Add basic nomad integration and runner provider

.gitignore

@@ -1,5 +1,8 @@
 # Project binary
 poseidon
+
 # TLS certificate/key
 *.crt
 *.key
+
+configuration.yaml

.gitlab-ci.yml

@@ -48,7 +48,7 @@ test:
   stage: test
   needs: []
   script:
-    - go test ./... -v -coverprofile coverage.cov
+    - go test $(go list ./... | grep -v /e2e) -v -coverprofile coverage.cov
     - go tool cover -func=coverage.cov
     - go tool cover -html=coverage.cov -o coverage.html
   artifacts:

README.md

@@ -69,3 +69,11 @@ You can create a self-signed certificate to use with this API using the followin
 ```shell
 $ openssl req -x509 -nodes -newkey rsa:2048 -keyout server.rsa.key -out server.rsa.crt -days 3650
 ```
+
+## Tests
+
+As testing framework we use the [testify](https://github.com/stretchr/testify) toolkit.  
+For mocks we use [mockery](https://github.com/vektra/mockery).
+With Mockery, you can create mocks by running `mockery -r --name=<<interface_name>>` on a specific interface.
+If the interface changes, you can rerun this command.  
+For e2e tests we provide a separate package. E2e tests require the connection to a Nomad cluster.

api/api.go

@@ -3,12 +3,19 @@ package api
 import (
 	"encoding/json"
 	"github.com/gorilla/mux"
+	"gitlab.hpi.de/codeocean/codemoon/poseidon/api/dto"
 	"gitlab.hpi.de/codeocean/codemoon/poseidon/logging"
 	"net/http"
 )
 
 var log = logging.GetLogger("api")
 
+const (
+	RouteBase    = "/api/v1"
+	RouteHealth  = "/health"
+	RouteRunners = "/runners"
+)
+
 // NewRouter returns an HTTP handler (http.Handler) which can be
 // used by the net/http package to serve the routes of our API. It
 // always returns a router for the newest version of our API. We
@@ -23,20 +30,34 @@ func NewRouter() http.Handler {
 	return router
 }
 
-// newRouterV1 returns a subrouter containing the routes of version
+// newRouterV1 returns a sub-router containing the routes of version
 // 1 of our API.
 func newRouterV1(router *mux.Router) *mux.Router {
-	v1 := router.PathPrefix("/api/v1").Subrouter()
+	v1 := router.PathPrefix(RouteBase).Subrouter()
-	v1.HandleFunc("/health", Health).Methods(http.MethodGet)
+	v1.HandleFunc(RouteHealth, Health).Methods(http.MethodGet)
+	registerRunnerRoutes(v1.PathPrefix(RouteRunners).Subrouter())
 	return v1
 }
 
-func writeJson(writer http.ResponseWriter, content interface{}) {
+func writeInternalServerError(writer http.ResponseWriter, err error, errorCode dto.ErrorCode) {
+	sendJson(writer, &dto.InternalServerError{Message: err.Error(), ErrorCode: errorCode}, http.StatusInternalServerError)
+}
+
+func writeBadRequest(writer http.ResponseWriter, err error) {
+	sendJson(writer, &dto.ClientError{Message: err.Error()}, http.StatusBadRequest)
+}
+
+func writeNotFound(writer http.ResponseWriter, err error) {
+	sendJson(writer, &dto.ClientError{Message: err.Error()}, http.StatusNotFound)
+}
+
+func sendJson(writer http.ResponseWriter, content interface{}, httpStatusCode int) {
 	writer.Header().Set("Content-Type", "application/json")
+	writer.WriteHeader(httpStatusCode)
 	response, err := json.Marshal(content)
 	if err != nil {
-		log.WithError(err).Warn("JSON marshal error")
+		// cannot produce infinite recursive loop, since json.Marshal of dto.InternalServerError won't return an error
-		http.Error(writer, err.Error(), http.StatusInternalServerError)
+		writeInternalServerError(writer, err, dto.ErrorUnknown)
 		return
 	}
 	if _, err := writer.Write(response); err != nil {

api/dto/dto.go

@@ -0,0 +1,33 @@
+package dto
+
+// RequestRunner is the expected json structure of the request body for the ProvideRunner function
+type RequestRunner struct {
+	ExecutionEnvironmentId int `json:"executionEnvironmentId"`
+	InactivityTimeout      int `json:"inactivityTimeout"`
+}
+
+// ResponseRunner is the expected result from the api server
+type ResponseRunner struct {
+	Id string `json:"runnerId"`
+}
+
+// ClientError is the response interface if the request is not valid
+type ClientError struct {
+	Message string `json:"message"`
+}
+
+// InternalServerError is the response interface that is returned when an error occurs
+type InternalServerError struct {
+	Message   string    `json:"message"`
+	ErrorCode ErrorCode `json:"errorCode"`
+}
+
+// ErrorCode is the type for error codes expected by CodeOcean
+type ErrorCode string
+
+const (
+	ErrorNomadUnreachable         ErrorCode = "NOMAD_UNREACHABLE"
+	ErrorNomadOverload            ErrorCode = "NOMAD_OVERLOAD"
+	ErrorNomadInternalServerError ErrorCode = "NOMAD_INTERNAL_SERVER_ERROR"
+	ErrorUnknown                  ErrorCode = "UNKNOWN"
+)

api/health.go

@@ -7,8 +7,5 @@ import (
 // Health tries to respond that the server is alive.
 // If it is not, the response won't reach the client.
 func Health(writer http.ResponseWriter, _ *http.Request) {
-	writeJson(
+	writer.WriteHeader(http.StatusNoContent)
-		writer,
-		Message{"I'm alive!"},
-	)
 }

api/health_test.go

@@ -1,7 +1,6 @@
 package api
 
 import (
-	"encoding/json"
 	"github.com/stretchr/testify/assert"
 	"net/http"
 	"net/http/httptest"
@@ -15,10 +14,5 @@ func TestHealthRoute(t *testing.T) {
 	}
 	recorder := httptest.NewRecorder()
 	http.HandlerFunc(Health).ServeHTTP(recorder, request)
-	result := Message{}
+	assert.Equal(t, http.StatusNoContent, recorder.Code)
-	_ = json.Unmarshal(recorder.Body.Bytes(), &result)
-
-	assert.Equal(t, http.StatusOK, recorder.Code)
-	assert.Equal(t, "application/json", recorder.Header().Get("Content-Type"))
-	assert.Equal(t, "I'm alive!", result.Message)
 }

api/response_messages.go

@@ -1,5 +0,0 @@
-package api
-
-type Message struct {
-	Message string `json:"msg"`
-}

api/runners.go

@@ -0,0 +1,35 @@
+package api
+
+import (
+	"encoding/json"
+	"github.com/gorilla/mux"
+	"gitlab.hpi.de/codeocean/codemoon/poseidon/api/dto"
+	"gitlab.hpi.de/codeocean/codemoon/poseidon/environment"
+	"net/http"
+)
+
+// ProvideRunner tries to respond with the id of a runner.
+// This runner is then reserved for future use.
+func ProvideRunner(writer http.ResponseWriter, request *http.Request) {
+	runnerRequest := new(dto.RequestRunner)
+	if err := json.NewDecoder(request.Body).Decode(runnerRequest); err != nil {
+		writeBadRequest(writer, err)
+		return
+	}
+	environment, err := environment.GetExecutionEnvironment(runnerRequest.ExecutionEnvironmentId)
+	if err != nil {
+		writeNotFound(writer, err)
+		return
+	}
+	runner, err := environment.NextRunner()
+	if err != nil {
+		writeInternalServerError(writer, err, dto.ErrorNomadOverload)
+		return
+	}
+
+	sendJson(writer, &dto.ResponseRunner{Id: runner.Id()}, http.StatusOK)
+}
+
+func registerRunnerRoutes(router *mux.Router) {
+	router.HandleFunc("", ProvideRunner).Methods(http.MethodPost)
+}

config/config.go

@@ -6,6 +6,7 @@ import (
 	"fmt"
 	"gitlab.hpi.de/codeocean/codemoon/poseidon/logging"
 	"gopkg.in/yaml.v3"
+	"net/url"
 	"os"
 	"reflect"
 	"strconv"
@@ -24,6 +25,7 @@ var (
 		Nomad: nomad{
 			Address: "",
 			Token:   "",
+			Port:    4646,
 			TLS:     false,
 		},
 		Logger: logger{
@@ -49,6 +51,7 @@ type server struct {
 type nomad struct {
 	Address string
 	Token   string
+	Port    int
 	TLS     bool
 }
 
@@ -68,9 +71,29 @@ func InitConfig() {
 	Config.mergeEnvironmentVariables()
 }
 
+func (c *configuration) NomadAPIURL() *url.URL {
+	return parseURL(Config.Nomad.Address, Config.Nomad.Port, Config.Nomad.TLS)
+}
+
+func (c *configuration) PoseidonAPIURL() *url.URL {
+	return parseURL(Config.Server.Address, Config.Server.Port, false)
+}
+
+func parseURL(address string, port int, tls bool) *url.URL {
+	scheme := "http"
+	if tls {
+		scheme = "https"
+	}
+	return &url.URL{
+		Scheme: scheme,
+		Host:   fmt.Sprintf("%s:%d", address, port),
+	}
+}
+
 func readConfigFile() []byte {
 	var configFilePath string
 	flag.StringVar(&configFilePath, "config", "./configuration.yaml", "path of the yaml config file")
+	flag.Parse()
 	data, err := os.ReadFile(configFilePath)
 	if err != nil {
 		log.WithError(err).Info("Using default configuration...")

e2e/e2e_tests.go

@@ -0,0 +1,21 @@
+package e2e
+
+import (
+	"fmt"
+	"gitlab.hpi.de/codeocean/codemoon/poseidon/api"
+	"gitlab.hpi.de/codeocean/codemoon/poseidon/config"
+	"strings"
+)
+
+/*
+* # E2E Tests
+*
+* For the e2e tests a nomad cluster must be connected and poseidon must be running.
+ */
+
+var baseURL = fmt.Sprintf("http://%s:%d", config.Config.Server.Address, config.Config.Server.Port)
+
+func buildURL(parts ...string) (url string) {
+	parts = append([]string{baseURL, api.RouteBase}, parts...)
+	return strings.Join(parts, "")
+}

e2e/health_test.go

@@ -0,0 +1,14 @@
+package e2e
+
+import (
+	"github.com/stretchr/testify/assert"
+	"gitlab.hpi.de/codeocean/codemoon/poseidon/api"
+	"net/http"
+	"testing"
+)
+
+func TestHealthRoute(t *testing.T) {
+	resp, err := http.Get(buildURL(api.RouteHealth))
+	assert.NoError(t, err)
+	assert.Equal(t, http.StatusNoContent, resp.StatusCode, "The response code should be NoContent")
+}

e2e/runners_test.go

@@ -0,0 +1,24 @@
+package e2e
+
+import (
+	"encoding/json"
+	"github.com/stretchr/testify/assert"
+	"gitlab.hpi.de/codeocean/codemoon/poseidon/api"
+	"gitlab.hpi.de/codeocean/codemoon/poseidon/api/dto"
+	"net/http"
+	"strings"
+	"testing"
+)
+
+func TestProvideRunnerRoute(t *testing.T) {
+	reader := strings.NewReader(`{"executionEnvironmentId":0}`)
+	resp, err := http.Post(buildURL(api.RouteRunners), "application/json", reader)
+	assert.NoError(t, err)
+	assert.Equal(t, http.StatusOK, resp.StatusCode, "The response code should be ok")
+
+	runnerResponse := new(dto.ResponseRunner)
+	err = json.NewDecoder(resp.Body).Decode(runnerResponse)
+	assert.NoError(t, err)
+
+	assert.True(t, runnerResponse.Id != "", "The response contains a runner id")
+}

