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<div>Hello Marc,</div>
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<div>For which PID do you send the WINCH signal?</div>
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<span style="font-weight:bold">From: </span>nginx <<a href="mailto:nginx-bounces@nginx.org">nginx-bounces@nginx.org</a>> on behalf of Marc Soda <<a href="mailto:marc@soda.fm">marc@soda.fm</a>><br>
<span style="font-weight:bold">Reply-To: </span>"<a href="mailto:nginx@nginx.org">nginx@nginx.org</a>" <<a href="mailto:nginx@nginx.org">nginx@nginx.org</a>><br>
<span style="font-weight:bold">Date: </span>Tuesday, 4 April 2017 at 04.04<br>
<span style="font-weight:bold">To: </span>"<a href="mailto:nginx@nginx.org">nginx@nginx.org</a>" <<a href="mailto:nginx@nginx.org">nginx@nginx.org</a>><br>
<span style="font-weight:bold">Subject: </span>Binary upgrade with systemd<br>
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<div class="">Hello,</div>
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I’m using nginx 1.10.3 custom built on Ubuntu 16.04. I’m also using the recommended systemd service file:
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<div class=""><font face="Courier" class="">[Unit]</font></div>
<div class=""><font face="Courier" class="">Description=The NGINX HTTP and reverse proxy server</font></div>
<div class=""><font face="Courier" class="">After=syslog.target network.target remote-fs.target nss-lookup.target</font></div>
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</font></div>
<div class=""><font face="Courier" class="">[Service]</font></div>
<div class=""><font face="Courier" class="">Type=forking</font></div>
<div class=""><font face="Courier" class="">PIDFile=/run/nginx.pid</font></div>
<div class=""><font face="Courier" class="">ExecStartPre=/usr/sbin/nginx -t</font></div>
<div class=""><font face="Courier" class="">ExecStart=/usr/sbin/nginx</font></div>
<div class=""><font face="Courier" class="">ExecReload=/bin/kill -s HUP $MAINPID</font></div>
<div class=""><font face="Courier" class="">ExecStop=/bin/kill -s QUIT $MAINPID</font></div>
<div class=""><font face="Courier" class="">PrivateTmp=true</font></div>
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</font></div>
<div class=""><font face="Courier" class="">[Install]</font></div>
<div class=""><font face="Courier" class="">WantedBy=multi-user.target</font></div>
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<div class="">I’m try to do a no downtime upgrade with the USR2 and WINCH signals. Here is my process list before:</div>
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<div class=""><font face="Courier" class="">root 32277 0.0 0.4 1056672 71148 ? Ss 21:51 0:00 nginx: master process /usr/local/nginx/sbin/nginx</font></div>
<div class=""><font face="Courier" class="">www 32278 0.0 0.4 1057924 73152 ? S< 21:51 0:00 \_ nginx: worker process</font></div>
<div class=""><font face="Courier" class="">www 32279 0.0 0.4 1057924 73152 ? S< 21:51 0:00 \_ nginx: worker process</font></div>
<div class=""><font face="Courier" class="">www 32280 0.0 0.4 1057924 73152 ? S< 21:51 0:00 \_ nginx: worker process</font></div>
<div class=""><font face="Courier" class="">www 32281 0.0 0.4 1057924 73152 ? S< 21:51 0:00 \_ nginx: worker process</font></div>
<div class=""><font face="Courier" class="">www 32282 0.0 0.4 1057924 73152 ? S< 21:51 0:00 \_ nginx: worker process</font></div>
<div class=""><font face="Courier" class="">www 32283 0.0 0.4 1057924 73152 ? S< 21:51 0:00 \_ nginx: worker process</font></div>
<div class=""><font face="Courier" class="">www 32288 0.0 0.4 1057924 73152 ? S< 21:51 0:00 \_ nginx: worker process</font></div>
