Docker log to stdout

docker-stdout

Sometimes you want your container to log to stdout, but the process can only write to a file.
e.g. nginx

Simply create a symlink from the logfile you are writing to, to /proc/self/fd/1 or write directly to it.

Example:

user www-data;
worker_processes 4;
pid /run/nginx.pid;

events {
  worker_connections  2048;
  multi_accept on;
  use epoll;
}

http {
  server_tokens off;
  sendfile on;
  tcp_nopush on;
  tcp_nodelay on;
  keepalive_timeout 15;
  types_hash_max_size 2048;
  include /etc/nginx/mime.types;
  default_type application/octet-stream;
  access_log /proc/self/fd/1;
  error_log /proc/self/fd/1 info;
  gzip on;
  gzip_disable "msie6";
  include /etc/nginx/conf.d/*.conf;
  include /etc/nginx/sites-enabled/*;
  open_file_cache max=100;
}

daemon off;