mirror of https://github.com/linkerd/linkerd2.git
597 lines
18 KiB
Go
597 lines
18 KiB
Go
package public
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import (
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"context"
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"errors"
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"fmt"
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"io"
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"reflect"
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"sort"
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"sync"
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"time"
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destinationPb "github.com/linkerd/linkerd2-proxy-api/go/destination"
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"github.com/linkerd/linkerd2-proxy-api/go/net"
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healthcheckPb "github.com/linkerd/linkerd2/controller/gen/common/healthcheck"
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configPb "github.com/linkerd/linkerd2/controller/gen/config"
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pb "github.com/linkerd/linkerd2/controller/gen/public"
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"github.com/linkerd/linkerd2/controller/k8s"
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"github.com/prometheus/client_golang/api"
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promv1 "github.com/prometheus/client_golang/api/prometheus/v1"
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"github.com/prometheus/common/model"
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"google.golang.org/grpc"
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)
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// MockAPIClient satisfies the Public API's gRPC interfaces (public.APIClient).
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type MockAPIClient struct {
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ErrorToReturn error
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VersionInfoToReturn *pb.VersionInfo
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ListPodsResponseToReturn *pb.ListPodsResponse
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ListServicesResponseToReturn *pb.ListServicesResponse
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StatSummaryResponseToReturn *pb.StatSummaryResponse
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TopRoutesResponseToReturn *pb.TopRoutesResponse
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EdgesResponseToReturn *pb.EdgesResponse
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SelfCheckResponseToReturn *healthcheckPb.SelfCheckResponse
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ConfigResponseToReturn *configPb.All
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APITapClientToReturn pb.Api_TapClient
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APITapByResourceClientToReturn pb.Api_TapByResourceClient
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DestinationGetClientToReturn destinationPb.Destination_GetClient
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}
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// StatSummary provides a mock of a Public API method.
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func (c *MockAPIClient) StatSummary(ctx context.Context, in *pb.StatSummaryRequest, opts ...grpc.CallOption) (*pb.StatSummaryResponse, error) {
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return c.StatSummaryResponseToReturn, c.ErrorToReturn
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}
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// TopRoutes provides a mock of a Public API method.
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func (c *MockAPIClient) TopRoutes(ctx context.Context, in *pb.TopRoutesRequest, opts ...grpc.CallOption) (*pb.TopRoutesResponse, error) {
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return c.TopRoutesResponseToReturn, c.ErrorToReturn
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}
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// Edges provides a mock of a Public API method.
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func (c *MockAPIClient) Edges(ctx context.Context, in *pb.EdgesRequest, opts ...grpc.CallOption) (*pb.EdgesResponse, error) {
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return c.EdgesResponseToReturn, c.ErrorToReturn
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}
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// Version provides a mock of a Public API method.
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func (c *MockAPIClient) Version(ctx context.Context, in *pb.Empty, opts ...grpc.CallOption) (*pb.VersionInfo, error) {
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return c.VersionInfoToReturn, c.ErrorToReturn
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}
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// ListPods provides a mock of a Public API method.
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func (c *MockAPIClient) ListPods(ctx context.Context, in *pb.ListPodsRequest, opts ...grpc.CallOption) (*pb.ListPodsResponse, error) {
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return c.ListPodsResponseToReturn, c.ErrorToReturn
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}
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// ListServices provides a mock of a Public API method.
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func (c *MockAPIClient) ListServices(ctx context.Context, in *pb.ListServicesRequest, opts ...grpc.CallOption) (*pb.ListServicesResponse, error) {
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return c.ListServicesResponseToReturn, c.ErrorToReturn
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}
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// Tap provides a mock of a Public API method.
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func (c *MockAPIClient) Tap(ctx context.Context, in *pb.TapRequest, opts ...grpc.CallOption) (pb.Api_TapClient, error) {
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return c.APITapClientToReturn, c.ErrorToReturn
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}
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// TapByResource provides a mock of a Public API method.
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func (c *MockAPIClient) TapByResource(ctx context.Context, in *pb.TapByResourceRequest, opts ...grpc.CallOption) (pb.Api_TapByResourceClient, error) {
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return c.APITapByResourceClientToReturn, c.ErrorToReturn
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}
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// Get provides a mock of a Public API method.
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func (c *MockAPIClient) Get(ctx context.Context, in *destinationPb.GetDestination, opts ...grpc.CallOption) (destinationPb.Destination_GetClient, error) {
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return c.DestinationGetClientToReturn, c.ErrorToReturn
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}
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// GetProfile provides a mock of a Public API method
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func (c *MockAPIClient) GetProfile(ctx context.Context, _ *destinationPb.GetDestination, _ ...grpc.CallOption) (destinationPb.Destination_GetProfileClient, error) {
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// Not implemented through this client. The proxies use the gRPC server directly instead.
