nginx - php connect() unix socket failing - php

Question

I am running alpine 3.12 container with a few custom configuration like so:
FROM alpine:3.12
[some irrelevant stuff]
# Switch to use a non-root user from here on
USER nobody
# Expose the port nginx is reachable on
EXPOSE 8080
# Let supervisord start nginx & php-fpm
CMD ["/usr/bin/supervisord", "-c", "/etc/supervisor/conf.d/supervisord.conf"]
# Make sure files/folders needed by the processes are accessable when they run under the nobody user
RUN chown -R nobody.nobody /var/www/html && \
chown -R nobody.nobody /run && \
chown -R nobody.nobody /var/lib/nginx && \
chown -R nobody.nobody /var/log/nginx
# Configure a healthcheck to validate that everything is up&running
HEALTHCHECK --timeout=10s CMD curl --fail http://127.0.0.1:8080/fpm-ping
I have my nginx.conf with the following data:
worker_processes 1;
error_log stderr warn;
pid /run/nginx.pid;
events {
worker_connections 1024;
}
http {
include mime.types;
default_type application/octet-stream;
# Define custom log format to include reponse times
log_format main_timed '$remote_addr - $remote_user [$time_local] "$request" '
'$status $body_bytes_sent "$http_referer" '
'"$http_user_agent" "$http_x_forwarded_for" '
'$request_time $upstream_response_time $pipe $upstream_cache_status';
access_log /dev/stdout main_timed;
error_log /dev/stderr notice;
keepalive_timeout 65;
# Write temporary files to /tmp so they can be created as a non-privileged user
client_body_temp_path /tmp/client_temp;
proxy_temp_path /tmp/proxy_temp_path;
fastcgi_temp_path /tmp/fastcgi_temp;
uwsgi_temp_path /tmp/uwsgi_temp;
scgi_temp_path /tmp/scgi_temp;
# Default server definition
server {
listen [::]:8080 default_server;
listen 8080 default_server;
server_name _;
sendfile off;
root /var/www/html/public;
index index.php index.html;
location / {
# try_files $uri $uri/ /index.php?q=$uri&$args;
try_files $uri $uri/ /index.php$is_args$args;
}
# Redirect server error pages to the static page /50x.html
error_page 500 502 503 504 /50x.html;
location = /50x.html {
root /var/lib/nginx/html/public;
}
# Pass the PHP scripts to PHP-FPM listening on 127.0.0.1:9000
location ~ \.php$ {
fastcgi_split_path_info ^(.+\.php)(/.+)$;
fastcgi_pass 127.0.0.1:9000;
fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
fastcgi_param SCRIPT_NAME $fastcgi_script_name;
fastcgi_index index.php;
include fastcgi_params;
}
location ~* \.(jpg|jpeg|gif|png|css|js|ico|xml)$ {
expires 5d;
}
# Deny access to . files, for security
location ~ /\. {
log_not_found off;
deny all;
}
# Allow fpm ping and status from localhost
location ~ ^/(fpm-status|fpm-ping)$ {
access_log off;
allow 127.0.0.1;
deny all;
fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
include fastcgi_params;
fastcgi_pass 127.0.0.1:9000;
}
}
gzip on;
gzip_proxied any;
gzip_types text/plain application/xml text/css text/js text/xml application/x-javascript text/javascript application/json application/xml+rss;
gzip_vary on;
gzip_disable "msie6";
# Include other server configs
include /etc/nginx/conf.d/*.conf;
}
and my supervisord config such as:
[supervisord]
nodaemon=true
logfile=/dev/null
logfile_maxbytes=0
pidfile=/run/supervisord.pid
[program:php-fpm]
command=php-fpm7 -F
stdout_logfile=/dev/stdout
stdout_logfile_maxbytes=0
stderr_logfile=/dev/stderr
stderr_logfile_maxbytes=0
autorestart=false
startretries=0
[program:nginx]
command=nginx -g 'daemon off;'
stdout_logfile=/dev/stdout
stdout_logfile_maxbytes=0
stderr_logfile=/dev/stderr
stderr_logfile_maxbytes=0
autorestart=false
startretries=0
and in my php-fpm/www.conf:
[global]
; Log to stderr
error_log = /dev/stderr
[www]
; The address on which to accept FastCGI requests.
; Valid syntaxes are:
; 'ip.add.re.ss:port' - to listen on a TCP socket to a specific IPv4 address on
; a specific port;
; '[ip:6:addr:ess]:port' - to listen on a TCP socket to a specific IPv6 address on
; a specific port;
; 'port' - to listen on a TCP socket to all addresses
; (IPv6 and IPv4-mapped) on a specific port;
; '/path/to/unix/socket' - to listen on a unix socket.
; Note: This value is mandatory.
listen = 127.0.0.1:9000
; Enable status page
pm.status_path = /fpm-status
; Ondemand process manager
pm = ondemand
; The number of child processes to be created when pm is set to 'static' and the
; maximum number of child processes when pm is set to 'dynamic' or 'ondemand'.
; This value sets the limit on the number of simultaneous requests that will be
; served. Equivalent to the ApacheMaxClients directive with mpm_prefork.
; Equivalent to the PHP_FCGI_CHILDREN environment variable in the original PHP
; CGI. The below defaults are based on a server without much resources. Don't
; forget to tweak pm.* to fit your needs.
; Note: Used when pm is set to 'static', 'dynamic' or 'ondemand'
; Note: This value is mandatory.
pm.max_children = 100
; The number of seconds after which an idle process will be killed.
; Note: Used only when pm is set to 'ondemand'
; Default Value: 10s
pm.process_idle_timeout = 10s;
; The number of requests each child process should execute before respawning.
; This can be useful to work around memory leaks in 3rd party libraries. For
; endless request processing specify '0'. Equivalent to PHP_FCGI_MAX_REQUESTS.
; Default Value: 0
pm.max_requests = 1000
; Make sure the FPM workers can reach the environment variables for configuration
clear_env = no
; Catch output from PHP
catch_workers_output = yes
; Remove the 'child 10 said into stderr' prefix in the log and only show the actual message
decorate_workers_output = no
; Enable ping page to use in healthcheck
ping.path = /fpm-ping
So my question: Where is this error log coming from???
[crit] 9#9: *2 connect() to unix:/var/run/php7.3-fpm.sock failed (2: No such file or directory) while connecting to upstream, client: 172.17.0.1, server: , request: "GET / HTTP/1.1", upstream: "fastcgi://unix:/var/run/php7.3-fpm.sock:", host: "127.0.0.1:8080"
It should really not be triggered, since I never specify php-fpm to listen to this socket. Where does it come from???