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504 lines
16 KiB
Go
504 lines
16 KiB
Go
// Copyright 2018 Google Inc. All Rights Reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//
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// Package proftest contains test helpers for profiler agent integration tests.
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// This package is experimental.
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// golang.org/x/build/kubernetes/dialer.go imports "context" package (rather
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// than "golang.org/x/net/context") and that does not exist in Go 1.6 or
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// earlier.
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// +build go1.7
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package proftest
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import (
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"archive/zip"
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"bytes"
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"encoding/json"
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"fmt"
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"io/ioutil"
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"log"
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"net/http"
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"strings"
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"time"
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"cloud.google.com/go/storage"
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"golang.org/x/build/kubernetes"
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k8sapi "golang.org/x/build/kubernetes/api"
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"golang.org/x/build/kubernetes/gke"
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"golang.org/x/net/context"
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cloudbuild "google.golang.org/api/cloudbuild/v1"
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compute "google.golang.org/api/compute/v1"
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container "google.golang.org/api/container/v1"
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"google.golang.org/api/googleapi"
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)
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const (
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monitorWriteScope = "https://www.googleapis.com/auth/monitoring.write"
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storageReadScope = "https://www.googleapis.com/auth/devstorage.read_only"
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)
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// TestRunner has common elements used for testing profiling agents on a range
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// of environments.
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type TestRunner struct {
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Client *http.Client
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}
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// GCETestRunner supports testing a profiling agent on GCE.
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type GCETestRunner struct {
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TestRunner
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ComputeService *compute.Service
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}
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// GKETestRunner supports testing a profiling agent on GKE.
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type GKETestRunner struct {
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TestRunner
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ContainerService *container.Service
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StorageClient *storage.Client
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Dockerfile string
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}
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// ProfileResponse contains the response produced when querying profile server.
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type ProfileResponse struct {
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Profile ProfileData `json:"profile"`
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NumProfiles int32 `json:"numProfiles"`
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Deployments []interface{} `json:"deployments"`
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}
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// ProfileData has data of a single profile.
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type ProfileData struct {
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Samples []int32 `json:"samples"`
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SampleMetrics interface{} `json:"sampleMetrics"`
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DefaultMetricType string `json:"defaultMetricType"`
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TreeNodes interface{} `json:"treeNodes"`
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Functions functionArray `json:"functions"`
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SourceFiles interface{} `json:"sourceFiles"`
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}
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type functionArray struct {
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Name []string `json:"name"`
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Sourcefile []int32 `json:"sourceFile"`
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}
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// InstanceConfig is configuration for starting single GCE instance for
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// profiling agent test case.
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type InstanceConfig struct {
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ProjectID string
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Zone string
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Name string
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StartupScript string
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MachineType string
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}
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// ClusterConfig is configuration for starting single GKE cluster for profiling
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// agent test case.
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type ClusterConfig struct {
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ProjectID string
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Zone string
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ClusterName string
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PodName string
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ImageSourceName string
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ImageName string
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Bucket string
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Dockerfile string
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}
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// HasFunction returns nil if the function is present, or, if the function is
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// not present, and error providing more details why the function is not
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// present.
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func (pr *ProfileResponse) HasFunction(functionName string) error {
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if pr.NumProfiles == 0 {
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return fmt.Errorf("failed to find function name %s in profile: profile response contains zero profiles: %v", functionName, pr)
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}
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if len(pr.Deployments) == 0 {
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return fmt.Errorf("failed to find function name %s in profile: profile response contains zero deployments: %v", functionName, pr)
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}
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if len(pr.Profile.Functions.Name) == 0 {
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return fmt.Errorf("failed to find function name %s in profile: profile does not have function data", functionName)
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}
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for _, name := range pr.Profile.Functions.Name {
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if strings.Contains(name, functionName) {
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return nil
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}
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}
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return fmt.Errorf("failed to find function name %s in profile", functionName)
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}
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// StartInstance starts a GCE Instance with name, zone, and projectId specified
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// by the inst, and which runs the startup script specified in inst.
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func (tr *GCETestRunner) StartInstance(ctx context.Context, inst *InstanceConfig) error {
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img, err := tr.ComputeService.Images.GetFromFamily("debian-cloud", "debian-9").Context(ctx).Do()
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if err != nil {
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return err
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}
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_, err = tr.ComputeService.Instances.Insert(inst.ProjectID, inst.Zone, &compute.Instance{
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MachineType: fmt.Sprintf("zones/%s/machineTypes/%s", inst.Zone, inst.MachineType),
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Name: inst.Name,
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Disks: []*compute.AttachedDisk{{
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AutoDelete: true, // delete the disk when the VM is deleted.
