Hi David, those 'Compilation failed in require at ... ' normally mean that 
perl is not able to find some modules at an "use" or "require" function 
call. You probably have to review those files at the lines mentioned, also 
which perl are using in each case (whether you are using system perl, or 
better installed your own user perl with perlbrew, or with plenv), and 
probably what directories are in your @INC array in each case. 

There are several ways to install modules in perl, and it is possible that 
when you run the script from inside the Unit file there are different 
versions of @INC leading to different directories an missing libraries in 
one of the cases.



El viernes, 24 de noviembre de 2017, 7:34:02 (UTC-3), davi...@gmail.com 
escribió:
>
> Hi Daniel,
> Thank you deltail adivces.
> I test follow your guide, but it's error same as I report before, it's in 
> Mojolicious 7.57.
> I once change Mojolicious to 6.58 to test, it's still error, error output:
>
> [root@localhost ~]# systemctl status mojo_test.service
> ● mojo_test.service - My Mojolicious application
>    Loaded: loaded (/usr/lib/systemd/system/mojo_test.service; enabled; 
> vendor preset: disabled)
>    Active: failed (Result: exit-code) since Fri 2017-11-24 18:23:20 CST; 
> 6s ago
>   Process: 2822 ExecStart=/root/perl5/bin/hypnotoad /home/mojo_user/
> mojo_test.pl (code=exited, status=2)
>   Process: 2820 ExecStartPre=/usr/bin/install -o mojo_user -g mojo_user -d 
> /var/log/mojo_test (code=exited, status=0/SUCCESS)
>   Process: 2819 ExecStartPre=/usr/bin/install -o mojo_user -g mojo_user -d 
> /run/mojo_test (code=exited, status=0/SUCCESS)
>
> Nov 24 18:23:20 localhost.localdomain hypnotoad[2822]: BEGIN 
> failed--compilation aborted at /usr/local/share/perl5/Mojo/Server/Daemon.pm 
> line 2.
> Nov 24 18:23:20 localhost.localdomain hypnotoad[2822]: Compilation failed 
> in require at /usr/local/share/perl5/Mojo/Base.pm line 77.
> Nov 24 18:23:20 localhost.localdomain hypnotoad[2822]: BEGIN 
> failed--compilation aborted at 
> /usr/local/share/perl5/Mojo/Server/Prefork.pm line 2.
> Nov 24 18:23:20 localhost.localdomain hypnotoad[2822]: Compilation failed 
> in require at /usr/local/share/perl5/Mojo/Server/Hypnotoad.pm line 9.
> Nov 24 18:23:20 localhost.localdomain hypnotoad[2822]: BEGIN 
> failed--compilation aborted at 
> /usr/local/share/perl5/Mojo/Server/Hypnotoad.pm line 9.
> Nov 24 18:23:20 localhost.localdomain hypnotoad[2822]: Compilation failed 
> in require at /root/perl5/bin/hypnotoad line 20.
> Nov 24 18:23:20 localhost.localdomain systemd[1]: mojo_test.service: 
> control process exited, code=exited status=2
> Nov 24 18:23:20 localhost.localdomain systemd[1]: Failed to start My 
> Mojolicious application.
> Nov 24 18:23:20 localhost.localdomain systemd[1]: Unit mojo_test.service 
> entered failed state.
> Nov 24 18:23:20 localhost.localdomain systemd[1]: mojo_test.service failed.
>
>
> David
>
>
> 在 2017年11月24日星期五 UTC+8上午8:45:57,Daniel Mantovani写道:
>>
>> Hi,
>>
>> Type=forking should work just fine, I am not sure that with Type=simple 
>> you will have all the functionallity you can get from systemd.
>>
>> A couple of advices though:
>>
>> 1) to get more confortable with systemd, you probably want to replicate 
>> as much as possible the example in Mojolicious::Guides::Cookbook. It just 
>> works very well (
>> https://metacpan.org/pod/distribution/Mojolicious/lib/Mojolicious/Guides/Cookbook.pod#Hypnotoad
>> )
>>
>> 2) But if you need to have pidfile and log files outside your working 
>> directory (like in /run/your_app/hypnotoad.pid and 
>> /var/log/your_app/production.log etc...), this simple approach will not 
>> work, because you probably don't want to run your application with 
>> permissions so high it will be able to write in /run or /var/log 
>> directories. Instead you normally use a user with minimal permissions.
>> Besides as far as I know hypnotoad requires to have permission rights in 
>> an already created directory for the pid file and also for the log file.
>>
>> If that is the case, what you can do is modify your original service file 
>> as follows:
>>
>> (I am supossing here that "/home/mojo_test.pl" is a typo, I guess if 
>> your user is "mojo_user" for instance, the path to the app will be 
>> something like "/home/mojo_user/mojo_test.pl")
>>
>> mojo_test.service
>> [Unit]
>> Description=My Mojolicious application
>> Requires=network.target
>> After=network.target
>>
>> [Service]
>> Type=forking
>> PIDFile=/run/mojo_test/hypnotoad.pid
>> User=mojo_user
>> Group=mojo_user
>> PermissionsStartOnly=True
>> ExecStartPre=/usr/bin/install -o mojo_user -g mojo_user -d /run/mojo_test
>> ExecStartPre=/usr/bin/install -o mojo_user -g mojo_user -d 
>> /var/log/mojo_test
>> ExecStart=/usr/local/bin/hypnotoad /home/mojo_user/mojo_test.pl
>> ExecReload=/usr/local/bin/hypnotoad /home/mojo_user/mojo_test.pl
>> KillMode=process
>>
>> [Install]
>> WantedBy=multi-user.target
>>
>> Please check that in your configuration file you have the pid set as 
>> /run/mojo_test/hypnotoad.pid, and that when
>> you define the path for the log file it goes inside /var/log/mojo_test 
>> directory, something like
>>
>> sub startup {
>>     ...
>>     $self->app->log->path('/var/log/mojo_test/production.log');
>>     ...
>>
>> }
>>
>> About the zero downtime hypnotoad feature, with reload it should work 
>> without any problems (you can check that in the log file). If you restart 
>> instead of course it will kill the process and then start again, and you 
>> can check that also in the log file.
>>
>> One last thing, if you happen to have a recent version of systemd or you 
>> are allowed to install that (not my case unfortunatelly), you should check 
>> RuntimeDirectory= and LogsDirectory= directives. You can check if those are 
>> supported in your system with 
>>
>> $ man systemd.directives
>>
>> If you have those, you will probably not need the ExecStartPre directives 
>> above, because the only thing these do is to create those directories.
>>
>> Hope it helps.
>> BR,
>> Daniel
>>
>> El jueves, 23 de noviembre de 2017, 13:36:10 (UTC-3), Boyd Duffee 
>> escribió:
>>>
>>> On 23/11/17 16:14, Dan Book wrote: 
>>> > I would not recommend running hypnotoad as a Type=simple service with 
>>> -f. 
>>> > This will not allow you to use hot-restarts via systemctl reload. 
>>>
>>> Naively, I _can_ hot-restart with systemctl reload servicename, but now 
>>> you've got me worried. 
>>> Any idea why it's not advisable and is Type=forking the proper solution? 
>>>
>>> -- 
>>> Boyd Duffee            Keele University    (01782) 734225 
>>> DevOps - Student Facing Systems 
>>>
>>>   Some people are born on third base and go through life 
>>>   thinking they hit a triple - Barry Switzer 
>>>
>>

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