The kernel default for `link_power_management_policy` is `"max_performance"`.
This commit:
f169f60575
set the NixOS default to `"min_performance"`.
This issue (https://github.com/NixOS/nixpkgs/issues/11276) details my long
journey to discover this after several file system failures incorrectly
attributed to `TRIM` and `NCQ` settings.
I think we should use the kernel default of `"max_performance"` to assure
the best experience for new users with SSDs and to conform to the defaults of
the kernel and other distros.
The three KDE package sets now have circular dependencies between them,
so they can only be built if they are merged into a single package set
during evaluation.
- if xserver.tty and/or display are set to null, then don't specify
them, or the -logfile argument in the xserverArgs
- For lightdm, we set default tty and display to null and we determine
those at runtime based on arguments passed. This is necessary because
we run multiple X servers so they can't all be on the same display
This reverts commit 02b568414d.
With a5bc11f and 6353f58 in place, we really don't need this anymore.
After running about 500 VM tests on my Hydra, it still didn't improve
very much.
Signed-off-by: aszlig <aszlig@redmoonstudios.org>
As @domenkozar noted in #10828, cache=writeback seems to do more harm
than good:
https://github.com/NixOS/nixpkgs/issues/10828#issuecomment-164426821
He has tested it using the openstack NixOS tests and found that
cache=none significantly improves startup performance.
Signed-off-by: aszlig <aszlig@redmoonstudios.org>
This seems to be the root cause of the random page allocation failures
and @wizeman did a very good job on not only finding the root problem
but also giving a detailed explanation of it in #10828.
Here is an excerpt:
The problem here is that the kernel is trying to allocate a contiguous
section of 2^7=128 pages, which is 512 KB. This is way too much:
kernel pages tend to get fragmented over time and kernel developers
often go to great lengths to try allocating at most only 1 contiguous
page at a time whenever they can.
From the error message, it looks like the culprit is unionfs, but this
is misleading: unionfs is the name of the userspace process that was
running when the system ran out of memory, but it wasn't unionfs who
was allocating the memory: it was the kernel; specifically it was the
v9fs_dir_readdir_dotl() function, which is the code for handling the
readdir() function in the 9p filesystem (the filesystem that is used
to share a directory structure between a qemu host and its VM).
If you look at the code, here's what it's doing at the moment it tries
to allocate memory:
buflen = fid->clnt->msize - P9_IOHDRSZ;
rdir = v9fs_alloc_rdir_buf(file, buflen);
If you look into v9fs_alloc_rdir_buf(), you will see that it will try
to allocate a contiguous buffer of memory (using kzalloc(), which is a
wrapper around kmalloc()) of size buflen + 8 bytes or so.
So in reality, this code actually allocates a buffer of size
proportional to fid->clnt->msize. What is this msize? If you follow
the definition of the structures, you will see that it's the
negotiated buffer transfer size between 9p client and 9p server. On
the client side, it can be controlled with the msize mount option.
What this all means is that, the reason for running out of memory is
that the code (which we can't easily change) tries to allocate a
contiguous buffer of size more or less equal to "negotiated 9p
protocol buffer size", which seems to be way too big (in our NixOS
tests, at least).
After that initial finding, @lethalman tested the gnome3 gdm test
without setting the msize parameter at all and it seems to have resolved
the problem.
The reason why I'm committing this without testing against all of the
NixOS VM test is basically that I think we can only go better but not
worse than the current state.
Signed-off-by: aszlig <aszlig@redmoonstudios.org>
- Add new service for `clamd`, the ClamAV daemon.
- Replace the old upstart "jobs" section with systemd.services
- Remove unnecessary config options.
- Use `mkEnableOption`
We hit page allocation failures a lot at random for VM tests, in case of
my own Hydra when it comes to the installer tests. The reason for this
is that once the memory of the VM gets heavily fragmented the kernel is
unable to allocate new pages.
Setting vm.min_free_kbytes to 16MB forces the kernel to keep a minimum
of 16 MB free.
I've done some testing accross repeated runs of the installer tests with
and without vm.min_free_kbytes set. So accross 30 test runs for each
settings, all of the tests with the option being set passed while 14
tests without that sysctl option triggered page allocation failures.
Sure, running 30 tests is not a guarantee that 16MB is enough, but we'll
see how it turns out in the long run across all VM tests.
Signed-off-by: aszlig <aszlig@redmoonstudios.org>
Adds a new service module for shairport-sync. Tested with a local
and remote pulseaudio server. Needs to be run as a user in the pulse group
to access pulseaudio.
These options allow setting the start and stop scripts for the display
manager. Making these configurable is necessary to allow some hardware
configurations. Upstream ships empty scripts by default, anyway.
This new service invokes `simp_le` for a defined set of certs on a regular
basis with a systemd timer. `simp_le` is smart enough to handle account
registration, domain validation and renewal on its own. The only thing
required is an existing HTTP server that serves the path
`/.well-known/acme-challenge` from the webroot cert parameter.
