debian-mirror-gitlab/spec/models/clusters/applications/prometheus_spec.rb
2020-04-22 19:07:51 +05:30

420 lines
13 KiB
Ruby

# frozen_string_literal: true
require 'spec_helper'
describe Clusters::Applications::Prometheus do
include KubernetesHelpers
include StubRequests
include_examples 'cluster application core specs', :clusters_applications_prometheus
include_examples 'cluster application status specs', :clusters_applications_prometheus
include_examples 'cluster application version specs', :clusters_applications_prometheus
include_examples 'cluster application helm specs', :clusters_applications_prometheus
include_examples 'cluster application initial status specs'
describe 'after_destroy' do
context 'cluster type is project' do
let(:cluster) { create(:cluster, :with_installed_helm) }
let(:application) { create(:clusters_applications_prometheus, :installed, cluster: cluster) }
it 'deactivates prometheus_service after destroy' do
expect(Clusters::Applications::DeactivateServiceWorker)
.to receive(:perform_async).with(cluster.id, 'prometheus')
application.destroy!
end
end
end
describe 'transition to installed' do
let(:project) { create(:project) }
let(:cluster) { create(:cluster, :with_installed_helm) }
let(:application) { create(:clusters_applications_prometheus, :installing, cluster: cluster) }
it 'schedules post installation job' do
expect(Clusters::Applications::ActivateServiceWorker)
.to receive(:perform_async).with(cluster.id, 'prometheus')
application.make_installed
end
end
describe 'transition to updating' do
let(:project) { create(:project) }
let(:cluster) { create(:cluster, projects: [project]) }
subject { create(:clusters_applications_prometheus, :installed, cluster: cluster) }
it 'sets last_update_started_at to now' do
Timecop.freeze do
expect { subject.make_updating }.to change { subject.reload.last_update_started_at }.to be_within(1.second).of(Time.now)
end
end
end
describe '#can_uninstall?' do
let(:prometheus) { create(:clusters_applications_prometheus) }
subject { prometheus.can_uninstall? }
it { is_expected.to be_truthy }
end
describe '#prometheus_client' do
shared_examples 'exception caught for prometheus client' do
before do
allow(kube_client).to receive(:proxy_url).and_raise(exception)
end
it 'returns nil' do
expect(subject.prometheus_client).to be_nil
end
end
context 'cluster is nil' do
it 'returns nil' do
expect(subject.cluster).to be_nil
expect(subject.prometheus_client).to be_nil
end
end
context "cluster doesn't have kubeclient" do
let(:cluster) { create(:cluster) }
subject { create(:clusters_applications_prometheus, cluster: cluster) }
it 'returns nil' do
expect(subject.prometheus_client).to be_nil
end
end
context 'cluster has kubeclient' do
let(:cluster) { create(:cluster, :project, :provided_by_gcp) }
let(:kubernetes_url) { subject.cluster.platform_kubernetes.api_url }
let(:kube_client) { subject.cluster.kubeclient.core_client }
subject { create(:clusters_applications_prometheus, cluster: cluster) }
before do
subject.cluster.platform_kubernetes.namespace = 'a-namespace'
stub_kubeclient_discover(cluster.platform_kubernetes.api_url)
create(:cluster_kubernetes_namespace,
cluster: cluster,
cluster_project: cluster.cluster_project,
project: cluster.cluster_project.project)
end
it 'creates proxy prometheus_client' do
expect(subject.prometheus_client).to be_instance_of(Gitlab::PrometheusClient)
end
it 'copies proxy_url, options and headers from kube client to prometheus_client' do
expect(Gitlab::PrometheusClient)
.to(receive(:new))
.with(a_valid_url, kube_client.rest_client.options.merge(headers: kube_client.headers))
subject.prometheus_client
end
context 'when cluster is not reachable' do
it_behaves_like 'exception caught for prometheus client' do
let(:exception) { Kubeclient::HttpError.new(401, 'Unauthorized', nil) }
end
end
context 'when there is a socket error while contacting cluster' do
it_behaves_like 'exception caught for prometheus client' do
let(:exception) { Errno::ECONNREFUSED }
end
it_behaves_like 'exception caught for prometheus client' do
let(:exception) { Errno::ECONNRESET }
end
end
context 'when the network is unreachable' do
it_behaves_like 'exception caught for prometheus client' do
let(:exception) { Errno::ENETUNREACH }
end
end
end
end
describe '#install_command' do
let(:prometheus) { create(:clusters_applications_prometheus) }
subject { prometheus.install_command }
it { is_expected.to be_an_instance_of(Gitlab::Kubernetes::Helm::InstallCommand) }
it 'is initialized with 3 arguments' do
expect(subject.name).to eq('prometheus')
expect(subject.chart).to eq('stable/prometheus')
expect(subject.version).to eq('9.5.2')
expect(subject).to be_rbac
expect(subject.files).to eq(prometheus.files)
end
context 'on a non rbac enabled cluster' do
before do
prometheus.cluster.platform_kubernetes.abac!
