I have set up a small cluster with a Master and 2 compute nodes. The Master has public and private Ethernet interfaces. The public interface is the connection to the internet. The private interface is the connection with the compute nodes.
I installed Qlustar 11.0.1-0 on the Master, which completed with no issue. I had to restart the network services with
systemctl restart systemd-resolved.service
after the second re-boot during installation, and then proceeded with the First Steps checklist. I did not configure a Demo Cluster (Step 1.3) and I did not install additional software (Step 1.5). First Steps went fine up until step 1.6 "Running the Cluster Manager QluMan". Using the Head Node, I obtained a one-time token and saved it to /media/token (Step 1.6.1). When I attempted to install QluMan (Step 1.6.2), the review of packages that appeared on the monitor was normal looking, but the installation of each package failed. Failure indication was the same for each package to be installed; There was a notice that started with "Failed to fetch http://repo.qlustar.com/repo/ubuntu/pool/ ..." and ended with "... temporary failure resolving "repo.qlustar.com".
I did a little communication check of the public network: ping www.google.com produced "Temporary failure in name resolution" ping 8.8.8.8 produced a steady stream of reports of "64 bytes from 8.8.8.8: icmp_seq=<n> tt1=116 time = 78.2 ms", with <n> incrementing each time.
I also note that when I power up the 2 compute nodes after the successful Qlustar installation on the Master, there is no booting going on, which I presume may be related to whatever has made the Master unable to resolve network ip addresses and names.
I am a CS student working a project that required a small cluster computer, so I have no particular skill with the technology here. I spent the better part of the day trying to figure out what I'm doing wrong, but I have failed. The issue is reproducible. I have done multiple installs from scratch and always get the same result. I note that the Qlustar OS installation and the early First Steps require access to the Qlustar.com repo, and that the "Final Reboot" at Step 1.2 appears to be when the Master node loses its ability to resolve network addresses and names and becomes unable to access the Qlustar.com repo. Do any of the kind listeners recognize my error or perhaps could recommend some sequence of steps I might take to isolate the problem?
Kim