Add Serial consoles

Signed-off-by: Denis 'GNUtoo' Carikli <GNUtoo@cyberdimension.org>

mumble-vm-system.scm.tmpl

@@ -86,7 +86,9 @@ the services after that.")
   (operating-system
    (bootloader (bootloader-configuration
                 (bootloader grub-minimal-bootloader)
-                (targets '("/dev/vda"))))
+                (targets '("/dev/vda"))
+                (terminal-outputs '(serial_0))))
+   (kernel-arguments (append '("console=ttyS0")))
    ;; TODO: Does Mumble have some data? Is BTRFS safer than using ext4
    ;; without doing many fsck?
    (file-systems (cons (file-system
@@ -110,6 +112,19 @@ the services after that.")
    (services
     (append
      (list
+      ;; Agetty
+
+      ;; ttyS0 is already setup automatically due to the console=ttyS0
+      ;; kernel argument
+      (service agetty-service-type
+               (agetty-configuration (term "xterm-256color")
+                                     (tty "ttyS1")))
+      (service agetty-service-type
+               (agetty-configuration (term "xterm-256color")
+                                     (tty "ttyS2")))
+      (service agetty-service-type
+               (agetty-configuration (term "xterm-256color")
+                                     (tty "ttyS3")))
       ;; Certbot
       (service
        certbot-service-type

mumble-vm.xml

@@ -61,6 +61,21 @@
         <model name="isa-serial"/>
       </target>
     </serial>
+    <serial type="pty">
+      <target type="isa-serial" port="1">
+        <model name="isa-serial"/>
+      </target>
+    </serial>
+    <serial type="pty">
+      <target type="isa-serial" port="2">
+        <model name="isa-serial"/>
+      </target>
+    </serial>
+    <serial type="pty">
+      <target type="isa-serial" port="3">
+        <model name="isa-serial"/>
+      </target>
+    </serial>
     <console type="pty">
       <target type="serial" port="0"/>
     </console>
@@ -87,4 +102,3 @@
   </devices>
   <seclabel type="dynamic" model="dac" relabel="yes"/>
 </domain>
-