Talk:Proxmox Linux Container
Latest comment: 15 July by Vater in topic best (and easiest) way to get a "default" (working) shell in a pve ct after entering (pct enter)
NixOS container (LXC) on Proxmox Virtual Environment 7
| WUI | CLI | Reference | |
|---|---|---|---|
| find the (a current) NixOS template |
for example for 21.05
| ||
| download the NixOS template |
|
going to the folder where all the templates for Promox Virtual Environment are stored
downloading the NixOS template file (optional you should) move the downloaded NixOS template file to a nicer (more individual) file name
(optional you can) going back
| |
| create a (first) new NixOS container with Proxmox Virtual Environment |
/dev/rbd0 Creating filesystem with 2097152 4k blocks and 524288 inodes Filesystem UUID: 3f4cf224-8062-4cd3-918c-49f891af1aa1 Superblock backups stored on blocks: 32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632 extracting archive '/mnt/pve/cephfs/template/cache/nixos-21.05_2021-10-10.tar.xz' Total bytes read: 836218880 (798MiB, 21MiB/s) Architecture detection failed: open '/bin/sh' failed: No such file or directory Falling back to amd64. Use `pct set VMID --arch ARCH` to change. /etc/os-release file not found and autodetection failed, falling back to 'unmanaged' TASK OK (optional you can) check the (pve) lxc config file (and it should look like something like the following)
arch: amd64 cores: 1 features: nesting=1 hostname: CT1000 memory: 512 net0: name=eth0,bridge=vmbr0,firewall=1,hwaddr=FE:1E:11:E6:D2:8F,ip=dhcp,type=veth ostype: unmanaged rootfs: storage:vm-1000-disk-0,size=8G swap: 512 unprivileged: 1 |
(optional you can) check the (pve) lxc config file (and it should look like something like the following)
arch: amd64 features: nesting=1 hostname: CT1000 memory: 512 net0: name=eth0,bridge=vmbr0,firewall=1,hwaddr=1E:D8:FE:E9:F1:71,ip=dhcp,type=veth ostype: unmanaged rootfs: storage:vm-1000-disk-0,size=4G swap: 512 unprivileged: 1 | |
| (configure the available (virtual) network device for the Proxmox Virtual Environment container) |
| ||
| customize the (pve) lxc startup setup routine (on every node where you want to start a NixOS container) |
run_buffer: 316 Script exited with status 1 lxc_init: 816 Failed to run lxc.hook.pre-start for container "1000" __lxc_start: 2007 Failed to initialize container "1000" TASK ERROR: startup for container '1000' failed
sub unified_cgroupv2_support {
my ($self) = @_;
return if !$self->{plugin}; # unmanaged
$self->protected_call(sub { $self->{plugin}->unified_cgroupv2_support() });
}
(after fixing all the other stuff) WARN: old systemd (< v232) detected, container won't run in a pure cgroupv2 environment! Please see documentation -> container -> cgroup version. TASK WARNINGS: 1 |
||
| customize the individual Proxmox Virtual Environment container configuration for NixOS |
sync_wait: 36 An error occurred in another process (expected sequence number 7) TASK ERROR: startup for container '1000' failed |
sync_wait: 36 An error occurred in another process (expected sequence number 7) __lxc_start: 2073 Failed to spawn container "1000" TASK ERROR: startup for container '1000' failed editing the specific (pve) lxc config file (to a option for lxc.init.cmd)
lxc.init.cmd: /init | |
| (activate nesting for NixOS in the Proxmox Virtual Environment container) |
NixOS is using "Sandboxing" by default.[1] Therefore the option if nesting is not acitivated (try to) update (download and build) Nix expressions (
unpacking channels... warning: Nix search path entry '/nix/var/nix/profiles/per-user/root/channels' does not exist, ignoring error: while setting up the build environment: mounting /proc: Operation not permitted error: program '/nix/store/rphxpqbsxgmykf8nyyr0pqi53nm78xa5-nix-2.3.15/bin/nix-env' failed with exit code 1 (try to) rebuild NixOS