environment/execution_environment.go

@@ -0,0 +1,107 @@
+package environment
+
+import (
+	"errors"
+	"gitlab.hpi.de/codeocean/codemoon/poseidon/environment/pool"
+	"gitlab.hpi.de/codeocean/codemoon/poseidon/logging"
+	"gitlab.hpi.de/codeocean/codemoon/poseidon/nomad"
+	"gitlab.hpi.de/codeocean/codemoon/poseidon/runner"
+	"time"
+)
+
+var log = logging.GetLogger("execution_environment")
+
+// ExecutionEnvironment is a partial image of an execution environment in CodeOcean.
+type ExecutionEnvironment interface {
+	// NextRunner gets the next available runner and marks it as running.
+	// If no runner is available it throws a error after a small timeout
+	NextRunner() (runner.Runner, error)
+	// Refresh fetches the runners for this execution environment and sends them to the pool.
+	// This function does not terminate. Instead it fetches new runners periodically.
+	Refresh()
+}
+
+// NomadExecutionEnvironment is an implementation that returns a nomad specific execution environment.
+// Here it is mapped on a Job in Nomad.
+// The jobId has to match the only Nomad task group name!
+type NomadExecutionEnvironment struct {
+	id               int
+	jobId            string
+	availableRunners chan runner.Runner
+	allRunners       pool.RunnerPool
+	nomadApiClient   nomad.ExecutorApi
+}
+
+var executionEnvironment ExecutionEnvironment
+
+// DebugInit initializes one execution environment so that its runners can be provided.
+// ToDo: This should be replaced by a create Execution Environment route
+func DebugInit(runnersPool pool.RunnerPool, nomadApi nomad.ExecutorApi) {
+	executionEnvironment = &NomadExecutionEnvironment{
+		id:               0,
+		jobId:            "python",
+		availableRunners: make(chan runner.Runner, 50),
+		nomadApiClient:   nomadApi,
+		allRunners:       runnersPool,
+	}
+	go executionEnvironment.Refresh()
+}
+
+// GetExecutionEnvironment returns a previously added ExecutionEnvironment.
+// This way you can access all Runners for that environment,
+func GetExecutionEnvironment(id int) (ExecutionEnvironment, error) {
+	// TODO: Remove hardcoded execution environment
+	return executionEnvironment, nil
+}
+
+func (environment *NomadExecutionEnvironment) NextRunner() (r runner.Runner, err error) {
+	select {
+	case r = <-environment.availableRunners:
+		r.SetStatus(runner.StatusRunning)
+		return r, nil
+	case <-time.After(50 * time.Millisecond):
+		return nil, errors.New("no runners available")
+	}
+}
+
+// Refresh Big ToDo: Improve this function!! State out that it also rescales the job; Provide context to be terminable...
+func (environment *NomadExecutionEnvironment) Refresh() {
+	for {
+		runners, err := environment.nomadApiClient.LoadRunners(environment.jobId)
+		if err != nil {
+			log.WithError(err).Printf("Failed fetching runners")
+			break
+		}
+		for _, r := range environment.unusedRunners(runners) {
+			// ToDo: Listen on Nomad event stream
+			log.Printf("Adding allocation %+v", r)
+			environment.allRunners.AddRunner(r)
+			environment.availableRunners <- r
+		}
+		jobScale, err := environment.nomadApiClient.GetJobScale(environment.jobId)
+		if err != nil {
+			log.WithError(err).Printf("Failed get allocation count")
+			break
+		}
+		neededRunners := cap(environment.availableRunners) - len(environment.availableRunners) + 1
+		runnerCount := jobScale + neededRunners
+		time.Sleep(50 * time.Millisecond)
+		log.Printf("Set job scaling %d", runnerCount)
+		err = environment.nomadApiClient.SetJobScaling(environment.jobId, runnerCount, "Runner Requested")
+		if err != nil {
+			log.WithError(err).Printf("Failed set allocation scaling")
+			continue
+		}
+	}
+}
+
+func (environment *NomadExecutionEnvironment) unusedRunners(fetchedRunnerIds []string) (newRunners []runner.Runner) {
+	newRunners = make([]runner.Runner, 0)
+	for _, runnerId := range fetchedRunnerIds {
+		_, ok := environment.allRunners.GetRunner(runnerId)
+		if !ok {
+			newRunners = append(newRunners, runner.NewExerciseRunner(runnerId))
+		}
+	}
+	return
+}

environment/execution_environment_test.go

@@ -0,0 +1,111 @@
+package environment
+
+import (
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/mock"
+	"github.com/stretchr/testify/suite"
+	"gitlab.hpi.de/codeocean/codemoon/poseidon/environment/pool"
+	"gitlab.hpi.de/codeocean/codemoon/poseidon/mocks"
+	"gitlab.hpi.de/codeocean/codemoon/poseidon/runner"
+	"testing"
+	"time"
+)
+
+const runnerId = "s0m3-r4nd0m-1d"
+const anotherRunnerId = "4n0th3r-1d"
+const jobId = "4n0th3r-1d"
+
+func TestGetNextRunnerTestSuite(t *testing.T) {
+	suite.Run(t, new(GetNextRunnerTestSuite))
+}
+
+type GetNextRunnerTestSuite struct {
+	suite.Suite
+	nomadExecutionEnvironment *NomadExecutionEnvironment
+	exerciseRunner            runner.Runner
+}
+
+func (suite *GetNextRunnerTestSuite) SetupTest() {
+	suite.nomadExecutionEnvironment = &NomadExecutionEnvironment{
+		availableRunners: make(chan runner.Runner, 50),
+		allRunners:       pool.NewLocalRunnerPool(),
+	}
+	suite.exerciseRunner = runner.NewExerciseRunner(runnerId)
+}
+
+func (suite *GetNextRunnerTestSuite) TestGetNextRunnerReturnsRunnerIfAvailable() {
+	suite.nomadExecutionEnvironment.availableRunners <- suite.exerciseRunner
+
+	receivedRunner, err := suite.nomadExecutionEnvironment.NextRunner()
+	suite.NoError(err)
+	suite.Equal(suite.exerciseRunner, receivedRunner)
+}
+
+func (suite *GetNextRunnerTestSuite) TestGetNextRunnerChangesStatusOfRunner() {
+	suite.nomadExecutionEnvironment.availableRunners <- suite.exerciseRunner
+
+	receivedRunner, _ := suite.nomadExecutionEnvironment.NextRunner()
+	suite.Equal(runner.StatusRunning, receivedRunner.Status())
+}
+
+func (suite *GetNextRunnerTestSuite) TestGetNextRunnerDoesNotReturnTheSameRunnerTwice() {
+	suite.nomadExecutionEnvironment.availableRunners <- suite.exerciseRunner
+	suite.nomadExecutionEnvironment.availableRunners <- runner.NewExerciseRunner(anotherRunnerId)
+
+	firstReceivedRunner, _ := suite.nomadExecutionEnvironment.NextRunner()
+	secondReceivedRunner, _ := suite.nomadExecutionEnvironment.NextRunner()
+	suite.NotEqual(firstReceivedRunner, secondReceivedRunner)
+}
+
+func (suite *GetNextRunnerTestSuite) TestGetNextRunnerThrowsAnErrorIfNoRunnersAvailable() {
+	receivedRunner, err := suite.nomadExecutionEnvironment.NextRunner()
+	suite.Nil(receivedRunner)
+	suite.Error(err)
+}
+
+func TestRefreshFetchRunners(t *testing.T) {
+	apiMock, environment := newRefreshMock([]string{runnerId}, pool.NewLocalRunnerPool())
+	// ToDo: Terminate Refresh when test finished (also in other tests)
+	go environment.Refresh()
+	_, _ = environment.NextRunner()
+	apiMock.AssertCalled(t, "LoadRunners", jobId)
+}
+
+func TestRefreshFetchesRunnersIntoChannel(t *testing.T) {
+	_, environment := newRefreshMock([]string{runnerId}, pool.NewLocalRunnerPool())
+	go environment.Refresh()
+	availableRunner, _ := environment.NextRunner()
+	assert.Equal(t, availableRunner.Id(), runnerId)
+}
+
+func TestRefreshScalesJob(t *testing.T) {
+	apiMock, environment := newRefreshMock([]string{runnerId}, pool.NewLocalRunnerPool())
+	go environment.Refresh()
+	_, _ = environment.NextRunner()
+	time.Sleep(100 * time.Millisecond) // ToDo: Be safe this test is not flaky
+	apiMock.AssertCalled(t, "SetJobScaling", jobId, 52, "Runner Requested")
+}
+
+func TestRefreshAddsRunnerToPool(t *testing.T) {
+	runnersInUse := pool.NewLocalRunnerPool()
+	_, environment := newRefreshMock([]string{runnerId}, runnersInUse)
+	go environment.Refresh()
+	availableRunner, _ := environment.NextRunner()
+	poolRunner, ok := runnersInUse.GetRunner(availableRunner.Id())
+	assert.True(t, ok, "The requested runner is added to the pool")
+	assert.Equal(t, availableRunner, poolRunner, "The requested runner equals the runner added to the pool")
+}
+
+func newRefreshMock(returnedRunnerIds []string, allRunners pool.RunnerPool) (apiClient *mocks.ExecutorApi, environment *NomadExecutionEnvironment) {
+	apiClient = &mocks.ExecutorApi{}
+	apiClient.On("LoadRunners", jobId).Return(returnedRunnerIds, nil)
+	apiClient.On("GetJobScale", jobId).Return(len(returnedRunnerIds), nil)
+	apiClient.On("SetJobScaling", jobId, mock.AnythingOfType("int"), "Runner Requested").Return(nil)
+	environment = &NomadExecutionEnvironment{
+		jobId:            jobId,
+		availableRunners: make(chan runner.Runner, 50),
+		allRunners:       allRunners,
+		nomadApiClient:   apiClient,
+	}
+	return
+}

environment/pool/pool.go

@@ -0,0 +1,51 @@
+package pool
+
+import (
+	"gitlab.hpi.de/codeocean/codemoon/poseidon/runner"
+	"sync"
+)
+
+// RunnerPool is the interface for storing runners
+// ToDo: Create interface implementation that use some persistent storage like a database
+type RunnerPool interface {
+	// AddRunner adds a provided runner to the pool storage
+	AddRunner(runner.Runner)
+	// GetRunner returns a runner from the pool storage
+	// If the requested runner is not stored 'ok' will be false
+	GetRunner(id string) (r runner.Runner, ok bool)
+	// DeleteRunner deletes the runner with the passed id from the pool storage
+	DeleteRunner(id string)
+}
+
+// localRunnerPool stores runner objects in the local application memory
+type localRunnerPool struct {
+	sync.RWMutex
+	runners map[string]runner.Runner
+}
+
+// NewLocalRunnerPool responds with a RunnerPool implementation
+// This implementation stores the data thread-safe in the local application memory
+func NewLocalRunnerPool() *localRunnerPool {
+	return &localRunnerPool{
+		runners: make(map[string]runner.Runner),
+	}
+}
+
+func (pool *localRunnerPool) AddRunner(r runner.Runner) {
+	pool.Lock()
+	defer pool.Unlock()
+	pool.runners[r.Id()] = r
+}
+
+func (pool *localRunnerPool) GetRunner(id string) (r runner.Runner, ok bool) {
+	pool.RLock()
+	defer pool.RUnlock()
+	r, ok = pool.runners[id]
+	return
+}
+
+func (pool *localRunnerPool) DeleteRunner(id string) {
+	pool.Lock()
+	defer pool.Unlock()
+	delete(pool.runners, id)
+}