<div class=""><font face="Courier" class="">www 32289 0.0 0.4 1057924 73152 ? S< 21:51 0:00 \_ nginx: worker process</font></div>
<div class=""><font face="Courier" class="">www 32290 0.0 0.4 1057924 73152 ? S< 21:51 0:00 \_ nginx: worker process</font></div>
<div class=""><font face="Courier" class="">www 32291 0.0 0.4 1057924 73152 ? S< 21:51 0:00 \_ nginx: worker process</font></div>
<div class=""><font face="Courier" class="">www 32292 0.0 0.4 1057924 73152 ? S< 21:51 0:00 \_ nginx: worker process</font></div>
<div class=""><font face="Courier" class="">www 32293 0.0 0.4 1057924 73152 ? S< 21:51 0:00 \_ nginx: worker process</font></div>
<div class=""><font face="Courier" class="">www 32294 0.0 0.4 1056672 72212 ? S 21:51 0:00 \_ nginx: cache manager process</font></div>
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<div class="">and here it is after sending USR2:</div>
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<div class=""><font face="Courier" class="">root 32277 0.0 0.4 1056672 71868 ? Ss 21:51 0:00 nginx: master process /usr/local/nginx/sbin/nginx</font></div>
<div class=""><font face="Courier" class="">www 32278 0.0 0.4 1057924 73152 ? S< 21:51 0:00 \_ nginx: worker process</font></div>
<div class=""><font face="Courier" class="">www 32279 0.0 0.4 1057924 73152 ? S< 21:51 0:00 \_ nginx: worker process</font></div>
<div class=""><font face="Courier" class="">www 32280 0.0 0.4 1057924 73152 ? S< 21:51 0:00 \_ nginx: worker process</font></div>
<div class=""><font face="Courier" class="">www 32281 0.0 0.4 1057924 73152 ? S< 21:51 0:00 \_ nginx: worker process</font></div>
<div class=""><font face="Courier" class="">www 32282 0.0 0.4 1057924 73152 ? S< 21:51 0:00 \_ nginx: worker process</font></div>
<div class=""><font face="Courier" class="">www 32283 0.0 0.4 1057924 73152 ? S< 21:51 0:00 \_ nginx: worker process</font></div>
<div class=""><font face="Courier" class="">www 32288 0.0 0.4 1057924 73152 ? S< 21:51 0:00 \_ nginx: worker process</font></div>
<div class=""><font face="Courier" class="">www 32289 0.0 0.4 1057924 73152 ? S< 21:51 0:00 \_ nginx: worker process</font></div>
<div class=""><font face="Courier" class="">www 32290 0.0 0.4 1057924 73152 ? S< 21:51 0:00 \_ nginx: worker process</font></div>
<div class=""><font face="Courier" class="">www 32291 0.0 0.4 1057924 73152 ? S< 21:51 0:00 \_ nginx: worker process</font></div>
<div class=""><font face="Courier" class="">www 32292 0.0 0.4 1057924 73152 ? S< 21:51 0:00 \_ nginx: worker process</font></div>
<div class=""><font face="Courier" class="">www 32293 0.0 0.4 1057924 73152 ? S< 21:51 0:00 \_ nginx: worker process</font></div>
<div class=""><font face="Courier" class="">www 32294 0.0 0.4 1056672 72212 ? S 21:51 0:00 \_ nginx: cache manager process</font></div>
<div class=""><font face="Courier" class="">root 32461 5.5 0.5 1056676 82316 ? S 22:01 0:00 \_ nginx: master process /usr/local/nginx/sbin/nginx</font></div>
<div class=""><font face="Courier" class="">www 32465 0.0 0.4 1057928 73052 ? S< 22:01 0:00 \_ nginx: worker process</font></div>
<div class=""><font face="Courier" class="">www 32466 0.0 0.4 1057928 73052 ? S< 22:01 0:00 \_ nginx: worker process</font></div>
<div class=""><font face="Courier" class="">www 32467 0.0 0.4 1057928 73052 ? S< 22:01 0:00 \_ nginx: worker process</font></div>
<div class=""><font face="Courier" class="">www 32468 0.0 0.4 1057928 73052 ? S< 22:01 0:00 \_ nginx: worker process</font></div>
<div class=""><font face="Courier" class="">www 32469 0.0 0.4 1057928 73052 ? S< 22:01 0:00 \_ nginx: worker process</font></div>
<div class=""><font face="Courier" class="">www 32470 0.0 0.4 1057928 73052 ? S< 22:01 0:00 \_ nginx: worker process</font></div>
