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Commit f7eceed6 authored by Stan Hu's avatar Stan Hu
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Merge branch 'handle-redis-not-there' into 'master'

Fix database migrations when Redis is not running

If Redis were not running or USE_DB were set to false, the application settings retrieval would fail completely. This change only attempts to use the cache if the system actually
wants to connect to the DB and rescues any failures in talking to Redis.

Closes #17557 


See merge request !4924
parents 65187efa d10642a4
......@@ -9,10 +9,14 @@ def current_application_settings
end
def ensure_application_settings!
settings = ::ApplicationSetting.cached
if connect_to_db?
begin
settings = ::ApplicationSetting.current
# In case Redis isn't running or the Redis UNIX socket file is not available
rescue ::Redis::BaseError, ::Errno::ENOENT
settings = ::ApplicationSetting.last
end
if !settings && connect_to_db?
settings = ::ApplicationSetting.current
settings ||= ::ApplicationSetting.create_from_defaults unless ActiveRecord::Migrator.needs_migration?
end
......
require 'spec_helper'
describe Gitlab::CurrentSettings do
describe '#current_application_settings' do
it 'attempts to use cached values first' do
allow_any_instance_of(Gitlab::CurrentSettings).to receive(:connect_to_db?).and_return(true)
expect(ApplicationSetting).to receive(:current).and_return(::ApplicationSetting.create_from_defaults)
expect(ApplicationSetting).not_to receive(:last)
expect(current_application_settings).to be_a(ApplicationSetting)
end
it 'does not attempt to connect to DB or Redis' do
allow_any_instance_of(Gitlab::CurrentSettings).to receive(:connect_to_db?).and_return(false)
expect(ApplicationSetting).not_to receive(:current)
expect(ApplicationSetting).not_to receive(:last)
expect(current_application_settings).to eq fake_application_settings
end
it 'falls back to DB if Redis returns an empty value' do
allow_any_instance_of(Gitlab::CurrentSettings).to receive(:connect_to_db?).and_return(true)
expect(ApplicationSetting).to receive(:last).and_call_original
expect(current_application_settings).to be_a(ApplicationSetting)
end
it 'falls back to DB if Redis fails' do
allow_any_instance_of(Gitlab::CurrentSettings).to receive(:connect_to_db?).and_return(true)
expect(ApplicationSetting).to receive(:current).and_raise(::Redis::BaseError)
expect(ApplicationSetting).to receive(:last).and_call_original
expect(current_application_settings).to be_a(ApplicationSetting)
end
end
end
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