environment/pool/pool_test.go

@@ -0,0 +1,24 @@
+package pool
+
+import (
+	"github.com/stretchr/testify/assert"
+	"gitlab.hpi.de/codeocean/codemoon/poseidon/runner"
+	"testing"
+)
+
+const runnerId = "s0m3-r4nd0m-1d"
+
+func TestAddedRunnerCanBeRetrieved(t *testing.T) {
+	runnerPool := NewLocalRunnerPool()
+	runnerPool.AddRunner(runner.NewExerciseRunner(runnerId))
+	_, ok := runnerPool.GetRunner(runnerId)
+	assert.True(t, ok, "A saved runner should be retrievable")
+}
+
+func TestDeletedRunnersAreNotAccessible(t *testing.T) {
+	pool := NewLocalRunnerPool()
+	pool.AddRunner(runner.NewExerciseRunner(runnerId))
+	pool.DeleteRunner(runnerId)
+	_, ok := pool.GetRunner(runnerId)
+	assert.False(t, ok, "A deleted runner should not be accessible")
+}

go.mod

@@ -4,8 +4,15 @@ go 1.16
 
 require (
 	github.com/gorilla/mux v1.8.0
+	github.com/gorilla/websocket v1.4.2 // indirect
+	github.com/hashicorp/cronexpr v1.1.1 // indirect
+	github.com/hashicorp/go-cleanhttp v0.5.2 // indirect
+	github.com/hashicorp/nomad/api v0.0.0-20210430020956-28b8767b278f
+	github.com/kr/text v0.2.0 // indirect
+	github.com/mitchellh/mapstructure v1.4.1 // indirect
 	github.com/sirupsen/logrus v1.8.1
 	github.com/stretchr/testify v1.7.0
+	github.com/vektra/mockery/v2 v2.7.4 // indirect
 	golang.org/x/sys v0.0.0-20210426230700-d19ff857e887 // indirect
 	gopkg.in/yaml.v3 v3.0.0-20210107192922-496545a6307b
 )