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Boot: true,
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Type: "PERSISTENT",
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Mode: "READ_WRITE",
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InitializeParams: &compute.AttachedDiskInitializeParams{
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SourceImage: img.SelfLink,
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DiskType: fmt.Sprintf("https://www.googleapis.com/compute/v1/projects/%s/zones/%s/diskTypes/pd-standard", inst.ProjectID, inst.Zone),
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},
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}},
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NetworkInterfaces: []*compute.NetworkInterface{{
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Network: fmt.Sprintf("https://www.googleapis.com/compute/v1/projects/%s/global/networks/default", inst.ProjectID),
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AccessConfigs: []*compute.AccessConfig{{
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Name: "External NAT",
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}},
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}},
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Metadata: &compute.Metadata{
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Items: []*compute.MetadataItems{{
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Key: "startup-script",
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Value: googleapi.String(inst.StartupScript),
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}},
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},
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ServiceAccounts: []*compute.ServiceAccount{{
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Email: "default",
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Scopes: []string{
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monitorWriteScope,
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},
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}},
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}).Do()
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return err
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}
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// DeleteInstance deletes an instance with project id, name, and zone matched
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// by inst.
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func (tr *GCETestRunner) DeleteInstance(ctx context.Context, inst *InstanceConfig) error {
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if _, err := tr.ComputeService.Instances.Delete(inst.ProjectID, inst.Zone, inst.Name).Context(ctx).Do(); err != nil {
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return fmt.Errorf("Instances.Delete(%s) got error: %v", inst.Name, err)
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}
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return nil
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}
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// PollForSerialOutput polls the serial output of the GCE instance specified by
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// inst and returns when the finishString appears in the serial output
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// of the instance, or when the context times out.
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func (tr *GCETestRunner) PollForSerialOutput(ctx context.Context, inst *InstanceConfig, finishString string) error {
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var output string
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defer func() {
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log.Printf("Serial port output for %s:\n%s", inst.Name, output)
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}()
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for {
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select {
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case <-ctx.Done():
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return fmt.Errorf("timed out waiting for profiling finishing on instance %s", inst.Name)
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case <-time.After(20 * time.Second):
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resp, err := tr.ComputeService.Instances.GetSerialPortOutput(inst.ProjectID, inst.Zone, inst.Name).Context(ctx).Do()
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if err != nil {
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// Transient failure.
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log.Printf("Transient error getting serial port output from instance %s (will retry): %v", inst.Name, err)
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continue
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}
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if output = resp.Contents; strings.Contains(output, finishString) {
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return nil
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}
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}
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}
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}
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// QueryProfiles retrieves profiles of a specific type, from a specific time
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// range, associated with a particular service and project.
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func (tr *TestRunner) QueryProfiles(projectID, service, startTime, endTime, profileType string) (ProfileResponse, error) {
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queryURL := fmt.Sprintf("https://cloudprofiler.googleapis.com/v2/projects/%s/profiles:query", projectID)
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const queryJSONFmt = `{"endTime": "%s", "profileType": "%s","startTime": "%s", "target": "%s"}`
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queryRequest := fmt.Sprintf(queryJSONFmt, endTime, profileType, startTime, service)
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resp, err := tr.Client.Post(queryURL, "application/json", strings.NewReader(queryRequest))
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if err != nil {
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return ProfileResponse{}, fmt.Errorf("failed to query API: %v", err)
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}
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defer resp.Body.Close()
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body, err := ioutil.ReadAll(resp.Body)
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if err != nil {
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return ProfileResponse{}, fmt.Errorf("failed to read response body: %v", err)
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}
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var pr ProfileResponse
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if err := json.Unmarshal(body, &pr); err != nil {
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return ProfileResponse{}, err
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}
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return pr, nil
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}
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// createAndPublishDockerImage creates a docker image from source code in a GCS
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// bucket and pushes the image to Google Container Registry.
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func (tr *GKETestRunner) createAndPublishDockerImage(ctx context.Context, projectID, sourceBucket, sourceObject, ImageName string) error {
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cloudbuildService, err := cloudbuild.New(tr.Client)
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build := &cloudbuild.Build{
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Source: &cloudbuild.Source{
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StorageSource: &cloudbuild.StorageSource{
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Bucket: sourceBucket,
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Object: sourceObject,
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},
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},
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Steps: []*cloudbuild.BuildStep{
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{
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Name: "gcr.io/cloud-builders/docker",
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Args: []string{"build", "-t", ImageName, "."},
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},
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},
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Images: []string{ImageName},
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}
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op, err := cloudbuildService.Projects.Builds.Create(projectID, build).Context(ctx).Do()
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if err != nil {
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return fmt.Errorf("failed to create image: %v", err)
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}
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opID := op.Name
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// Wait for creating image.
