connect() to unix:///tmp/web2py.socket failed (13: Permission denied) in mac - macos

Question

I have followed below tutorial to setup nginx+web2py+uwsgi but nginx couldn't access uwsgi socket. below is my configuration file. when i am opening localhost it is showing 502 bad gateway and nginx error log is showing permission denied while trying to access web2py.socket
setup web2py+uwsgi+nginx on ubuntu
nginx conf file in /usr/local/etc/nginx/nginx.conf
#user nobody;
worker_processes 1;
error_log /var/log/nginx/nginx_error.log;
#error_log logs/error.log notice;
#error_log logs/error.log info;
#pid logs/nginx.pid;
events {
worker_connections 1024;
}
http {
include mime.types;
default_type application/octet-stream;
#log_format main '$remote_addr - $remote_user [$time_local] "$request" '
# '$status $body_bytes_sent "$http_referer" '
# '"$http_user_agent" "$http_x_forwarded_for"';
#access_log logs/access.log main;
sendfile on;
#tcp_nopush on;
#keepalive_timeout 0;
keepalive_timeout 65;
#gzip on;
server {
listen 80;
server_name $hostname;
###to enable correct use of response.static_version
location ~* ^/(\w+)/static(?:/_[\d]+\.[\d]+\.[\d]+)?/(.*)$ {
alias /Users/sudhakar/Desktop/web2py/applications/$1/static/$2;
expires max;
### if you want to use pre-gzipped static files (recommended)
### check scripts/zip_static_files.py and remove the comments
# include /etc/nginx/conf.d/web2py/gzip_static.conf;
}
###
location / {
#uwsgi_pass 127.0.0.1:9001;
uwsgi_pass unix:///tmp/web2py.socket;
include uwsgi_params;
uwsgi_param UWSGI_SCHEME $scheme;
uwsgi_param SERVER_SOFTWARE nginx/$nginx_version;
###remove the comments to turn on if you want gzip compression of your pages
# include /etc/nginx/conf.d/web2py/gzip.conf;
### end gzip section
### remove the comments if you use uploads (max 10 MB)
#client_max_body_size 10m;
###
}
}
server {
listen 443 default_server ssl;
server_name $hostname;
ssl_certificate /usr/local/etc/nginx/ssl/web2py.crt;
ssl_certificate_key /usr/local/etc/nginx/ssl/web2py.key;
ssl_prefer_server_ciphers on;
ssl_session_cache shared:SSL:10m;
ssl_session_timeout 10m;
ssl_ciphers ECDHE-RSA-AES256-SHA:DHE-RSA-AES256-SHA:DHE-DSS-AES256-SHA:DHE-RSA-AES128-SHA:DHE-DSS-AES128-SHA;
ssl_protocols TLSv1 TLSv1.1 TLSv1.2;
keepalive_timeout 70;
location / {
#uwsgi_pass 127.0.0.1:9001;
uwsgi_pass unix:///tmp/web2py.socket;
include uwsgi_params;
uwsgi_param UWSGI_SCHEME $scheme;
uwsgi_param SERVER_SOFTWARE nginx/$nginx_version;
###remove the comments to turn on if you want gzip compression of your pages
# include /etc/nginx/conf.d/web2py/gzip.conf;
### end gzip section
### remove the comments if you want to enable uploads (max 10 MB)
#client_max_body_size 10m;
###
}
###to enable correct use of response.static_version
location ~* ^/(\w+)/static(?:/_[\d]+\.[\d]+\.[\d]+)?/(.*)$ {
alias /Users/sudhakar/Desktop/web2py/applications/$1/static/$2;
expires max;
### if you want to use pre-gzipped static files (recommended)
### check scripts/zip_static_files.py and remove the comments
# include /etc/nginx/conf.d/web2py/gzip_static.conf;
}
###
}
include servers/*;
}
uwsgi conf file in /etc/uwsgi/web2py.ini
[uwsgi]
socket = /tmp/web2py.socket
chmod-socket = 600
uid = _www
gid = _www
pythonpath = /Users/sudhakar/Desktop/web2py/
mount = /=wsgihandler:application
processes = 4
master = true
harakiri = 60
reload-mercy = 8
cpu-affinity = 1
stats = /tmp/stats.socket
max-requests = 2000
limit-as = 512
reload-on-as = 256
reload-on-rss = 192
touch-reload = /Users/sudhakar/Desktop/web2py/routes.py
cron = 0 0 -1 -1 -1 python /Users/sudhakar/Desktop/web2py/web2py.py -Q -S welcome -M -R scripts/sessions2trash.py -A -o
no-orphans = true
below command is use to run uwsgi
exec /usr/local/bin/uwsgi --ini /etc/uwsgi/web2py.ini

Answer 1

You need to run nginx and uwsgi processes with same user. Alternatively, you can change socket file permission but it's not recommended because of security issues.
Solution 1:
Change #user nobody; line as user _www; in your /usr/local/etc/nginx/nginx.conf file (to run Nginx process with _www user)
Then restart nginx service
Solution 2:
Change chmod-socket = 600 line as chmod-socket = 666 in your /etc/uwsgi/web2py.ini file. (Not recommended)
Then restart uwsgi service