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bug#37631: service zabbix-server (and zabbix-agent) fails starting (cann
From: |
Giovanni Biscuolo |
Subject: |
bug#37631: service zabbix-server (and zabbix-agent) fails starting (cannot run as root!) |
Date: |
Sat, 05 Oct 2019 12:14:10 +0200 |
Hi Guix,
executive summary: do we really need to start zabbix_server in
foreground mode?
I have a Guix System in which I defined this services (thanks to the
work in guix-maintenance):
--8<---------------cut here---------------start------------->8---
;; For the Zabbix database. It was created by manually
;; following the instructions here:
;;
https://www.zabbix.com/documentation/4.2/manual/appendix/install/db_scripts
(postgresql-service)
;; Monitoring
(service zabbix-agent-service-type)
(service zabbix-server-service-type
(zabbix-server-configuration
(include-files '("/root/secrets/zabbix-server-dbpass"))
(log-type "file")))
(service zabbix-front-end-service-type
(zabbix-front-end-configuration
(nginx (list
(nginx-server-configuration
(root #~(string-append #$zabbix-server:front-end
"/share/zabbix/php"))
(listen '("7878"))
(index '("index.php"))
(locations
(let ((php-location (nginx-php-location)))
(list (nginx-location-configuration
(inherit php-location)
(body (append
(nginx-location-configuration-body php-location)
(list "
fastcgi_param PHP_VALUE \"post_max_size = 16M
max_execution_time = 300\";
"))))))))))
(db-secret-file
"/root/secrets/zabbix-front-end-dbpass"))))
--8<---------------cut here---------------end--------------->8---
The zabbix frontend service is running well but the zabbix-server
refuses to start
--8<---------------cut here---------------start------------->8---
$ herd start zabbix-server
Service zabbix-server could not be started.
herd: failed to start service zabbix-server
--8<---------------cut here---------------end--------------->8---
looking in the current system profile (built with a guix master branch
on 27 Sept)
--8<---------------cut here---------------start------------->8---
Generation 12 Sep 27 2019 21:18:26 (current)
file name: /var/guix/profiles/system-12-link
canonical file name: /gnu/store/h03qdv70sgndclgp04dpkka4rqlk9fg3-system
label: GNU with Linux-Libre 5.2.17
bootloader: grub
root device: UUID: 9862e534-946d-4323-b7ce-9937661bdb7d
kernel: /gnu/store/bjs8k11phqhn39n7cs1wix5x147fwhnn-linux-libre-5.2.17/bzImage
--8<---------------cut here---------------end--------------->8---
I found the shepherd uses
/gnu/store/lm1d60d0kra3z86hcjmav828cfxjcgi8-shepherd-zabbix-server.scm
with this (partial) parameters:
--8<---------------cut here---------------start------------->8---
#:start (make-forkexec-constructor (list
"/gnu/store/qcm5j0wk8rs6ykn6b10vg8awf2v6kvx1-zabbix-server-4.2.0/sbin/zabbix_server"
"--config" "/gnu/store/w1vgvlbzs3jks014r5dra7ih6g7r26n7-zabbix_server.conf"
"--foreground") #:user "zabbix" #:group "zabbix" #:pid-file
"/var/run/zabbix/zabbix_server.pid"
--8<---------------cut here---------------end--------------->8---
and if I try to start it from the command line:
--8<---------------cut here---------------start------------->8---
/gnu/store/qcm5j0wk8rs6ykn6b10vg8awf2v6kvx1-zabbix-server-4.2.0/sbin/zabbix_server
--config /gnu/store/w1vgvlbzs3jks014r5dra7ih6g7r26n7-zabbix_server.conf
--foreground
--8<---------------cut here---------------end--------------->8---
I get:
--8<---------------cut here---------------start------------->8---
zabbix_server [879]: cannot run as root!
--8<---------------cut here---------------end--------------->8---
I had a look in upstream bug reports but was not able to find nothing
strictly related to zabbix_server, but I was able fo find this for
zabbix_agentd https://support.zabbix.com/browse/ZBX-10611 (fixed since
4.2.1rc1)
actually if I start zabbix_server without ``--foreground'' the server
starts without problems
I thought upgrading to the last stable release of zabbix was the
solution, so I submitted a patch (bug#37629) to upgrade to 4.2.7 and now
I'm using a custom channel with that patch applied:
--8<---------------cut here---------------start------------->8---
(list (channel
(name 'guix)
(url "https://gitlab.com/gbiscuolo/guix.git")
(branch "wip-zabbix-update")))
--8<---------------cut here---------------end--------------->8---
but if I switch to my last system generation (built with the above channel):
--8<---------------cut here---------------start------------->8---
Generation 13 Oct 05 2019 10:24:28
file name: /var/guix/profiles/system-13-link
canonical file name: /gnu/store/bmmjbk6sidqjahq0i53mgp38b342lnda-system
label: GNU with Linux-Libre 5.3.2
bootloader: grub
root device: UUID: 9862e534-946d-4323-b7ce-9937661bdb7d
kernel: /gnu/store/b28yv4dww1fha0hdhxibfg0k1f50sy0f-linux-libre-5.3.2/bzImage
--8<---------------cut here---------------end--------------->8---
and reboot...
--8<---------------cut here---------------start------------->8---
$ sudo herd status zabbix-server
Status of zabbix-server:
It is stopped.
It is enabled.
Provides (zabbix-server).
Requires ().
Conflicts with ().
Will be respawned.
--8<---------------cut here---------------end--------------->8---
this time if I start zabbix_server from the command line:
--8<---------------cut here---------------start------------->8---
$
/gnu/store/94w5smlc86xac7v1vz4wbqkq43b2fia8-zabbix-server-4.2.7/sbin/zabbix_server
--config /gnu/store/w1vgvlbzs3jks014r5dra7ih6g7r26n7-zabbix_server.conf
--foreground
Starting Zabbix Server. Zabbix 4.2.7 (revision 624fb7497b).
Press Ctrl+C to exit.
--8<---------------cut here---------------end--------------->8---
the server starts but the console remains open (as expected by using of
foreground) and if I press Ctrl+C obviously the server is terminated
AFAIU the foreground process never exits and shepherd times it out:
right?
the same thing **almost** apply to zabbix-agent that is also
started with "--foregroud": it is started by shepherd, the console gets
busy (so I cannot login for exemple) but if I press Ctrl+C the process
keeps running
--8<---------------cut here---------------start------------->8---
$ sudo herd status zabbix-agent
Status of zabbix-agent:
It is started.
Running value is 277.
It is enabled.
Provides (zabbix-agent).
Requires ().
Conflicts with ().
Will be respawned.
--8<---------------cut here---------------end--------------->8---
strange behaviour
anyway back to the question: do we need to start zabbix_server and
zabbix_agentd in foreground?
Thanks! Gio'
--
Giovanni Biscuolo
Xelera IT Infrastructures
- bug#37631: service zabbix-server (and zabbix-agent) fails starting (cannot run as root!),
Giovanni Biscuolo <=