Roland
Earlier attempts to install Qlustar using a manual setup method have all failed, so I have been installing Qlustar with the Public Network set up using DHCP for the past 2 weeks, and I have not specified a DNS server. To be able to answer your question, I just performed another install with a manual setup for the Public Network using: ip address 192.168.0.200 (having learned through trial and error how to avoid the address range that is used by the router for DHCP addressing), Network Mask: 255.255.255.0, Gateway 192.168.0.1 (address of my router that acts as Gateway), DNS 192.168.0.1 (address of my router, which provides DNS service when DHCP is selected). This attempt has succeeded. I proceeded to run the /usr/sbin/qlustar-initial-config script, which ran to completion with no error. I performed the re-boot as instructed in the First Steps Guide, and proceeded with retrieving a One Time Token (Section 1.6), which executed successfully. I installed the QluMan GUI (Section 1.6.2). using the instruction
apt install qluman-qt
which executed without error. I attempted to open the QluMan GUI with the instruction qluman-qt and the instruction qluman-qt &, but both of those instructions result in the response:
cannot connect to x server
I quickly scanned the QluMan Guide to see if there was an instruction there for how to open the QluMan GUI, but didn't see one. How about one more lifeline and tell me how I open the QluMan GUI that is installed on a Master node and Front End for a small 4-node cluster, or, if you can tell that I have installed it incorrectly, tell me how to install the QluMan GUI and then how do I open it? Your patience has served me very well. Thank you for this help. I think it is a little unfortunate that installing Qlustar with DHCP selected for the Public network doesn't work for my hardware setup. I will definitely try again when Qlustar releases v12 using Ubuntu 20.04. You noted in your first response that I will need to manually register the nodes in order to get them to boot. I will attempt to do that once I get a functioning GUI to work from. If I have trouble, I'll open another mail discussion. My academic project is to create a Singularity container that sets up an HPC cluster from a small number of Ethernet connected computers, and allows an MPI enabled program to run (also from inside the container). I'll initially try to do that as simply as possible from scratch, and then building on that, I'll attempt to construct a container that has Qlustar as the container OS. Do you have advice on how I might go about that, or is it not possible to do? Thanks again for the help. I look forward to learning how to use GluMan (starting with getting it to open up!).
regards, Kim