end
it { is_expected.not_to be_rbac }
end
context 'application failed to install previously' do
let(:prometheus) { create(:clusters_applications_prometheus, :errored, version: '2.0.0') }
it 'is initialized with the locked version' do
expect(subject.version).to eq('9.5.2')
end
end
it 'does not install knative metrics' do
expect(subject.postinstall).to be_empty
end
context 'with knative installed' do
let(:knative) { create(:clusters_applications_knative, :updated ) }
let(:prometheus) { create(:clusters_applications_prometheus, cluster: knative.cluster) }
subject { prometheus.install_command }
it 'installs knative metrics' do
expect(subject.postinstall).to include("kubectl apply -f #{Clusters::Applications::Knative::METRICS_CONFIG}")
end
end
end
describe '#uninstall_command' do
let(:prometheus) { create(:clusters_applications_prometheus) }
subject { prometheus.uninstall_command }
it { is_expected.to be_an_instance_of(Gitlab::Kubernetes::Helm::DeleteCommand) }
it 'has the application name' do
expect(subject.name).to eq('prometheus')
end
it 'has files' do
expect(subject.files).to eq(prometheus.files)
end
it 'is rbac' do
expect(subject).to be_rbac
end
describe '#predelete' do
let(:knative) { create(:clusters_applications_knative, :updated ) }
let(:prometheus) { create(:clusters_applications_prometheus, cluster: knative.cluster) }
subject { prometheus.uninstall_command.predelete }
it 'deletes knative metrics' do
metrics_config = Clusters::Applications::Knative::METRICS_CONFIG
is_expected.to include("kubectl delete -f #{metrics_config} --ignore-not-found")
end
end
context 'on a non rbac enabled cluster' do
before do
prometheus.cluster.platform_kubernetes.abac!
