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Last Updated: February 25, 2016
·
2.169K
· mikhailov

Nginx Binary Live Upgrade

Ok, you have run Nginx-1.3.5 and want to upgrade binary without any downtime. With help of Unix Signals USR2+WINCH+QUIT it's easy and handy. Let's start with download of latest SPDY-pepper:

cd /usr/src;
wget http://nginx.org/download/nginx-1.3.14.tar.gz;
tar xzvf ./nginx-1.3.14.tar.gz && rm -f ./nginx-1.3.14.tar.gz && cd nginx-1.3.14;
wget http://nginx.org/patches/spdy/patch.spdy-66_1.3.14.txt && patch -p1 < patch.spdy-66_1.3.14.txt;

./configure --prefix=/opt/nginx --with-pcre=/usr/src/pcre-8.30 --with-zlib=/usr/src/zlib-1.2.7 --with-openssl-opt=no-krb5 --with-openssl=/usr/src/openssl-1.0.1c --with-http_ssl_module --with-http_spdy_module --without-mail_pop3_module --without-mail_smtp_module --without-mail_imap_module --with-http_stub_status_module --with-http_gzip_static_module;
make install clean;

Let's assume that the current Master PID is 19568, but the new Master PID is 22716.

Now we have to roll out the master processes:

1) $ ps aux |grep nginx
root     19568  .....  nginx: master (old)
app      20769  .....  nginx: worker (old)

2) $ kill -USR2 $(cat /opt/nginx/logs/nginx.pid);
$ ps aux |grep nginx
root     19568  .....  nginx: master (old)
app      20769  .....  nginx: worker (old)
root     22716  .....  nginx: master (new)
app      22717  .....  nginx: worker (new)

3) $ kill -WINCH $(cat /opt/nginx/logs/nginx.pid.oldbin);
$ ps aux |grep nginx
root     19568  .....  nginx: master (old)
root     22716  .....  nginx: master (new)
app      22717  .....  nginx: worker (new)

4) $ kill -QUIT $(cat /opt/nginx/logs/nginx.pid.oldbin);
$ ps aux |grep nginx
root     22716  .....  nginx: master (new)
app      22717  .....  nginx: worker (new)

TL;DR

kill -USR2 $(cat /opt/nginx/logs/nginx.pid);
kill -WINCH $(cat /opt/nginx/logs/nginx.pid.oldbin);
kill -QUIT $(cat /opt/nginx/logs/nginx.pid.oldbin);