stages/grub2: make booting in ro/rw mode configurable

Move the decision whether the root fs should be mounted ro or rw
into the pipeline configuration.

Update the pipelines accordingly.

Signed-off-by: Tom Gundersen <teg@jklm.no>

samples/base-qcow2.json

@@ -33,15 +33,30 @@
       }
     },
     {
-      "name": "org.osbuild.selinux",
+      "name": "org.osbuild.fstab",
       "options": {
-        "file_contexts": "etc/selinux/targeted/contexts/files/file_contexts"
+        "filesystems": [
+          {
+            "uuid": "76a22bf4-f153-4541-b6c7-0332c0dfaeac",
+            "vfs_type": "ext4",
+            "path": "/",
+            "freq": "1",
+            "passno": "1"
+          }
+        ]
       }
     },
     {
       "name": "org.osbuild.grub2",
       "options": {
-        "root_fs_uuid": "76a22bf4-f153-4541-b6c7-0332c0dfaeac"
+        "root_fs_uuid": "76a22bf4-f153-4541-b6c7-0332c0dfaeac",
+        "kernel_opts": "ro biosdevname=0 net.ifnames=0 console=ttyS0,115200"
+      }
+    },
+    {
+      "name": "org.osbuild.selinux",
+      "options": {
+        "file_contexts": "etc/selinux/targeted/contexts/files/file_contexts"
       }
     },
     {

stages/org.osbuild.grub2

@@ -20,7 +20,7 @@ def main(tree, options):
         env.write("# GRUB Environment Block\n"
                   f"GRUB2_ROOT_FS_UUID={root_fs_uuid}\n"
                   f"GRUB2_BOOT_FS_UUID={root_fs_uuid}\n"
-                  f"kernelopts=root=UUID={root_fs_uuid} rw {kernel_opts}\n")
+                  f"kernelopts=root=UUID={root_fs_uuid} {kernel_opts}\n")
     with open(f"{tree}/boot/grub2/grub.cfg", "w") as cfg:
         cfg.write("set timeout=0\n"
                   "load_env\n"

test/pipelines/web-server.json

@@ -46,7 +46,8 @@
     {
       "name": "org.osbuild.grub2",
       "options": {
-        "root_fs_uuid": "76a22bf4-f153-4541-b6c7-0332c0dfaeac"
+        "root_fs_uuid": "76a22bf4-f153-4541-b6c7-0332c0dfaeac",
+        "kernel_opts": "rw"
       }
     }
   ],