go.sum

@@ -1,21 +1,373 @@
+cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
+cloud.google.com/go v0.34.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
+cloud.google.com/go v0.38.0/go.mod h1:990N+gfupTy94rShfmMCWGDn0LpTmnzTp2qbd1dvSRU=
+cloud.google.com/go v0.44.1/go.mod h1:iSa0KzasP4Uvy3f1mN/7PiObzGgflwredwwASm/v6AU=
+cloud.google.com/go v0.44.2/go.mod h1:60680Gw3Yr4ikxnPRS/oxxkBccT6SA1yMk63TGekxKY=
+cloud.google.com/go v0.45.1/go.mod h1:RpBamKRgapWJb87xiFSdk4g1CME7QZg3uwTez+TSTjc=
+cloud.google.com/go v0.46.3/go.mod h1:a6bKKbmY7er1mI7TEI4lsAkts/mkhTSZK8w33B4RAg0=
+cloud.google.com/go/bigquery v1.0.1/go.mod h1:i/xbL2UlR5RvWAURpBYZTtm/cXjCha9lbfbpx4poX+o=
+cloud.google.com/go/datastore v1.0.0/go.mod h1:LXYbyblFSglQ5pkeyhO+Qmw7ukd3C+pD7TKLgZqpHYE=
+cloud.google.com/go/firestore v1.1.0/go.mod h1:ulACoGHTpvq5r8rxGJ4ddJZBZqakUQqClKRT5SZwBmk=
+cloud.google.com/go/pubsub v1.0.1/go.mod h1:R0Gpsv3s54REJCy4fxDixWD93lHJMoZTyQ2kNxGRt3I=
+cloud.google.com/go/storage v1.0.0/go.mod h1:IhtSnM/ZTZV8YYJWCY8RULGVqBDmpoyjwiyrjsg+URw=
+dmitri.shuralyov.com/gpu/mtl v0.0.0-20190408044501-666a987793e9/go.mod h1:H6x//7gZCb22OMCxBHrMx7a5I7Hp++hsVxbQ4BYO7hU=
+github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
+github.com/BurntSushi/xgb v0.0.0-20160522181843-27f122750802/go.mod h1:IVnqGOEym/WlBOVXweHU+Q+/VP0lqqI8lqeDx9IjBqo=
+github.com/OneOfOne/xxhash v1.2.2/go.mod h1:HSdplMjZKSmBqAxg5vPj2TmRDmfkzw+cTzAElWljhcU=
+github.com/alecthomas/template v0.0.0-20160405071501-a0175ee3bccc/go.mod h1:LOuyumcjzFXgccqObfd/Ljyb9UuFJ6TxHnclSeseNhc=
+github.com/alecthomas/units v0.0.0-20151022065526-2efee857e7cf/go.mod h1:ybxpYRFXyAe+OPACYpWeL0wqObRcbAqCMya13uyzqw0=
+github.com/armon/circbuf v0.0.0-20150827004946-bbbad097214e/go.mod h1:3U/XgcO3hCbHZ8TKRvWD2dDTCfh9M9ya+I9JpbB7O8o=
+github.com/armon/consul-api v0.0.0-20180202201655-eb2c6b5be1b6/go.mod h1:grANhF5doyWs3UAsr3K4I6qtAmlQcZDesFNEHPZAzj8=
+github.com/armon/go-metrics v0.0.0-20180917152333-f0300d1749da/go.mod h1:Q73ZrmVTwzkszR9V5SSuryQ31EELlFMUz1kKyl939pY=
+github.com/armon/go-radix v0.0.0-20180808171621-7fddfc383310/go.mod h1:ufUuZ+zHj4x4TnLV4JWEpy2hxWSpsRywHrMgIH9cCH8=
+github.com/beorn7/perks v0.0.0-20180321164747-3a771d992973/go.mod h1:Dwedo/Wpr24TaqPxmxbtue+5NUziq4I4S80YR8gNf3Q=
+github.com/beorn7/perks v1.0.0/go.mod h1:KWe93zE9D1o94FZ5RNwFwVgaQK1VOXiVxmqh+CedLV8=
+github.com/bgentry/speakeasy v0.1.0/go.mod h1:+zsyZBPWlz7T6j88CTgSN5bM796AkVf0kBD4zp0CCIs=
+github.com/bketelsen/crypt v0.0.3-0.20200106085610-5cbc8cc4026c/go.mod h1:MKsuJmJgSg28kpZDP6UIiPt0e0Oz0kqKNGyRaWEPv84=
+github.com/cespare/xxhash v1.1.0/go.mod h1:XrSqR1VqqWfGrhpAt58auRo0WTKS1nRRg3ghfAqPWnc=
+github.com/client9/misspell v0.3.4/go.mod h1:qj6jICC3Q7zFZvVWo7KLAzC3yx5G7kyvSDkc90ppPyw=
+github.com/coreos/bbolt v1.3.2/go.mod h1:iRUV2dpdMOn7Bo10OQBFzIJO9kkE559Wcmn+qkEiiKk=
+github.com/coreos/etcd v3.3.10+incompatible/go.mod h1:uF7uidLiAD3TWHmW31ZFd/JWoc32PjwdhPthX9715RE=
+github.com/coreos/etcd v3.3.13+incompatible/go.mod h1:uF7uidLiAD3TWHmW31ZFd/JWoc32PjwdhPthX9715RE=
+github.com/coreos/go-semver v0.2.0/go.mod h1:nnelYz7RCh+5ahJtPPxZlU+153eP4D4r3EedlOD2RNk=
+github.com/coreos/go-semver v0.3.0/go.mod h1:nnelYz7RCh+5ahJtPPxZlU+153eP4D4r3EedlOD2RNk=
+github.com/coreos/go-systemd v0.0.0-20190321100706-95778dfbb74e/go.mod h1:F5haX7vjVVG0kc13fIWeqUViNPyEJxv/OmvnBo0Yme4=
+github.com/coreos/pkg v0.0.0-20180928190104-399ea9e2e55f/go.mod h1:E3G3o1h8I7cfcXa63jLwjI0eiQQMgzzUDFVpN/nH/eA=
+github.com/cpuguy83/go-md2man/v2 v2.0.0/go.mod h1:maD7wRr/U5Z6m/iR4s+kqSMx2CaBsrgA7czyZG/E6dU=
+github.com/creack/pty v1.1.9/go.mod h1:oKZEueFk5CKHvIhNR5MUki03XCEU+Q6VDXinZuGJ33E=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/dgrijalva/jwt-go v3.2.0+incompatible/go.mod h1:E3ru+11k8xSBh+hMPgOLZmtrrCbhqsmaPHjLKYnJCaQ=
+github.com/dgryski/go-sip13 v0.0.0-20181026042036-e10d5fee7954/go.mod h1:vAd38F8PWV+bWy6jNmig1y/TA+kYO4g3RSRF0IAv0no=
+github.com/docker/go-units v0.3.3 h1:Xk8S3Xj5sLGlG5g67hJmYMmUgXv5N4PhkjJHHqrwnTk=
+github.com/docker/go-units v0.3.3/go.mod h1:fgPhTUdO+D/Jk86RDLlptpiXQzgHJF7gydDDbaIK4Dk=
+github.com/fatih/color v1.7.0/go.mod h1:Zm6kSWBoL9eyXnKyktHP6abPY2pDugNf5KwzbycvMj4=
+github.com/fsnotify/fsnotify v1.4.7 h1:IXs+QLmnXW2CcXuY+8Mzv/fWEsPGWxqefPtCP5CnV9I=
+github.com/fsnotify/fsnotify v1.4.7/go.mod h1:jwhsz4b93w/PPRr/qN1Yymfu8t87LnFCMoQvtojpjFo=
+github.com/ghodss/yaml v1.0.0/go.mod h1:4dBDuWmgqj2HViK6kFavaiC9ZROes6MMH2rRYeMEF04=
+github.com/go-gl/glfw v0.0.0-20190409004039-e6da0acd62b1/go.mod h1:vR7hzQXu2zJy9AVAgeJqvqgH9Q5CA+iKCZ2gyEVpxRU=
+github.com/go-kit/kit v0.8.0/go.mod h1:xBxKIO96dXMWWy0MnWVtmwkA9/13aqxPnvrjFYMA2as=
+github.com/go-logfmt/logfmt v0.3.0/go.mod h1:Qt1PoO58o5twSAckw1HlFXLmHsOX5/0LbT9GBnD5lWE=
+github.com/go-logfmt/logfmt v0.4.0/go.mod h1:3RMwSq7FuexP4Kalkev3ejPJsZTpXXBr9+V4qmtdjCk=
+github.com/go-stack/stack v1.8.0/go.mod h1:v0f6uXyyMGvRgIKkXu+yp6POWl0qKG85gN/melR3HDY=
+github.com/gogo/protobuf v1.1.1/go.mod h1:r8qH/GZQm5c6nD/R0oafs1akxWv10x8SbQlK7atdtwQ=
+github.com/gogo/protobuf v1.2.1/go.mod h1:hp+jE20tsWTFYpLwKvXlhS1hjn+gTNwPg2I6zVXpSg4=
+github.com/golang/glog v0.0.0-20160126235308-23def4e6c14b/go.mod h1:SBH7ygxi8pfUlaOkMMuAQtPIUF8ecWP5IEl/CR7VP2Q=
+github.com/golang/groupcache v0.0.0-20190129154638-5b532d6fd5ef/go.mod h1:cIg4eruTrX1D+g88fzRXU5OdNfaM+9IcxsU14FzY7Hc=
+github.com/golang/mock v1.1.1/go.mod h1:oTYuIxOrZwtPieC+H1uAHpcLFnEyAGVDL/k47Jfbm0A=
+github.com/golang/mock v1.2.0/go.mod h1:oTYuIxOrZwtPieC+H1uAHpcLFnEyAGVDL/k47Jfbm0A=
+github.com/golang/mock v1.3.1/go.mod h1:sBzyDLLjw3U8JLTeZvSv8jJB+tU5PVekmnlKIyFUx0Y=
+github.com/golang/protobuf v1.2.0/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
+github.com/golang/protobuf v1.3.1/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
+github.com/golang/protobuf v1.3.2/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
+github.com/google/btree v0.0.0-20180813153112-4030bb1f1f0c/go.mod h1:lNA+9X1NB3Zf8V7Ke586lFgjr2dZNuvo3lPJSGZ5JPQ=
+github.com/google/btree v1.0.0/go.mod h1:lNA+9X1NB3Zf8V7Ke586lFgjr2dZNuvo3lPJSGZ5JPQ=
+github.com/google/go-cmp v0.2.0/go.mod h1:oXzfMopK8JAjlY9xF4vHSVASa0yLyX7SntLO5aqRK0M=
+github.com/google/go-cmp v0.3.0/go.mod h1:8QqcDgzrUqlUb/G2PQTWiueGozuR1884gddMywk6iLU=
+github.com/google/martian v2.1.0+incompatible/go.mod h1:9I4somxYTbIHy5NJKHRl3wXiIaQGbYVAs8BPL6v8lEs=
+github.com/google/pprof v0.0.0-20181206194817-3ea8567a2e57/go.mod h1:zfwlbNMJ+OItoe0UupaVj+oy1omPYYDuagoSzA8v9mc=
+github.com/google/pprof v0.0.0-20190515194954-54271f7e092f/go.mod h1:zfwlbNMJ+OItoe0UupaVj+oy1omPYYDuagoSzA8v9mc=
+github.com/google/renameio v0.1.0/go.mod h1:KWCgfxg9yswjAJkECMjeO8J8rahYeXnNhOm40UhjYkI=
+github.com/googleapis/gax-go/v2 v2.0.4/go.mod h1:0Wqv26UfaUD9n4G6kQubkQ+KchISgw+vpHVxEJEs9eg=
+github.com/googleapis/gax-go/v2 v2.0.5/go.mod h1:DWXyrwAJ9X0FpwwEdw+IPEYBICEFu5mhpdKc/us6bOk=
+github.com/gopherjs/gopherjs v0.0.0-20181017120253-0766667cb4d1/go.mod h1:wJfORRmW1u3UXTncJ5qlYoELFm8eSnnEO6hX4iZ3EWY=
 github.com/gorilla/mux v1.8.0 h1:i40aqfkR1h2SlN9hojwV5ZA91wcXFOvkdNIeFDP5koI=
 github.com/gorilla/mux v1.8.0/go.mod h1:DVbg23sWSpFRCP0SfiEN6jmj59UnW/n46BH5rLB71So=
+github.com/gorilla/websocket v1.4.0/go.mod h1:E7qHFY5m1UJ88s3WnNqhKjPHQ0heANvMoAMk2YaljkQ=
+github.com/gorilla/websocket v1.4.1/go.mod h1:YR8l580nyteQvAITg2hZ9XVh4b55+EU/adAjf1fMHhE=
+github.com/gorilla/websocket v1.4.2 h1:+/TMaTYc4QFitKJxsQ7Yye35DkWvkdLcvGKqM+x0Ufc=
+github.com/gorilla/websocket v1.4.2/go.mod h1:YR8l580nyteQvAITg2hZ9XVh4b55+EU/adAjf1fMHhE=
+github.com/grpc-ecosystem/go-grpc-middleware v1.0.0/go.mod h1:FiyG127CGDf3tlThmgyCl78X/SZQqEOJBCDaAfeWzPs=
+github.com/grpc-ecosystem/go-grpc-prometheus v1.2.0/go.mod h1:8NvIoxWQoOIhqOTXgfV/d3M/q6VIi02HzZEHgUlZvzk=
+github.com/grpc-ecosystem/grpc-gateway v1.9.0/go.mod h1:vNeuVxBJEsws4ogUvrchl83t/GYV9WGTSLVdBhOQFDY=
+github.com/hashicorp/consul/api v1.1.0/go.mod h1:VmuI/Lkw1nC05EYQWNKwWGbkg+FbDBtguAZLlVdkD9Q=
+github.com/hashicorp/consul/sdk v0.1.1/go.mod h1:VKf9jXwCTEY1QZP2MOLRhb5i/I/ssyNV1vwHyQBF0x8=
+github.com/hashicorp/cronexpr v1.1.0/go.mod h1:P4wA0KBl9C5q2hABiMO7cp6jcIg96CDh1Efb3g1PWA4=
+github.com/hashicorp/cronexpr v1.1.1 h1:NJZDd87hGXjoZBdvyCF9mX4DCq5Wy7+A/w+A7q0wn6c=
+github.com/hashicorp/cronexpr v1.1.1/go.mod h1:P4wA0KBl9C5q2hABiMO7cp6jcIg96CDh1Efb3g1PWA4=
+github.com/hashicorp/errwrap v1.0.0/go.mod h1:YH+1FKiLXxHSkmPseP+kNlulaMuP3n2brvKWEqk/Jc4=
+github.com/hashicorp/go-cleanhttp v0.5.1/go.mod h1:JpRdi6/HCYpAwUzNwuwqhbovhLtngrth3wmdIIUrZ80=
+github.com/hashicorp/go-cleanhttp v0.5.2 h1:035FKYIWjmULyFRBKPs8TBQoi0x6d9G4xc9neXJWAZQ=
+github.com/hashicorp/go-cleanhttp v0.5.2/go.mod h1:kO/YDlP8L1346E6Sodw+PrpBSV4/SoxCXGY6BqNFT48=
+github.com/hashicorp/go-immutable-radix v1.0.0/go.mod h1:0y9vanUI8NX6FsYoO3zeMjhV/C5i9g4Q3DwcSNZ4P60=
+github.com/hashicorp/go-msgpack v0.5.3/go.mod h1:ahLV/dePpqEmjfWmKiqvPkv/twdG7iPBM1vqhUKIvfM=