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return nil, errors.New("Not implemented")
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}
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// SelfCheck provides a mock of a Public API method.
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func (c *MockAPIClient) SelfCheck(ctx context.Context, in *healthcheckPb.SelfCheckRequest, _ ...grpc.CallOption) (*healthcheckPb.SelfCheckResponse, error) {
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return c.SelfCheckResponseToReturn, c.ErrorToReturn
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}
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// Config provides a mock of a Public API method.
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func (c *MockAPIClient) Config(ctx context.Context, in *pb.Empty, _ ...grpc.CallOption) (*configPb.All, error) {
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return c.ConfigResponseToReturn, c.ErrorToReturn
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}
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// MockDestinationGetClient satisfies the Destination_GetClient gRPC interface.
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type MockDestinationGetClient struct {
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UpdatesToReturn []destinationPb.Update
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ErrorsToReturn []error
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grpc.ClientStream
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sync.Mutex
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}
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// Recv satisfies the Destination_GetClient.Recv() gRPC method.
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func (a *MockDestinationGetClient) Recv() (*destinationPb.Update, error) {
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a.Lock()
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defer a.Unlock()
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var updatePopped destinationPb.Update
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var errorPopped error
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if len(a.UpdatesToReturn) == 0 && len(a.ErrorsToReturn) == 0 {
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return nil, io.EOF
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}
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if len(a.UpdatesToReturn) != 0 {
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updatePopped, a.UpdatesToReturn = a.UpdatesToReturn[0], a.UpdatesToReturn[1:]
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}
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if len(a.ErrorsToReturn) != 0 {
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errorPopped, a.ErrorsToReturn = a.ErrorsToReturn[0], a.ErrorsToReturn[1:]
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}
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return &updatePopped, errorPopped
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}
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// AuthorityEndpoints holds the details for the Endpoints associated to an authority
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type AuthorityEndpoints struct {
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Namespace string
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ServiceID string
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Pods []PodDetails
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}
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// PodDetails holds the details for pod associated to an Endpoint
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type PodDetails struct {
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Name string
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IP uint32
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Port uint32
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}
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// BuildAddrSet converts AuthorityEndpoints into its protobuf representation
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func BuildAddrSet(endpoint AuthorityEndpoints) *destinationPb.WeightedAddrSet {
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addrs := make([]*destinationPb.WeightedAddr, 0)
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for _, pod := range endpoint.Pods {
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addr := &net.TcpAddress{
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Ip: &net.IPAddress{Ip: &net.IPAddress_Ipv4{Ipv4: pod.IP}},
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Port: pod.Port,
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}
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labels := map[string]string{"pod": pod.Name}
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weightedAddr := &destinationPb.WeightedAddr{Addr: addr, MetricLabels: labels}
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addrs = append(addrs, weightedAddr)
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}
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labels := map[string]string{"namespace": endpoint.Namespace, "service": endpoint.ServiceID}
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return &destinationPb.WeightedAddrSet{Addrs: addrs, MetricLabels: labels}
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}
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//
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// Prometheus client
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//
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// MockProm satisfies the promv1.API interface for testing.
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// TODO: move this into something shared under /controller, or into /pkg
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type MockProm struct {
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Res model.Value
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QueriesExecuted []string // expose the queries our Mock Prometheus receives, to test query generation
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rwLock sync.Mutex
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}
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// PodCounts is a test helper struct that is used for representing data in a
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// StatTable.PodGroup.Row.
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type PodCounts struct {
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Status string
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MeshedPods uint64
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RunningPods uint64
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FailedPods uint64
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Errors map[string]*pb.PodErrors
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}
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// Query performs a query for the given time.
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func (m *MockProm) Query(ctx context.Context, query string, ts time.Time) (model.Value, api.Warnings, error) {
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m.rwLock.Lock()
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defer m.rwLock.Unlock()
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m.QueriesExecuted = append(m.QueriesExecuted, query)
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return m.Res, nil, nil
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}
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// QueryRange performs a query for the given range.
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func (m *MockProm) QueryRange(ctx context.Context, query string, r promv1.Range) (model.Value, api.Warnings, error) {
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m.rwLock.Lock()
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defer m.rwLock.Unlock()
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m.QueriesExecuted = append(m.QueriesExecuted, query)
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return m.Res, nil, nil
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}
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// AlertManagers returns an overview of the current state of the Prometheus alert
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// manager discovery.
