fix: Copy NetworkManager connection profiles generated by dracut to sysroot

package/harvester-os/files/system/oem/90_network.yaml

@@ -1,5 +1,32 @@
 name: "Network configuration"
 stages:
+  # dracut's network-manager module runs at the very end of initrd process, after cOS' "rootfs" and "initramfs" stages,
+  # so we need to copy these connection profile files at the boot stage
+  boot:
+    - name: Copy NetworkManager connections generated by dracut
+      if: cat /proc/cmdline | grep -q "harvester.install.automatic=true"
+      commands:
+      - |
+        echo "Copy NetworkManager connection profiles generated by dracut to sysroot"
+        cp /run/initramfs/state/etc/NetworkManager/system-connections/* /etc/NetworkManager/system-connections/
+
+    - name: Copy resolv.conf generated by dracut
+      if: cat /proc/cmdline | grep -q "harvester.install.automatic=true"
+      commands:
+      - |
+        generated_resolv="/run/initramfs/state/etc/resolv.conf"
+        if [ -f $generated_resolv ]; then
+          cp $generated_resolv /etc/resolv.conf
+          echo "Copied $generated_resolv to /etc/resolv.conf"
+        else
+          # TODO: Figure out if this section is necessary or not for NetworkManager
+          # ifcfg module does not recognize the net.*.resolv.conf.ipv4 because of those ipv4 suffix.
+          # We need to gather them by ourselves
+          for i in /run/initramfs/net.*.resolv.conf*; do
+            [ -f "$i" ] && cat "$i"
+          done | sort -u > /etc/resolv.conf
+          echo "/etc/resolv.conf is generated from each interface's resolv.conf"
+        fi
   network:
     - name: Bring up interfaces
       commands: