mirror of
https://github.com/discourse/discourse.git
synced 2024-12-16 08:33:45 +08:00
122 lines
4.0 KiB
Ruby
122 lines
4.0 KiB
Ruby
require 'rails_helper'
|
|
|
|
describe DiscourseRedis do
|
|
let(:slave_host) { 'testhost' }
|
|
let(:slave_port) { 1234 }
|
|
|
|
let(:config) do
|
|
DiscourseRedis.config.dup.merge({
|
|
slave_host: 'testhost', slave_port: 1234, connector: DiscourseRedis::Connector
|
|
})
|
|
end
|
|
|
|
let(:fallback_handler) { DiscourseRedis::FallbackHandler.instance }
|
|
|
|
context '.slave_host' do
|
|
it 'should return the right config' do
|
|
slave_config = DiscourseRedis.slave_config(config)
|
|
expect(slave_config[:host]).to eq(slave_host)
|
|
expect(slave_config[:port]).to eq(slave_port)
|
|
end
|
|
end
|
|
|
|
context 'when redis connection is to a slave redis server' do
|
|
it 'should check the status of the master server' do
|
|
begin
|
|
fallback_handler.master = false
|
|
$redis.without_namespace.expects(:get).raises(Redis::CommandError.new("READONLY"))
|
|
fallback_handler.expects(:verify_master).once
|
|
$redis.get('test')
|
|
ensure
|
|
fallback_handler.master = true
|
|
end
|
|
end
|
|
end
|
|
|
|
describe DiscourseRedis::Connector do
|
|
let(:connector) { DiscourseRedis::Connector.new(config) }
|
|
|
|
it 'should return the master config when master is up' do
|
|
expect(connector.resolve).to eq(config)
|
|
end
|
|
|
|
it 'should return the slave config when master is down' do
|
|
begin
|
|
Redis::Client.any_instance.expects(:call).raises(Redis::CannotConnectError).once
|
|
expect { connector.resolve }.to raise_error(Redis::CannotConnectError)
|
|
|
|
config = connector.resolve
|
|
|
|
expect(config[:host]).to eq(slave_host)
|
|
expect(config[:port]).to eq(slave_port)
|
|
ensure
|
|
fallback_handler.master = true
|
|
end
|
|
end
|
|
|
|
it "should return the slave config when master's hostname cannot be resolved" do
|
|
begin
|
|
error = RuntimeError.new('Name or service not known')
|
|
|
|
Redis::Client.any_instance.expects(:call).raises(error).once
|
|
expect { connector.resolve }.to raise_error(error)
|
|
fallback_handler.instance_variable_get(:@timer_task).shutdown
|
|
expect(fallback_handler.running?).to eq(false)
|
|
|
|
config = connector.resolve
|
|
|
|
expect(config[:host]).to eq(slave_host)
|
|
expect(config[:port]).to eq(slave_port)
|
|
expect(fallback_handler.running?).to eq(true)
|
|
ensure
|
|
fallback_handler.master = true
|
|
end
|
|
end
|
|
|
|
it "should return the slave config when master is still loading data" do
|
|
begin
|
|
Redis::Client.any_instance.expects(:call).with([:info]).returns("someconfig:haha\r\nloading:1")
|
|
config = connector.resolve
|
|
|
|
expect(config[:host]).to eq(slave_host)
|
|
expect(config[:port]).to eq(slave_port)
|
|
ensure
|
|
fallback_handler.master = true
|
|
end
|
|
end
|
|
|
|
it "should raise the right error" do
|
|
error = RuntimeError.new('test error')
|
|
Redis::Client.any_instance.expects(:call).raises(error).twice
|
|
2.times { expect { connector.resolve }.to raise_error(error) }
|
|
end
|
|
end
|
|
|
|
describe DiscourseRedis::FallbackHandler do
|
|
after do
|
|
fallback_handler.master = true
|
|
end
|
|
|
|
describe '#initiate_fallback_to_master' do
|
|
it 'should return the right value if the master server is still down' do
|
|
fallback_handler.master = false
|
|
Redis::Client.any_instance.expects(:call).with([:info]).returns("Some other stuff")
|
|
expect(fallback_handler.initiate_fallback_to_master).to eq(false)
|
|
end
|
|
|
|
it 'should fallback to the master server once it is up' do
|
|
fallback_handler.master = false
|
|
Redis::Client.any_instance.expects(:call).with([:info]).returns(DiscourseRedis::FallbackHandler::MASTER_LINK_STATUS)
|
|
|
|
DiscourseRedis::FallbackHandler::CONNECTION_TYPES.each do |connection_type|
|
|
Redis::Client.any_instance.expects(:call).with([:client, [:kill, 'type', connection_type]])
|
|
end
|
|
|
|
expect(fallback_handler.initiate_fallback_to_master).to eq(true)
|
|
expect(fallback_handler.master).to eq(true)
|
|
expect(Discourse.recently_readonly?).to eq(false)
|
|
end
|
|
end
|
|
end
|
|
end
|