Migrate new file structure to crux (#435)

* order workflows and add submodule

* rename gitmodules file

* delete docs/.gitignore

* add vyos custom linter

* correct __pycache__ in gitignore

* add test-coverage.py

* move draw.io folder

* arrange changelog, install history and about

* arrange: firewall

* arrange: highavailability

* arrange: loadbalancing

* arrange: nat

* arrange: services

* sort configexamples and configuration interfaces

* wireles: rename wireless

* rearrange: Protocols and Policy

* rearrange: Firewall and Zone Policy

* rearrange: Interfaces

* rearrange: Interfaces

* rearrange: dynamic DNS

* hostinfo: add page to index

* rearrange: appendix

* venv: add Pipfile

* rearrange: contributing

* index: remove debugging

* rearrange: fix all figure and refs

* rearrange: commandtree

* fix: cli, openvpn, install headline level

* protocols: change headline

* firewall: move mss clamping

* ip: separate ipv4 and ipv6

* arp: move to static page

* igmp: rename multicast page

* Update to year 2021

1 files changed, 115 insertions, 0 deletions

diff --git a/docs/installation/image.rst b/docs/installation/image.rst
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+.. _image-mgmt:
+
+################
+Image Management
+################
+
+The VyOS image-based installation is implemented by creating a directory for
+each image on the storage device selected during the install process.
+
+The directory structure of the boot device:
+
+.. code-block:: none
+
+  /
+  /boot
+  /boot/grub
+  /boot/1.2.0-rolling+201810021347
+
+The image directory contains the system kernel, a compressed image of the root
+filesystem for the OS, and a directory for persistent storage, such as
+configuration. On boot, the system will extract the OS image into memory and
+mount the appropriate live-rw sub-directories to provide persistent storage
+system configuration.
+
+This process allows for a system to always boot to a known working state, as
+the OS image is fixed and non-persistent. It also allows for multiple releases
+of VyOS to be installed on the same storage device. The image can be selected
+manually at boot if needed, but the system will otherwise boot the image
+configured to be the default.
+
+.. opcmd:: show system image
+
+   List all available system images which can be bootet on the current system.
+
+   .. code-block:: none
+
+     vyos@vyos:~$ show system image
+     The system currently has the following image(s) installed:
+
+        1: 1.2.0-rolling+201810021347 (default boot)
+        2: 1.2.0-rolling+201810021217
+        3: 1.2.0-rolling+201809252218
+
+
+.. opcmd:: delete system image [image-name]
+
+   Delete no longer needed images from the system. You can specify an optional
+   image name to delete, the image name can be retrieved via a list of available
+   images can be shown using the :opcmd:`show system image`.
+
+   .. code-block:: none
+
+      vyos@vyos:~$ delete system image
+      The following image(s) can be deleted:
+
+         1: 1.3-rolling-201912181733 (default boot) (running image)
+         2: 1.3-rolling-201912180242
+         3: 1.2.2
+         4: 1.2.1
+
+      Select the image to delete: 2
+
+      Are you sure you want to delete the
+      "1.3-rolling-201912180242" image? (Yes/No) [No]: y
+      Deleting the "1.3-rolling-201912180242" image...
+      Done
+
+.. opcmd:: show version
+
+   Show current system image version.
+
+   .. code-block:: none
+
+      vyos@vyos:~$ show version
+      Version:          VyOS 1.3-rolling-201912181733
+      Built by:         autobuild@vyos.net
+      Built on:         Wed 18 Dec 2019 17:33 UTC
+      Build UUID:       bccde2c3-261c-49cc-b421-9b257204e06c
+      Build Commit ID:  f7ce0d8a692f2d
+
+      Architecture:     x86_64
+      Boot via:         installed image
+      System type:      bare metal
+
+      Hardware vendor:  VMware, Inc.
+      Hardware model:   VMware Virtual Platform
+      Hardware S/N:     VMware-42 1d 83 b9 fe c1 bd b2-7d 3d 49 db 94 18 f5 c9
+      Hardware UUID:    b9831d42-c1fe-b2bd-7d3d-49db9418f5c9
+
+      Copyright:        VyOS maintainers and contributors
+
+
+
+
+
+System rollback
+===============
+
+If you need to rollback to a previous image, you can easily do so. First
+check the available images through the :opcmd:`show system image`
+command and then select your image with the following command:
+
+.. opcmd:: set system image default-boot [image-name]
+
+   Select the default boot image which will be started on the next boot
+   of the system.
+
+Then reboot the system.
+
+.. note:: VyOS automatically associates the configuration to the image,
+   so you don't need to worry about that. Each image has a unique copy
+   of its configuration.
+
+If you have access to the console, there is a another way to select
+your booting image: reboot and use the GRUB menu at startup.