Make a VM template without using LVM in KVM

In my opinion, template is the most useful feature in virtualization technology. After creating one fully installed VM, you can create several temporary VMs from the original without spend lots of hours or lots of disk space. In LVM environment, you can use 'snapshot' feature of lvcreate command. But, LVM volume is not easy to… Continue reading Make a VM template without using LVM in KVM

What’s the internal details for ‘-startdate’ option in ‘qemu-kvm’

When you run KVM-based virtual machine, you can specify '-startdate' option. What format we can use and what actions are happening inside the qemu-kvm. Options are checked in main() function in vl.c. case QEMU_OPTION_startdate: { struct tm tm; time_t rtc_start_date; if (!strcmp(optarg, "now")) { rtc_date_offset = -1; } else { if (sscanf(optarg, "%d-%d-%dT%d:%d:%d", &tm.tm_year, &tm.tm_mon,… Continue reading What’s the internal details for ‘-startdate’ option in ‘qemu-kvm’