+github.com/hashicorp/go-multierror v1.0.0/go.mod h1:dHtQlpGsu+cZNNAkkCN/P3hoUDHhCYQXV3UM06sGGrk=
+github.com/hashicorp/go-rootcerts v1.0.0/go.mod h1:K6zTfqpRlCUIjkwsN4Z+hiSfzSTQa6eBIzfwKfwNnHU=
+github.com/hashicorp/go-rootcerts v1.0.2 h1:jzhAVGtqPKbwpyCPELlgNWhE1znq+qwJtW5Oi2viEzc=
+github.com/hashicorp/go-rootcerts v1.0.2/go.mod h1:pqUvnprVnM5bf7AOirdbb01K4ccR319Vf4pU3K5EGc8=
+github.com/hashicorp/go-sockaddr v1.0.0/go.mod h1:7Xibr9yA9JjQq1JpNB2Vw7kxv8xerXegt+ozgdvDeDU=
+github.com/hashicorp/go-syslog v1.0.0/go.mod h1:qPfqrKkXGihmCqbJM2mZgkZGvKG1dFdvsLplgctolz4=
+github.com/hashicorp/go-uuid v1.0.0/go.mod h1:6SBZvOh/SIDV7/2o3Jml5SYk/TvGqwFJ/bN7x4byOro=
+github.com/hashicorp/go-uuid v1.0.1/go.mod h1:6SBZvOh/SIDV7/2o3Jml5SYk/TvGqwFJ/bN7x4byOro=
+github.com/hashicorp/go.net v0.0.1/go.mod h1:hjKkEWcCURg++eb33jQU7oqQcI9XDCnUzHA0oac0k90=
+github.com/hashicorp/golang-lru v0.5.0/go.mod h1:/m3WP610KZHVQ1SGc6re/UDhFvYD7pJ4Ao+sR/qLZy8=
+github.com/hashicorp/golang-lru v0.5.1/go.mod h1:/m3WP610KZHVQ1SGc6re/UDhFvYD7pJ4Ao+sR/qLZy8=
+github.com/hashicorp/hcl v1.0.0 h1:0Anlzjpi4vEasTeNFn2mLJgTSwt0+6sfsiTG8qcWGx4=
+github.com/hashicorp/hcl v1.0.0/go.mod h1:E5yfLk+7swimpb2L/Alb/PJmXilQ/rhwaUYs4T20WEQ=
+github.com/hashicorp/logutils v1.0.0/go.mod h1:QIAnNjmIWmVIIkWDTG1z5v++HQmx9WQRO+LraFDTW64=
+github.com/hashicorp/mdns v1.0.0/go.mod h1:tL+uN++7HEJ6SQLQ2/p+z2pH24WQKWjBPkE0mNTz8vQ=
+github.com/hashicorp/memberlist v0.1.3/go.mod h1:ajVTdAv/9Im8oMAAj5G31PhhMCZJV2pPBoIllUwCN7I=
+github.com/hashicorp/nomad/api v0.0.0-20210427204147-c519c9054df8 h1:bkAOQ2qusnIRWuGeDDZJlogP5FS1ebCU/SjL9v8PcdY=
+github.com/hashicorp/nomad/api v0.0.0-20210427204147-c519c9054df8/go.mod h1:vYHP9jMXk4/T2qNUbWlQ1OHCA1hHLil3nvqSmz8mtgc=
+github.com/hashicorp/nomad/api v0.0.0-20210430020956-28b8767b278f h1:XaaK4F+pOV2ZYk3aCIDAZThm3voKD6nyOUNeUY3yHgY=
+github.com/hashicorp/nomad/api v0.0.0-20210430020956-28b8767b278f/go.mod h1:vYHP9jMXk4/T2qNUbWlQ1OHCA1hHLil3nvqSmz8mtgc=
+github.com/hashicorp/serf v0.8.2/go.mod h1:6hOLApaqBFA1NXqRQAsxw9QxuDEvNxSQRwA/JwenrHc=
+github.com/inconshreveable/mousetrap v1.0.0 h1:Z8tu5sraLXCXIcARxBp/8cbvlwVa7Z1NHg9XEKhtSvM=
+github.com/inconshreveable/mousetrap v1.0.0/go.mod h1:PxqpIevigyE2G7u3NXJIT2ANytuPF1OarO4DADm73n8=
+github.com/jonboulle/clockwork v0.1.0/go.mod h1:Ii8DK3G1RaLaWxj9trq07+26W01tbo22gdxWY5EU2bo=
+github.com/json-iterator/go v1.1.6/go.mod h1:+SdeFBvtyEkXs7REEP0seUULqWtbJapLOCVDaaPEHmU=
+github.com/jstemmer/go-junit-report v0.0.0-20190106144839-af01ea7f8024/go.mod h1:6v2b51hI/fHJwM22ozAgKL4VKDeJcHhJFhtBdhmNjmU=
+github.com/jtolds/gls v4.20.0+incompatible/go.mod h1:QJZ7F/aHp+rZTRtaJ1ow/lLfFfVYBRgL+9YlvaHOwJU=
+github.com/julienschmidt/httprouter v1.2.0/go.mod h1:SYymIcj16QtmaHHD7aYtjjsJG7VTCxuUUipMqKk8s4w=
+github.com/kisielk/errcheck v1.1.0/go.mod h1:EZBBE59ingxPouuu3KfxchcWSUPOHkagtvWXihfKN4Q=
+github.com/kisielk/gotool v1.0.0/go.mod h1:XhKaO+MFFWcvkIS/tQcRk01m1F5IRFswLeQ+oQHNcck=
+github.com/konsorten/go-windows-terminal-sequences v1.0.1/go.mod h1:T0+1ngSBFLxvqU3pZ+m/2kptfBszLMUkC4ZK/EgS/cQ=
+github.com/kr/logfmt v0.0.0-20140226030751-b84e30acd515/go.mod h1:+0opPa2QZZtGFBFZlji/RkVcI2GknAs/DXo4wKdlNEc=
+github.com/kr/pretty v0.1.0 h1:L/CwN0zerZDmRFUapSPitk6f+Q3+0za1rQkzVuMiMFI=
+github.com/kr/pretty v0.1.0/go.mod h1:dAy3ld7l9f0ibDNOQOHHMYYIIbhfbHSm3C4ZsoJORNo=
+github.com/kr/pty v1.1.1/go.mod h1:pFQYn66WHrOpPYNljwOMqo10TkYh1fy3cYio2l3bCsQ=
+github.com/kr/text v0.1.0/go.mod h1:4Jbv+DJW3UT/LiOwJeYQe1efqtUx/iVham/4vfdArNI=
+github.com/kr/text v0.2.0 h1:5Nx0Ya0ZqY2ygV366QzturHI13Jq95ApcVaJBhpS+AY=
+github.com/kr/text v0.2.0/go.mod h1:eLer722TekiGuMkidMxC/pM04lWEeraHUUmBw8l2grE=
+github.com/magiconair/properties v1.8.0/go.mod h1:PppfXfuXeibc/6YijjN8zIbojt8czPbwD3XqdrwzmxQ=
+github.com/magiconair/properties v1.8.1 h1:ZC2Vc7/ZFkGmsVC9KvOjumD+G5lXy2RtTKyzRKO2BQ4=
+github.com/magiconair/properties v1.8.1/go.mod h1:PppfXfuXeibc/6YijjN8zIbojt8czPbwD3XqdrwzmxQ=
+github.com/mattn/go-colorable v0.0.9/go.mod h1:9vuHe8Xs5qXnSaW/c/ABM9alt+Vo+STaOChaDxuIBZU=
+github.com/mattn/go-isatty v0.0.3/go.mod h1:M+lRXTBqGeGNdLjl/ufCoiOlB5xdOkqRJdNxMWT7Zi4=
+github.com/matttproud/golang_protobuf_extensions v1.0.1/go.mod h1:D8He9yQNgCq6Z5Ld7szi9bcBfOoFv/3dc6xSMkL2PC0=
+github.com/miekg/dns v1.0.14/go.mod h1:W1PPwlIAgtquWBMBEV9nkV9Cazfe8ScdGz/Lj7v3Nrg=
+github.com/mitchellh/cli v1.0.0/go.mod h1:hNIlj7HEI86fIcpObd7a0FcrxTWetlwJDGcceTlRvqc=
+github.com/mitchellh/go-homedir v1.0.0/go.mod h1:SfyaCUpYCn1Vlf4IUYiD9fPX4A5wJrkLzIz1N1q0pr0=
+github.com/mitchellh/go-homedir v1.1.0 h1:lukF9ziXFxDFPkA1vsr5zpc1XuPDn/wFntq5mG+4E0Y=
+github.com/mitchellh/go-homedir v1.1.0/go.mod h1:SfyaCUpYCn1Vlf4IUYiD9fPX4A5wJrkLzIz1N1q0pr0=
+github.com/mitchellh/go-testing-interface v1.0.0 h1:fzU/JVNcaqHQEcVFAKeR41fkiLdIPrefOvVG1VZ96U0=
+github.com/mitchellh/go-testing-interface v1.0.0/go.mod h1:kRemZodwjscx+RGhAo8eIhFbs2+BFgRtFPeD/KE+zxI=
+github.com/mitchellh/gox v0.4.0/go.mod h1:Sd9lOJ0+aimLBi73mGofS1ycjY8lL3uZM3JPS42BGNg=
+github.com/mitchellh/iochan v1.0.0/go.mod h1:JwYml1nuB7xOzsp52dPpHFffvOCDupsG0QubkSMEySY=
+github.com/mitchellh/mapstructure v0.0.0-20160808181253-ca63d7c062ee/go.mod h1:FVVH3fgwuzCH5S8UJGiWEs2h04kUh9fWfEaFds41c1Y=
+github.com/mitchellh/mapstructure v1.1.2/go.mod h1:FVVH3fgwuzCH5S8UJGiWEs2h04kUh9fWfEaFds41c1Y=
+github.com/mitchellh/mapstructure v1.3.3/go.mod h1:bFUtVrKA4DC2yAKiSyO/QUcy7e+RRV2QTWOzhPopBRo=
+github.com/mitchellh/mapstructure v1.4.1 h1:CpVNEelQCZBooIPDn+AR3NpivK/TIKU8bDxdASFVQag=
+github.com/mitchellh/mapstructure v1.4.1/go.mod h1:bFUtVrKA4DC2yAKiSyO/QUcy7e+RRV2QTWOzhPopBRo=
+github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd/go.mod h1:6dJC0mAP4ikYIbvyc7fijjWJddQyLn8Ig3JB5CqoB9Q=
+github.com/modern-go/reflect2 v1.0.1/go.mod h1:bx2lNnkwVCuqBIxFjflWJWanXIb3RllmbCylyMrvgv0=
+github.com/mwitkow/go-conntrack v0.0.0-20161129095857-cc309e4a2223/go.mod h1:qRWi+5nqEBWmkhHvq77mSJWrCKwh8bxhgT7d/eI7P4U=
+github.com/oklog/ulid v1.3.1/go.mod h1:CirwcVhetQ6Lv90oh/F+FBtV6XMibvdAFo93nm5qn4U=
+github.com/pascaldekloe/goe v0.0.0-20180627143212-57f6aae5913c/go.mod h1:lzWF7FIEvWOWxwDKqyGYQf6ZUaNfKdP144TG7ZOy1lc=
+github.com/pelletier/go-toml v1.2.0 h1:T5zMGML61Wp+FlcbWjRDT7yAxhJNAiPPLOFECq181zc=
+github.com/pelletier/go-toml v1.2.0/go.mod h1:5z9KED0ma1S8pY6P1sdut58dfprrGBbd/94hg7ilaic=
+github.com/pkg/errors v0.8.0/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
+github.com/pkg/errors v0.8.1 h1:iURUrRGxPUNPdy5/HRSm+Yj6okJ6UtLINN0Q9M4+h3I=
+github.com/pkg/errors v0.8.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/posener/complete v1.1.1/go.mod h1:em0nMJCgc9GFtwrmVmEMR/ZL6WyhyjMBndrE9hABlRI=
+github.com/prometheus/client_golang v0.9.1/go.mod h1:7SWBe2y4D6OKWSNQJUaRYU/AaXPKyh/dDVn+NZz0KFw=
+github.com/prometheus/client_golang v0.9.3/go.mod h1:/TN21ttK/J9q6uSwhBd54HahCDft0ttaMvbicHlPoso=
+github.com/prometheus/client_model v0.0.0-20180712105110-5c3871d89910/go.mod h1:MbSGuTsp3dbXC40dX6PRTWyKYBIrTGTE9sqQNg2J8bo=
+github.com/prometheus/client_model v0.0.0-20190129233127-fd36f4220a90/go.mod h1:xMI15A0UPsDsEKsMN9yxemIoYk6Tm2C1GtYGdfGttqA=
+github.com/prometheus/common v0.0.0-20181113130724-41aa239b4cce/go.mod h1:daVV7qP5qjZbuso7PdcryaAu0sAZbrN9i7WWcTMWvro=
+github.com/prometheus/common v0.4.0/go.mod h1:TNfzLD0ON7rHzMJeJkieUDPYmFC7Snx/y86RQel1bk4=
+github.com/prometheus/procfs v0.0.0-20181005140218-185b4288413d/go.mod h1:c3At6R/oaqEKCNdg8wHV1ftS6bRYblBhIjjI8uT2IGk=
+github.com/prometheus/procfs v0.0.0-20190507164030-5867b95ac084/go.mod h1:TjEm7ze935MbeOT/UhFTIMYKhuLP4wbCsTZCD3I8kEA=
+github.com/prometheus/tsdb v0.7.1/go.mod h1:qhTCs0VvXwvX/y3TZrWD7rabWM+ijKTux40TwIPHuXU=
+github.com/rogpeppe/fastuuid v0.0.0-20150106093220-6724a57986af/go.mod h1:XWv6SoW27p1b0cqNHllgS5HIMJraePCO15w5zCzIWYg=
+github.com/rogpeppe/go-internal v1.3.0/go.mod h1:M8bDsm7K2OlrFYOpmOWEs/qY81heoFRclV5y23lUDJ4=
+github.com/rs/xid v1.2.1/go.mod h1:+uKXf+4Djp6Md1KODXJxgGQPKngRmWyn10oCKFzNHOQ=
+github.com/rs/zerolog v1.18.0 h1:CbAm3kP2Tptby1i9sYy2MGRg0uxIN9cyDb59Ys7W8z8=
+github.com/rs/zerolog v1.18.0/go.mod h1:9nvC1axdVrAHcu/s9taAVfBuIdTZLVQmKQyvrUjF5+I=
+github.com/russross/blackfriday/v2 v2.0.1/go.mod h1:+Rmxgy9KzJVeS9/2gXHxylqXiyQDYRxCVz55jmeOWTM=
+github.com/ryanuber/columnize v0.0.0-20160712163229-9b3edd62028f/go.mod h1:sm1tb6uqfes/u+d4ooFouqFdy9/2g9QGwK3SQygK0Ts=
+github.com/sean-/seed v0.0.0-20170313163322-e2103e2c3529/go.mod h1:DxrIzT+xaE7yg65j358z/aeFdxmN0P9QXhEzd20vsDc=
+github.com/shurcooL/sanitized_anchor_name v1.0.0/go.mod h1:1NzhyTcUVG4SuEtjjoZeVRXNmyL/1OwPU0+IJeTBvfc=
+github.com/sirupsen/logrus v1.2.0/go.mod h1:LxeOpSwHxABJmUn/MG1IvRgCAasNZTLOkJPxbbu5VWo=
 github.com/sirupsen/logrus v1.8.1 h1:dJKuHgqk1NNQlqoA6BTlM1Wf9DOH3NBjQyu0h9+AZZE=
 github.com/sirupsen/logrus v1.8.1/go.mod h1:yWOB1SBYBC5VeMP7gHvWumXLIWorT60ONWic61uBYv0=
+github.com/smartystreets/assertions v0.0.0-20180927180507-b2de0cb4f26d/go.mod h1:OnSkiWE9lh6wB0YB77sQom3nweQdgAjqCqsofrRNTgc=
