T7397: add "system kernel option quiet" to suppress boot messages

[c-po]

Change summary

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

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Code style update (formatting, renaming)
• Refactoring (no functional changes)
• Migration from an old Vyatta component to vyos-1x, please link to related PR inside obsoleted component
• Other (please describe):

Related Task(s)

• https://vyos.dev/T7397

Related PR(s)

• T7397: add "system kernel option quiet" to suppress boot messages vyos-documentation#1632

How to test / Smoketest result

[email protected]:~$ /usr/libexec/vyos/tests/smoke/cli/test_system_option.py
test_ctrl_alt_delete (__main__.TestSystemOption.test_ctrl_alt_delete) ... ok
test_kernel_options (__main__.TestSystemOption.test_kernel_options) ... ok
test_performance (__main__.TestSystemOption.test_performance) ... ok
test_reboot_on_panic (__main__.TestSystemOption.test_reboot_on_panic) ... ok
test_ssh_client_options (__main__.TestSystemOption.test_ssh_client_options) ... ok

----------------------------------------------------------------------
Ran 5 tests in 15.926s

OK

[email protected]:~$ /usr/libexec/vyos/tests/smoke/system/test_kernel_options.py
test_amd_pstate (__main__.TestKernelModules.test_amd_pstate) ... ok
test_bond_interface (__main__.TestKernelModules.test_bond_interface) ... ok
test_bridge_interface (__main__.TestKernelModules.test_bridge_interface) ... ok
test_container_cgroup_support (__main__.TestKernelModules.test_container_cgroup_support) ... ok
test_container_cpu (__main__.TestKernelModules.test_container_cpu) ... ok
test_dropmon_enabled (__main__.TestKernelModules.test_dropmon_enabled) ... ok
test_ip_routing_support (__main__.TestKernelModules.test_ip_routing_support) ... ok
test_psample_enabled (__main__.TestKernelModules.test_psample_enabled) ... ok
test_qemu_support (__main__.TestKernelModules.test_qemu_support) ... ok
test_synproxy_enabled (__main__.TestKernelModules.test_synproxy_enabled) ... ok
test_vfio (__main__.TestKernelModules.test_vfio) ... ok
test_vmware_support (__main__.TestKernelModules.test_vmware_support) ... ok

----------------------------------------------------------------------
Ran 12 tests in 0.012s

OK

Checklist:

• I have read the CONTRIBUTING document
• I have linked this PR to one or more Phabricator Task(s)
• I have run the components SMOKETESTS if applicable
• My commit headlines contain a valid Task id
• My change requires a change to the documentation
• I have updated the documentation accordingly

[github-actions]

👍
No issues in PR Title / Commit Title

[github-actions]

CI integration 👍 passed!

Details

CI logs

• CLI Smoketests (no interfaces) 👍 passed
• CLI Smoketests (interfaces only) 👍 passed
• Config tests 👍 passed
• RAID1 tests 👍 passed
• TPM tests 👍 passed

[sever-sever]

Adds boot option quiet. Looks safe enough and smoketest updated.

[dmbaturin]

I don't know how many people still use hardware where it would make a difference to the boot time, but the change is certainly not harmful, so I have nothing against it.