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func (m *MockProm) AlertManagers(ctx context.Context) (promv1.AlertManagersResult, error) {
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return promv1.AlertManagersResult{}, nil
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}
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// Alerts returns a list of all active alerts.
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func (m *MockProm) Alerts(ctx context.Context) (promv1.AlertsResult, error) {
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return promv1.AlertsResult{}, nil
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}
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// CleanTombstones removes the deleted data from disk and cleans up the existing
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// tombstones.
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func (m *MockProm) CleanTombstones(ctx context.Context) error {
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return nil
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}
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// Config returns the current Prometheus configuration.
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func (m *MockProm) Config(ctx context.Context) (promv1.ConfigResult, error) {
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return promv1.ConfigResult{}, nil
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}
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// DeleteSeries deletes data for a selection of series in a time range.
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func (m *MockProm) DeleteSeries(ctx context.Context, matches []string, startTime time.Time, endTime time.Time) error {
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return nil
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}
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// Flags returns the flag values that Prometheus was launched with.
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func (m *MockProm) Flags(ctx context.Context) (promv1.FlagsResult, error) {
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return promv1.FlagsResult{}, nil
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}
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// LabelValues performs a query for the values of the given label.
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func (m *MockProm) LabelValues(ctx context.Context, label string) (model.LabelValues, api.Warnings, error) {
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return nil, nil, nil
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}
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// Series finds series by label matchers.
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func (m *MockProm) Series(ctx context.Context, matches []string, startTime time.Time, endTime time.Time) ([]model.LabelSet, api.Warnings, error) {
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return nil, nil, nil
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}
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// Snapshot creates a snapshot of all current data into
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// snapshots/<datetime>-<rand> under the TSDB's data directory and returns the
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// directory as response.
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func (m *MockProm) Snapshot(ctx context.Context, skipHead bool) (promv1.SnapshotResult, error) {
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return promv1.SnapshotResult{}, nil
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}
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// Targets returns an overview of the current state of the Prometheus target
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// discovery.
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func (m *MockProm) Targets(ctx context.Context) (promv1.TargetsResult, error) {
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return promv1.TargetsResult{}, nil
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}
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// LabelNames returns all the unique label names present in the block in sorted order.
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func (m *MockProm) LabelNames(ctx context.Context) ([]string, api.Warnings, error) {
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return []string{}, nil, nil
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}
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// Rules returns a list of alerting and recording rules that are currently loaded.
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func (m *MockProm) Rules(ctx context.Context) (promv1.RulesResult, error) {
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return promv1.RulesResult{}, nil
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}
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// TargetsMetadata returns metadata about metrics currently scraped by the target.
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func (m *MockProm) TargetsMetadata(ctx context.Context, matchTarget string, metric string, limit string) ([]promv1.MetricMetadata, error) {
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return []promv1.MetricMetadata{}, nil
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}
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// GenStatSummaryResponse generates a mock Public API StatSummaryResponse
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// object.
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func GenStatSummaryResponse(resName, resType string, resNs []string, counts *PodCounts, basicStats bool, tcpStats bool) pb.StatSummaryResponse {
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rows := []*pb.StatTable_PodGroup_Row{}
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for _, ns := range resNs {
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statTableRow := &pb.StatTable_PodGroup_Row{
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Resource: &pb.Resource{
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Namespace: ns,
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Type: resType,
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Name: resName,
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},
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TimeWindow: "1m",
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}
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if basicStats {
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statTableRow.Stats = &pb.BasicStats{
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SuccessCount: 123,
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FailureCount: 0,
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LatencyMsP50: 123,
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LatencyMsP95: 123,
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LatencyMsP99: 123,
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}
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}
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if tcpStats {
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statTableRow.TcpStats = &pb.TcpStats{
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OpenConnections: 123,
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ReadBytesTotal: 123,
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WriteBytesTotal: 123,
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}
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}
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if counts != nil {
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statTableRow.MeshedPodCount = counts.MeshedPods
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statTableRow.RunningPodCount = counts.RunningPods
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statTableRow.FailedPodCount = counts.FailedPods
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statTableRow.Status = counts.Status
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statTableRow.ErrorsByPod = counts.Errors
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}
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rows = append(rows, statTableRow)
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}
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resp := pb.StatSummaryResponse{
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Response: &pb.StatSummaryResponse_Ok_{ // https://github.com/golang/protobuf/issues/205
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Ok: &pb.StatSummaryResponse_Ok{
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StatTables: []*pb.StatTable{
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{
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Table: &pb.StatTable_PodGroup_{
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PodGroup: &pb.StatTable_PodGroup{
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Rows: rows,
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},
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},
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},
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},
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},
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},
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}
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return resp
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}
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// GenStatTsResponse generates a mock Public API StatSummaryResponse
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// object in response to a request for trafficsplit stats.
