.. _configuration-overview: Configuration Overview ====================== VyOS makes use of a unified configuration file for all system configuration: `config.boot`. This allows for easy template creation, backup, and replication of system configuration. The current configuration can be viewed using the show configuration command. .. code-block:: sh vyos@vyos:~$ show configuration interfaces { ethernet eth0 { address dhcp hw-id 00:0c:29:44:3b:0f } loopback lo { } } service { ssh { port 22 } } system { config-management { commit-revisions 20 } console { device ttyS0 { speed 9600 } } login { user vyos { authentication { encrypted-password **************** } level admin } } ntp { server 0.pool.ntp.org { } server 1.pool.ntp.org { } server 2.pool.ntp.org { } } syslog { global { facility all { level notice } facility protocols { level debug } } } } vyos@vyos:~$ By default the configuration is display'ed in a hierarchy like the example above, this is only one of the possible ways to display the configuration. When the configuration is generated and the device is configured, these changes are added with a corresponding set of `set` and `delete` commands, as for this you could also display the current configuration using these `set` commands using the `show configuration commands` command. .. code-block:: sh vyos@vyos:~$ show configuration commands set interfaces ethernet eth0 address 'dhcp' set interfaces ethernet eth0 hw-id '00:0c:29:44:3b:0f' set interfaces loopback 'lo' set service ssh port '22' set system config-management commit-revisions '20' set system console device ttyS0 speed '9600' set system login user vyos authentication encrypted-password '' set system login user vyos level 'admin' set system ntp server '0.pool.ntp.org' set system ntp server '1.pool.ntp.org' set system ntp server '2.pool.ntp.org' set system syslog global facility all level 'notice' set system syslog global facility protocols level 'debug' vyos@vyos:~$ Both these commands are for beeing executed when in operational mode, these commands does not work within the configuration mode. Navigating in Configuration Mode --------------------------------- When entering the configuration mode you are navigating inside the tree structure exported in the overview above, to enter configuration mode enter the command `configure` when in operational mode .. code-block:: sh vyos@vyos$ configure [edit] cyos@vyos# .. note:: Prompt changes from `$` to `#`. To exit configuration mode, type `exit`. All commands executed here is relative to the configuration level you have entered, everything is possible to do from the top level but commands will be quite lengthy when manually typing them. To change the current hierarchy level use the command: `edit` .. code-block:: sh [edit] vyos@vyos# edit interfaces ethernet eth0 [edit interfaces ethernet eth0] vyos@vyos# You are now in a sublevel relative to `interfaces ethernet eth0`, all commands executed from this point on are relative to this sublevel. to exit back to the top of the hierarchy use the `top` command or the `exit` command. This brings you back to the top of the hierarchy. The show command within configuration mode will show the current configuration indicating line changes with a + for additions and a - for deletions. .. code-block:: sh vyos@vyos:~$ configure [edit] vyos@vyos# show interfaces ethernet eth0 { address dhcp hw-id 00:0c:29:44:3b:0f } loopback lo { } [edit] vyos@vyos# set interfaces ethernet eth0 description 'OUTSIDE' [edit] vyos@vyos# show interfaces ethernet eth0 { address dhcp + description OUTSIDE hw-id 00:0c:29:44:3b:0f } loopback lo { } [edit] vyos@vyos# it is also possible to display all `set` commands within configuration mode using `show | commands` .. code-block:: sh vyos@vyos# show interfaces iethernet eth0 | commands set address dhcp set hw-id 00:0c:29:44:3b:0f these command is also relative to the level you are inside and only relevant configuration blocks will be displayed when entering a sub-level .. code-block:: sh [edit interfaces ethernet eth0] vyos@vyos# show address dhcp hw-id 00:0c:29:44:3b:0f exiting from the configuration mode is done via the `exit` command from the top level, executing `exit` from within a sub-level takes you back to the top level. .. code-block:: sh [edit interfaces ethernet eth0] vyos@vyos# exit [edit] vyos@vyos# exit