Setting system options

xordspar0 · May 21, 2019, 10:31pm

The timer string format link isn’t getting rendered properly, though I can’t see why. When it’s converted to HTML, it’s generated as an anchor tag with no href property.

xordspar0 · May 21, 2019, 10:33pm

Oh, I see the problem. The URL is missing a / at the beginning.

jlosito · October 24, 2019, 2:13pm

With sudo snap unset system proxy.https?

robertliu · January 20, 2021, 2:31am

There’s a new option to set the console log level.

system.kernel.printk.console-loglevel

Override the console log level which is a number between 0 and 7.
The configuration will be stored in /etc/sysctl.d/99-snapd.conf and the default value is 4

Available since snapd 2.46.

Example to set the log level to 1:

$ snap set system system.kernel.printk.console-loglevel=1
$ cat /etc/sysctl.d/99-snapd.conf 
kernel.printk = 1 4 1 7

degville · January 20, 2021, 12:40pm

Thanks so much for letting us know, and for the written description. I’ve updated the doc with your details.

rpjday · January 15, 2022, 8:26pm

Right after the “snap get system” example in the first section, I would add the variation of “snap get -d system”.

tobias · February 2, 2022, 2:15pm

ping @degville: option swap.size seems to be undocumented Relevant forum post: Snap refresh after system time is corrected - #5 by ijohnson

degville · February 3, 2022, 6:51pm

Excellent! Thanks for letting me know. Doc is now updated and I’ll copy this across to the Ubuntu Core docs too.

picchietti · April 29, 2022, 1:29am

The link changed to here: https://www.raspberrypi.com/documentation/computers/config_txt.html

degville · May 3, 2022, 8:31am

Thanks so much for letting us know, and for including the new link!

rpjday · April 22, 2023, 12:28pm

I think it’s worth mentioning that “snap get system” and “snap get core” are synonymous – I filed a bug for that:

rpjday · April 22, 2023, 6:42pm

Another note – while the “experimental” system option still exists, it’s moved on considerably from the example(s) presented on this page.

github.com

snapcore/snapd/blob/master/overlord/configstate/configcore/early_test.go

// -*- Mode: Go; indent-tabs-mode: t -*-
//go:build !nomanagers
// +build !nomanagers

/*
 * Copyright (C) 2021 Canonical Ltd
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 3 as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 */

This file has been truncated. show original

github.com

snapcore/snapd/blob/master/overlord/configstate/configcore/experimental_test.go#L77


func (s *experimentalSuite) TestExportedFeatures(c *C) {
	conf := &mockConf{
		state: s.state,
		conf:  map[string]interface{}{featureConf(features.PerUserMountNamespace): true},
	}
	err := configcore.FilesystemOnlyRun(classicDev, conf)
	c.Assert(err, IsNil)
	c.Check(features.PerUserMountNamespace.ControlFile(), testutil.FilePresent)
	delete(conf.changes, "experimental.per-user-mount-namespace")
	err = configcore.FilesystemOnlyRun(classicDev, conf)
	c.Assert(err, IsNil)
	c.Check(features.PerUserMountNamespace.ControlFile(), testutil.FilePresent)
}
func (s *experimentalSuite) TestFilesystemOnlyApply(c *C) {
	conf := configcore.PlainCoreConfig(map[string]interface{}{
		"experimental.refresh-app-awareness": "true",
	})
	tmpDir := c.MkDir()

Not sure if those links are accurate or complete, it would be nice to have a list of what are still considered “experimental” system config options.