amitmvyas opened a new issue, #13006:
URL: https://github.com/apache/cloudstack/issues/13006

   Hi,
   
   I have downloaded Ubuntu 22.04 Image (CKS) from 
[here](https://download.cloudstack.org/testing/custom_templates/ubuntu/22.04/cks-ubuntu-2204-kvm.qcow2.bz2).
 When deploying the CKS cluster using this image I am seeing that Calico POD on 
Master and Worker node is failing because of /etc/hosts file don't have 
anything configured in it.
   
   ```
   amitvyas@LTQQ9JK7N3 .kube % kubectl get pods -A
   NAMESPACE              NAME                                               
READY   STATUS             RESTARTS          AGE
   kube-system            calico-kube-controllers-7bfdc5b57c-m747t           
1/1     Running            0                 25h
   kube-system            calico-node-6459c                                  
0/1     CrashLoopBackOff   21 (4m29s ago)    67m
   kube-system            calico-node-vxddg                                  
0/1     CrashLoopBackOff   435 (67s ago)     25h
   kube-system            calico-node-w9d2n                                  
0/1     CrashLoopBackOff   425 (30s ago)     25h
   kube-system            calico-node-z84dj                                  
0/1     CrashLoopBackOff   21 (4m44s ago)    67m
   kube-system            calico-node-zfm5x                                  
0/1     Running            434 (5m46s ago)   25h
   kube-system            cloud-controller-manager-6887fc69c8-jpcxw          
0/1     CrashLoopBackOff   13 (3m55s ago)    49m
   kube-system            cloudstack-csi-controller-85f5b85cdb-2hbdd         
7/7     Running            0                 25h
   kube-system            cloudstack-csi-controller-85f5b85cdb-m25cb         
7/7     Running            0                 25h
   kube-system            cloudstack-csi-node-759zr                          
3/3     Running            0                 25h
   kube-system            cloudstack-csi-node-94k6s                          
3/3     Running            0                 25h
   kube-system            cloudstack-csi-node-q75pb                          
3/3     Running            0                 25h
   kube-system            cloudstack-csi-node-r9kdg                          
3/3     Running            0                 25h
   kube-system            cloudstack-csi-node-s68hl                          
3/3     Running            0                 25h
   kube-system            coredns-674b8bbfcf-qsv5h                           
1/1     Running            0                 25h
   kube-system            coredns-674b8bbfcf-s75qm                           
1/1     Running            0                 25h
   kube-system            etcd-cl01-control-19d8025b62c                      
1/1     Running            0                 25h
   kube-system            etcd-cl01-control-19d802668f0                      
1/1     Running            0                 25h
   kube-system            etcd-cl01-control-19d80271aad                      
1/1     Running            0                 25h
   kube-system            kube-apiserver-cl01-control-19d8025b62c            
1/1     Running            0                 25h
   kube-system            kube-apiserver-cl01-control-19d802668f0            
1/1     Running            1 (25h ago)       25h
   kube-system            kube-apiserver-cl01-control-19d80271aad            
1/1     Running            1 (25h ago)       25h
   kube-system            kube-controller-manager-cl01-control-19d8025b62c   
1/1     Running            0                 25h
   kube-system            kube-controller-manager-cl01-control-19d802668f0   
1/1     Running            0                 25h
   kube-system            kube-controller-manager-cl01-control-19d80271aad   
1/1     Running            0                 25h
   kube-system            kube-proxy-296bl                                   
1/1     Running            0                 25h
   kube-system            kube-proxy-5rzds                                   
1/1     Running            0                 25h
   kube-system            kube-proxy-dqqsc                                   
1/1     Running            0                 25h
   
   kube-system            kube-proxy-j2mmj                                   
1/1     Running            0                 25h
   kube-system            kube-proxy-p74bg                                   
1/1     Running            0                 25h
   kube-system            kube-scheduler-cl01-control-19d8025b62c            
1/1     Running            0                 25h
   kube-system            kube-scheduler-cl01-control-19d802668f0            
1/1     Running            0                 25h
   kube-system            kube-scheduler-cl01-control-19d80271aad            
1/1     Running            0                 25h
   kubernetes-dashboard   dashboard-metrics-scraper-5bd45c9dd6-hg8cm         
1/1     Running            0                 25h
   kubernetes-dashboard   kubernetes-dashboard-687457b9bd-46fsb              
1/1     Running            1 (25h ago)       25h
   amitvyas@LTQQ9JK7N3 .kube % 
   
   ```
   
   
   
