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Add support for separate Redis for cache (#7272)

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* Add support for separate Redis for cache

CACHE_REDIS_URL to allow using a different Redis server for cache
purposes, with cache-specific configuration such as key eviction

* Fix code style issues
This commit is contained in:
Eugen Rochko 2018-04-27 01:37:59 +02:00 committed by GitHub
parent 36b6631c12
commit 63553c6b5c
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2 changed files with 21 additions and 8 deletions
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2
config/environments/production.rb
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@ -52,7 +52,7 @@ Rails.application.configure do
config.log_tags = [:request_id]
# Use a different cache store in production.
config.cache_store = :redis_store, ENV['REDIS_URL'], REDIS_CACHE_PARAMS
config.cache_store = :redis_store, ENV['CACHE_REDIS_URL'], REDIS_CACHE_PARAMS
# Ignore bad email addresses and do not raise email delivery errors.
# Set this to true and configure the email server for immediate delivery to raise delivery errors.

27
lib/mastodon/redis_config.rb
View File

@ -1,16 +1,29 @@
# frozen_string_literal: true
if ENV['REDIS_URL'].blank?
password = ENV.fetch('REDIS_PASSWORD') { '' }
host = ENV.fetch('REDIS_HOST') { 'localhost' }
port = ENV.fetch('REDIS_PORT') { 6379 }
db = ENV.fetch('REDIS_DB') { 0 }
def setup_redis_env_url(prefix = nil, defaults = true)
prefix = prefix.to_s.upcase + '_' unless prefix.nil?
prefix = '' if prefix.nil?
ENV['REDIS_URL'] = "redis://#{password.blank? ? '' : ":#{password}@"}#{host}:#{port}/#{db}"
return if ENV[prefix + 'REDIS_URL'].present?
password = ENV.fetch(prefix + 'REDIS_PASSWORD') { '' if defaults }
host = ENV.fetch(prefix + 'REDIS_HOST') { 'localhost' if defaults }
port = ENV.fetch(prefix + 'REDIS_PORT') { 6379 if defaults }
db = ENV.fetch(prefix + 'REDIS_DB') { 0 if defaults }
ENV[prefix + 'REDIS_URL'] = if [password, host, port, db].all?(&:nil?)
ENV['REDIS_URL']
else
"redis://#{password.blank? ? '' : ":#{password}@"}#{host}:#{port}/#{db}"
end
end
namespace = ENV.fetch('REDIS_NAMESPACE') { nil }
setup_redis_env_url
setup_redis_env_url(:cache, false)
namespace = ENV.fetch('REDIS_NAMESPACE') { nil }
cache_namespace = namespace ? namespace + '_cache' : 'cache'
REDIS_CACHE_PARAMS = {
expires_in: 10.minutes,
namespace: cache_namespace,