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for {
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select {
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case <-ctx.Done():
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return fmt.Errorf("timed out waiting creating image")
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case <-time.After(10 * time.Second):
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op, err := cloudbuildService.Operations.Get(opID).Context(ctx).Do()
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if err != nil {
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log.Printf("Transient error getting operation (will retry): %v", err)
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break
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}
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if op.Done == true {
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log.Printf("Published image %s to Google Container Registry.", ImageName)
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return nil
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}
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}
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}
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}
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type imageResponse struct {
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Manifest map[string]interface{} `json:"manifest"`
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Name string `json:"name"`
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Tags []string `json:"tags"`
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}
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// deleteDockerImage deletes a docker image from Google Container Registry.
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func (tr *GKETestRunner) deleteDockerImage(ctx context.Context, ImageName string) []error {
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queryImageURL := fmt.Sprintf("https://gcr.io/v2/%s/tags/list", ImageName)
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resp, err := tr.Client.Get(queryImageURL)
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if err != nil {
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return []error{fmt.Errorf("failed to list tags: %v", err)}
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}
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defer resp.Body.Close()
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body, err := ioutil.ReadAll(resp.Body)
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if err != nil {
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return []error{err}
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}
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var ir imageResponse
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if err := json.Unmarshal(body, &ir); err != nil {
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return []error{err}
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}
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const deleteImageURLFmt = "https://gcr.io/v2/%s/manifests/%s"
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var errs []error
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for _, tag := range ir.Tags {
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if err := deleteDockerImageResource(tr.Client, fmt.Sprintf(deleteImageURLFmt, ImageName, tag)); err != nil {
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errs = append(errs, fmt.Errorf("failed to delete tag %s: %v", tag, err))
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}
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}
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for manifest := range ir.Manifest {
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if err := deleteDockerImageResource(tr.Client, fmt.Sprintf(deleteImageURLFmt, ImageName, manifest)); err != nil {
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errs = append(errs, fmt.Errorf("failed to delete manifest %s: %v", manifest, err))
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}
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}
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return errs
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}
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func deleteDockerImageResource(client *http.Client, url string) error {
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req, err := http.NewRequest("DELETE", url, nil)
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if err != nil {
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return fmt.Errorf("failed to get request: %v", err)
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}
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resp, err := client.Do(req)
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if err != nil {
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return fmt.Errorf("failed to delete resource: %v", err)
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}
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defer resp.Body.Close()
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if resp.StatusCode != http.StatusOK && resp.StatusCode != http.StatusAccepted {
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return fmt.Errorf("failed to delete resource: status code = %d", resp.StatusCode)
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}
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return nil
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}
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func (tr *GKETestRunner) createCluster(ctx context.Context, client *http.Client, projectID, zone, ClusterName string) error {
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request := &container.CreateClusterRequest{Cluster: &container.Cluster{
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Name: ClusterName,
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InitialNodeCount: 3,
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NodeConfig: &container.NodeConfig{
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OauthScopes: []string{
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storageReadScope,
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},
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},
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}}
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op, err := tr.ContainerService.Projects.Zones.Clusters.Create(projectID, zone, request).Context(ctx).Do()
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if err != nil {
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return fmt.Errorf("failed to create cluster %s: %v", ClusterName, err)
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}
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opID := op.Name
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// Wait for creating cluster.
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for {
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select {
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case <-ctx.Done():
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return fmt.Errorf("timed out waiting creating cluster")
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case <-time.After(10 * time.Second):
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op, err := tr.ContainerService.Projects.Zones.Operations.Get(projectID, zone, opID).Context(ctx).Do()
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if err != nil {
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log.Printf("Transient error getting operation (will retry): %v", err)
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break
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}
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if op.Status == "DONE" {
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log.Printf("Created cluster %s.", ClusterName)
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return nil
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}
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if op.Status == "ABORTING" {
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return fmt.Errorf("create cluster operation is aborted")
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}
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}
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}
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}
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func (tr *GKETestRunner) deployContainer(ctx context.Context, kubernetesClient *kubernetes.Client, podName, ImageName string) error {
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pod := &k8sapi.Pod{
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ObjectMeta: k8sapi.ObjectMeta{
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Name: podName,
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},
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Spec: k8sapi.PodSpec{
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Containers: []k8sapi.Container{
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{
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Name: "profiler-test",
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Image: fmt.Sprintf("gcr.io/%s:latest", ImageName),
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},
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},
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},
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}
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if _, err := kubernetesClient.RunLongLivedPod(ctx, pod); err != nil {
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return fmt.Errorf("failed to run pod %s: %v", podName, err)
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}
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return nil
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}
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// PollPodLog polls the log of the kubernetes client and returns when the
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// finishString appears in the log, or when the context times out.