Example:
services.simp_le.certs."foo.example.com" = {
webroot = "/var/www/challenges";
extraDomains = [ "www.example.com" ];
email = "foo@example.com";
validMin = 2592000;
renewInterval = "weekly";
};
Example Nginx vhost:
services.nginx.appendConfig = ''
http {
server {
server_name _;
listen 80;
listen [::]:80;
location /.well-known/acme-challenge {
root /var/www/challenges;
}
location / {
return 301 https://$host$request_uri;
}
}
}
'';
Now the default way to define NixOS window manager modules is to use
mkEnableOption to describe the module itself.
In this commit, all files on nixos/modules/services/x11/window-managers
are changed.
Commit changes default version to 7.0.10, 7.0.5 version is kept for
people reluctant to update. Needed info has also been added for
versions 8.0, 8.1 and 8.2 only the latest minor version of each
major version is included.
This option allows user to specify a url prefix for owncloud.
By default it is set to "" and the document root will be set
to owncloud's dir.
If a prefix is set, e.g. urlPrefix = "/owncloud"
an alias will be created using that prefix to point to owncloud's
dir and owncloud will be available at http://localhost/owncloud
systemd-udev-settle is not started by default anymore.
Because checking for psmouse like that is considered legacy,
we start systemd-udev-settle manually in the test.
cc @edolstra
The advantage of putting the PID file under the ephemeral /run is that
when the machine crashes /run gets cleared allowing graphite to start
once the machine is rebooted.
We also set the PIDFile systemd option so that systemd knows the correct
PID and enables systemd to remove the file after service shut down.
* package statsd node packages separatly since they actually require
nodejs-0.10 or nodejs-0.12 to work (which is ... well old)
* remove statsd packages and its backends from "global" node-packages.json.
i did not rebuild it since for some reason npm2nix command fails. next time
somebody will rerun npm2nix statsd packages are going to be removed.
* statsd service: backends are now provided as strings and not anymore as
packages.
Add the possibility to specify plugin set to
be used as overridable `thunar` derivation argument.
New nixos config attribute:
`services.xserver.desktopManager.xfce.thunarPlugins`
that allows user to specify plugins in the context
of nixos.
Tests:
- With and without plugins.
- Using the nixos attributes.
This module implements a way to start one or more bepasty servers.
It supports configuring the listen address of gunicorn and how bepasty
behaves internally.
Configuring multiple bepasty servers provides a way to serve pastes externally
without authentication and provide creating,listing,deleting pastes interally.
nginx can be used to provide access via hostname + listen address.
`configuration.nix`:
services.bepasty = {
enable = true;
servers = {
internal = {
defaultPermissions = "admin,list,create,read,delete";
secretKey = "secret";
bind = "127.0.0.1:8000";
};
external = {
defaultPermissions = "read";
bind = "127.0.0.1:8001";
secretKey = "another-secret";
};
};
};
Ctrl+Alt+Backspace is usually enabled by default under X, and is a
keyboard shortcut that forcefully kills the current X server. This can
lead to data loss by users if accidentally pressed. This commit
introduces a new option, services.xserver.enableCtrlAltBackspace, that
is *disabled* by default. If set to true, the previous behavior can be
restored.
A similar decision was made by the Ubuntu team, and is documented here:
https://wiki.ubuntu.com/XorgCtrlAltBackspace
Currently only the hardcoded default directories are created, not the
directories that the user may have provided. Fix that.
[Bjørn: fix small typo (%{settingsDir} => ${settingsDir}) and change
commit message.]
Run pam_unix an additional time rather than switching it from sufficient
to required. This fixes a potential security issue for
ecryptfs/pam_mount users as with pam_deny gone, if cfg.unixAuth = False
then it is possible to login without a password.
The idea that the interactive bash prompt isn't set in case of TERM=dumb
is intended to fix problems when other machines log remotely into a
NixOS installation via Tramp. A side-effect that change was, however,
that Emacs' shell-mode no longer had a correct prompt. I suppose the
presence of
INSIDE_EMACS=24.5.2,comint
is a sufficiently unique indication that the current interactive shell
is running inside of an Emacs and that the prompt can thus be configured
safely.
This option allows to define (declarative) Jenkins jobs, using Jenkins
Job Builder (JJB) as backend.
Example:
services.jenkins = {
enable = true;
jobBuilder = {
enable = true;
yamlJobs = ''
- job:
name: jenkins-job-test
builders:
- shell: echo 'Hello world!'
'';
};
};
Jobs can be defined using YAML, JSON and Nix.
Note that it really is declarative configuration; if you remove a
previously defined job, the module will remove the jobdir under
$JENKINS_HOME.
Jobs managed through the Jenkins WebUI (or by other means) are not
touched by this module.
Changes v1 -> v2:
* add nixJobs
* let jsonJobs take a list of strings (allows merge)
* 4 space indent in shell code
Regression introduced by b21fd5d066.
The initialScript is only executed whenever there is a .first-startup in
the dataDir, so silently dropping the file essentially breaks
initialScript functionality.
