Add support for mariner-3.0 in dom0 kernel installer

dom0 image based on mariner 3.0 has different
parameter that need to be changed while installing kernel
under different file. Add support for it under kernel
installer transformer.

Signed-off-by: Smit Gardhariya <[email protected]>

lisa/transformers/dom0_kernel_installer.py

@@ -80,6 +80,9 @@ def install(self) -> str:
         uname = node.tools[Uname]
         current_kernel = uname.get_linux_information().kernel_version_raw
 
+        node_info = node.get_information()
+        distro = node_info.get("distro_version", "")
+
         # Kernel absolute path: /home/user/vmlinuz-5.15.57.1+
         # Naming convention : vmlinuz-<version>
         new_kernel = os.path.basename(kernel_image_path).split("-")[1].strip()
@@ -124,10 +127,19 @@ def install(self) -> str:
                 node.get_pure_path(f"/boot/initrd.img-{new_kernel}"),
             )
         else:
+            # Mariner 2.0 initrd
+            target = f"/boot/initrd.img-{current_kernel}"
+            link = f"/boot/initrd.img-{new_kernel}"
+
+            if distro == "Microsoft Azure Linux 3.0":
+                # Mariner 3.0 initrd
+                target = f"/boot/initramfs-{current_kernel}.img"
+                link = f"/boot/initramfs-{new_kernel}.img"
+
             ln = node.tools[Ln]
             ln.create_link(
-                target=f"/boot/initrd.img-{current_kernel}",
-                link=f"/boot/initrd.img-{new_kernel}",
+                target=target,
+                link=link,
             )
 
         if kernel_config_path:
@@ -148,6 +160,7 @@ def install(self) -> str:
             node,
             current_kernel,
             new_kernel,
+            distro,
         )
 
         return new_kernel
@@ -185,10 +198,13 @@ def install(self) -> str:
         uname = node.tools[Uname]
         current_kernel = uname.get_linux_information().kernel_version_raw
 
+        node_info = node.get_information()
+        distro = node_info.get("distro_version", "")
         _update_mariner_config(
             node,
             current_kernel,
             new_kernel,
+            distro,
         )
 
         return new_kernel
@@ -211,22 +227,35 @@ def _update_mariner_config(
     node: Node,
     current_kernel: str,
     new_kernel: str,
+    distro: str,
 ) -> None:
-    mariner_config: str = "/boot/mariner-mshv.cfg"
     sed = node.tools[Sed]
 
-    # Modify the /boot/mariner-mshv.cfg to point new kernel binary
+    # Param for Dom0 2.0 kernel installation
+    mariner_config = "/boot/mariner-mshv.cfg"
+    vmlinuz_regexp = f"vmlinuz-{current_kernel}"
+    vmlinuz_replacement = f"vmlinuz-{new_kernel}"
+    initrd_regexp = f"mariner_initrd_mshv=initrd.img-{current_kernel}"
+    initrd_replacement = f"mariner_initrd_mshv=initrd.img-{new_kernel}"
+
+    if distro == "Microsoft Azure Linux 3.0":
+        # Change param for Dom0 3.0 kernel installation
+        mariner_config = "/boot/grub2/grub.cfg"
+        initrd_regexp = f"initramfs-{current_kernel}.img"
+        initrd_replacement = f"initramfs-{new_kernel}.img"
+
+    # Modify file to point new kernel binary
     sed.substitute(
-        regexp=f"mariner_linux_mshv=vmlinuz-{current_kernel}",
-        replacement=f"mariner_linux_mshv=vmlinuz-{new_kernel}",
+        regexp=vmlinuz_regexp,
+        replacement=vmlinuz_replacement,
         file=mariner_config,
         sudo=True,
     )
 
-    # Modify the /boot/mariner-mshv.cfg to point new initrd binary
+    # Modify file to point new initrd binary
     sed.substitute(
-        regexp=f"mariner_initrd_mshv=initrd.img-{current_kernel}",
-        replacement=f"mariner_initrd_mshv=initrd.img-{new_kernel}",
+        regexp=initrd_regexp,
+        replacement=initrd_replacement,
         file=mariner_config,
         sudo=True,
     )