In this chapter, we listed out some common problems and solutions that we might face during daily operation, from system access problems to the actual cluster-related problems for a Proxmox cluster. Of course, I cannot list out all the circumstances that would cause the problem, but we can list some ideas by checking the system log files under the following paths:
/var/log/messages/var/log/syslog/var/log/cluster/qdiskd.log/var/log/cluster/corosync.log/var/log/cluster/dlm_controld.log/var/log/cluster/fenced.log/var/log/cluster/rgmanager.log
If you have read through this book, I have no doubt that you have learned not only the practical techniques, but also the background concepts behind this software. Proxmox is an open source virtualization tool that comes with amazing functionalities. If you are new to virtualization, Proxmox would be a good starting point for you to catch a glimpse of how system administrators or developers work when creating a cluster system.