warning: Nix search path entry '/nix/var/nix/profiles/per-user/root/channels/nixos' does not exist, ignoring warning: Nix search path entry '/nix/var/nix/profiles/per-user/root/channels' does not exist, ignoring error: file 'nixpkgs/nixos' was not found in the Nix search path (add it using $NIX_PATH or -I), at (string):1:13 building Nix... warning: Nix search path entry '/nix/var/nix/profiles/per-user/root/channels/nixos' does not exist, ignoring warning: Nix search path entry '/nix/var/nix/profiles/per-user/root/channels' does not exist, ignoring error: file 'nixpkgs/nixos' was not found in the Nix search path (add it using $NIX_PATH or -I) warning: Nix search path entry '/nix/var/nix/profiles/per-user/root/channels/nixos' does not exist, ignoring warning: Nix search path entry '/nix/var/nix/profiles/per-user/root/channels' does not exist, ignoring error: file 'nixpkgs' was not found in the Nix search path (add it using $NIX_PATH or -I) warning: Nix search path entry '/nix/var/nix/profiles/per-user/root/channels/nixos' does not exist, ignoring warning: Nix search path entry '/nix/var/nix/profiles/per-user/root/channels' does not exist, ignoring error: file 'nixpkgs/nixos/modules/installer/tools/nix-fallback-paths.nix' was not found in the Nix search path (add it using $NIX_PATH or -I) /tmp/nixos-rebuild.qaFefR/nix warning: Nix search path entry '/nix/var/nix/profiles/per-user/root/channels/nixos' does not exist, ignoring warning: Nix search path entry '/nix/var/nix/profiles/per-user/root/channels' does not exist, ignoring error: file 'nixpkgs' was not found in the Nix search path (add it using $NIX_PATH or -I) building the system configuration... warning: Nix search path entry '/nix/var/nix/profiles/per-user/root/channels/nixos' does not exist, ignoring warning: Nix search path entry '/nix/var/nix/profiles/per-user/root/channels' does not exist, ignoring error: file 'nixpkgs/nixos' was not found in the Nix search path (add it using $NIX_PATH or -I) if nesting is acitivated update (download and build) Nix expressions (
unpacking channels... warning: Nix search path entry '/nix/var/nix/profiles/per-user/root/channels' does not exist, ignoring created 1 symlinks in user environment
unpacking channels... rebuild NixOS sucessfully
building Nix... building the system configuration... activating the configuration... setting up /etc... setting up tmpfiles how to configure that the option (optional you can) check the (pve) lxc config file (and it should look like something like the following with nesting=1 on the line features:)
features: nesting=1 After changing (adding) the option for | ||
| start the NixOS container with Proxmox Virtual Environment |
|
WARN: old systemd (< v232) detected, container won't run in a pure cgroupv2 environment! Please see documentation -> container -> cgroup version. Task finished with 1 warning(s)!
status: running | |
| having a running NixOS container on Proxmox Virtual Environment | |||
| login into the NixOS container |
<<< Welcome to NixOS 21.05.3740.ce7a1190a0f (x86_64) - pts/0 >>> Log in as "root" with an empty password. nixos login: nixos login: root [root@nixos:~]# |
sh-4.4# sh-4.4# . /etc/profile [root@nixos:/]# | |
| update the channel for NixOS (needed!) |
unpacking channels... created 1 symlinks in user environment | ||
| (optional) test rebuild of NixOS |
(optional) check the default configuration file for NixOS
{ config, pkgs, ... }:
{
imports = [ <nixpkgs/nixos/modules/virtualisation/lxc-container.nix> ];
}
building Nix...
building the system configuration...
activating the configuration...
setting up /etc...
setting up tmpfiles
warning: the following units failed: sys-kernel-debug.mount
● sys-kernel-debug.mount - Kernel Debug File System
Loaded: loaded (/nix/store/n5j5fjn60nhck658j9ab84k8n9z24n1r-systemd-247.6/example/systemd/system/sys-kernel-debug.mount; enabled; vendor preset: enabled)
Active: failed (Result: exit-code) since Mon 2021-10-11 06:48:30 UTC; 265ms ago
Where: /sys/kernel/debug
What: debugfs
Docs: https://www.kernel.org/doc/Documentation/filesystems/debugfs.txt
https://www.freedesktop.org/wiki/Software/systemd/APIFileSystems
IP: 0B in, 0B out
CPU: 2ms
Oct 11 06:48:30 nixos systemd[1]: Mounting Kernel Debug File System...
