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require 'spec_helper'
describe Gitlab::HealthChecks::FsShardsCheck do
def command_exists?(command)
_, status = Gitlab::Popen.popen(%W{ #{command} 1 echo })
status.zero?
rescue Errno::ENOENT
false
end
def timeout_command
@timeout_command ||=
if command_exists?('timeout')
'timeout'
elsif command_exists?('gtimeout')
'gtimeout'
else
''
end
end
let(:metric_class) { Gitlab::HealthChecks::Metric }
let(:result_class) { Gitlab::HealthChecks::Result }
let(:repository_storages) { ['default'] }
let(:tmp_dir) { Dir.mktmpdir }
let(:storages_paths) do
{
default: Gitlab::GitalyClient::StorageSettings.new('path' => tmp_dir)
}.with_indifferent_access
end
before do
allow(described_class).to receive(:repository_storages) { repository_storages }
allow(described_class).to receive(:storages_paths) { storages_paths }
stub_const('Gitlab::HealthChecks::FsShardsCheck::TIMEOUT_EXECUTABLE', timeout_command)
end
after do
FileUtils.remove_entry_secure(tmp_dir) if Dir.exist?(tmp_dir)
end
shared_examples 'filesystem checks' do
describe '#readiness' do
subject { described_class.readiness }
context 'storage has a tripped circuitbreaker', :broken_storage do
let(:repository_storages) { ['broken'] }
let(:storages_paths) do
Gitlab.config.repositories.storages
end
it { is_expected.to include(result_class.new(false, 'circuitbreaker tripped', shard: 'broken')) }
end
context 'storage points to not existing folder' do
let(:storages_paths) do
{
default: Gitlab::GitalyClient::StorageSettings.new('path' => 'tmp/this/path/doesnt/exist')
}.with_indifferent_access
end
before do
allow(described_class).to receive(:storage_circuitbreaker_test) { true }
end
it { is_expected.to include(result_class.new(false, 'cannot stat storage', shard: 'default')) }
end
context 'storage points to directory that has both read and write rights' do
before do
FileUtils.chmod_R(0755, tmp_dir)
end
it { is_expected.to include(result_class.new(true, nil, shard: 'default')) }
it 'cleans up files used for testing' do
expect(described_class).to receive(:storage_write_test).with(any_args).and_call_original
expect { subject }.not_to change(Dir.entries(tmp_dir), :count)
end
context 'read test fails' do
before do
allow(described_class).to receive(:storage_read_test).with(any_args).and_return(false)
end
it { is_expected.to include(result_class.new(false, 'cannot read from storage', shard: 'default')) }
end
context 'write test fails' do
before do
allow(described_class).to receive(:storage_write_test).with(any_args).and_return(false)
end
it { is_expected.to include(result_class.new(false, 'cannot write to storage', shard: 'default')) }
end
end
end
describe '#metrics' do
context 'storage points to not existing folder' do
let(:storages_paths) do
{
default: Gitlab::GitalyClient::StorageSettings.new('path' => 'tmp/this/path/doesnt/exist')
}.with_indifferent_access
end
it 'provides metrics' do
metrics = described_class.metrics
expect(metrics).to all(have_attributes(labels: { shard: 'default' }))
expect(metrics).to include(an_object_having_attributes(name: :filesystem_accessible, value: 0))
expect(metrics).to include(an_object_having_attributes(name: :filesystem_readable, value: 0))
expect(metrics).to include(an_object_having_attributes(name: :filesystem_writable, value: 0))
expect(metrics).to include(an_object_having_attributes(name: :filesystem_access_latency_seconds, value: be >= 0))
expect(metrics).to include(an_object_having_attributes(name: :filesystem_read_latency_seconds, value: be >= 0))
expect(metrics).to include(an_object_having_attributes(name: :filesystem_write_latency_seconds, value: be >= 0))
expect(metrics).to include(an_object_having_attributes(name: :filesystem_circuitbreaker_latency_seconds, value: be >= 0))
end
end
context 'storage points to directory that has both read and write rights' do
before do
FileUtils.chmod_R(0755, tmp_dir)
end
it 'provides metrics' do
metrics = described_class.metrics
expect(metrics).to all(have_attributes(labels: { shard: 'default' }))
expect(metrics).to include(an_object_having_attributes(name: :filesystem_accessible, value: 1))
expect(metrics).to include(an_object_having_attributes(name: :filesystem_readable, value: 1))
expect(metrics).to include(an_object_having_attributes(name: :filesystem_writable, value: 1))
expect(metrics).to include(an_object_having_attributes(name: :filesystem_access_latency_seconds, value: be >= 0))
expect(metrics).to include(an_object_having_attributes(name: :filesystem_read_latency_seconds, value: be >= 0))
expect(metrics).to include(an_object_having_attributes(name: :filesystem_write_latency_seconds, value: be >= 0))
expect(metrics).to include(an_object_having_attributes(name: :filesystem_circuitbreaker_latency_seconds, value: be >= 0))
end
it 'cleans up files used for metrics' do
expect { described_class.metrics }.not_to change(Dir.entries(tmp_dir), :count)
end
end
end
end
context 'when timeout kills fs checks' do
before do
stub_const('Gitlab::HealthChecks::FsShardsCheck::COMMAND_TIMEOUT', '1')
allow(described_class).to receive(:exec_with_timeout).and_wrap_original { |m| m.call(%w(sleep 60)) }
FileUtils.chmod_R(0755, tmp_dir)
end
describe '#readiness' do
subject { described_class.readiness }
it { is_expected.to include(result_class.new(false, 'cannot stat storage', shard: 'default')) }
end
describe '#metrics' do
it 'provides metrics' do
metrics = described_class.metrics
expect(metrics).to all(have_attributes(labels: { shard: 'default' }))
expect(metrics).to include(an_object_having_attributes(name: :filesystem_accessible, value: 0))
expect(metrics).to include(an_object_having_attributes(name: :filesystem_readable, value: 0))
expect(metrics).to include(an_object_having_attributes(name: :filesystem_writable, value: 0))
expect(metrics).to include(an_object_having_attributes(name: :filesystem_access_latency_seconds, value: be >= 0))
expect(metrics).to include(an_object_having_attributes(name: :filesystem_read_latency_seconds, value: be >= 0))
expect(metrics).to include(an_object_having_attributes(name: :filesystem_write_latency_seconds, value: be >= 0))
end
end
end
context 'when popen always finds required binaries' do
before do
allow(described_class).to receive(:exec_with_timeout).and_wrap_original do |method, *args, &block|
begin
method.call(*args, &block)
rescue RuntimeError, Errno::ENOENT
raise 'expected not to happen'
end
end
stub_const('Gitlab::HealthChecks::FsShardsCheck::COMMAND_TIMEOUT', '10')
end
it_behaves_like 'filesystem checks'
end
context 'when popen never finds required binaries' do
before do
allow(Gitlab::Popen).to receive(:popen).and_raise(Errno::ENOENT)
end
it_behaves_like 'filesystem checks'
end
end
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