[systemd-devel] Timeout for 'Activating (start)' status
Mikhail Kasimov
mikhail.kasimov at gmail.com
Thu Jul 6 16:12:28 UTC 2017
06.07.2017 18:27, Michael Chapman пишет:
> On Fri, 7 Jul 2017, Mikhail Kasimov wrote:
>> 06.07.2017 17:18, Michael Chapman пишет:
>>> On Thu, 6 Jul 2017, Mikhail Kasimov wrote:
>>>> Hello!
>>>>
>>>> 've got an interesting trouble on timer-activated service --
>>>> 'systemctl
>>>> status' returns a log with 'Activating (start)' status:
>>>>
>>>> [1]
>>>> ==========
>>>> k_mikhail at linux-mk500:~> systemctl status vba32update.service
>>>> ● vba32update.service - VBA32 Anti-Virus Update Service
>>>> Loaded: loaded (/etc/systemd/system/vba32update.service; disabled;
>>>> vendor preset: disabled)
>>>> Active: activating (start) since Чтв 2017-07-06 15:32:35 EEST;
>>>> 35min ago
>>>> Main PID: 6214 (vbaupdx)
>>>> Tasks: 1 (limit: 512)
>>>> CGroup: /system.slice/vba32update.service
>>>> └─6214 ./vbaupdx http://anti-virus.by/beta/update
>>>>
>>>> Июл 06 15:32:35 linux-mk500 systemd[1]: Starting VBA32 Anti-Virus
>>>> Update
>>>> Service...
>>>> Июл 06 15:32:35 linux-mk500 vbacl[6214]: Vba32 console scanner update
>>>> process started
>>>> Июл 06 15:32:35 linux-mk500 vbacl[6214]: Reading configuration options
>>>> from ./vbacl.ini
>>>> Июл 06 15:32:35 linux-mk500 vbacl[6214]: Using direct connection for
>>>> update
>>>> k_mikhail at linux-mk500:~>
>>>> ==========
>>>>
>>>>
>>>> Simultaneously:
>>>> [2]
>>>> ==========
>>>> k_mikhail at linux-mk500:~> systemctl list-units -t timer
>>>> UNIT LOAD ACTIVE SUB DESCRIPTION
>>>> vba32update.timer loaded active running Runs VBA32 Update
>>>> Hourly
>>>> ==========
>>>>
>>>> And that is normal. But 35 minutes for activating service is too long,
>>>> as for me.
>>>
>>> Is this a Type=oneshot service?
>>>
>>> It's a bit weird, but Type=oneshot services are not considered to be
>>> fully started until the ExecStart= command has exited. Until that time
>>> they're still "activating".
>>>
>>> You may be better off making the service Type=simple instead. A
>>> Type=simple service is fully started as soon as it has spawned the
>>> ExecStart= command.
>>
>> Yes, Type=oneshot, because, if Type=simple, service will be active
>> permanently in case of its start. But this is not what is needed here --
>> service should be started, then to check the updates of anti-virus
>> software and then be successfully closed. Nothing more. Only one thing
>> can impact here -- remote anti-virus server connection timeout. And if
>> server connection timeout is set in wrong way, having a native systemd
>> forced timeout for oneshot-services may be useful.
>
> I still think you want Type=simple there. A Type=simple service can
> exit when it's finished doing whatever it needs to do. The service
> will then transition back to its inactive state.
>
> Really, I think the only time Type=oneshot should be used is when you
> have a _sequence_ of units, where one unit shouldn't be started until
> the previous one has finished. You don't have that here.
Ok, here is Type=oneshot. And we can see two sessions of our service
(at1 7:06:52 and 18:06:57):
==================
[1]
Июл 06 17:06:52 linux-mk500 systemd[1]: Starting VBA32 Anti-Virus Update
Service...
Июл 06 17:06:52 linux-mk500 vbacl[8058]: Vba32 console scanner update
process started
Июл 06 17:06:52 linux-mk500 vbacl[8058]: Reading configuration options
from ./vbacl.ini
Июл 06 17:06:52 linux-mk500 vbacl[8058]: Using direct connection for update
Июл 06 17:06:56 linux-mk500 vbacl[8058]: Current dir is ./
Июл 06 17:06:56 linux-mk500 vbacl[8058]: Start update from
http://anti-virus.by/beta/update
Июл 06 17:06:56 linux-mk500 vbacl[8058]: Receiving file list
Июл 06 17:06:56 linux-mk500 vbacl[8058]: File list received
Июл 06 17:06:56 linux-mk500 vbacl[8058]: Update is not needed
Июл 06 17:06:57 linux-mk500 systemd[1]: Started VBA32 Anti-Virus Update
Service.
