[ClusterLabs] Q: VirtualDomain RA

[Ulrich Windl]

Hi!

I have a question about the VirtualDomain RA (as in SLES15 SP2):
Why does the RA "undefine", then "create" a domain instead of just "start"ing a domain?
I mean: Assuming that an "installation" does "define" the domains, why bother with configuration files and "create" when a simple "start" would do also?

Specifically this code:
verify_undefined() {
        local tmpf
        if virsh --connect=${OCF_RESKEY_hypervisor} list --all --name 2>/dev/null | grep -wqs "$DOMAIN_NAME"
        then
                tmpf=$(mktemp -t vmcfgsave.XXXXXX)
                if [ ! -r "$tmpf" ]; then
                        ocf_log warn "unable to create temp file, disk full?"
                        # we must undefine the domain
                        virsh $VIRSH_OPTIONS undefine $DOMAIN_NAME > /dev/null 2>&1
                else
                        cp -p $OCF_RESKEY_config $tmpf
                        virsh $VIRSH_OPTIONS undefine $DOMAIN_NAME > /dev/null 2>&1
                        [ -f $OCF_RESKEY_config ] || cp -f $tmpf $OCF_RESKEY_config
                        rm -f $tmpf
                fi
        fi
}

Regards,
Ulrich