CODEWITHSUNDEEP
linuxpidupstart
enzoyang
enzoyang

Reputation: 877

How to write pid file after uid is set in upstart config file

currently I need to start a java application from upstart file and monitor it with monit, but needs a pid file.

I set the application user to be wwww-data:adm using

setuid www-data    
setgid adm

and then

script  
    echo $$ > /var/run/logstash.pid  
    exec java -jar logstash.jar agent -f logstash.conf --log logstash.stdout  
end script

error log shows that 

/proc/self/fd/9: 2: /proc/self/fd/9: cannot create /var/run/logstash.pid: Permission denied

How can I write the pid file?

ps. I used start-stop-daemon and it tells "can not create Java Virtual Machine"

Upvotes: 1

Views: 775

Answers (2)

Navdeep Singh
Navdeep Singh

Reputation: 13

Files and directories in /run and /var/run are not persistent across reboot.

Workaround - We can solve this by making a sub-directory every time a system comes up, via init scripts.

I guess monit does not have an inbuilt solution to solve this. I would like to know the ideal solution for this, if someone comes up.

Upvotes: 0

enzoyang
enzoyang

Reputation: 877

I finally solved it by adding a folder owned by www-data:adm in /var/run and put pid file there.

Upvotes: 1

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