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func GenStatTsResponse(resName, resType string, resNs []string, basicStats bool, tsStats bool) pb.StatSummaryResponse {
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leaves := map[string]string{
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"service-1": "900m",
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"service-2": "100m",
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}
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apex := "apex_name"
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rows := []*pb.StatTable_PodGroup_Row{}
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for _, ns := range resNs {
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for name, weight := range leaves {
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statTableRow := &pb.StatTable_PodGroup_Row{
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Resource: &pb.Resource{
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Namespace: ns,
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Type: resType,
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Name: resName,
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},
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TimeWindow: "1m",
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}
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if basicStats {
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statTableRow.Stats = &pb.BasicStats{
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SuccessCount: 123,
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FailureCount: 0,
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LatencyMsP50: 123,
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LatencyMsP95: 123,
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LatencyMsP99: 123,
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}
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}
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if tsStats {
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statTableRow.TsStats = &pb.TrafficSplitStats{
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Apex: apex,
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Leaf: name,
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Weight: weight,
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}
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}
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rows = append(rows, statTableRow)
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}
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}
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// sort rows before returning in order to have a consistent order for tests
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rows = sortTrafficSplitRows(rows)
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resp := pb.StatSummaryResponse{
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Response: &pb.StatSummaryResponse_Ok_{ // https://github.com/golang/protobuf/issues/205
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Ok: &pb.StatSummaryResponse_Ok{
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StatTables: []*pb.StatTable{
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{
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Table: &pb.StatTable_PodGroup_{
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PodGroup: &pb.StatTable_PodGroup{
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Rows: rows,
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},
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},
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},
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},
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},
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},
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}
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return resp
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}
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type mockEdgeRow struct {
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resourceType string
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src string
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dst string
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srcNamespace string
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dstNamespace string
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clientID string
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serverID string
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msg string
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}
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// a slice of edge rows to generate mock results
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var emojivotoEdgeRows = []*mockEdgeRow{
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{
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resourceType: "deployment",
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src: "web",
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dst: "voting",
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srcNamespace: "emojivoto",
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dstNamespace: "emojivoto",
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clientID: "web.emojivoto.serviceaccount.identity.linkerd.cluster.local",
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serverID: "voting.emojivoto.serviceaccount.identity.linkerd.cluster.local",
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msg: "",
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},
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{
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resourceType: "deployment",
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src: "vote-bot",
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dst: "web",
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srcNamespace: "emojivoto",
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dstNamespace: "emojivoto",
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clientID: "default.emojivoto.serviceaccount.identity.linkerd.cluster.local",
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serverID: "web.emojivoto.serviceaccount.identity.linkerd.cluster.local",
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msg: "",
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},
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{
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resourceType: "deployment",
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src: "web",
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dst: "emoji",
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srcNamespace: "emojivoto",
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dstNamespace: "emojivoto",
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clientID: "web.emojivoto.serviceaccount.identity.linkerd.cluster.local",
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serverID: "emoji.emojivoto.serviceaccount.identity.linkerd.cluster.local",
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msg: "",
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},
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}
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// a slice of edge rows to generate mock results
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var linkerdEdgeRows = []*mockEdgeRow{
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{
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resourceType: "deployment",
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src: "linkerd-controller",
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dst: "linkerd-prometheus",
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srcNamespace: "linkerd",
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dstNamespace: "linkerd",
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clientID: "linkerd-controller.linkerd.identity.linkerd.cluster.local",
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serverID: "linkerd-prometheus.linkerd.identity.linkerd.cluster.local",
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msg: "",
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},
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}
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// GenEdgesResponse generates a mock Public API EdgesResponse
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// object.
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func GenEdgesResponse(resourceType string, edgeRowNamespace string) pb.EdgesResponse {
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edgeRows := emojivotoEdgeRows
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if edgeRowNamespace == "linkerd" {
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edgeRows = linkerdEdgeRows
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} else if edgeRowNamespace == "all" {
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// combine emojivotoEdgeRows and linkerdEdgeRows
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edgeRows = append(edgeRows, linkerdEdgeRows...)