+github.com/smartystreets/goconvey v1.6.4/go.mod h1:syvi0/a8iFYH4r/RixwvyeAJjdLS9QV7WQ/tjFTllLA=
+github.com/soheilhy/cmux v0.1.4/go.mod h1:IM3LyeVVIOuxMH7sFAkER9+bJ4dT7Ms6E4xg4kGIyLM=
+github.com/spaolacci/murmur3 v0.0.0-20180118202830-f09979ecbc72/go.mod h1:JwIasOWyU6f++ZhiEuf87xNszmSA2myDM2Kzu9HwQUA=
+github.com/spf13/afero v1.1.2 h1:m8/z1t7/fwjysjQRYbP0RD+bUIF/8tJwPdEZsI83ACI=
+github.com/spf13/afero v1.1.2/go.mod h1:j4pytiNVoe2o6bmDsKpLACNPDBIoEAkihy7loJ1B0CQ=
+github.com/spf13/cast v1.3.0 h1:oget//CVOEoFewqQxwr0Ej5yjygnqGkvggSE/gB35Q8=
+github.com/spf13/cast v1.3.0/go.mod h1:Qx5cxh0v+4UWYiBimWS+eyWzqEqokIECu5etghLkUJE=
+github.com/spf13/cobra v1.0.0 h1:6m/oheQuQ13N9ks4hubMG6BnvwOeaJrqSPLahSnczz8=
+github.com/spf13/cobra v1.0.0/go.mod h1:/6GTrnGXV9HjY+aR4k0oJ5tcvakLuG6EuKReYlHNrgE=
+github.com/spf13/jwalterweatherman v1.0.0 h1:XHEdyB+EcvlqZamSM4ZOMGlc93t6AcsBEu9Gc1vn7yk=
+github.com/spf13/jwalterweatherman v1.0.0/go.mod h1:cQK4TGJAtQXfYWX+Ddv3mKDzgVb68N+wFjFa4jdeBTo=
+github.com/spf13/pflag v1.0.3 h1:zPAT6CGy6wXeQ7NtTnaTerfKOsV6V6F8agHXFiazDkg=
+github.com/spf13/pflag v1.0.3/go.mod h1:DYY7MBk1bdzusC3SYhjObp+wFpr4gzcvqqNjLnInEg4=
+github.com/spf13/viper v1.4.0/go.mod h1:PTJ7Z/lr49W6bUbkmS1V3by4uWynFiR9p7+dSq/yZzE=
+github.com/spf13/viper v1.7.0 h1:xVKxvI7ouOI5I+U9s2eeiUfMaWBVoXA3AWskkrqK0VM=
+github.com/spf13/viper v1.7.0/go.mod h1:8WkrPz2fc9jxqZNCJI/76HCieCp4Q8HaLFoCha5qpdg=
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
+github.com/stretchr/objx v0.1.1 h1:2vfRuCMp5sSVIDSqO8oNnWJq7mPa6KVP3iPIwFBuy8A=
+github.com/stretchr/objx v0.1.1/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
 github.com/stretchr/testify v1.2.2/go.mod h1:a8OnRcib4nhh0OaRAV+Yts87kKdq0PP7pXfy6kDkUVs=
+github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI=
+github.com/stretchr/testify v1.5.1/go.mod h1:5W2xD1RspED5o8YsWQXVCued0rvSQ+mT+I5cxcmMvtA=
 github.com/stretchr/testify v1.7.0 h1:nwc3DEeHmmLAfoZucVR881uASk0Mfjw8xYJ99tb5CcY=
 github.com/stretchr/testify v1.7.0/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
+github.com/subosito/gotenv v1.2.0 h1:Slr1R9HxAlEKefgq5jn9U+DnETlIUa6HfgEzj0g5d7s=
+github.com/subosito/gotenv v1.2.0/go.mod h1:N0PQaV/YGNqwC0u51sEeR/aUtSLEXKX9iv69rRypqCw=
+github.com/tmc/grpc-websocket-proxy v0.0.0-20190109142713-0ad062ec5ee5/go.mod h1:ncp9v5uamzpCO7NfCPTXjqaC+bZgJeR0sMTm6dMHP7U=
+github.com/ugorji/go v1.1.4/go.mod h1:uQMGLiO92mf5W77hV/PUCpI3pbzQx3CRekS0kk+RGrc=
+github.com/vektra/mockery v1.1.2 h1:uc0Yn67rJpjt8U/mAZimdCKn9AeA97BOkjpmtBSlfP4=
+github.com/vektra/mockery v1.1.2/go.mod h1:VcfZjKaFOPO+MpN4ZvwPjs4c48lkq1o3Ym8yHZJu0jU=
+github.com/vektra/mockery/v2 v2.7.4 h1:GCtKjWqi6rC0hauletxdCYXR0XdAzsjVWlRdPBdpXbg=
+github.com/vektra/mockery/v2 v2.7.4/go.mod h1:2gU4Cf/f8YyC8oEaSXfCnZBMxMjMl/Ko205rlP0fO90=
+github.com/xiang90/probing v0.0.0-20190116061207-43a291ad63a2/go.mod h1:UETIi67q53MR2AWcXfiuqkDkRtnGDLqkBTpCHuJHxtU=
+github.com/xordataexchange/crypt v0.0.3-0.20170626215501-b2862e3d0a77/go.mod h1:aYKd//L2LvnjZzWKhF00oedf4jCCReLcmhLdhm1A27Q=
+github.com/yuin/goldmark v1.1.25/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9decYSb74=
+github.com/zenazn/goji v0.9.0/go.mod h1:7S9M489iMyHBNxwZnk9/EHS098H4/F6TATF2mIxtB1Q=
+go.etcd.io/bbolt v1.3.2/go.mod h1:IbVyRI1SCnLcuJnV2u8VeU0CEYM7e686BmAb1XKL+uU=
+go.opencensus.io v0.21.0/go.mod h1:mSImk1erAIZhrmZN+AvHh14ztQfjbGwt4TtuofqLduU=
+go.opencensus.io v0.22.0/go.mod h1:+kGneAE2xo2IficOXnaByMWTGM9T73dGwxeWcUqIpI8=
+go.uber.org/atomic v1.4.0/go.mod h1:gD2HeocX3+yG+ygLZcrzQJaqmWj9AIm7n08wl/qW/PE=
+go.uber.org/multierr v1.1.0/go.mod h1:wR5kodmAFQ0UK8QlbwjlSNy0Z68gJhDJUG5sjR94q/0=
+go.uber.org/zap v1.10.0/go.mod h1:vwi/ZaCAaUcBkycHslxD9B2zi4UTXhF60s6SWpuDF0Q=
+golang.org/x/crypto v0.0.0-20180904163835-0709b304e793/go.mod h1:6SG95UA2DQfeDnfUPMdvaQW0Q7yPrPDi9nlGo2tz2b4=
+golang.org/x/crypto v0.0.0-20181029021203-45a5f77698d3/go.mod h1:6SG95UA2DQfeDnfUPMdvaQW0Q7yPrPDi9nlGo2tz2b4=
+golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
+golang.org/x/crypto v0.0.0-20190510104115-cbcb75029529/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
+golang.org/x/crypto v0.0.0-20190605123033-f99c8df09eb5/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
+golang.org/x/crypto v0.0.0-20191011191535-87dc89f01550 h1:ObdrDkeb4kJdCP557AjRjq69pTHfNouLtWZG7j9rPN8=
+golang.org/x/crypto v0.0.0-20191011191535-87dc89f01550/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
+golang.org/x/exp v0.0.0-20190121172915-509febef88a4/go.mod h1:CJ0aWSM057203Lf6IL+f9T1iT9GByDxfZKAQTCR3kQA=
+golang.org/x/exp v0.0.0-20190306152737-a1d7652674e8/go.mod h1:CJ0aWSM057203Lf6IL+f9T1iT9GByDxfZKAQTCR3kQA=
+golang.org/x/exp v0.0.0-20190510132918-efd6b22b2522/go.mod h1:ZjyILWgesfNpC6sMxTJOJm9Kp84zZh5NQWvqDGG3Qr8=
+golang.org/x/exp v0.0.0-20190829153037-c13cbed26979/go.mod h1:86+5VVa7VpoJ4kLfm080zCjGlMRFzhUhsZKEZO7MGek=
+golang.org/x/exp v0.0.0-20191030013958-a1ab85dbe136/go.mod h1:JXzH8nQsPlswgeRAPE3MuO9GYsAcnJvJ4vnMwN/5qkY=
+golang.org/x/image v0.0.0-20190227222117-0694c2d4d067/go.mod h1:kZ7UVZpmo3dzQBMxlp+ypCbDeSB+sBbTgSJuh5dn5js=
+golang.org/x/image v0.0.0-20190802002840-cff245a6509b/go.mod h1:FeLwcggjj3mMvU+oOTbSwawSJRM1uh48EjtB4UJZlP0=
+golang.org/x/lint v0.0.0-20181026193005-c67002cb31c3/go.mod h1:UVdnD1Gm6xHRNCYTkRU2/jEulfH38KcIWyp/GAMgvoE=
+golang.org/x/lint v0.0.0-20190227174305-5b3e6a55c961/go.mod h1:wehouNa3lNwaWXcvxsM5YxQ5yQlVC4a0KAMCusXpPoU=
+golang.org/x/lint v0.0.0-20190301231843-5614ed5bae6f/go.mod h1:UVdnD1Gm6xHRNCYTkRU2/jEulfH38KcIWyp/GAMgvoE=
+golang.org/x/lint v0.0.0-20190313153728-d0100b6bd8b3/go.mod h1:6SW0HCj/g11FgYtHlgUYUwCkIfeOF89ocIRzGO/8vkc=
+golang.org/x/lint v0.0.0-20190409202823-959b441ac422/go.mod h1:6SW0HCj/g11FgYtHlgUYUwCkIfeOF89ocIRzGO/8vkc=
+golang.org/x/lint v0.0.0-20190909230951-414d861bb4ac/go.mod h1:6SW0HCj/g11FgYtHlgUYUwCkIfeOF89ocIRzGO/8vkc=
+golang.org/x/lint v0.0.0-20190930215403-16217165b5de/go.mod h1:6SW0HCj/g11FgYtHlgUYUwCkIfeOF89ocIRzGO/8vkc=
+golang.org/x/mobile v0.0.0-20190312151609-d3739f865fa6/go.mod h1:z+o9i4GpDbdi3rU15maQ/Ox0txvL9dWGYEHz965HBQE=
+golang.org/x/mobile v0.0.0-20190719004257-d2bd2a29d028/go.mod h1:E/iHnbuqvinMTCcRqshq8CkpyQDoeVncDDYHnLhea+o=
+golang.org/x/mod v0.0.0-20190513183733-4bf6d317e70e/go.mod h1:mXi4GBBbnImb6dmsKGUJ2LatrhH/nqhxcFungHvyanc=
+golang.org/x/mod v0.1.0/go.mod h1:0QHyrYULN0/3qlju5TqG8bIK38QM8yzMo5ekMj3DlcY=
+golang.org/x/mod v0.2.0 h1:KU7oHjnv3XNWfa5COkzUifxZmxp1TyI7ImMXqFxLwvQ=
+golang.org/x/mod v0.2.0/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
+golang.org/x/net v0.0.0-20180724234803-3673e40ba225/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
+golang.org/x/net v0.0.0-20180826012351-8a410e7b638d/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
+golang.org/x/net v0.0.0-20181023162649-9b4f9f5ad519/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
+golang.org/x/net v0.0.0-20181114220301-adae6a3d119a/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
+golang.org/x/net v0.0.0-20181201002055-351d144fa1fc/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
+golang.org/x/net v0.0.0-20181220203305-927f97764cc3/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
+golang.org/x/net v0.0.0-20190108225652-1e06a53dbb7e/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
+golang.org/x/net v0.0.0-20190213061140-3a22650c66bd/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
+golang.org/x/net v0.0.0-20190311183353-d8887717615a/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
+golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
+golang.org/x/net v0.0.0-20190501004415-9ce7a6920f09/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
+golang.org/x/net v0.0.0-20190503192946-f4e77d36d62c/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
+golang.org/x/net v0.0.0-20190522155817-f3200d17e092/go.mod h1:HSz+uSET+XFnRR8LxR5pz3Of3rY3CfYBVs4xY44aLks=
+golang.org/x/net v0.0.0-20190603091049-60506f45cf65/go.mod h1:HSz+uSET+XFnRR8LxR5pz3Of3rY3CfYBVs4xY44aLks=
+golang.org/x/net v0.0.0-20190620200207-3b0461eec859/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
+golang.org/x/net v0.0.0-20200226121028-0de0cce0169b/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
+golang.org/x/oauth2 v0.0.0-20180821212333-d2e6202438be/go.mod h1:N/0e6XlmueqKjAGxoOufVs8QHGRruUQn6yWY3a++T0U=
+golang.org/x/oauth2 v0.0.0-20190226205417-e64efc72b421/go.mod h1:gOpvHmFTYa4IltrdGE7lF6nIHvwfUNPOp7c8zoXwtLw=
+golang.org/x/oauth2 v0.0.0-20190604053449-0f29369cfe45/go.mod h1:gOpvHmFTYa4IltrdGE7lF6nIHvwfUNPOp7c8zoXwtLw=
+golang.org/x/sync v0.0.0-20180314180146-1d60e4601c6f/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
+golang.org/x/sync v0.0.0-20181108010431-42b317875d0f/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
+golang.org/x/sync v0.0.0-20181221193216-37e7f081c4d4/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
