Hey all,
After upgrading to CentOS 7.2, non of my servers run systemd-sysctl on boot. So far, I tried running manually /usr/lib/systemd/systemd-sysctl, it runs smoothly and updates all the parameters. I also ran sysctl --system, which also executes successfully.
I checked within systemd, and systemd-sysctl is wanted by the sysinit.target which is wanted by the multi-user.target - the one I boot into.
I can't find anything by doing journalctl | grep sysctl Or by looking through /var/log/messages (I run rsyslog as well).
Any idea's ?
Thanks
On 12/22/2015 06:56 AM, Ofer Hasson wrote:
After upgrading to CentOS 7.2, non of my servers run systemd-sysctl on boot.
Works here... # systemctl status systemd-sysctl ● systemd-sysctl.service - Apply Kernel Variables Loaded: loaded (/usr/lib/systemd/system/systemd-sysctl.service; static; vendor preset: disabled) Active: active (exited) since Wed 2015-12-16 20:19:10 PST; 6 days ago Docs: man:systemd-sysctl.service(8) man:sysctl.d(5) Process: 652 ExecStart=/usr/lib/systemd/systemd-sysctl (code=exited, status=0/SUCCESS) Main PID: 652 (code=exited, status=0/SUCCESS) CGroup: /system.slice/systemd-sysctl.service
You are correct, I'll refine my problem,
By running "systemctl status systemd-sysctl" I also receive the same output, but a simple "cat /proc/sys/vm/swappiness" returns the default value, and not the one set by my conf file. But, if I run "/usr/lib/systemd/systemd-sysctl" the "cat /proc/sys/vm/swappiness" does return the correct value.
Any idea ? Does this happen to anyone else ?
On Wed, Dec 23, 2015 at 11:12 AM, Gordon Messmer gordon.messmer@gmail.com wrote:
On 12/22/2015 06:56 AM, Ofer Hasson wrote:
After upgrading to CentOS 7.2, non of my servers run systemd-sysctl on boot.
Works here... # systemctl status systemd-sysctl ● systemd-sysctl.service - Apply Kernel Variables Loaded: loaded (/usr/lib/systemd/system/systemd-sysctl.service; static; vendor preset: disabled) Active: active (exited) since Wed 2015-12-16 20:19:10 PST; 6 days ago Docs: man:systemd-sysctl.service(8) man:sysctl.d(5) Process: 652 ExecStart=/usr/lib/systemd/systemd-sysctl (code=exited, status=0/SUCCESS) Main PID: 652 (code=exited, status=0/SUCCESS) CGroup: /system.slice/systemd-sysctl.service
CentOS mailing list CentOS@centos.org https://lists.centos.org/mailman/listinfo/centos
On 12/23/2015 05:08 AM, Ofer Hasson wrote:
By running "systemctl status systemd-sysctl" I also receive the same output, but a simple "cat /proc/sys/vm/swappiness" returns the default value, and not the one set by my conf file.
All of mine, as set by files in /etc/sysctl.d/, are correct after boot. Where is your conf file?
also in /etc/sysctl.d/
On Thu, Dec 24, 2015 at 8:58 AM, Gordon Messmer gordon.messmer@gmail.com wrote:
On 12/23/2015 05:08 AM, Ofer Hasson wrote:
By running "systemctl status systemd-sysctl" I also receive the same output, but a simple "cat /proc/sys/vm/swappiness" returns the default value, and not the one set by my conf file.
All of mine, as set by files in /etc/sysctl.d/, are correct after boot. Where is your conf file?