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}
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edges := []*pb.Edge{}
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for _, row := range edgeRows {
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edge := &pb.Edge{
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Src: &pb.Resource{
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Name: row.src,
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Namespace: row.srcNamespace,
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Type: row.resourceType,
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},
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Dst: &pb.Resource{
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Name: row.dst,
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Namespace: row.dstNamespace,
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Type: row.resourceType,
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},
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ClientId: row.clientID,
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ServerId: row.serverID,
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NoIdentityMsg: row.msg,
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}
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edges = append(edges, edge)
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}
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// sorting to retain consistent order for tests
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edges = sortEdgeRows(edges)
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resp := pb.EdgesResponse{
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Response: &pb.EdgesResponse_Ok_{
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Ok: &pb.EdgesResponse_Ok{
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Edges: edges,
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},
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},
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}
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return resp
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}
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// GenTopRoutesResponse generates a mock Public API TopRoutesResponse object.
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func GenTopRoutesResponse(routes []string, counts []uint64, outbound bool, authority string) pb.TopRoutesResponse {
|
|
rows := []*pb.RouteTable_Row{}
|
|
for i, route := range routes {
|
|
row := &pb.RouteTable_Row{
|
|
Route: route,
|
|
Authority: authority,
|
|
Stats: &pb.BasicStats{
|
|
SuccessCount: counts[i],
|
|
FailureCount: 0,
|
|
LatencyMsP50: 123,
|
|
LatencyMsP95: 123,
|
|
LatencyMsP99: 123,
|
|
},
|
|
TimeWindow: "1m",
|
|
}
|
|
if outbound {
|
|
row.Stats.ActualSuccessCount = counts[i]
|
|
}
|
|
rows = append(rows, row)
|
|
}
|
|
defaultRow := &pb.RouteTable_Row{
|
|
Route: "[DEFAULT]",
|
|
Authority: authority,
|
|
Stats: &pb.BasicStats{
|
|
SuccessCount: counts[len(counts)-1],
|
|
FailureCount: 0,
|
|
LatencyMsP50: 123,
|
|
LatencyMsP95: 123,
|
|
LatencyMsP99: 123,
|
|
},
|
|
TimeWindow: "1m",
|
|
}
|
|
if outbound {
|
|
defaultRow.Stats.ActualSuccessCount = counts[len(counts)-1]
|
|
}
|
|
rows = append(rows, defaultRow)
|
|
|
|
resp := pb.TopRoutesResponse{
|
|
Response: &pb.TopRoutesResponse_Ok_{
|
|
Ok: &pb.TopRoutesResponse_Ok{
|
|
Routes: []*pb.RouteTable{
|
|
{
|
|
Rows: rows,
|
|
Resource: "deploy/foobar",
|
|
},
|
|
},
|
|
},
|
|
},
|
|
}
|
|
|
|
return resp
|
|
}
|
|
|
|
type expectedStatRPC struct {
|
|
err error
|
|
k8sConfigs []string // k8s objects to seed the API
|
|
mockPromResponse model.Value // mock out a prometheus query response
|
|
expectedPrometheusQueries []string // queries we expect public-api to issue to prometheus
|
|
}
|
|
|
|
func newMockGrpcServer(exp expectedStatRPC) (*MockProm, *grpcServer, error) {
|
|
k8sAPI, err := k8s.NewFakeAPI(exp.k8sConfigs...)
|
|
if err != nil {
|
|
return nil, nil, err
|
|
}
|
|
|
|
mockProm := &MockProm{Res: exp.mockPromResponse}
|
|
fakeGrpcServer := newGrpcServer(
|
|
mockProm,
|
|
nil,
|
|
k8sAPI,
|
|
"linkerd",
|
|
"cluster.local",
|
|
[]string{},
|
|
)
|
|
|
|
k8sAPI.Sync(nil)
|
|
|
|
return mockProm, fakeGrpcServer, nil
|
|
}
|
|
|
|
func (exp expectedStatRPC) verifyPromQueries(mockProm *MockProm) error {
|
|
// if exp.expectedPrometheusQueries is an empty slice we still wanna check no queries were executed.
|
|
if exp.expectedPrometheusQueries != nil {
|
|
sort.Strings(exp.expectedPrometheusQueries)
|
|
sort.Strings(mockProm.QueriesExecuted)
|
|
|
|
// because reflect.DeepEqual([]string{}, nil) is false
|
|
if len(exp.expectedPrometheusQueries) == 0 && len(mockProm.QueriesExecuted) == 0 {
|
|
return nil
|
|
}
|
|
|
|
if !reflect.DeepEqual(exp.expectedPrometheusQueries, mockProm.QueriesExecuted) {
|
|
return fmt.Errorf("Prometheus queries incorrect. \nExpected:\n%+v \nGot:\n%+v",
|
|
exp.expectedPrometheusQueries, mockProm.QueriesExecuted)
|
|
}
|
|
}
|
|
return nil
|
|
}
|