diff --git a/devstack/lib/ironic b/devstack/lib/ironic
index aae8ca5cf3..cd27c35212 100644
--- a/devstack/lib/ironic
+++ b/devstack/lib/ironic
@@ -2943,8 +2943,16 @@ function upload_baremetal_ironic_efiboot {
 
         sudo mkdir -p $efiboot_mount/efi/boot
 
-        sudo cp "$IRONIC_GRUB2_SHIM_FILE" $efiboot_mount/efi/boot/bootx64.efi
-        sudo cp "$IRONIC_GRUB2_FILE" $efiboot_mount/efi/boot/grubx64.efi
+        if [[ "$IRONIC_GRUB2_SHIM_FILE" =~ "http".* ]]; then
+            sudo wget "$IRONIC_GRUB2_SHIM_FILE" -O $efiboot_mount/efi/boot/bootx64.efi
+        else
+            sudo cp "$IRONIC_GRUB2_SHIM_FILE" $efiboot_mount/efi/boot/bootx64.efi
+        fi
+        if [[ "$IRONIC_GRUB2_FILE" =~ "http".* ]]; then
+            sudo wget "$IRONIC_GRUB2_FILE" -O $efiboot_mount/efi/boot/grubx64.efi
+        else
+            sudo cp "$IRONIC_GRUB2_FILE" $efiboot_mount/efi/boot/grubx64.efi
+        fi
 
         sudo umount $efiboot_mount
 
@@ -2981,7 +2989,7 @@ function upload_baremetal_ironic_efiboot {
         # NOTE(dtantsur): this is likely incorrect
         efi_grub_path=EFI/BOOT/grub.cfg
     fi
-    iniset $IRONIC_CONF_FILE DEFAULT grub_config_path $efi_grub_path
+    iniset $IRONIC_CONF_FILE DEFAULT grub_config_path ${IRONIC_GRUB2_CONFIG_PATH:-$efi_grub_path}
 }
 
 # build deploy kernel+ramdisk, then upload them to glance
diff --git a/zuul.d/ironic-jobs.yaml b/zuul.d/ironic-jobs.yaml
index f311ef1ecb..58d9de525d 100644
--- a/zuul.d/ironic-jobs.yaml
+++ b/zuul.d/ironic-jobs.yaml
@@ -299,6 +299,9 @@
         # result and makes this job VERY sensitive to heavy disk IO of the
         # underlying hypervisor/cloud.
         IRONIC_CALLBACK_TIMEOUT: 800
+        IRONIC_GRUB2_SHIM_FILE: https://mirror.iad3.inmotion.opendev.org/centos-stream/9-stream/BaseOS/x86_64/os/EFI/BOOT/BOOTX64.EFI
+        IRONIC_GRUB2_FILE: https://mirror.iad3.inmotion.opendev.org/centos-stream/9-stream/BaseOS/x86_64/os/EFI/BOOT/grubx64.efi
+        IRONIC_GRUB2_CONFIG_PATH: EFI/BOOT/grub.cfg
       devstack_services:
         s-account: True
         s-container: True