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