uwsgi creates spooler dirs and leaves them writable by root only #1858
Description
I noticed my deployment broke when i added multiple spoolers, ie. with --spooler=/spooler/mail --spooler=/spooler/stat: it would create the mail and stat directories inside /spooler and leave them writable by root only.
Then, it seems uwsgi's spooler is stuck in an endless loop trying to write inside this directory after changing uid from root.
spawned the uWSGI spooler on dir /spooler/mail with pid 15317 OOOPS the spooler is no more...trying respawn... spawned the uWSGI spooler on dir /spooler/stat with pid 15318
chdir(): Permission denied [core/spooler.c line 437] chdir(): Permission denied [core/spooler.c line 437] OOOPS the spooler is no more...trying respawn... spawned the uWSGI spooler on dir /spooler/mail with pid 15319
OOOPS the spooler is no more...trying respawn... chdir(): Permission denied [core/spooler.c line 437] spawned the uWSGI spooler on dir /spooler/stat with pid 15320
chdir(): Permission denied [core/spooler.c line 437] OOOPS the spooler is no more...trying respawn... spawned the uWSGI spooler on dir /spooler/mail with pid 15321
OOOPS the spooler is no more...trying respawn... chdir(): Permission denied [core/spooler.c line 437] spawned the uWSGI spooler on dir /spooler/stat with pid 15322
chdir(): Permission denied [core/spooler.c line 437] OOOPS the spooler is no more...trying respawn... spawned the uWSGI spooler on dir /spooler/mail with pid 15323
OOOPS the spooler is no more...trying respawn... chdir(): Permission denied [core/spooler.c line 437] spawned the uWSGI spooler on dir /spooler/stat with pid 15324 chdir(): Permission denied [core/spooler.c line 437]
OOOPS the spooler is no more...trying respawn... spawned the uWSGI spooler on dir /spooler/mail with pid 15325 OOOPS the spooler is no more...trying respawn... chdir(): Permission denied [core/spooler.c line 437]
spawned the uWSGI spooler on dir /spooler/stat with pid 15326 chdir(): Permission denied [core/spooler.c line 437] OOOPS the spooler is no more...trying respawn... spawned the uWSGI spooler on dir /spooler/mail with pid 15327
OOOPS the spooler is no more...trying respawn... chdir(): Permission denied [core/spooler.c line 437] spawned the uWSGI spooler on dir /spooler/stat with pid 15328 chdir(): Permission denied [core/spooler.c line 437]
OOOPS the spooler is no more...trying respawn... spawned the uWSGI spooler on dir /spooler/mail with pid 15329
Just chown'ing the directories fixes uWSGI startup:
chdir(): Permission denied [core/spooler.c line 437]
spawned the uWSGI spooler on dir /spooler/stat with pid 15352 chdir(): Permission denied [core/spooler.c line 437] OOOPS the spooler is no more...trying respawn... spawned the uWSGI spooler on dir /spooler/mail with pid 15353
OOOPS the spooler is no more...trying respawn... spawned the uWSGI spooler on dir /spooler/stat with pid 15354
[pid: 20|app: 0|req: 2/26] 93.174.144.106 () {44 vars in 767 bytes} [Mon Aug 27 08:28:13 2018] GET /demande => generated 23849 bytes in 192 msecs (HTTP/1.1 200) 7 headers in 449 bytes (1 switches on core 0)
As you can see, it then leaves two working spooler processes (in a container, note that uwsgi started as pid 11):
docker exec -it my ps aux
USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND
root 1 0.0 0.0 4592 816 ? Ss 06:19 0:00 /bin/sh -c /usr
root 10 0.0 0.0 4316 888 ? S 06:19 0:00 /usr/bin/dumb-i
uwsgi 11 0.0 0.3 245388 55116 ? Ss 06:19 0:20 uwsgi --spooler
uwsgi 15 0.0 0.2 245388 41696 ? S 06:19 0:00 uwsgi --spooler
uwsgi 16 0.0 0.3 323876 53696 ? Sl 06:19 0:00 uwsgi --spooler
uwsgi 17 0.0 0.3 255824 57684 ? S 06:19 0:01 uwsgi --spooler
uwsgi 18 0.0 0.3 328408 58908 ? Sl 06:19 0:01 uwsgi --spooler
uwsgi 19 0.0 0.3 330532 61316 ? Sl 06:19 0:01 uwsgi --spooler
uwsgi 20 0.0 0.3 252528 53880 ? S 06:19 0:00 uwsgi --spooler
uwsgi 21 0.0 0.3 250788 51940 ? S 06:19 0:00 uwsgi --spooler
uwsgi 22 0.0 0.3 250788 51940 ? S 06:19 0:00 uwsgi --spooler
uwsgi 23 0.0 0.2 245388 41696 ? S 06:19 0:00 uwsgi --spooler
uwsgi 24 0.0 0.3 252516 53608 ? S 06:19 0:00 uwsgi --spooler
uwsgi 25 0.0 0.2 245528 43252 ? S 06:19 0:00 uwsgi --spooler
uwsgi 26 0.0 0.3 251212 52300 ? S 06:19 0:00 uwsgi --spooler
uwsgi 15353 0.0 0.2 248056 48096 ? SN 08:27 0:00 uwsgi --spooler
uwsgi 15354 0.0 0.2 245388 40796 ? SN 08:27 0:00 uwsgi --spooler
root 15371 0.0 0.0 38976 3108 pts/0 Rs+ 12:26 0:00 ps aux