I'm starting with K8S. I installed 2 Debian 10 VMs on Azure (1 master node & 2 slaves).

I installed the master node with this doc: https://kubernetes.io/docs/setup/production-environment/tools/kubeadm/install-kubeadm/

I installed Calico with this one : https://docs.projectcalico.org/getting-started/kubernetes/installation/calico#installing-with-the-kubernetes-api-datastore50-nodes-or-less

I created a simple nginx deployment:

kubectl run nginx --replicas=2 --image=nginx

I have the following pods (sazultk8s1/2 are the working nodes) :

root@itf-infra-sazultk8s0-vm:~# kubectl get pods -o wide
NAME                     READY   STATUS    RESTARTS   AGE   IP               NODE                          
nginx-6db489d4b7-mzmnq              1/1     Running   0          12s   192.168.47.18     itf-infra-sazultk8s2-vm   
nginx-6db489d4b7-sgdz7              1/1     Running   0          12s   192.168.247.115   itf-infra-sazultk8s1-vm

From the master node I can't curl to these nginx:

root@itf-infra-sazultk8s0-vm:~# curl 192.168.47.18 --connect-timeout 5
curl: (28) Connection timed out after 5001 milliseconds
root@itf-infra-sazultk8s0-vm:~# curl 192.168.247.115 --connect-timeout 5
curl: (28) Connection timed out after 5000 milliseconds

I tried from a simple busybox image:

kubectl run access --rm -ti --image busybox /bin/sh
/ #ifconfig eth0 | grep -i inet
   inet addr:192.168.247.116  Bcast:0.0.0.0  Mask:255.255.255.255
/ # wget --timeout 5 192.168.247.115
Connecting to 192.168.247.115 (192.168.247.115:80)
saving to 'index.html'
index.html           100% |********************************************************************************************************|   612  0:00:00 ETA
'index.html' saved
/ # wget --timeout 5 192.168.47.18
Connecting to 192.168.47.18 (192.168.47.18:80)
wget: download timed out

From a scratch install:

1. does a pod can ping a pod on another host ?
2. is it possible to curl from master node to a pod on a worker node ?
3. does azure apply restrictions and prevent k8s to work properly ?