Oct 11 06:48:30 nixos mount[17997]: mount: /sys/kernel/debug: permission denied.
Oct 11 06:48:30 nixos systemd[1]: sys-kernel-debug.mount: Mount process exited, code=exited, status=32/n/a
Oct 11 06:48:30 nixos systemd[1]: sys-kernel-debug.mount: Failed with result 'exit-code'.
Oct 11 06:48:30 nixos systemd[1]: Failed to mount Kernel Debug File System.
warning: error(s) occurred while switching to the new configuration
| ||
| checking systemd |
UNIT LOAD ACTIVE SUB DESCRIPTION ● sys-kernel-debug.mount loaded failed failed Kernel Debug File System LOAD = Reflects whether the unit definition was properly loaded. ACTIVE = The high-level unit activation state, i.e. generalization of SUB. SUB = The low-level unit activation state, values depend on unit type. 1 loaded units listed. | ||
| fixing the configuration file for NixOS |
{
imports = [ <nixpkgs/nixos/modules/virtualisation/lxc-container.nix> ];
systemd.suppressedSystemUnits = [
"sys-kernel-debug.mount"
];
}
building Nix... building the system configuration... these derivations will be built: /nix/store/4c6mbv3y3i6m9qzv48j0ncy7163x3m7b-system-units.drv /nix/store/nfc7hz3shyrc1jm2nqsgh5m7izcj8psc-etc.drv /nix/store/fmx0v41zcyr7g38qjvdsdk5fifkjxfhx-nixos-system-nixos-21.05.3787.564cb4d81d4.drv building '/nix/store/4c6mbv3y3i6m9qzv48j0ncy7163x3m7b-system-units.drv'... building '/nix/store/nfc7hz3shyrc1jm2nqsgh5m7izcj8psc-etc.drv'... building '/nix/store/fmx0v41zcyr7g38qjvdsdk5fifkjxfhx-nixos-system-nixos-21.05.3787.564cb4d81d4.drv'... activating the configuration... setting up /etc... reloading user units for root... setting up tmpfiles
UNIT LOAD ACTIVE SUB DESCRIPTION 0 loaded units listed. |
https://github.com/NixOS/nixpkgs/issues/9735#issuecomment-783535726 | |
| (optional) test changing the configuration of the NixOS container by installing a package (ddate) and disabling a (default running) service |
{
imports = [ <nixpkgs/nixos/modules/virtualisation/lxc-container.nix> ];
services.openssh.enable = false; environment.systemPackages = with pkgs; [
ddate
];
}
building Nix... building the system configuration...
