ci(tmt): increase hardware requirements for nested virt tests

Request 4 CPUs, 16 GB RAM, and 40 GB disk from Testing Farm.
The previous 2 CPUs and 6 GB RAM left insufficient headroom
 for nested VMs, causing intermittent DHCP/network failures.

Also increase VM RAM from 3-4 GB to 8 GB for faster boot and
improved test reliability.

Assisted-by: Claude (claude-opus-4-6)
Signed-off-by: Paul Whalen <pwhalen@fedoraproject.org>

Author: Paul Whalen

tests/greenboot-bootc-anaconda-iso.sh

@@ -330,7 +330,7 @@ ISO_LABEL=$(blkid -o value -s LABEL /var/lib/libvirt/images/install.iso)
 greenprint "ISO label: ${ISO_LABEL}"
 sudo virt-install  --name="${TEST_UUID}-uefi"\
                    --disk path="${LIBVIRT_IMAGE_PATH_UEFI}",format=qcow2 \
-                   --ram 3072 \
+                   --ram 8192 \
                    --vcpus 2 \
                    --network network=integration,mac=34:49:22:B0:83:30 \
                    --os-type linux \

tests/greenboot-bootc-qcow2.sh

@@ -319,7 +319,7 @@ sudo restorecon -Rv /var/lib/libvirt/images/
 
 sudo virt-install  --name="${TEST_UUID}-uefi"\
                    --disk path="${LIBVIRT_IMAGE_PATH_UEFI}",format=qcow2 \
-                   --ram 3072 \
+                   --ram 8192 \
                    --vcpus 2 \
                    --network network=integration,mac=34:49:22:B0:83:30 \
                    --os-type linux \

tests/greenboot-fedora-iot-raw.sh

@@ -249,7 +249,7 @@ sudo kpartx -dv "${LIBVIRT_IMAGE_PATH}"
 greenprint "🚀 Installing VM from raw image"
 sudo virt-install  --name="${IMAGE_KEY}"\
                    --disk path="${LIBVIRT_IMAGE_PATH}",format=raw \
-                   --ram 4096 \
+                   --ram 8192 \
                    --vcpus 2 \
                    --network network=integration,mac=34:49:22:B0:83:30 \
                    --os-variant ${OS_VARIANT} \

tests/greenboot-ostree.sh

@@ -432,7 +432,7 @@ sudo virt-install  --name="${IMAGE_KEY}"\
                    --initrd-inject="${KS_FILE}" \
                    --extra-args="inst.ks=file:/ks.cfg console=ttyS0,115200" \
                    --disk path="${LIBVIRT_IMAGE_PATH}",format=qcow2 \
-                   --ram 4096 \
+                   --ram 8192 \
                    --vcpus 2 \
                    --network network=integration,mac=34:49:22:B0:83:30 \
                    --os-variant ${OS_VARIANT} \

tmt/plans/greenboot-test.fmf

@@ -9,8 +9,10 @@ provision:
     virtualization:
       is-supported: true
     cpu:
-      processors: ">= 2"
-    memory: ">= 6 GB"
+      processors: ">= 4"
+    memory: ">= 16 GB"
+    disk:
+      - size: ">= 40 GB"
 
 /bootc-qcow2:
   summary: Test greenboot with bootc qcow2 image