Warning: configuration changes have not been saved. vyos@vyos:~$ Managing the configuration -------------------------- The configuration is managed by the use of `set` and `delete` commands from within configuration mode Configuration commands are flattend from the tree into 'one-liner' commands shown in `show configuration commands` from operation mode these commands are also relative to the level where they are executed and all redundant information from the current level is removed from the command entered .. code-block:: sh [edit] vyos@vyos# set interface ethernet eth0 address 1.2.3.4/24 [edit interfaces ethernet eth0] vyos@vyos# set address 1.2.3.4/24 These two commands are essential the same, just executed from different levels in the hierarchy To delete a configuration entry use the `delete` command, this also deletes all sub-levels under the current level you've specified in the `delete` command. Deleting a entry could also mean to reset it back to its default value if the element is mandatory, in each case it will be removed from the configuration file .. code-block:: sh [edit interfaces ethernet eth0] vyos@vyos# delete address 1.2.3.4/24 Configuration changes made do not take effect until committed using the commit command in configuration mode. .. code-block:: sh vyos@vyos# commit [edit] vyos@vyos# exit Warning: configuration changes have not been saved. vyos@vyos:~$ In order to preserve configuration changes upon reboot, the configuration must also be saved once applied. This is done using the save command in configuration mode. .. code-block:: sh vyos@vyos# save Saving configuration to '/config/config.boot'... Done [edit] vyos@vyos# Configuration mode can not be exited while uncommitted changes exist. To exit configuration mode without applying changes, the exit discard command can be used. .. code-block:: sh vyos@vyos# exit Cannot exit: configuration modified. Use 'exit discard' to discard the changes and exit. [edit] vyos@vyos# exit discard exit vyos@vyos:~$ VyOS also maintains backups of previous configurations. To compare configuration revisions in configuration mode, use the compare command: .. code-block:: sh vyos@vyos# compare [tab] Possible completions: Compare working & active configurations saved Compare working & saved configurations Compare working with revision N Compare revision N with M Revisions: 0 2013-12-17 20:01:37 root by boot-config-loader 1 2013-12-13 15:59:31 root by boot-config-loader 2 2013-12-12 21:56:22 vyos by cli 3 2013-12-12 21:55:11 vyos by cli 4 2013-12-12 21:27:54 vyos by cli 5 2013-12-12 21:23:29 vyos by cli 6 2013-12-12 21:13:59 root by boot-config-loader 7 2013-12-12 16:25:19 vyos by cli 8 2013-12-12 15:44:36 vyos by cli 9 2013-12-12 15:42:07 root by boot-config-loader 10 2013-12-12 15:42:06 root by init [edit] vyos@vyos# You can rollback configuration using the rollback command, however this command will currently trigger a system reboot. .. code-block:: sh vyos@vyos# compare 1 [edit system] >host-name vyos-1 [edit] vyos@vyos# rollback 1 Proceed with reboot? [confirm][y] Broadcast message from root@vyos-1 (pts/0) (Tue Dec 17 21:07:45 2013): The system is going down for reboot NOW! [edit] vyos@vyos# VyOS also supports saving and loading configuration remotely using SCP, FTP, or TFTP. .. code-block:: sh vyos@vyos# save [tab] Possible completions: Save to system config file Save to file on local machine scp://:@/ Save to file on remote machine ftp://:@/ Save to file on remote machine tftp:/// Save to file on remote machine vyos@vyos# save tftp://192.168.0.100/vyos-test.config.boot Saving configuration to 'tftp://192.168.0.100/vyos-test.config.boot'... ######################################################################## 100.0% Done Operational info from config mode --------------------------------- When inside configuration mode you are not directly able to execute operational commands, access to these commands are possible trough the use of the `run [command]` command. from this command you will have access to everything accessable from operational mode, Command completeion and syntax help with `?` and `[tab]` wil also work. .. code-block:: sh [edit] vyos@vyos# run show interfaces Codes: S - State, L - Link, u - Up, D - Down, A - Admin Down Interface IP Address S/L Description --------- ---------- --- ----------- eth0 0.0.0.0/0 u/u