An example discourse.conf file, configured to work with Nanobox (nanobox.io).

discorse.conf

#
# DO NOT EDIT THIS FILE
# If you need to make changes create a file called discourse.conf in this directory with your changes
# On import this file will be imported using ERB
#

# Discourse supports multiple mechanisms for production config.
#
# 1. You can do nothing and get these defaults (not recommended, you should at least set hostname)
# 2. You can copy this file to config/discourse.conf and amend with your settings
# 3. You can pass in config from your environment, all the settings below are available.
#    Append DISCOURSE_ and upper case the setting in ENV. For example:
#    to pass in db_timeout of 200 you would use DISCOURSE_DB_TIMEOUT=200

# All settings apply to production only

# connection pool size, sidekiq is set to 5, allowing an extra 3 for bg threads
db_pool = 8

# database timeout in milliseconds
db_timeout = 5000

# socket file used to access db
db_socket =

# host address for db server
# This is set to blank so it tries to use sockets first
db_host = <%= ENV['DATA_DB_HOST'] %>

# port running db server, no need to set it
db_port =

# database name running discourse
db_name = gonano

# username accessing database
db_username = <%= ENV['DATA_DB_USER'] %>

# password used to access the db
db_password = <%= ENV['DATA_DB_PASS'] %>

# Disallow prepared statements
# see: https://github.com/rails/rails/issues/21992
db_prepared_statements = false

# host address for db replica server
db_replica_host =

# port running replica db server, defaults to 5432 if not set
db_replica_port =

# hostname running the forum
hostname = <%= ENV['DISCOURSE_HOSTNAME'] || "www.example.com" %>

# backup hostname mainly for cdn use
backup_hostname =

# address of smtp server used to send emails
smtp_address = <%= ENV['DISCOURSE_SMTP_ADDRESS'] %>

# port of smtp server used to send emails
smtp_port = <%= ENV['DISCOURSE_SMTP_PORT'] %>

# domain passed to smtp server
smtp_domain = <%= ENV['DISCOURSE_SMTP_DOMAIN'] %>

# username for smtp server
smtp_user_name = <%= ENV['DISCOURSE_SMTP_USER_NAME'] %>

# password for smtp server
smtp_password = <%= ENV['DISCOURSE_SMTP_PASSWORD'] %>

# smtp authentication mechanism
smtp_authentication = plain

# enable TLS encryption for smtp connections
smtp_enable_start_tls = true

# mode for verifying smtp server certificates
# to disable, set to 'none'
smtp_openssl_verify_mode =

# load MiniProfiler in production, to be used by developers
load_mini_profiler = true

# recommended, cdn used to access assets
cdn_url =

# comma delimited list of emails that have developer level access
developer_emails =

# redis server address
redis_host = <%= ENV['DATA_REDIS_HOST'] %>

# redis server port
redis_port = 6379

# redis slave server address
redis_slave_host =

# redis slave server port
redis_slave_port = 6379

# redis database
redis_db = 0

# redis password
redis_password =

# redis sentinels eg
# redis_sentinels = 10.0.0.1:26381,10.0.0.2:26381
redis_sentinels =

# enable Cross-origin Resource Sharing (CORS) directly at the application level
enable_cors = false
cors_origin = ''

# enable if you really need to serve assets in prd
serve_static_assets = false

# number of sidekiq workers (launched via unicorn master)
sidekiq_workers = 5

# adjust stylesheets to rtl (requires "rtlit" gem)
rtl_css = false

# notify admin when a new version of discourse is released
# this is global so it is easier to set in multisites
# TODO allow for global overrides
new_version_emails = true

# connection reaping helps keep connection counts down, postgres
# will not work properly with huge numbers of open connections
# reap connections from pool that are older than 30 seconds
connection_reaper_age = 30
# run reap check every 30 seconds
connection_reaper_interval = 30
# also reap any connections older than this
connection_reaper_max_age = 600

# set to relative URL (for subdirectory hosting)
# IMPORTANT: path must not include a trailing /
# EG: /forum
relative_url_root =

# increasing this number will increase redis memory use
# this ensures backlog (ability of channels to catch up are capped)
# message bus default cap is 1000, we are winding it down to 100
message_bus_max_backlog_size = 100

# must be a 64 byte hex string, anything else will be ignored with a warning
secret_key_base =

# fallback path for all assets which are served via the application
# used by static_controller
# in multi host setups this allows you to have old unicorn instances serve
# newly compiled assets
fallback_assets_path =