   ```
   amitvyas@LTQQ9JK7N3 .kube % kubectl logs calico-node-6459c -n kube-system 
   Defaulted container "calico-node" out of: calico-node, upgrade-ipam (init), 
install-cni (init), mount-bpffs (init)
   2026-04-13 07:27:18.441 [ERROR][90] felix/health.go 390: Health endpoint 
failed, trying to restart it... error=listen tcp: lookup localhost on 
8.8.8.8:53: no such host
   2026-04-13 07:27:18.990 [INFO][90] felix/int_dataplane.go 2201: Received 
*proto.HostMetadataV4V6Update update from calculation graph. 
msg=hostname:"cl01-node-19d80288ac0" ipv4_addr:"10.1.0.107/24" 
labels:{key:"beta.kubernetes.io/arch" value:"amd64"} 
labels:{key:"beta.kubernetes.io/os" value:"linux"} 
labels:{key:"kubernetes.io/arch" value:"amd64"} 
labels:{key:"kubernetes.io/hostname" value:"cl01-node-19d80288ac0"} 
labels:{key:"kubernetes.io/os" value:"linux"} 
labels:{key:"topology.csi.cloudstack.apache.org/zone" 
value:"48e11a80-49e5-4e2b-bf11-f21030cd8221"}
   2026-04-13 07:27:18.990 [INFO][90] felix/int_dataplane.go 2126: Dataplane 
updates no longer throttled
   2026-04-13 07:27:19.450 [ERROR][90] felix/health.go 390: Health endpoint 
failed, trying to restart it... error=listen tcp: lookup localhost on 
8.8.8.8:53: no such host
   2026-04-13 07:27:20.458 [ERROR][90] felix/health.go 390: Health endpoint 
failed, trying to restart it... error=listen tcp: lookup localhost on 
8.8.8.8:53: no such host
   2026-04-13 07:27:21.467 [ERROR][90] felix/health.go 390: Health endpoint 
failed, trying to restart it... error=listen tcp: lookup localhost on 
8.8.8.8:53: no such host
   2026-04-13 07:27:22.475 [ERROR][90] felix/health.go 390: Health endpoint 
failed, trying to restart it... error=listen tcp: lookup localhost on 
8.8.8.8:53: no such host
   2026-04-13 07:27:23.484 [ERROR][90] felix/health.go 390: Health endpoint 
failed, trying to restart it... error=listen tcp: lookup localhost on 
8.8.8.8:53: no such host
   2026-04-13 07:27:24.494 [ERROR][90] felix/health.go 390: Health endpoint 
failed, trying to restart it... error=listen tcp: lookup localhost on 
8.8.8.8:53: no such host
   2026-04-13 07:27:25.503 [ERROR][90] felix/health.go 390: Health endpoint 
failed, trying to restart it... error=listen tcp: lookup localhost on 
8.8.8.8:53: no such host
   2026-04-13 07:27:26.510 [ERROR][90] felix/health.go 390: Health endpoint 
failed, trying to restart it... error=listen tcp: lookup localhost on 
8.8.8.8:53: no such host
   2026-04-13 07:27:27.517 [ERROR][90] felix/health.go 390: Health endpoint 
failed, trying to restart it... error=listen tcp: lookup localhost on 
8.8.8.8:53: no such host
   2026-04-13 07:27:28.526 [ERROR][90] felix/health.go 390: Health endpoint 
failed, trying to restart it... error=listen tcp: lookup localhost on 
8.8.8.8:53: no such host
   2026-04-13 07:27:29.535 [ERROR][90] felix/health.go 390: Health endpoint 
failed, trying to restart it... error=listen tcp: lookup localhost on 
8.8.8.8:53: no such host
   2026-04-13 07:27:29.586 [INFO][90] felix/int_dataplane.go 2201: Received 
*proto.HostMetadataV4V6Update update from calculation graph. 
msg=hostname:"cl01-control-19d8025b62c" ipv4_addr:"10.1.0.249/24" 
labels:{key:"beta.kubernetes.io/arch" value:"amd64"} 
labels:{key:"beta.kubernetes.io/os" value:"linux"} 
labels:{key:"kubernetes.io/arch" value:"amd64"} 
labels:{key:"kubernetes.io/hostname" value:"cl01-control-19d8025b62c"} 
labels:{key:"kubernetes.io/os" value:"linux"} 
labels:{key:"node-role.kubernetes.io/control-plane" value:""} 
labels:{key:"node.kubernetes.io/exclude-from-external-load-balancers" value:""} 
labels:{key:"topology.csi.cloudstack.apache.org/zone" 
value:"48e11a80-49e5-4e2b-bf11-f21030cd8221"}
   2026-04-13 07:27:30.542 [ERROR][90] felix/health.go 390: Health endpoint 
failed, trying to restart it... error=listen tcp: lookup localhost on 
8.8.8.8:53: no such host
   2026-04-13 07:27:30.772 [INFO][90] felix/int_dataplane.go 2201: Received 