CentOS mailing list CentOS@centos.org https://lists.centos.org/mailman/listinfo/centos
Added some info from the my system:
[root@web-devel-local-1 ~]# uname -a Linux web-devel-local-1.in.parkam-ip.com 3.10.0-327.3.1.el7.x86_64 #1 SMP Wed Dec 9 14:09:15 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux
[root@web-devel-local-1 ~]# cat /etc/sysctl.d/sysctl.conf # System default settings live in /usr/lib/sysctl.d/00-system.conf. # To override those settings, enter new settings here, or in an /etc/sysctl.d/<name>.conf file # # For more information, see sysctl.conf(5) and sysctl.d(5). net.ipv4.ip_forward = 0 kernel.panic = 20 kernel.sem = 250 65000 32 256 vm.swappiness = 10 net.ipv4.conf.all.log_martians = 1 kernel.dmesg_restrict = 1 vm.dirty_ratio = 15 net.ipv6.conf.default.disable_ipv6 = 1 net.ipv4.tcp_syncookies = 1 net.ipv6.conf.all.disable_ipv6 = 1 kernel.kptr_restrict = 1
[root@web-devel-local-1 ~]# systemctl status systemd-sysctl ● systemd-sysctl.service - Apply Kernel Variables Loaded: loaded (/usr/lib/systemd/system/systemd-sysctl.service; static; vendor preset: disabled) Active: active (exited) since Thu 2015-12-24 09:05:15 IST; 3min 8s ago Docs: man:systemd-sysctl.service(8) man:sysctl.d(5) Process: 488 ExecStart=/usr/lib/systemd/systemd-sysctl (code=exited, status=0/SUCCESS) Main PID: 488 (code=exited, status=0/SUCCESS) CGroup: /system.slice/systemd-sysctl.service
Dec 24 09:05:14 web-devel-local-1.in.parkam-ip.com systemd[1]: Starting Apply Kernel Variables... Dec 24 09:05:15 web-devel-local-1.in.parkam-ip.com systemd[1]: Started Apply Kernel Variables.
[root@web-devel-local-1 ~]# reboot
[root@web-devel-local-1 ~]# cat /proc/sys/vm/swappiness 30
[root@web-devel-local-1 ~]# /usr/lib/systemd/systemd-sysctl [root@web-devel-local-1 ~]# cat /proc/sys/vm/swappiness 10
[root@web-devel-local-1 ~]# cat /usr/lib/systemd/system/systemd-sysctl.service # This file is part of systemd. # # systemd is free software; you can redistribute it and/or modify it # under the terms of the GNU Lesser General Public License as published by # the Free Software Foundation; either version 2.1 of the License, or # (at your option) any later version.
[Unit] Description=Apply Kernel Variables Documentation=man:systemd-sysctl.service(8) man:sysctl.d(5) DefaultDependencies=no Conflicts=shutdown.target After=systemd-readahead-collect.service systemd-readahead-replay.service After=systemd-modules-load.service Before=sysinit.target shutdown.target ConditionPathIsReadWrite=/proc/sys/
[Service] Type=oneshot RemainAfterExit=yes ExecStart=/usr/lib/systemd/systemd-sysctl
On Thu, Dec 24, 2015 at 9:01 AM, Ofer Hasson hassonofer@gmail.com wrote:
also in /etc/sysctl.d/
On Thu, Dec 24, 2015 at 8:58 AM, Gordon Messmer gordon.messmer@gmail.com wrote:
On 12/23/2015 05:08 AM, Ofer Hasson wrote:
By running "systemctl status systemd-sysctl" I also receive the same output, but a simple "cat /proc/sys/vm/swappiness" returns the default value, and not the one set by my conf file.
All of mine, as set by files in /etc/sysctl.d/, are correct after boot. Where is your conf file?
CentOS mailing list CentOS@centos.org https://lists.centos.org/mailman/listinfo/centos
On 12/23/2015 11:12 PM, Ofer Hasson wrote:
[root@web-devel-local-1 ~]# /usr/lib/systemd/systemd-sysctl [root@web-devel-local-1 ~]# cat /proc/sys/vm/swappiness 10
So... you know that it works when you run it from a root shell, but not during boot. Is the file labeled properly? Anything in audit.log?
I don't see anything related in the audit log (I'm using audit2why).
As for labeling: [root@web-devel-local-1 ~]# ll -Z /etc/ | grep sysctl drwxr-xr-x. root root system_u:object_r:etc_t:s0 sysctl.d
[root@web-devel-local-1 ~]# ll -Z /etc/sysctl.d/ -rw-r--r--. root root unconfined_u:object_r:system_conf_t:s0 sysctl.conf
On Thu, Dec 24, 2015 at 10:51 AM, Gordon Messmer gordon.messmer@gmail.com wrote:
On 12/23/2015 11:12 PM, Ofer Hasson wrote:
[root@web-devel-local-1 ~]# /usr/lib/systemd/systemd-sysctl [root@web-devel-local-1 ~]# cat /proc/sys/vm/swappiness 10
So... you know that it works when you run it from a root shell, but not during boot. Is the file labeled properly? Anything in audit.log?
