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Fix typos and mistakes in the commands and comments
No functional changes
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If any part of the system boot fails, we set overall_status=1 in the vyos-router
startup script. When an error during the image upgrade is detected, the system
will automatically revert the default boot image to the previously used version,
if the CLI option "system option reboot-on-upgrade-failure" is set.
The user is informed via console messages:
Booting failed, reverting to previous image
Automatic reboot in 5 minutes
Use "reboot cancel" to cancel
The user has time to log in and run reboot cancel to remain in the faulty image
for troubleshooting. Reboot timeout is defined by CLI: "system option
reboot-on-upgrade-failure"
Once the system boots into the previous image, the MOTD will display a
persistent warning message - cleared during next reboot.
WARNING: Image update to "VyOS 1.5.xxxx" failed
Please check the logs:
/usr/lib/live/mount/persistence/boot/NAME/rw/var/log
Message is cleared on next reboot!
Upgrade failure can be synthetically injected by booting with Kernel command
line option: vyos-fail-migration
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Add kernel options which apply during the boot:
- isolcpus
- nohz_full
- rcu_nocbs
- default_hugepagesz
- hugepages
- hugepagesz
- numa_balancing
- hpet
- mce
- nosoftlockup
- nmi_watchdog
CLI:
```
set system option kernel cpu disable-nmi-watchdog
set system option kernel cpu isolate-cpus '1,2,4-5'
set system option kernel cpu nohz-full '1,2,4-5'
set system option kernel cpu rcu-no-cbs '1,2,4-5'
set system option kernel disable-hpet
set system option kernel disable-mce
set system option kernel disable-softlockup
set system option kernel memory default-hugepage-size '2M'
set system option kernel memory disable-numa-balancing
set system option kernel memory hugepage-size 1G hugepage-count '2'
set system option kernel memory hugepage-size 2M hugepage-count '512'
```
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Add option to limit the number of messages that are displayed on the console
during the boot process and to persist this setting with image upgrades.
set system option kernel quiet
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set system option keyboard-layout it
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Lower available CPU C states to a minimum if this option set. This will set
Kernel commandline options "intel_idle.max_cstate=0 processor.max_cstate=1".
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We will use _ as CLI level divider. The XML definition filename and also
the Python helper should match the CLI node.
Example:
set interfaces ethernet -> interfaces_ethernet.xml.in
set interfaces bond -> interfaces_bond.xml.in
set service dhcp-server -> service_dhcp-server-xml.in
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