+golang.org/x/sync v0.0.0-20190227155943-e225da77a7e6/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
+golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
+golang.org/x/sync v0.0.0-20190911185100-cd5d95a43a6e/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
+golang.org/x/sys v0.0.0-20180823144017-11551d06cbcc/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
+golang.org/x/sys v0.0.0-20180830151530-49385e6e1522/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
+golang.org/x/sys v0.0.0-20180905080454-ebe1bf3edb33/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
+golang.org/x/sys v0.0.0-20181026203630-95b1ffbd15a5/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
+golang.org/x/sys v0.0.0-20181107165924-66b7b1311ac8/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
+golang.org/x/sys v0.0.0-20181116152217-5ac8a444bdc5/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
+golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
+golang.org/x/sys v0.0.0-20190312061237-fead79001313/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20190412213103-97732733099d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20190502145724-3ef323f4f1fd/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20190507160741-ecd444e8653b/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20190606165138-5da285871e9c/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20190624142023-c5567b49c5d0/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20191026070338-33540a1f6037/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20210426230700-d19ff857e887 h1:dXfMednGJh/SUUFjTLsWJz3P+TQt9qnR11GgeI3vWKs=
 golang.org/x/sys v0.0.0-20210426230700-d19ff857e887/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
+golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
+golang.org/x/text v0.3.1-0.20180807135948-17ff2d5776d2/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
+golang.org/x/text v0.3.2 h1:tW2bmiBqwgJj/UpqtC8EpXEZVYOwU0yG4iWbprSVAcs=
+golang.org/x/text v0.3.2/go.mod h1:bEr9sfX3Q8Zfm5fL9x+3itogRgK3+ptLWKqgva+5dAk=
+golang.org/x/time v0.0.0-20181108054448-85acf8d2951c/go.mod h1:tRJNPiyCQ0inRvYxbN9jk5I+vvW/OXSQhTDSoE431IQ=
+golang.org/x/time v0.0.0-20190308202827-9d24e82272b4/go.mod h1:tRJNPiyCQ0inRvYxbN9jk5I+vvW/OXSQhTDSoE431IQ=
+golang.org/x/tools v0.0.0-20180221164845-07fd8470d635/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
+golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
+golang.org/x/tools v0.0.0-20190114222345-bf090417da8b/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
+golang.org/x/tools v0.0.0-20190226205152-f727befe758c/go.mod h1:9Yl7xja0Znq3iFh3HoIrodX9oNMXvdceNzlUR8zjMvY=
+golang.org/x/tools v0.0.0-20190311212946-11955173bddd/go.mod h1:LCzVGOaR6xXOjkQ3onu1FJEFr0SW1gC7cKk1uF8kGRs=
+golang.org/x/tools v0.0.0-20190312151545-0bb0c0a6e846/go.mod h1:LCzVGOaR6xXOjkQ3onu1FJEFr0SW1gC7cKk1uF8kGRs=
+golang.org/x/tools v0.0.0-20190312170243-e65039ee4138/go.mod h1:LCzVGOaR6xXOjkQ3onu1FJEFr0SW1gC7cKk1uF8kGRs=
+golang.org/x/tools v0.0.0-20190328211700-ab21143f2384/go.mod h1:LCzVGOaR6xXOjkQ3onu1FJEFr0SW1gC7cKk1uF8kGRs=
+golang.org/x/tools v0.0.0-20190425150028-36563e24a262/go.mod h1:RgjU9mgBXZiqYHBnxXauZ1Gv1EHHAz9KjViQ78xBX0Q=
+golang.org/x/tools v0.0.0-20190506145303-2d16b83fe98c/go.mod h1:RgjU9mgBXZiqYHBnxXauZ1Gv1EHHAz9KjViQ78xBX0Q=
+golang.org/x/tools v0.0.0-20190606124116-d0a3d012864b/go.mod h1:/rFqwRUd4F7ZHNgwSSTFct+R/Kf4OFW1sUzUTQQTgfc=
+golang.org/x/tools v0.0.0-20190621195816-6e04913cbbac/go.mod h1:/rFqwRUd4F7ZHNgwSSTFct+R/Kf4OFW1sUzUTQQTgfc=
+golang.org/x/tools v0.0.0-20190628153133-6cdbf07be9d0/go.mod h1:/rFqwRUd4F7ZHNgwSSTFct+R/Kf4OFW1sUzUTQQTgfc=
+golang.org/x/tools v0.0.0-20190816200558-6889da9d5479/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
+golang.org/x/tools v0.0.0-20190828213141-aed303cbaa74/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
+golang.org/x/tools v0.0.0-20190911174233-4f2ddba30aff/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
+golang.org/x/tools v0.0.0-20191012152004-8de300cfc20a/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
+golang.org/x/tools v0.0.0-20191112195655-aa38f8e97acc/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
+golang.org/x/tools v0.0.0-20191119224855-298f0cb1881e/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
+golang.org/x/tools v0.0.0-20200323144430-8dcfad9e016e h1:ssd5ulOvVWlh4kDSUF2SqzmMeWfjmwDXM+uGw/aQjRE=
+golang.org/x/tools v0.0.0-20200323144430-8dcfad9e016e/go.mod h1:Sl4aGygMT6LrqrWclx+PTx3U+LnKx/seiNR+3G19Ar8=
+golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
+golang.org/x/xerrors v0.0.0-20191011141410-1b5146add898/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
+golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543 h1:E7g+9GITq07hpfrRu66IVDexMakfv52eLZ2CXBWiKr4=
+golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
+google.golang.org/api v0.4.0/go.mod h1:8k5glujaEP+g9n7WNsDg8QP6cUVNI86fCNMcbazEtwE=
+google.golang.org/api v0.7.0/go.mod h1:WtwebWUNSVBH/HAw79HIFXZNqEvBhG+Ra+ax0hx3E3M=
+google.golang.org/api v0.8.0/go.mod h1:o4eAsZoiT+ibD93RtjEohWalFOjRDx6CVaqeizhEnKg=
+google.golang.org/api v0.9.0/go.mod h1:o4eAsZoiT+ibD93RtjEohWalFOjRDx6CVaqeizhEnKg=
+google.golang.org/api v0.13.0/go.mod h1:iLdEw5Ide6rF15KTC1Kkl0iskquN2gFfn9o9XIsbkAI=
+google.golang.org/appengine v1.1.0/go.mod h1:EbEs0AVv82hx2wNQdGPgUI5lhzA/G0D9YwlJXL52JkM=
+google.golang.org/appengine v1.4.0/go.mod h1:xpcJRLb0r/rnEns0DIKYYv+WjYCduHsrkT7/EB5XEv4=
+google.golang.org/appengine v1.5.0/go.mod h1:xpcJRLb0r/rnEns0DIKYYv+WjYCduHsrkT7/EB5XEv4=
+google.golang.org/appengine v1.6.1/go.mod h1:i06prIuMbXzDqacNJfV5OdTW448YApPu5ww/cMBSeb0=
+google.golang.org/genproto v0.0.0-20180817151627-c66870c02cf8/go.mod h1:JiN7NxoALGmiZfu7CAH4rXhgtRTLTxftemlI0sWmxmc=
+google.golang.org/genproto v0.0.0-20190307195333-5fe7a883aa19/go.mod h1:VzzqZJRnGkLBvHegQrXjBqPurQTc5/KpmUdxsrq26oE=
+google.golang.org/genproto v0.0.0-20190418145605-e7d98fc518a7/go.mod h1:VzzqZJRnGkLBvHegQrXjBqPurQTc5/KpmUdxsrq26oE=
+google.golang.org/genproto v0.0.0-20190425155659-357c62f0e4bb/go.mod h1:VzzqZJRnGkLBvHegQrXjBqPurQTc5/KpmUdxsrq26oE=
+google.golang.org/genproto v0.0.0-20190502173448-54afdca5d873/go.mod h1:VzzqZJRnGkLBvHegQrXjBqPurQTc5/KpmUdxsrq26oE=
+google.golang.org/genproto v0.0.0-20190801165951-fa694d86fc64/go.mod h1:DMBHOl98Agz4BDEuKkezgsaosCRResVns1a3J2ZsMNc=
+google.golang.org/genproto v0.0.0-20190819201941-24fa4b261c55/go.mod h1:DMBHOl98Agz4BDEuKkezgsaosCRResVns1a3J2ZsMNc=
+google.golang.org/genproto v0.0.0-20190911173649-1774047e7e51/go.mod h1:IbNlFCBrqXvoKpeg0TB2l7cyZUmoaFKYIwrEpbDKLA8=
+google.golang.org/genproto v0.0.0-20191108220845-16a3f7862a1a/go.mod h1:n3cpQtvxv34hfy77yVDNjmbRyujviMdxYliBSkLhpCc=
+google.golang.org/grpc v1.19.0/go.mod h1:mqu4LbDTu4XGKhr4mRzUsmM4RtVoemTSY81AxZiDr8c=
+google.golang.org/grpc v1.20.1/go.mod h1:10oTOabMzJvdu6/UiuZezV6QK5dSlG84ov/aaiqXj38=
+google.golang.org/grpc v1.21.0/go.mod h1:oYelfM1adQP15Ek0mdvEgi9Df8B9CZIaU1084ijfRaM=
+google.golang.org/grpc v1.21.1/go.mod h1:oYelfM1adQP15Ek0mdvEgi9Df8B9CZIaU1084ijfRaM=
+gopkg.in/alecthomas/kingpin.v2 v2.2.6/go.mod h1:FMv+mEhP44yOT+4EoQTLFTRgOQ1FBLkstjWtayDeSgw=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15 h1:YR8cESwS4TdDjEe65xsg0ogRM/Nc3DYOhEAlW+xobZo=
+gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/errgo.v2 v2.1.0/go.mod h1:hNsd1EY+bozCKY1Ytp96fpM3vjJbqLJn88ws8XvfDNI=
+gopkg.in/ini.v1 v1.51.0 h1:AQvPpx3LzTDM0AjnIRlVFwFFGC+npRopjZxLJj6gdno=
+gopkg.in/ini.v1 v1.51.0/go.mod h1:pNLf8WUiyNEtQjuu5G5vTm06TEv9tsIgeAvK8hOrP4k=
+gopkg.in/resty.v1 v1.12.0/go.mod h1:mDo4pnntr5jdWRML875a/NmxYqAlA73dVijT2AXvQQo=
+gopkg.in/yaml.v2 v2.0.0-20170812160011-eb3733d160e7/go.mod h1:JAlM8MvJe8wmxCU4Bli9HhUf9+ttbYbLASfIpnQbh74=
+gopkg.in/yaml.v2 v2.2.1/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
+gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
+gopkg.in/yaml.v2 v2.2.4/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
+gopkg.in/yaml.v2 v2.2.8 h1:obN1ZagJSUGI0Ek/LBmuj4SNLPfIny3KsKFopxRdj10=
+gopkg.in/yaml.v2 v2.2.8/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
 gopkg.in/yaml.v3 v3.0.0-20210107192922-496545a6307b h1:h8qDotaEPuJATrMmW04NCwg7v22aHH28wwpauUhK9Oo=
 gopkg.in/yaml.v3 v3.0.0-20210107192922-496545a6307b/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
+honnef.co/go/tools v0.0.0-20190102054323-c2f93a96b099/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
+honnef.co/go/tools v0.0.0-20190106161140-3f1c8253044a/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
+honnef.co/go/tools v0.0.0-20190418001031-e561f6794a2a/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
+honnef.co/go/tools v0.0.1-2019.2.3/go.mod h1:a3bituU0lyd329TUQxRnasdCoJDkEUEAqEt0JzvZhAg=
+rsc.io/binaryregexp v0.2.0/go.mod h1:qTv7/COck+e2FymRvadv62gMdZztPaShugOCi3I+8D8=

