image: T4516: Added system image tools

This commit adds the whole set of system image tools written from the scratch in
Python that allows performing all the operations on images:

* check information
* perform installation and deletion
* versions management

Also, it contains a new service that will update the GRUB menu and keep tracking
its version in the future.

WARNING: The commit contains non-reversible changes. Because of boot menu
changes, it will not be possible to manage images from older VyOS versions after
an update.

(cherry picked from commit 8f94262e8fa2477700c50303ea6e2c6ddad72adb)

7 files changed, 115 insertions, 0 deletions

diff --git a/data/templates/grub/grub_common.j2 b/data/templates/grub/grub_common.j2
new file mode 100644
index 000000000..78df3f48c
--- /dev/null
+++ b/data/templates/grub/grub_common.j2
@@ -0,0 +1,22 @@
+# load EFI video modules
+if [ "${grub_platform}" == "efi" ]; then
+    insmod efi_gop
+    insmod efi_uga
+fi
+
+# create and activate serial console
+function setup_serial {
+    # initialize the first serial port by default
+    if [ "${console_type}" == "ttyS" ]; then
+        serial --unit=${console_num}
+    else
+        serial --unit=0
+    fi
+    terminal_output --append serial console
+    terminal_input --append serial console
+}
+
+setup_serial
+
+# find root device
+#search --no-floppy --fs-uuid --set=root ${root_uuid}
diff --git a/data/templates/grub/grub_main.j2 b/data/templates/grub/grub_main.j2
new file mode 100644
index 000000000..0c7ea0202
--- /dev/null
+++ b/data/templates/grub/grub_main.j2
@@ -0,0 +1,7 @@
+load_env
+insmod regexp
+
+for cfgfile in ${prefix}/grub.cfg.d/*-autoload.cfg
+do
+    source ${cfgfile}
+done
diff --git a/data/templates/grub/grub_menu.j2 b/data/templates/grub/grub_menu.j2
new file mode 100644
index 000000000..e73005f5d
--- /dev/null
+++ b/data/templates/grub/grub_menu.j2
@@ -0,0 +1,5 @@
+for cfgfile in ${config_directory}/vyos-versions/*.cfg
+do
+    source "${cfgfile}"
+done
+source ${config_directory}/50-vyos-options.cfg
diff --git a/data/templates/grub/grub_modules.j2 b/data/templates/grub/grub_modules.j2
new file mode 100644
index 000000000..24b540c9d
--- /dev/null
+++ b/data/templates/grub/grub_modules.j2
@@ -0,0 +1,3 @@
+{% for mod_name in mods_list %}
+insmod {{ mod_name | e }}
+{% endfor %}
diff --git a/data/templates/grub/grub_options.j2 b/data/templates/grub/grub_options.j2
new file mode 100644
index 000000000..c8a1472e1
--- /dev/null
+++ b/data/templates/grub/grub_options.j2
@@ -0,0 +1,52 @@
+submenu "Boot options" {
+    submenu "Select boot mode" {
+        menuentry "Normal" {
+            set bootmode="normal"
+            export bootmode
+            configfile ${prefix}/grub.cfg.d/*vyos-menu*.cfg
+        }
+        menuentry "Password reset" {
+            set bootmode="pw_reset"
+            export bootmode
+            configfile ${prefix}/grub.cfg.d/*vyos-menu*.cfg
+        }
+        menuentry "System recovery" {
+            set bootmode="recovery"
+            export bootmode
+            configfile ${prefix}/grub.cfg.d/*vyos-menu*.cfg
+        }
+        menuentry "Load the whole root filesystem to RAM" {
+            set boot_toram="yes"
+            export boot_toram
+            configfile ${prefix}/grub.cfg.d/*vyos-menu*.cfg
+        }
+    }
+    submenu "Select console type" {
+        menuentry "tty (graphical)" {
+            set console_type="tty"
+            export console_type
+            configfile ${prefix}/grub.cfg.d/*vyos-menu*.cfg
+        }
+        menuentry "ttyS (serial)" {
+            set console_type="ttyS"
+            export console_type
+            setup_serial
+            configfile ${prefix}/grub.cfg.d/*vyos-menu*.cfg
+        }
+        menuentry "ttyUSB (USB serial)" {
+            set console_type="ttyUSB"
+            export console_type
+            setup_serial
+            configfile ${prefix}/grub.cfg.d/*vyos-menu*.cfg
+        }
+    }
+    menuentry "Enter console number" {
+        read console_num
+        export console_num
+        setup_serial
+        configfile ${prefix}/grub.cfg.d/*vyos-menu*.cfg
+    }
+    menuentry "Current: boot mode: ${bootmode}, console: ${console_type}${console_num}" {
+        echo
+    }
+}
diff --git a/data/templates/grub/grub_vars.j2 b/data/templates/grub/grub_vars.j2
new file mode 100644
index 000000000..e0002e8d8
--- /dev/null
+++ b/data/templates/grub/grub_vars.j2
@@ -0,0 +1,4 @@
+{% for var_name, var_value in vars.items() %}
+set {{ var_name | e }}="{{ var_value | e }}"
+export {{ var_name | e }}
+{% endfor %}
diff --git a/data/templates/grub/grub_vyos_version.j2 b/data/templates/grub/grub_vyos_version.j2
new file mode 100644
index 000000000..6e8f45210
--- /dev/null
+++ b/data/templates/grub/grub_vyos_version.j2
@@ -0,0 +1,22 @@
+{% set boot_opts_default = "boot=live rootdelay=5 noautologin net.ifnames=0 biosdevname=0 vyos-union=/boot/" + version_name %}
+{% if boot_opts != '' %}
+{%     set boot_opts_rendered = boot_opts %}
+{% else %}
+{%     set boot_opts_rendered = boot_opts_default %}
+{% endif %}
+menuentry "{{ version_name }}" --id {{ version_uuid }} {
+    set boot_opts="{{ boot_opts_rendered }}"
+    # load rootfs to RAM
+    if [ "${boot_toram}" == "yes" ]; then
+        set boot_opts="${boot_opts} toram"
+    fi
+    if [ "${bootmode}" == "pw_reset" ]; then
+        set boot_opts="${boot_opts} console=${console_type}${console_num} init=/opt/vyatta/sbin/standalone_root_pw_reset"
+    elif [ "${bootmode}" == "recovery" ]; then
+        set boot_opts="${boot_opts} console=${console_type}${console_num} init=/usr/bin/busybox init"
+    else
+        set boot_opts="${boot_opts} console=${console_type}${console_num}"
+    fi
+    linux "/boot/{{ version_name }}/vmlinuz" ${boot_opts}
+    initrd "/boot/{{ version_name }}/initrd.img"
+}