Unable to access the microk8s services if I not restart the vm network

[springflutter]

Hi, I have a VM with CentOs 7 where I installed microk8s service. The microk8s service implemented works fine in the VM and other external machines on the same network. However, after a couple of minutes the service stop working just in the external machines (in the VM where it is intalled the microk8s services works perfectly) and then I have to restart the network(via web GUI) in order to be able to access the service (just for a couple minutes). Moreover, I notice that the ssh connection also stop working at the same time that the microk8s service and this message appear
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ @ WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED! @ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ IT IS POSSIBLE THAT SOMEONE IS DOING SOMETHING NASTY!
So, I apply the the command suggested ssh-keygen -f "/home/pc01/.ssh/known_hosts" -R "myipserver" or I added the TCPKeepAlive yes and ServerAliveInterval 120 among others to the ssh_config and sshd_config, but then my password is not recognized and I can not access to the VM by ssh unless that I restart the network. I also notice that if I do not apply the above command and I just restart the network the above warming message dissapear, and I'm able to access to the VM without problems as well as the microk8s service. So, how could I fix this network problem? I'm using a proxmox Virtual Environment 7.2-3. I really aprreciated your help I have been trying to fix this problem for weeks without sucess. Sorry for my English !

 

[mira]

It seems that something on that server is modifying your SSH keys regularly. Check all installed software and any CRON jobs that you've configured.

 

[springflutter]

It seems that something on that server is modifying your SSH keys regularly. Check all installed software and any CRON jobs that you've configured.

Hi, thanks for your reply. It is a new VM I just installed Centos 7 minimal and microk8s with snapd. I'm not configured any cron job. The same problem occurs if I change to Ubuntu OS. Any other idea? Should I change the proxmox version?

 

[mira]

Do you use DHCP for the VM?
I see no reason why PVE would interfere with the network settings of the VM.

 

[springflutter]

Do you use DHCP for the VM?
I see no reason why PVE would interfere with the network settings of the VM.

No, I use static IP for the VM

 

[mira]

Can you try a clean CentOS7 install without microk8s and snapd to see if it behaves similarly?

 

[springflutter]

Hi, I tried with a clean CentOS7 but it did not work either. So, I decided to change the proxmox version 7.1-7 and it works! What I notice was that before I was using a second vmbr linux bridge (vmbr1) that I configure for th VM, but now I just use the same that I'm using with proxmox node (vmbr0). I'm not sure If that was the problem but I that is the only difference that I have with the previous config and it could work if someone have this problem in the future. Thanks for your help!

 

[mira]

Which version did you use before? The latest PVE 7.2?