<div class=""><font face="Courier" class="">www 32471 0.0 0.4 1057928 73052 ? S< 22:01 0:00 \_ nginx: worker process</font></div>
<div class=""><font face="Courier" class="">www 32472 0.0 0.4 1057928 73052 ? S< 22:01 0:00 \_ nginx: worker process</font></div>
<div class=""><font face="Courier" class="">www 32473 0.0 0.4 1057928 73052 ? S< 22:01 0:00 \_ nginx: worker process</font></div>
<div class=""><font face="Courier" class="">www 32474 0.0 0.4 1057928 73052 ? S< 22:01 0:00 \_ nginx: worker process</font></div>
<div class=""><font face="Courier" class="">www 32475 0.0 0.4 1057928 73052 ? S< 22:01 0:00 \_ nginx: worker process</font></div>
<div class=""><font face="Courier" class="">www 32476 0.0 0.4 1057928 73052 ? S< 22:01 0:00 \_ nginx: worker process</font></div>
<div class=""><font face="Courier" class="">www 32477 0.0 0.4 1056676 72176 ? S 22:01 0:00 \_ nginx: cache manager process</font></div>
<div class=""><font face="Courier" class="">www 32478 0.0 0.4 1056676 72176 ? S 22:01 0:00 \_ nginx: cache loader process</font></div>
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<div class="">Notice how the new master is a child of the old master. If I send a WINCH I get:</div>
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<div class=""><font face="Courier" class="">root 32277 0.0 0.4 1056672 71868 ? Ss 21:51 0:00 nginx: master process /usr/local/nginx/sbin/nginx</font></div>
<div class=""><font face="Courier" class="">root 32461 0.2 0.5 1056676 82316 ? S 22:01 0:00 \_ nginx: master process /usr/local/nginx/sbin/nginx</font></div>
<div class=""><font face="Courier" class="">www 32465 0.0 0.4 1057928 73052 ? S< 22:01 0:00 \_ nginx: worker process</font></div>
<div class=""><font face="Courier" class="">www 32466 0.0 0.4 1057928 73052 ? S< 22:01 0:00 \_ nginx: worker process</font></div>
<div class=""><font face="Courier" class="">www 32467 0.0 0.4 1057928 73052 ? S< 22:01 0:00 \_ nginx: worker process</font></div>
<div class=""><font face="Courier" class="">www 32468 0.0 0.4 1057928 73052 ? S< 22:01 0:00 \_ nginx: worker process</font></div>
<div class=""><font face="Courier" class="">www 32469 0.0 0.4 1057928 73052 ? S< 22:01 0:00 \_ nginx: worker process</font></div>
<div class=""><font face="Courier" class="">www 32470 0.0 0.4 1057928 73052 ? S< 22:01 0:00 \_ nginx: worker process</font></div>
<div class=""><font face="Courier" class="">www 32471 0.0 0.4 1057928 73052 ? S< 22:01 0:00 \_ nginx: worker process</font></div>
<div class=""><font face="Courier" class="">www 32472 0.0 0.4 1057928 73052 ? S< 22:01 0:00 \_ nginx: worker process</font></div>
<div class=""><font face="Courier" class="">www 32473 0.0 0.4 1057928 73052 ? S< 22:01 0:00 \_ nginx: worker process</font></div>
<div class=""><font face="Courier" class="">www 32474 0.0 0.4 1057928 73052 ? S< 22:01 0:00 \_ nginx: worker process</font></div>
<div class=""><font face="Courier" class="">www 32475 0.0 0.4 1057928 73052 ? S< 22:01 0:00 \_ nginx: worker process</font></div>
<div class=""><font face="Courier" class="">www 32476 0.0 0.4 1057928 73052 ? S< 22:01 0:00 \_ nginx: worker process</font></div>
<div class=""><font face="Courier" class="">www 32477 0.0 0.4 1056676 72176 ? S 22:01 0:00 \_ nginx: cache manager process</font></div>
<div class=""><font face="Courier" class="">www 32478 0.0 0.4 1056676 72176 ? S 22:01 0:00 \_ nginx: cache loader process</font></div>
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<div class="">which is not what I’m looking for. Is this a limitation when running with systemd?</div>
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<div class="">Thanks,</div>
<div class="">Marc</div>
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