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func (tr *GKETestRunner) PollPodLog(ctx context.Context, kubernetesClient *kubernetes.Client, podName, finishString string) error {
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var output string
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defer func() {
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log.Printf("Log for pod %s:\n%s", podName, output)
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}()
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for {
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select {
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case <-ctx.Done():
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return fmt.Errorf("timed out waiting profiling finishing on container")
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case <-time.After(20 * time.Second):
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var err error
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output, err = kubernetesClient.PodLog(ctx, podName)
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if err != nil {
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// Transient failure.
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log.Printf("Transient error getting log (will retry): %v", err)
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continue
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}
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if strings.Contains(output, finishString) {
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return nil
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}
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}
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}
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}
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// DeleteClusterAndImage deletes cluster and images used to create cluster.
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func (tr *GKETestRunner) DeleteClusterAndImage(ctx context.Context, cfg *ClusterConfig) []error {
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var errs []error
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if err := tr.StorageClient.Bucket(cfg.Bucket).Object(cfg.ImageSourceName).Delete(ctx); err != nil {
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errs = append(errs, fmt.Errorf("failed to delete storage client: %v", err))
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}
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for _, err := range tr.deleteDockerImage(ctx, cfg.ImageName) {
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errs = append(errs, fmt.Errorf("failed to delete docker image: %v", err))
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}
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if _, err := tr.ContainerService.Projects.Zones.Clusters.Delete(cfg.ProjectID, cfg.Zone, cfg.ClusterName).Context(ctx).Do(); err != nil {
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errs = append(errs, fmt.Errorf("failed to delete cluster %s: %v", cfg.ClusterName, err))
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}
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return errs
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}
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// StartAndDeployCluster creates image needed for cluster, then starts and
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// deploys to cluster.
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func (tr *GKETestRunner) StartAndDeployCluster(ctx context.Context, cfg *ClusterConfig) error {
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if err := tr.uploadImageSource(ctx, cfg.Bucket, cfg.ImageSourceName, cfg.Dockerfile); err != nil {
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return fmt.Errorf("failed to upload image source: %v", err)
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}
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createImageCtx, cancel := context.WithTimeout(ctx, 5*time.Minute)
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defer cancel()
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if err := tr.createAndPublishDockerImage(createImageCtx, cfg.ProjectID, cfg.Bucket, cfg.ImageSourceName, fmt.Sprintf("gcr.io/%s", cfg.ImageName)); err != nil {
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return fmt.Errorf("failed to create and publish docker image %s: %v", cfg.ImageName, err)
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}
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kubernetesClient, err := gke.NewClient(ctx, cfg.ClusterName, gke.OptZone(cfg.Zone), gke.OptProject(cfg.ProjectID))
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if err != nil {
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return fmt.Errorf("failed to create new GKE client: %v", err)
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}
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deployContainerCtx, cancel := context.WithTimeout(ctx, 5*time.Minute)
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defer cancel()
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if err := tr.deployContainer(deployContainerCtx, kubernetesClient, cfg.PodName, cfg.ImageName); err != nil {
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return fmt.Errorf("failed to deploy image %q to pod %q: %v", cfg.PodName, cfg.ImageName, err)
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}
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return nil
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}
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// uploadImageSource uploads source code for building docker image to GCS.
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func (tr *GKETestRunner) uploadImageSource(ctx context.Context, bucket, objectName, dockerfile string) error {
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zipBuf := new(bytes.Buffer)
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z := zip.NewWriter(zipBuf)
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f, err := z.Create("Dockerfile")
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if err != nil {
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return err
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}
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if _, err := f.Write([]byte(dockerfile)); err != nil {
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return err
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}
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if err := z.Close(); err != nil {
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return err
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}
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wc := tr.StorageClient.Bucket(bucket).Object(objectName).NewWriter(ctx)
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wc.ContentType = "application/zip"
|
|
wc.ACL = []storage.ACLRule{{storage.AllUsers, storage.RoleReader}}
|
|
if _, err := wc.Write(zipBuf.Bytes()); err != nil {
|
|
return err
|
|
}
|
|
return wc.Close()
|
|
}
|