main.go

@@ -2,10 +2,12 @@ package main
 
 import (
 	"context"
-	"fmt"
 	"gitlab.hpi.de/codeocean/codemoon/poseidon/api"
 	"gitlab.hpi.de/codeocean/codemoon/poseidon/config"
+	"gitlab.hpi.de/codeocean/codemoon/poseidon/environment"
+	"gitlab.hpi.de/codeocean/codemoon/poseidon/environment/pool"
 	"gitlab.hpi.de/codeocean/codemoon/poseidon/logging"
+	"gitlab.hpi.de/codeocean/codemoon/poseidon/nomad"
 	"net/http"
 	"os"
 	"os/signal"
@@ -36,28 +38,45 @@ func runServer(server *http.Server) {
 	}
 }
 
-func main() {
+func initServer() *http.Server {
-	config.InitConfig()
+	return &http.Server{
-	logging.InitializeLogging(config.Config.Logger.Level)
+		Addr:         config.Config.PoseidonAPIURL().Host,
-
-	server := &http.Server{
-		Addr:         fmt.Sprintf("%s:%d", config.Config.Server.Address, config.Config.Server.Port),
 		WriteTimeout: time.Second * 15,
 		ReadTimeout:  time.Second * 15,
 		IdleTimeout:  time.Second * 60,
 		Handler:      api.NewRouter(),
 	}
+}
 
-	go runServer(server)
+// shutdownOnOSSignal listens for a signal from the operation system
-
+// When receiving a signal the server shuts down but waits up to 15 seconds to close remaining connections
+func shutdownOnOSSignal(server *http.Server) {
 	// wait for SIGINT
 	signals := make(chan os.Signal, 1)
 	signal.Notify(signals, os.Interrupt)
 	<-signals
 	log.Info("Received SIGINT, shutting down ...")
 
-	// shutdown the server but wait up to 15 seconds to close remaining connections
 	ctx, cancel := context.WithTimeout(context.Background(), 15*time.Second)
 	defer cancel()
 	_ = server.Shutdown(ctx)
 }
+
+func main() {
+	config.InitConfig()
+	logging.InitializeLogging(config.Config.Logger.Level)
+	server := initServer()
+	log.WithField("address", server.Addr).Info("Starting server")
+
+	// API initialization
+	nomadAPIClient, err := nomad.New(config.Config.NomadAPIURL())
+	if err != nil {
+		log.WithError(err).WithField("nomad url", config.Config.NomadAPIURL()).Fatal("Error parsing the nomad url")
+	}
+	// ToDo: Move to create execution environment
+	runnersPool := pool.NewLocalRunnerPool()
+	environment.DebugInit(runnersPool, nomadAPIClient)
+
+	go runServer(server)
+	shutdownOnOSSignal(server)
+}

mocks/ExecutorApi.go

@@ -0,0 +1,94 @@
+// Code generated by mockery v0.0.0-dev. DO NOT EDIT.
+
+package mocks
+
+import (
+	api "github.com/hashicorp/nomad/api"
+	mock "github.com/stretchr/testify/mock"
+)
+
+// ExecutorApi is an autogenerated mock type for the ExecutorApi type
+type ExecutorApi struct {
+	mock.Mock
+}
+
+// GetJobScale provides a mock function with given fields: jobId
+func (_m *ExecutorApi) GetJobScale(jobId string) (int, error) {
+	ret := _m.Called(jobId)
+
+	var r0 int
+	if rf, ok := ret.Get(0).(func(string) int); ok {
+		r0 = rf(jobId)
+	} else {
+		r0 = ret.Get(0).(int)
+	}
+
+	var r1 error
+	if rf, ok := ret.Get(1).(func(string) error); ok {
+		r1 = rf(jobId)
+	} else {
+		r1 = ret.Error(1)
+	}
+
+	return r0, r1
+}
+
+// LoadJobList provides a mock function with given fields:
+func (_m *ExecutorApi) LoadJobList() ([]*api.JobListStub, error) {
+	ret := _m.Called()
+
+	var r0 []*api.JobListStub
+	if rf, ok := ret.Get(0).(func() []*api.JobListStub); ok {
+		r0 = rf()
+	} else {
+		if ret.Get(0) != nil {
+			r0 = ret.Get(0).([]*api.JobListStub)
+		}
+	}
+
+	var r1 error
+	if rf, ok := ret.Get(1).(func() error); ok {
+		r1 = rf()
+	} else {
+		r1 = ret.Error(1)
+	}
+
+	return r0, r1
+}
+
+// LoadRunners provides a mock function with given fields: jobId
+func (_m *ExecutorApi) LoadRunners(jobId string) ([]string, error) {
+	ret := _m.Called(jobId)
+
+	var r0 []string
+	if rf, ok := ret.Get(0).(func(string) []string); ok {
+		r0 = rf(jobId)
+	} else {
+		if ret.Get(0) != nil {
+			r0 = ret.Get(0).([]string)
+		}
+	}
+
+	var r1 error
+	if rf, ok := ret.Get(1).(func(string) error); ok {
+		r1 = rf(jobId)
+	} else {
+		r1 = ret.Error(1)
+	}
+
+	return r0, r1
+}
+
+// SetJobScaling provides a mock function with given fields: jobId, count, reason
+func (_m *ExecutorApi) SetJobScaling(jobId string, count int, reason string) error {
+	ret := _m.Called(jobId, count, reason)
+
+	var r0 error
+	if rf, ok := ret.Get(0).(func(string, int, string) error); ok {
+		r0 = rf(jobId, count, reason)
+	} else {
+		r0 = ret.Error(0)
+	}
+
+	return r0
+}

nomad/nomad.go

@@ -0,0 +1,71 @@
+package nomad
+
+import (
+	nomadApi "github.com/hashicorp/nomad/api"
+	"net/url"
+)
+
+// ExecutorApi provides access to an container orchestration solution
+type ExecutorApi interface {
+	LoadJobList() (list []*nomadApi.JobListStub, err error)
+	GetJobScale(jobId string) (jobScale int, err error)
+	SetJobScaling(jobId string, count int, reason string) (err error)
+	LoadRunners(jobId string) (runnerIds []string, err error)
+}
+
+// ApiClient provides access to the Nomad functionality
+type ApiClient struct {
+	client *nomadApi.Client
+}
+
+// New creates a new api client.
+// One client is usually sufficient for the complete runtime of the API.
+func New(nomadURL *url.URL) (ExecutorApi, error) {
+	client := &ApiClient{}
+	err := client.init(nomadURL)
+	return client, err
+}
+
+// init prepares an apiClient to be able to communicate to a provided Nomad API.
+func (apiClient *ApiClient) init(nomadURL *url.URL) (err error) {
+	apiClient.client, err = nomadApi.NewClient(&nomadApi.Config{
+		Address:   nomadURL.String(),
+		TLSConfig: &nomadApi.TLSConfig{},
+	})
+	return err
+}
+
+// LoadJobList loads the list of jobs from the Nomad api.
+func (apiClient *ApiClient) LoadJobList() (list []*nomadApi.JobListStub, err error) {
+	list, _, err = apiClient.client.Jobs().List(nil)
+	return
+}
+
+// GetJobScale returns the scale of the passed job.
+func (apiClient *ApiClient) GetJobScale(jobId string) (jobScale int, err error) {
+	status, _, err := apiClient.client.Jobs().ScaleStatus(jobId, nil)
+	if err != nil {
+		return
+	}
+	// ToDo: Consider counting also the placed and desired allocations
+	jobScale = status.TaskGroups[jobId].Running
+	return
+}
+
+// SetJobScaling sets the scaling count of the passed job to Nomad.
+func (apiClient *ApiClient) SetJobScaling(jobId string, count int, reason string) (err error) {
+	_, _, err = apiClient.client.Jobs().Scale(jobId, jobId, &count, reason, false, nil, nil)
+	return
+}
+
+// LoadRunners loads the allocations of the specified job.
+func (apiClient *ApiClient) LoadRunners(jobId string) (runnerIds []string, err error) {
+	list, _, err := apiClient.client.Jobs().Allocations(jobId, true, nil)
+	if err != nil {
+		return nil, err
+	}
+	for _, stub := range list {
+		runnerIds = append(runnerIds, stub.ID)
+	}
+	return
+}

runner/runner.go

@@ -0,0 +1,71 @@
+package runner
+
+import (
+	"encoding/json"
+	"sync"
+)
+
+type Status string
+
+const (
+	StatusReady    Status = "ready"
+	StatusRunning  Status = "running"
+	StatusTimeout  Status = "timeout"
+	StatusFinished Status = "finished"
+)
+
+type Runner interface {
+	SetStatus(Status)
+	Status() Status
+	Id() string
+}
+
+// ExerciseRunner is an abstraction to communicate with Nomad allocations
+type ExerciseRunner struct {
+	sync.Mutex
+	id     string
+	status Status
+	ch     chan bool
+}
+
+// NewExerciseRunner creates a new exercise runner with the provided id
+// As default value the status is ready
+func NewExerciseRunner(id string) *ExerciseRunner {
+	return &ExerciseRunner{
+		id:     id,
+		status: StatusReady,
+		Mutex:  sync.Mutex{},
+		ch:     make(chan bool),
+	}
+}
+
+// MarshalJSON implements json.Marshaler interface
+// This exports also private attributes like the id
+func (r *ExerciseRunner) MarshalJSON() ([]byte, error) {
+	return json.Marshal(struct {
+		Id     string `json:"runnerId"`
+		Status Status `json:"status"`
+	}{
+		Id:     r.Id(),
+		Status: r.Status(),
+	})
+}
+
+// SetStatus sets the status thread-safe
+func (r *ExerciseRunner) SetStatus(status Status) {
+	r.Lock()
+	defer r.Unlock()
+	r.status = status
+}
+
+// Status returns the status thread-safe
+func (r *ExerciseRunner) Status() Status {
+	r.Lock()
+	defer r.Unlock()
+	return r.status
+}
+
+// Id returns the id of the runner
+func (r *ExerciseRunner) Id() string {
+	return r.id
+}

runner/runner_test.go

@@ -0,0 +1,32 @@
+package runner
+
+import (
+	"encoding/json"
+	"github.com/stretchr/testify/assert"
+	"testing"
+)
+
+func TestIdIsStored(t *testing.T) {
+	runner := NewExerciseRunner("42")
+	assert.Equal(t, "42", runner.Id())
+}
+
+func TestStatusIsStored(t *testing.T) {
+	runner := NewExerciseRunner("42")
+	for _, status := range []Status{StatusReady, StatusRunning, StatusTimeout, StatusFinished} {
+		runner.SetStatus(status)
+		assert.Equal(t, status, runner.Status(), "The status is returned as it is stored")
+	}
+}
+
+func TestDefaultStatus(t *testing.T) {
+	runner := NewExerciseRunner("42")
+	assert.Equal(t, StatusReady, runner.status)
+}
+
+func TestMarshalRunner(t *testing.T) {
+	runner := NewExerciseRunner("42")
+	marshal, err := json.Marshal(runner)
+	assert.NoError(t, err)
+	assert.Equal(t, "{\"runnerId\":\"42\",\"status\":\"ready\"}", string(marshal))
+}