[2]
Июл 06 18:06:57 linux-mk500 systemd[1]: Starting VBA32 Anti-Virus Update
Service...
Июл 06 18:06:57 linux-mk500 vbacl[8842]: Vba32 console scanner update
process started
Июл 06 18:06:57 linux-mk500 vbacl[8842]: Reading configuration options
from ./vbacl.ini
Июл 06 18:06:57 linux-mk500 vbacl[8842]: Using direct connection for update
Июл 06 18:07:00 linux-mk500 vbacl[8842]: Current dir is ./
Июл 06 18:07:00 linux-mk500 vbacl[8842]: Start update from
http://anti-virus.by/beta/update
Июл 06 18:07:00 linux-mk500 vbacl[8842]: Receiving file list
Июл 06 18:07:00 linux-mk500 vbacl[8842]: File list received
Июл 06 18:07:00 linux-mk500 vbacl[8842]: Update is not needed
Июл 06 18:07:00 linux-mk500 systemd[1]: Started VBA32 Anti-Virus Update
Service.
==================
And here when Type=simple:
==================
Июл 06 18:47:29 linux-mk500 systemd[1]: Started VBA32 Anti-Virus Update
Service.
Июл 06 18:47:29 linux-mk500 vbacl[10042]: Vba32 console scanner update
process started
Июл 06 18:47:29 linux-mk500 vbacl[10042]: Reading configuration options
from ./vbacl.ini
Июл 06 18:47:29 linux-mk500 vbacl[10042]: Using direct connection for update
==================
'systemctl status' output here:
============================
k_mikhail at linux-mk500:~> systemctl status -l vba32update.service
● vba32update.service - VBA32 Anti-Virus Update Service
Loaded: loaded (/etc/systemd/system/vba32update.service; disabled;
vendor preset: disabled)
Active: active (running) since Чтв 2017-07-06 18:47:29 EEST; 13min ago
Main PID: 10042 (vbaupdx)
Tasks: 1 (limit: 512)
CGroup: /system.slice/vba32update.service
└─10042 ./vbaupdx http://anti-virus.by/beta/update
Июл 06 18:47:29 linux-mk500 systemd[1]: Started VBA32 Anti-Virus Update
Service.
Июл 06 18:47:29 linux-mk500 vbacl[10042]: Vba32 console scanner update
process started
Июл 06 18:47:29 linux-mk500 vbacl[10042]: Reading configuration options
from ./vbacl.ini
Июл 06 18:47:29 linux-mk500 vbacl[10042]: Using direct connection for update
============================
Service is _still_active_ and this is not what is needed here. The
service behavior correct is when it has Type=oneshot _only_.
" Type=simple service can exit when it's finished doing whatever it
needs to do. The service will then transition back to its inactive
state." -- as you can see, no. And in this case (when Type=oneshot), we
have to be able to close 'Activating (start)'-stated service, if this
status is on for a long time. I understand, that my use-case is very
specific, but it is real. So, let's try to find the method together.
To be more informative, here are 'systemctl cat' outputs both for
.service and .timer:
k_mikhail at linux-mk500:~> systemctl cat vba32update.service
===============================================
# /etc/systemd/system/vba32update.service
[Unit]
Description=VBA32 Anti-Virus Update Service
Requires=network.target
Wants=network-online.target
After=network.target network-online.target
[Service]
Type=oneshot
WorkingDirectory=/opt/vba/vbacl/
ExecStart=/opt/vba/vbacl/vbacl --update
EnvironmentFile=/opt/vba/vbacl/vbacl.ini
[Install]
WantedBy=multi-user.target
===============================================
===============================================
k_mikhail at linux-mk500:~> systemctl cat vba32update.timer
# /etc/systemd/system/vba32update.timer
[Unit]
Description=Runs VBA32 Update Hourly
Requires=timers.target
[Timer]
OnBootSec=2min
OnUnitInactiveSec=1h
AccuracySec=1us
[Install]
WantedBy=timers.target
k_mikhail at linux-mk500:~>
===============================================
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