end
it { is_expected.not_to be_rbac }
end
end
describe '#patch_command' do
subject(:patch_command) { prometheus.patch_command(values) }
let(:prometheus) { build(:clusters_applications_prometheus) }
let(:values) { prometheus.values }
it { is_expected.to be_an_instance_of(::Gitlab::Kubernetes::Helm::PatchCommand) }
it 'is initialized with 3 arguments' do
expect(patch_command.name).to eq('prometheus')
expect(patch_command.chart).to eq('stable/prometheus')
expect(patch_command.version).to eq('9.5.2')
expect(patch_command.files).to eq(prometheus.files)
end
end
describe '#update_in_progress?' do
context 'when app is updating' do
it 'returns true' do
cluster = create(:cluster)
prometheus_app = build(:clusters_applications_prometheus, :updating, cluster: cluster)
expect(prometheus_app.update_in_progress?).to be true
end
end
end
describe '#update_errored?' do
context 'when app errored' do
it 'returns true' do
cluster = create(:cluster)
prometheus_app = build(:clusters_applications_prometheus, :update_errored, cluster: cluster)
expect(prometheus_app.update_errored?).to be true
end
end
end
describe '#files' do
let(:application) { create(:clusters_applications_prometheus) }
let(:values) { subject[:'values.yaml'] }
subject { application.files }
it 'includes prometheus valid values' do
expect(values).to include('alertmanager')
expect(values).to include('kubeStateMetrics')
expect(values).to include('nodeExporter')
expect(values).to include('pushgateway')
expect(values).to include('serverFiles')
end
end
describe '#files_with_replaced_values' do
let(:application) { build(:clusters_applications_prometheus) }
let(:files) { application.files }
subject { application.files_with_replaced_values({ hello: :world }) }
it 'does not modify #files' do
expect(subject[:'values.yaml']).not_to eq(files[:'values.yaml'])
expect(files[:'values.yaml']).to eq(application.values)
end
it 'returns values.yaml with replaced values' do
expect(subject[:'values.yaml']).to eq({ hello: :world })
end
it 'uses values from #files, except for values.yaml' do
allow(application).to receive(:files).and_return({
'values.yaml': 'some value specific to files',
'file_a.txt': 'file_a',
'file_b.txt': 'file_b'
})
expect(subject.except(:'values.yaml')).to eq({
'file_a.txt': 'file_a',
'file_b.txt': 'file_b'
})
end
end
describe '#configured?' do
let(:prometheus) { create(:clusters_applications_prometheus, :installed, cluster: cluster) }
subject { prometheus.configured? }
context 'when a kubenetes client is present' do
let(:cluster) { create(:cluster, :project, :provided_by_gcp) }
it { is_expected.to be_truthy }
context 'when it is not availalble' do
let(:prometheus) { create(:clusters_applications_prometheus, cluster: cluster) }
it { is_expected.to be_falsey }
end
context 'when the kubernetes URL is blocked' do
before do
blocked_ip = '127.0.0.1' # localhost addresses are blocked by default
stub_all_dns(cluster.platform.api_url, ip_address: blocked_ip)
end
it { is_expected.to be_falsey }
end
end
context 'when a kubenetes client is not present' do
let(:cluster) { create(:cluster) }
it { is_expected.to be_falsy }
end
end
describe '#updated_since?' do
let(:cluster) { create(:cluster) }
let(:prometheus_app) { build(:clusters_applications_prometheus, cluster: cluster) }
let(:timestamp) { Time.now - 5.minutes }
around do |example|
Timecop.freeze { example.run }
end
before do
prometheus_app.last_update_started_at = Time.now
end
context 'when app does not have status failed' do
it 'returns true when last update started after the timestamp' do
expect(prometheus_app.updated_since?(timestamp)).to be true
end
it 'returns false when last update started before the timestamp' do
expect(prometheus_app.updated_since?(Time.now + 5.minutes)).to be false
end
end
context 'when app has status failed' do
it 'returns false when last update started after the timestamp' do
prometheus_app.status = 6
expect(prometheus_app.updated_since?(timestamp)).to be false
end
end
end
describe 'alert manager token' do
subject { create(:clusters_applications_prometheus) }
context 'when not set' do
it 'is empty by default' do
expect(subject.alert_manager_token).to be_nil
expect(subject.encrypted_alert_manager_token).to be_nil
expect(subject.encrypted_alert_manager_token_iv).to be_nil
end
describe '#generate_alert_manager_token!' do
it 'generates a token' do
subject.generate_alert_manager_token!
expect(subject.alert_manager_token).to match(/\A\h{32}\z/)
end
end
end
context 'when set' do
let(:token) { SecureRandom.hex }
before do
subject.update!(alert_manager_token: token)
end
it 'reads the token' do
expect(subject.alert_manager_token).to eq(token)
expect(subject.encrypted_alert_manager_token).not_to be_nil
expect(subject.encrypted_alert_manager_token_iv).not_to be_nil
end
describe '#generate_alert_manager_token!' do
it 'does not re-generate the token' do
subject.generate_alert_manager_token!
expect(subject.alert_manager_token).to eq(token)
end
end
end
end
end