How to install Nginx by Raj Gupta

Nginx:- NGINX is a free, open-source, high-performance HTTP server and reverse proxy, as well as an IMAP/POP3 proxy server. NGINX is known for its high performance, stability, rich feature set, simple configuration, and low resource consumption. NGINX is one of a handful of servers written to address the C10K problem.How Does NGINX Work? NGINX is built to offer low memory usage and high concurrency. Rather than creating new processes for each web request, NGINX uses an asynchronous, event-driven approach where requests are handled in a single thread. With NGINX, one master process can control multiple worker processes

download latest version of nginx from http://nginx.org/en/download.html website

yum update

cd /opt

yum install wget -y

wget http://nginx.org/download/nginx-1.15.4.tar.gz

tar -zxvf nginx-1.15.4.tar.gz

mv nginx-1.15.4 /opt/nginx

In order to compile our source code, we need to install dependences.

yum groupinstall "Development Tools"

yum install pcre pcre-devel zlib zlib-devel openssl openssl-devel

Run /opt/nginx/configure file with below parameters

cd /opt/nginx

./configure --sbin-path=/usr/bin/nginx --conf-path=/etc/nginx/nginx.conf  --error-log-path=/var/log/nginx/error.log --http-log-path=/var/log/nginx/access.log --with-pcre --pid-path=/var/run/nginx.pid --with-http_ssl_module

Now compile and install nginx

make

make install

Check nginx version and start service to use.

nginx -V

nginx

Setup nginx as a system servicecreate a file /lib/systemd/system/nginx.service and copy below URL content into that and modify according to your file path locations.

Ref URL : https://www.nginx.com/resources/wiki/start/topics/examples/systemd/

vi /lib/systemd/system/nginx.service

[Unit]

Description=The NGINX HTTP and reverse proxy server

After=syslog.target network.target remote-fs.target nss-lookup.target

[Service]

Type=forking

PIDFile=/run/nginx.pid

ExecStartPre=/usr/sbin/nginx -t

ExecStart=/usr/sbin/nginx

ExecReload=/usr/sbin/nginx -s reload

ExecStop=/bin/kill -s QUIT $MAINPID

PrivateTmp=true

[Install]

WantedBy=multi-user.target

Start nginx and test

systemctl start nginx

systemctl enable nginx

ps aux | grep nginx

if you get any issue below are solution for that

[root@ip-172-31-91-40 nginx]# chmod 777 /usr/sbin/nginx        ---------if it give access issue then then set it permission to access all

[root@ip-172-31-91-40 /]# find / -name nginx.service

/usr/lib/systemd/system/nginx.service

[root@ip-172-31-91-40 /]# cd /usr/sbin/

[root@ip-172-31-91-40 sbin]# ln -s /usr/bin/nginx nginx             -------making softlink so that when it search in sbin then it will redirect to bin because our nginx are in bin

[root@ip-172-31-91-40 sbin]# ll nginx

lrwxrwxrwx. 1 root root 14 Jan 10 12:32 nginx -> /usr/bin/nginx

[root@ip-172-31-91-40 sbin]# vi /lib/systemd/system/nginx.service

[root@ip-172-31-91-40 sbin]# systemctl start nginx

Warning: nginx.service changed on disk. Run 'systemctl daemon-reload' to reload units.

[root@ip-172-31-91-40 sbin]# systemctl daemon-reload

[root@ip-172-31-91-40 sbin]# systemctl start nginx

[root@ip-172-31-91-40 sbin]# systemctl enable nginx

Created symlink from /etc/systemd/system/multi-user.target.wants/nginx.service t                                                                                        o /usr/lib/systemd/system/nginx.service.

[root@ip-172-31-91-40 sbin]# ps aux | grep nginx

root      4584  0.0  0.1  45860  1128 ?        Ss   12:32   0:00 nginx: master process /usr/sbin/nginx

nobody    4585  0.0  0.1  46304  1908 ?        S    12:32   0:00 nginx: worker process

root      4694  0.0  0.0 112708   976 pts/0    S+   12:34   0:00 grep --color=auto nginx

[root@ip-172-31-91-40 sbin]# pwd

/usr/sbin