Signed-off-by: aszlig <aszlig@redmoonstudios.org>
Since commits 89e9837 and 5b8dae8 the manual no longer depends on
evaluation of any packages from nixpkgs, so all errors of the form
"Package 'foo' is not supported on 'armv7l-linux'" are gone.
I needed to add sdhci_acpi and mmc_block to my initrd modules in order to boot
my Chromebook. Looking under /sys/class/mmc_host/*/device/driver/module will
give us the sdhci_acpi dependency.
This makes the firmware available (or would, if someone switched off
enableAllFirmware). Corresponding kernel module should get auto-loaded.
See #9948. Close#9971.
Option aliases/deprecations can now be declared in any NixOS module,
not just in nixos/modules/rename.nix. This is more modular (since it
allows for example grub-related aliases to be declared in the grub
module), and allows aliases outside of NixOS (e.g. in NixOps modules).
The syntax is a bit funky. Ideally we'd have something like:
options = {
foo.bar.newOption = mkOption { ... };
foo.bar.oldOption = mkAliasOption [ "foo" "bar" "newOption" ];
};
but that's not possible because options cannot define values in
*other* options - you need to have a "config" for that. So instead we
have functions that return a *module*: mkRemovedOptionModule,
mkRenamedOptionModule and mkAliasOptionModule. These can be used via
"imports", e.g.
imports = [
(mkAliasOptionModule [ "foo" "bar" "oldOption" ] [ "foo" "bar" "newOption" ]);
];
As an added bonus, deprecation warnings now show the file name of the
offending module.
Fixes#10385.
I doubt that ordering non-sysvinit services after network.target ever
makes sense. In this case, CopyConsole requires DNS lookups and fails
if these are not yet possible.
Synergy seems to get more and more unstable in recent versions, so we
might want to debug this properly. However, it makes sense to restart
the service nevertheless, because synergy is about keyboard and mouse
sharing and it's quite annoying to either SSH in to restart the service
or even needing to unplug the keyboard and plug in into the machine with
the failing service.
Signed-off-by: aszlig <aszlig@redmoonstudios.org>
Trigger a restart of the post-resume.target on resume.
That allows other systemd services to receive the restart signal
after resume by becoming 'partOf' the post-resume.target.
Jenkins gets (by default) an additional environment of
{ NIX_REMOTE = "daemon"; }
This has the following problems:
1. NIX_REMOTE disappears when users specify additional environment
variables, because defaults have low merge priority.
2. nix cannot be used without additional NIX_PATH envvar, which is
currently missing.
3. If you try to use HTTPS, you'll see that jenkins lacks
SSL_CERT_FILE envvar, causing it to fail.
This commit adds config.environment.sessionVariables and NIX_REMOTE to
the set of variables that are always there for jenkins, making nix and
HTTPS work out of the box.
services.jenkins.environment is now empty by default.
Commit 9bfe92ecee ("docker: Minor improvements, fix failing test") added
the services.docker.storageDriver option, made it mandatory but didn't
give it a default value. This results in an ugly traceback when users
enable docker, if they don't pay enough attention to also set the
storageDriver option. (An attempt was made to add an assertion, but it
didn't work, possibly because of how "mkMerge" works.)
The arguments against a default value were that the optimal value
depends on the filesystem on the host. This is, AFAICT, only in part
true. (It seems some backends are filesystem agnostic.) Also, docker
itself uses a default storage driver, "devicemapper", when no
--storage-driver=x options are given. Hence, we use the same value as
default.
Add a FIXME comment that 'devicemapper' breaks NixOS VM tests (for yet
unknown reasons), so we still run those with the 'overlay' driver.
Closes#10100 and #10217.
When using the ZFS storagedriver in docker, it shells out for the ZFS
commands. The path configuration for the systemd task does not include
ZFS, so if the driver is set to ZFS, add ZFS utilities to the PATH.
This will resolve https://github.com/NixOS/nixpkgs/issues/10127
[Bjørn: prefix commit message with "nixos/docker:", remove extra space
before ';']
based on @eldostra feedback:
* remove user and group configuration, because it is probably
unnecessary
* remove libraryDir default
* capitalize and shorten service description
Configuration option for setting up virtual WLAN interfaces.
If the hardware NIC supports it, then multiple virtual WLAN interfaces can be
configured through the options of the new 'networking.wlanInterfaces' module.
For example, the following configuration transforms the device with the persistent
udev name 'wlp6s0' into a managed and a ad hoc device with the device names
'wlan-managed0' and 'wlan-adhoc0', respectively:
networking.wlanInterfaces = {
"wlan-managed0" = {
type = "managed";
device = "wlp6s0";
};
"wlan-adhoc0" = {
type = "ibss";
device = "wlp6s0";
};
};
Internally, a udev rule is created that matches wlp6s0 and runs a script which adds
the missing virtual interfaces and re-configures the wlp6s0 interface accordingly.
Once the new interfaces are created by the Linux kernel, the configuration of the
interfaces is managed by udev and systemd in the usual way.
