[mapserver-users] nginx/fastcgi/mapserver

[Peter Maes]

Also, nginx isnt calling my spawn script. Is that normal? Otherwise the
process would restart. But once it dies (the one i executed on the shell)
it doesnt startup the script anymore.

2012/5/11 Peter Maes <thxftw at gmail.com>

> Hi,
>
> Thanks again for your answer Thomas.
>
> I have seen that issue report and I am using mapserver latest version
> (6.0.2 (which is what you meant? or is there an actual 6.2 somewhere)
>
> It does indeed keep working if i reference a good map and hammer F5.
>
> Although: when i for instance call a wrong mapfile and hammer that it will
> also kill the processes. Is there a workaround for this? Otherwise people
> can just execute denial of service attacks on my mapserver.
>
> We're already using nginx for static file hosting. It would be great if i
> could get a production ready mapserver environment there as well.
>
>
> 2012/5/11 thomas bonfort <thomas.bonfort at gmail.com>
>
>> You might want to have a look at
>> https://github.com/mapserver/mapserver/issues/3099
>>
>> tl;dr
>>  - mapserver fastcgi calls exit() when running in an error condition,
>> which causes some fastcgi spawning managers to have issues
>>  - mapserver 6.2 (current git master) has been refactored to greatly
>> minimize the exit() occurences (basically only on memory allocation
>> errors)
>>
>> --
>> thomas
>>
>> On Fri, May 11, 2012 at 10:42 AM, Peter Maes <thxftw at gmail.com> wrote:
>> > Hello,
>> >
>> > I'm trying to run mapserver on nginx (fastcgi), but after 2 days booked
>> > little success.
>> >
>> > 1. I've compiled mapserv with fastcgi support and validated this
>> > 2. I created a spawn-fcgi startup script based on this
>> > : http://osgeo-org.1560.n6.nabble.com/Mapserver-on-nginx-td4226669.html
>> >
>> > It now looks like this:
>> > ----
>> > #!/bin/sh
>> > MAPSERV_PORT=9001
>> > USER=www-data
>> > DAEMON=/usr/local/bin/mapserv
>> > CHILDREN=5
>> >
>> > # the -F switch of spawn-fcg does not work when the -n swich
>> > # is set. using multiwatch instead
>> > # see http://manpages.ubuntu.com/manpages/lucid/man1/spawn-fcgi.1.html
>> >
>> > exec setuidgid $USER spawn-fcgi \
>> >   -a 127.0.0.1 \
>> >   -p $MAPSERV_PORT \
>> >   -u $USER \
>> >   /usr/bin/multiwatch -f $CHILDREN $DAEMON
>> > ----
>> >
>> > In Nginx its called like this:
>> >
>> >        location /mapserver/ {
>> >                 include /etc/nginx/fastcgi_params;
>> >                 fastcgi_pass 127.0.0.1:9001;
>> >
>> >                 fastcgi_param SCRIPT_FILENAME
>> /usr/local/run/spawnscript;
>> >                 fastcgi_param PATH_INFO /usr/local/run/ spawnscript;
>> >         }
>> >
>> > When i try to connect to /mapserver in my browser, i get an error
>> stating
>> > 502 Bad gateway.
>> >
>> > So i tried starting the spawn script
>> manually: /usr/local/run/spawnscript .
>> > When i then try to connect using browser it works fine for a short
>> while. On
>> > the console it logs this error:
>> > Spawing child[0] failed, next try
>> > Child[1] died, respawn
>> > Child[2] died, respawn
>> > Child[3] died, respawn
>> > Child[4] died, respawn
>> > Child[0] died, respawn
>> > Spawing child[1] failed, next try
>> > Spawing child[2] failed, next try
>> > Spawing child[3] failed, next try
>> > Spawing child[4] failed, next try
>> > Spawing child[0] failed, next try
>> > Spawing child[1] failed, next try
>> > Spawing child[2] failed, next try
>> > Spawing child[3] failed, next try
>> > Spawing child[4] failed, next try
>> > Spawing child[0] failed, next try
>> > Spawing child[1] failed, next try
>> > Spawing child[2] failed, next try
>> > Spawing child[3] failed, next try
>> > Spawing child[4] failed, next try
>> > Spawing child[0] failed, next try
>> > Spawing child[1] failed, next try
>> > Child[1] died to often, not forking again
>> > Spawing child[2] failed, next try
>> > Child[2] died to often, not forking again
>> > Spawing child[3] failed, next try
>> > Child[3] died to often, not forking again
>> > Spawing child[4] failed, next try
>> > Child[4] died to often, not forking again
>> > Spawing child[0] failed, next try
>> > Child[0] died to often, not forking again
>> >
>> > After which the process exits and I revert to the 502 Bad gateway.
>> >
>> > What am I missing here? :).
>> >
>> > Thanks for any tips. I'm not that experienced with spawn-fcgi.
>> >
>> >
>> >
>> > _______________________________________________
>> > mapserver-users mailing list
>> > mapserver-users at lists.osgeo.org
>> > http://lists.osgeo.org/mailman/listinfo/mapserver-users
>> >
>>
>
>
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