CentOS mailing list CentOS@centos.org https://lists.centos.org/mailman/listinfo/centos
----- Mail original -----
De: "Ofer Hasson" hassonofer@gmail.com À: "centos" centos@centos.org Envoyé: Jeudi 24 Décembre 2015 11:36:00 Objet: Re: [CentOS] systemd-sysctl not running on boot
[root@web-devel-local-1 ~]# ll -Z /etc/ | grep sysctl drwxr-xr-x. root root system_u:object_r:etc_t:s0 sysctl.d
[root@web-devel-local-1 ~]# ll -Z /etc/sysctl.d/ -rw-r--r--. root root unconfined_u:object_r:system_conf_t:s0 sysctl.conf
Is there a relationship with the new symlink created by the upgrade in my servers ?
# ls -l /etc/sysctl.d/ total 0 lrwxrwxrwx. 1 root root 14 23 déc. 18:11 99-sysctl.conf -> ../sysctl.conf
# yum provides /etc/sysctl.d/99-sysctl.conf initscripts-9.49.30-1.el7.x86_64 : The inittab file and the /etc/init.d scripts Dépôt : base Correspondance depuis : Nom de fichier : /etc/sysctl.d/99-sysctl.conf
Sylvain. Pensez ENVIRONNEMENT : n'imprimer que si ncessaire
I dont see any reason this will have anything to do with the issue. In any case, i re-installed the package, had the symlink, moved my definitions to sysctl.conf. still the same....
On Mon, Dec 28, 2015 at 1:17 PM, Sylvain CANOINE < sylvain.canoine@tv5monde.org> wrote:
----- Mail original -----
De: "Ofer Hasson" hassonofer@gmail.com À: "centos" centos@centos.org Envoyé: Jeudi 24 Décembre 2015 11:36:00 Objet: Re: [CentOS] systemd-sysctl not running on boot
[root@web-devel-local-1 ~]# ll -Z /etc/ | grep sysctl drwxr-xr-x. root root system_u:object_r:etc_t:s0 sysctl.d
[root@web-devel-local-1 ~]# ll -Z /etc/sysctl.d/ -rw-r--r--. root root unconfined_u:object_r:system_conf_t:s0 sysctl.conf
Is there a relationship with the new symlink created by the upgrade in my servers ?
# ls -l /etc/sysctl.d/ total 0 lrwxrwxrwx. 1 root root 14 23 déc. 18:11 99-sysctl.conf -> ../sysctl.conf
# yum provides /etc/sysctl.d/99-sysctl.conf initscripts-9.49.30-1.el7.x86_64 : The inittab file and the /etc/init.d scripts Dépôt : base Correspondance depuis : Nom de fichier : /etc/sysctl.d/99-sysctl.conf
Sylvain. Pensez ENVIRONNEMENT : n'imprimer que si ncessaire
CentOS mailing list CentOS@centos.org https://lists.centos.org/mailman/listinfo/centos
On 12/28/2015 01:34 PM, Ofer Hasson wrote:
I dont see any reason this will have anything to do with the issue. In any case, i re-installed the package, had the symlink, moved my definitions to sysctl.conf. still the same....
Baffling. I can't recreate this problem.
If you're interested in debugging further:
# cp /usr/lib/systemd/system/systemd-sysctl.service /etc/systemd/system/ # vi /etc/systemd/system/systemd-sysctl.service
replaced the ExecStart line with: ExecStart=/bin/strace -f -e trace=file -o /var/tmp/sysctl.trace /usr/lib/systemd/systemd-sysctl
# reboot
/var/tmp/sysctl.trace should tell you whether or not the files are being opened. Beyond that, my only guess would be that some other service is restoring the defaults, but I have no idea what might do that.
-
Gordon Messmer -
Ofer Hasson -
Sylvain CANOINE