.168.X.0 like it was definid by calico (I think)

  1. student@master:~$ kubectl get pod -o wide
  2. NAME                     READY   STATUS    RESTARTS   AGE    IP               NODE     NOMINATED NODE   READINESS GATES
  3. nginx-55d5bfd679-4pvqs   1/1     Running   0          4s     10.88.0.8        worker   <none>           <none>
  4. nginx-55d5bfd679-b7h9r   1/1     Running   0          3h8m   10.88.0.6        worker   <none>           <none>
  5. nginx-55d5bfd679-l5c4v   1/1     Running   0          3h8m   192.168.219.68   master   <none>           <none>

I don't hace access to 10.88.0.8 or 10.88.0.6, but I can access to 192.168.219.68

  1. student@worker:~$ telnet 192.168.219.68 80
  2. Trying 192.168.219.68...
  3. Connected to 192.168.219.68.
  4. Escape character is '^]'.
  1. student@master:~$ telnet 10.88.0.8 80
  2. Trying 10.88.0.8...
  1. student@master:~$ telnet 10.88.0.6 80
  2. Trying 10.88.0.6...

Should the PODs contained in the Controller node have the range 192.168.X.0 as well?

Thank sou much.
Regards.

Comments

  • Posts: 2,479

    Hi @diego.garcia.sison.next,

    User created Pods should be assigned IP addresses from the Pod IP block managed by Calico, regardless of the node where they get deployed.

    You can try to run kubectl describe pod <pod-name> against one of the pods with a 192.168.x.x IP address and against one of the pods with the 10.88.y.y IP address, and look at the annotations section, it my give you clues where the IP address is coming from.

    Regards,
    -Chris

  • Posts: 2

    Hello chrispokorni!!

    First of all, thank you for your help.
    Today, when I've powered on the GCE Instances, the Controller node's POD has the correct IP RANGEs. I supposed that the system reboot solved it. Could be?

    1. Name:         nginx-55d5bfd679-2rwcj
    2. Namespace:    default
    3. Priority:     0
    4. Node:         worker/10.2.0.5
    5. Start Time:   Tue, 24 Nov 2020 11:50:53 +0000
    6. Labels:       app=nginx
    7.               pod-template-hash=55d5bfd679
    8. Annotations:  cni.projectcalico.org/podIP: 192.168.171.69/32
    9.               cni.projectcalico.org/podIPs: 192.168.171.69/32
    10. Status:       Running
    11. IP:           192.168.171.69
    12. IPs:
    13.   IP:           192.168.171.69

    Have a nice day ;)

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