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DEV: Use rails_failover gem for ActiveRecord and Redis failover handling

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This commit is contained in:
Guo Xiang Tan
2020-06-11 13:45:46 +08:00
parent 6780d4d70c
commit 58e52c0e4f
11 changed files with 84 additions and 466 deletions
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32
lib/discourse.rb
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@ -428,19 +428,21 @@ module Discourse
alias_method :base_url_no_path, :base_url_no_prefix
end
READONLY_MODE_KEY_TTL ||= 60
READONLY_MODE_KEY ||= 'readonly_mode'
PG_READONLY_MODE_KEY ||= 'readonly_mode:postgres'
USER_READONLY_MODE_KEY ||= 'readonly_mode:user'
READONLY_MODE_KEY_TTL ||= 60
READONLY_MODE_KEY ||= 'readonly_mode'
PG_READONLY_MODE_KEY ||= 'readonly_mode:postgres'
USER_READONLY_MODE_KEY ||= 'readonly_mode:user'
PG_FORCE_READONLY_MODE_KEY ||= 'readonly_mode:postgres_force'
READONLY_KEYS ||= [
READONLY_MODE_KEY,
PG_READONLY_MODE_KEY,
USER_READONLY_MODE_KEY
USER_READONLY_MODE_KEY,
PG_FORCE_READONLY_MODE_KEY
]
def self.enable_readonly_mode(key = READONLY_MODE_KEY)
if key == USER_READONLY_MODE_KEY
if key == USER_READONLY_MODE_KEY || key == PG_FORCE_READONLY_MODE_KEY
Discourse.redis.set(key, 1)
else
Discourse.redis.setex(key, READONLY_MODE_KEY_TTL, 1)
@ -486,6 +488,24 @@ module Discourse
true
end
def self.enable_pg_force_readonly_mode
RailsMultisite::ConnectionManagement.each_connection do
enable_readonly_mode(PG_FORCE_READONLY_MODE_KEY)
Sidekiq.pause!("pg_failover") if !Sidekiq.paused?
end
true
end
def self.disable_pg_force_readonly_mode
RailsMultisite::ConnectionManagement.each_connection do
disable_readonly_mode(PG_FORCE_READONLY_MODE_KEY)
Sidekiq.unpause!
end
true
end
def self.readonly_mode?(keys = READONLY_KEYS)
recently_readonly? || Discourse.redis.exists?(*keys)
end