Encountered a problem----connect() failed (111: Connection refused) while connecting to upstream solution

When we start nginx, we may encounter the problem of connect() failed (111: Connection refused) while connecting to upstream.

Sometimes nginx runs normally, but you will find that there are still errors in the error log: connect() failed (111: Connection refused) while connecting to upstream.Generally, our upstream is fastcgi://127.0.0.1 :9000. There are roughly three reasons for this problem

php-fpm is not installed

This is the case with the newly purchased Alibaba Cloud server. There is nginx, but php-fpm is not installed

In this case, please refer to

centos to install php php-fpm and configure nginx

php-fpm is not running

Execute the following command to check whether php-fpm is started, if not, start yours Just php-fpm

netstat -ant | grep 9000

sudo /usr/local/php/sbin/php-fpm  

php-fpm queue is full

php-fpm.conf configuration filepm.max_children should be changed to a larger size, restart php-fpm and observe Log status

The above introduces the solution to the problem----connect() failed (111: Connection refused) while connecting to upstream, including the relevant content. I hope it will be helpful to friends who are interested in PHP tutorials.