Today is Prickle-Prickle, the 65th day of Bureaucracy in the YOLD 3187 | ||
| (optional) check status of systemd |
● nixos
State: running
Jobs: 0 queued
Failed: 0 units
Since: Mon 2021-10-11 11:52:39 UTC; 1h 24min ago
CGroup: /
├─user.slice
│ └─user-0.slice
│ ├─session-c1.scope
│ │ ├─393 /nix/store/61z6l8p3f14hgz29j607bg1d37sn5d86-shadow-4.8.1/bin/login --
│ │ ├─506 -bash
│ │ └─527 top
│ └─user@0.service
│ └─init.scope
│ ├─499 /run/current-system/systemd/lib/systemd/systemd --user --deserialize 17
│ └─500 (sd-pam
├─.lxc
│ ├─ 290 /bin/sh
│ ├─3315 systemctl status
│ └─3316 less
├─init.scope
│ └─1 systemd
└─system.slice
├─systemd-journald.service
│ └─200 /nix/store/n5j5fjn60nhck658j9ab84k8n9z24n1r-systemd-247.6/lib/systemd/systemd-journald
├─nix-daemon.service
│ └─473 nix-daemon --daemon
├─console-getty.service
│ └─392 agetty --login-program /nix/store/61z6l8p3f14hgz29j607bg1d37sn5d86-shadow-4.8.1/bin/login --noclear --keep-baud console 115200,38400,9600 linux
├─dhcpcd.service
│ └─468 dhcpcd: [master] [ip4] [ip6]
├─nscd.service
│ └─450 nscd
├─system-container\x2dgetty.slice
│ └─container-getty@1.service
│ └─394 agetty --login-program /nix/store/61z6l8p3f14hgz29j607bg1d37sn5d86-shadow-4.8.1/bin/login --noclear --keep-baud pts/1 115200,38400,9600 vt220
├─dbus.service
│ └─390 /nix/store/qxpxg30bmj99rvvsacqzkgayzvxz6bb1-dbus-1.12.20/bin/dbus-daemon --system --address=systemd: --nofork --nopidfile --systemd-activation --syslog-only
└─systemd-logind.service
└─364 /nix/store/n5j5fjn60nhck658j9ab84k8n9z24n1r-systemd-247.6/lib/systemd/systemd-logind
| ||
| … | |||
Is there a need for non unprivileged NixOS containers?
- Is there a scenario where you would like to have a privileged (
unprivileged = 0) container? - I do not know.
Is there a cgroup2 only NixOS container?
- Is there a configuration with cgroups versions 2 only - where cgroups version 1 is not needed - (so that is possible to rollback the manipulation of the pve lxc startup script (
/usr/share/perl5/PVE/LXC/Setup.pm))? Or can we create such a (pre)build image (tar)? - I do not know.
grep cgroup /proc/filesystems
nodev cgroup nodev cgroup2
- Notes
https://linuxcontainers.org/lxc/manpages//man5/lxc.container.conf.5.html
(pve) lxc configuration option lxc.cgroup2.devices.allow: a
(pve) lxc configuration option lxc.cgroup.devices.deny = a
https://wiki.debian.org/LXC/CGroupV2
https://search.nixos.org/options?channel=unstable&from=0&query=cgroup
nano /etc/nixos/configuration.nix
systemd.enableUnifiedCgroupHierarchy = true;
Why there is a Service section in the service manager configuration in a NixOS container?
starting systemd... /etc/systemd/system.conf:13: Unknown section 'Service'. Ignoring.
/etc/systemd/system.conf
[Service] ProtectProc=default ProtectControlGroups=no ProtectKernelTunables=no
documentation
proxmox
- https://pve.proxmox.com/pve-docs/
- https://pve.proxmox.com/wiki/Linux_Container
- https://pve.proxmox.com/wiki/Unprivileged_LXC_containers
lxc
- …
debian
- …
linux
- …
articles
- https://blog.xirion.net/posts/nixos-proxmox-lxc/
- with
- (PVE 6.3?)
- (NixOS 21.05?)
upgrade (a PCT) to 21.11
the folder /sbin/ is missing
in your NixOS PCT
nix-channel --add https://nixos.org/channels/nixos-21.11 nixos
nixos-rebuild switch --upgrade
ln: failed to create symbolic link '/sbin/init': No such file or directory Activation script snippet 'installInitScript' failed (1)
warning: error(s) occurred while switching to the new configuration
mkdir /sbin
nixos-rebuild switch --upgrade
on your PVE host
(for all the following starts of your NixOS PCT)
nano /etc/pve/lxc/1001.conf
#lxc.init.cmd: /init lxc.init.cmd: /sbin/init
best (and easiest) way to get a "default" (working) shell in a pve ct after entering (pct enter)
source /etc/set-environment
- or
/bin/sh -l
- or
sh -l
- or
. /etc/profile
or is possible to set an option in nixos or pve?