*proto.HostMetadataV4V6Update update from calculation graph. 
msg=hostname:"cl01-node-19d8027d736" ipv4_addr:"10.1.0.42/24" 
labels:{key:"beta.kubernetes.io/arch" value:"amd64"} 
labels:{key:"beta.kubernetes.io/os" value:"linux"} 
labels:{key:"kubernetes.io/arch" value:"amd64"} 
labels:{key:"kubernetes.io/hostname" value:"cl01-node-19d8027d736"} 
labels:{key:"kubernetes.io/os" value:"linux"} 
labels:{key:"topology.csi.cloudstack.apache.org/zone" 
value:"48e11a80-49e5-4e2b-bf11-f21030cd8221"}
   2026-04-13 07:27:31.551 [ERROR][90] felix/health.go 390: Health endpoint 
failed, trying to restart it... error=listen tcp: lookup localhost on 
8.8.8.8:53: no such host
   2026-04-13 07:27:32.559 [ERROR][90] felix/health.go 390: Health endpoint 
failed, trying to restart it... error=listen tcp: lookup localhost on 
8.8.8.8:53: no such host
   2026-04-13 07:27:33.567 [ERROR][90] felix/health.go 390: Health endpoint 
failed, trying to restart it... error=listen tcp: lookup localhost on 
8.8.8.8:53: no such host
   2026-04-13 07:27:34.575 [ERROR][90] felix/health.go 390: Health endpoint 
failed, trying to restart it... error=listen tcp: lookup localhost on 
8.8.8.8:53: no such host
   2026-04-13 07:27:35.584 [ERROR][90] felix/health.go 390: Health endpoint 
failed, trying to restart it... error=listen tcp: lookup localhost on 
8.8.8.8:53: no such host
   2026-04-13 07:27:36.592 [ERROR][90] felix/health.go 390: Health endpoint 
failed, trying to restart it... error=listen tcp: lookup localhost on 
8.8.8.8:53: no such host
   2026-04-13 07:27:37.600 [ERROR][90] felix/health.go 390: Health endpoint 
failed, trying to restart it... error=listen tcp: lookup localhost on 
8.8.8.8:53: no such host
   2026-04-13 07:27:38.608 [ERROR][90] felix/health.go 390: Health endpoint 
failed, trying to restart it... error=listen tcp: lookup localhost on 
8.8.8.8:53: no such host
   2026-04-13 07:27:39.373 [INFO][90] felix/int_dataplane.go 2201: Received 
*proto.HostMetadataV4V6Update update from calculation graph. 
msg=hostname:"cl01-control-19d802668f0" ipv4_addr:"10.1.0.61/24" 
labels:{key:"beta.kubernetes.io/arch" value:"amd64"} 
labels:{key:"beta.kubernetes.io/os" value:"linux"} 
labels:{key:"kubernetes.io/arch" value:"amd64"} 
labels:{key:"kubernetes.io/hostname" value:"cl01-control-19d802668f0"} 
labels:{key:"kubernetes.io/os" value:"linux"} 
labels:{key:"node-role.kubernetes.io/control-plane" value:""} 
labels:{key:"node.kubernetes.io/exclude-from-external-load-balancers" value:""} 
labels:{key:"topology.csi.cloudstack.apache.org/zone" 
value:"48e11a80-49e5-4e2b-bf11-f21030cd8221"}
   2026-04-13 07:27:39.614 [ERROR][90] felix/health.go 390: Health endpoint 
failed, trying to restart it... error=listen tcp: lookup localhost on 
8.8.8.8:53: no such host
   2026-04-13 07:27:40.622 [ERROR][90] felix/health.go 390: Health endpoint 
failed, trying to restart it... error=listen tcp: lookup localhost on 
8.8.8.8:53: no such host
   2026-04-13 07:27:41.628 [ERROR][90] felix/health.go 390: Health endpoint 
failed, trying to restart it... error=listen tcp: lookup localhost on 
8.8.8.8:53: no such host
   2026-04-13 07:27:42.636 [ERROR][90] felix/health.go 390: Health endpoint 
failed, trying to restart it... error=listen tcp: lookup localhost on 
8.8.8.8:53: no such host
   2026-04-13 07:27:43.644 [ERROR][90] felix/health.go 390: Health endpoint 
failed, trying to restart it... error=listen tcp: lookup localhost on 
8.8.8.8:53: no such host
   2026-04-13 07:27:44.652 [ERROR][90] felix/health.go 390: Health endpoint 
failed, trying to restart it... error=listen tcp: lookup localhost on 
8.8.8.8:53: no such host
   2026-04-13 07:27:45.659 [ERROR][90] felix/health.go 390: Health endpoint 
failed, trying to restart it... error=listen tcp: lookup localhost on 
8.8.8.8:53: no such host
   2026-04-13 07:27:46.666 [ERROR][90] felix/health.go 390: Health endpoint 
failed, trying to restart it... error=listen tcp: lookup localhost on 
8.8.8.8:53: no such host
   2026-04-13 07:27:47.675 [ERROR][90] felix/health.go 390: Health endpoint 
failed, trying to restart it... error=listen tcp: lookup localhost on 
8.8.8.8:53: no such host
   2026-04-13 07:27:48.705 [ERROR][90] felix/health.go 390: Health endpoint 
failed, trying to restart it... error=listen tcp: lookup localhost on 
8.8.8.8:53: no such host
   2026-04-13 07:27:49.715 [ERROR][90] felix/health.go 390: Health endpoint 
failed, trying to restart it... error=listen tcp: lookup localhost on 
8.8.8.8:53: no such host
   2026-04-13 07:27:50.722 [ERROR][90] felix/health.go 390: Health endpoint 
failed, trying to restart it... error=listen tcp: lookup localhost on 
8.8.8.8:53: no such host
   2026-04-13 07:27:51.730 [ERROR][90] felix/health.go 390: Health endpoint 
failed, trying to restart it... error=listen tcp: lookup localhost on 
8.8.8.8:53: no such host
   2026-04-13 07:27:52.738 [ERROR][90] felix/health.go 390: Health endpoint 
failed, trying to restart it... error=listen tcp: lookup localhost on 
8.8.8.8:53: no such host
   2026-04-13 07:27:53.745 [ERROR][90] felix/health.go 390: Health endpoint 
failed, trying to restart it... error=listen tcp: lookup localhost on 
8.8.8.8:53: no such host
   2026-04-13 07:27:54.755 [ERROR][90] felix/health.go 390: Health endpoint 
failed, trying to restart it... error=listen tcp: lookup localhost on 
8.8.8.8:53: no such host
   2026-04-13 07:27:55.762 [ERROR][90] felix/health.go 390: Health endpoint 
failed, trying to restart it... error=listen tcp: lookup localhost on 
8.8.8.8:53: no such host
   bird: Mesh_10_1_0_249: State changed to start
   2026-04-13 07:27:56.770 [ERROR][90] felix/health.go 390: Health endpoint 
failed, trying to restart it... error=listen tcp: lookup localhost on 
8.8.8.8:53: no such host
   2026-04-13 07:27:57.776 [ERROR][90] felix/health.go 390: Health endpoint 
failed, trying to restart it... error=listen tcp: lookup localhost on 
8.8.8.8:53: no such host
   2026-04-13 07:27:58.785 [ERROR][90] felix/health.go 390: Health endpoint 
failed, trying to restart it... error=listen tcp: lookup localhost on 
8.8.8.8:53: no such host
   2026-04-13 07:27:59.795 [ERROR][90] felix/health.go 390: Health endpoint 
failed, trying to restart it... error=listen tcp: lookup localhost on 
8.8.8.8:53: no such host
   2026-04-13 07:28:00.803 [ERROR][90] felix/health.go 390: Health endpoint 
failed, trying to restart it... error=listen tcp: lookup localhost on 
8.8.8.8:53: no such host
   2026-04-13 07:28:01.811 [ERROR][90] felix/health.go 390: Health endpoint 
failed, trying to restart it... error=listen tcp: lookup localhost on 
8.8.8.8:53: no such host
   2026-04-13 07:28:02.820 [ERROR][90] felix/health.go 390: Health endpoint 
failed, trying to restart it... error=listen tcp: lookup localhost on 
8.8.8.8:53: no such host
   2026-04-13 07:28:03.829 [ERROR][90] felix/health.go 390: Health endpoint 
failed, trying to restart it... error=listen tcp: lookup localhost on 
8.8.8.8:53: no such host
   2026-04-13 07:28:04.837 [ERROR][90] felix/health.go 390: Health endpoint 
failed, trying to restart it... error=listen tcp: lookup localhost on 
8.8.8.8:53: no such host
   2026-04-13 07:28:05.846 [ERROR][90] felix/health.go 390: Health endpoint 
failed, trying to restart it... error=listen tcp: lookup localhost on 
8.8.8.8:53: no such host
   2026-04-13 07:28:06.854 [ERROR][90] felix/health.go 390: Health endpoint 
failed, trying to restart it... error=listen tcp: lookup localhost on 
8.8.8.8:53: no such host
   amitvyas@LTQQ9JK7N3 .kube % 
   
   ```
   
   Once I login to either master / worker node and make an manual entry in 
/etc/hosts as ``` 127.0.0.1 localhost ``` then it start working as expected.
   
   I haven't seen this happening when deploying CKS using system template.
   
   Has any once faced such issue ?
   
   
   Regards,
   Amit Vyas


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