agent: Refactor service and config

This commit moves the services and agent's configuration in their own
module to improve readability.

Signed-off-by: Cosmin Tupangiu <cosmin@redhat.com>

cmd/planner-agent/main.go

@@ -11,6 +11,7 @@ import (
 
 	"github.com/google/uuid"
 	"github.com/kubev2v/migration-planner/internal/agent"
+	"github.com/kubev2v/migration-planner/internal/agent/config"
 	"github.com/kubev2v/migration-planner/pkg/log"
 	"go.uber.org/zap"
 	"go.uber.org/zap/zapcore"
@@ -28,16 +29,16 @@ func main() {
 }
 
 type agentCmd struct {
-	config     *agent.Config
+	config     *config.Config
 	configFile string
 }
 
 func NewAgentCommand() *agentCmd {
 	a := &agentCmd{
-		config: agent.NewDefault(),
+		config: config.NewDefault(),
 	}
 
-	flag.StringVar(&a.configFile, "config", agent.DefaultConfigFile, "Path to the agent's configuration file.")
+	flag.StringVar(&a.configFile, "config", config.DefaultConfigFile, "Path to the agent's configuration file.")
 
 	flag.Usage = func() {
 		fmt.Fprintf(flag.CommandLine.Output(), "Usage of %s:\n", os.Args[0])

internal/agent/agent.go

@@ -14,14 +14,14 @@ import (
 	"github.com/google/uuid"
 	api "github.com/kubev2v/migration-planner/api/v1alpha1"
 	"github.com/kubev2v/migration-planner/internal/agent/client"
+	"github.com/kubev2v/migration-planner/internal/agent/config"
+	"github.com/kubev2v/migration-planner/internal/agent/service"
 	"github.com/lthibault/jitterbug"
 	"go.uber.org/zap"
 	utilruntime "k8s.io/apimachinery/pkg/util/runtime"
 )
 
 const (
-	// name of the file which stores the current inventory
-	InventoryFile    = "inventory.json"
 	defaultAgentPort = 3333
 )
 
@@ -31,7 +31,7 @@ const (
 var version string
 
 // New creates a new agent.
-func New(id uuid.UUID, config *Config) *Agent {
+func New(id uuid.UUID, config *config.Config) *Agent {
 	return &Agent{
 		config:           config,
 		healtCheckStopCh: make(chan chan any),
@@ -40,7 +40,7 @@ func New(id uuid.UUID, config *Config) *Agent {
 }
 
 type Agent struct {
-	config           *Config
+	config           *config.Config
 	server           *Server
 	healtCheckStopCh chan chan any
 	credUrl          string
@@ -93,8 +93,8 @@ func (a *Agent) Stop() {
 }
 
 func (a *Agent) start(ctx context.Context, plannerClient client.Planner) {
-	inventoryUpdater := NewInventoryUpdater(a.id, plannerClient)
-	statusUpdater := NewStatusUpdater(a.id, version, a.credUrl, a.config, plannerClient)
+	inventoryUpdater := service.NewInventoryUpdater(a.id, plannerClient)
+	statusUpdater := service.NewStatusUpdater(a.id, version, a.credUrl, a.config, plannerClient)
 
 	// start server
 	a.server = NewServer(defaultAgentPort, a.config.DataDir, a.config.WwwDir)
@@ -104,7 +104,7 @@ func (a *Agent) start(ctx context.Context, plannerClient client.Planner) {
 	credUrl := a.initializeCredentialUrl()
 
 	// start the health check
-	healthChecker, err := NewHealthChecker(
+	healthChecker, err := service.NewHealthChecker(
 		plannerClient,
 		a.config.DataDir,
 		time.Duration(a.config.HealthCheckInterval*int64(time.Second)),
@@ -116,8 +116,8 @@ func (a *Agent) start(ctx context.Context, plannerClient client.Planner) {
 	// TODO refactor health checker to call it from the main goroutine
 	healthChecker.Start(a.healtCheckStopCh)
 
-	collector := NewCollector(a.config.DataDir)
-	collector.collect(ctx)
+	collector := service.NewCollector(a.config.DataDir)
+	collector.Collect(ctx)
 
 	updateTicker := jitterbug.New(time.Duration(a.config.UpdateInterval.Duration), &jitterbug.Norm{Stdev: 30 * time.Millisecond, Mean: 0})
 
@@ -140,7 +140,7 @@ func (a *Agent) start(ctx context.Context, plannerClient client.Planner) {
 			status, statusInfo, inventory := statusUpdater.CalculateStatus()
 
 			//	check for health. Send requests only if we have connectivity
-			if healthChecker.State() == HealthCheckStateConsoleUnreachable {
+			if healthChecker.State() == service.HealthCheckStateConsoleUnreachable {
 				continue
 			}
 
@@ -190,7 +190,7 @@ func (a *Agent) initializeCredentialUrl() string {
 	return credUrl
 }
 
-func newPlannerClient(cfg *Config) (client.Planner, error) {
+func newPlannerClient(cfg *config.Config) (client.Planner, error) {
 	httpClient, err := client.NewFromConfig(&cfg.PlannerService.Config)
 	if err != nil {
 		return nil, err

internal/agent/agent_test.go

@@ -15,6 +15,7 @@ import (
 	agentapi "github.com/kubev2v/migration-planner/api/v1alpha1/agent"
 	"github.com/kubev2v/migration-planner/internal/agent"
 	"github.com/kubev2v/migration-planner/internal/agent/client"
+	"github.com/kubev2v/migration-planner/internal/agent/config"
 	"github.com/kubev2v/migration-planner/internal/util"
 	. "github.com/onsi/ginkgo/v2"
 	. "github.com/onsi/gomega"
@@ -64,8 +65,8 @@ var _ = Describe("Agent", func() {
 	Context("Agent", func() {
 		It("agents starts successfully -- status waiting-for-credentials", func() {
 			updateInterval, _ := time.ParseDuration("5s")
-			config := agent.Config{
-				PlannerService:      agent.PlannerService{Config: *client.NewDefault()},
+			config := config.Config{
+				PlannerService:      config.PlannerService{Config: *client.NewDefault()},
 				DataDir:             agentTmpFolder,
 				ConfigDir:           agentTmpFolder,
 				UpdateInterval:      util.Duration{Duration: updateInterval},

internal/agent/config.go → internal/agent/config/config.go

@@ -1,4 +1,4 @@
-package agent
+package config
 
 import (
 	"encoding/json"
@@ -14,6 +14,10 @@ import (
 )
 
 const (
+	// name of the file which stores the source credentials
+	CredentialsFile = "credentials.json"
+	// name of the file which stores the current inventory
+	InventoryFile = "inventory.json"
 	// DefaultUpdateInterval is the default interval between two status updates
 	DefaultUpdateInterval = time.Duration(60 * time.Second)
 	// DefaultConfigDir is the default directory where the device's configuration is stored
@@ -32,6 +36,13 @@ const (
 	DefaultHealthCheck = 10
 )
 
+type Credentials struct {
+	URL                  string `json:"url"`
+	Username             string `json:"username"`
+	Password             string `json:"password"`
+	IsDataSharingAllowed bool   `json:"isDataSharingAllowed"`
+}
+
 type Config struct {
 	// ConfigDir is the directory where the agent's configuration is stored
 	ConfigDir string `json:"config-dir"`

internal/agent/rest.go

@@ -13,20 +13,17 @@ import (
 	"github.com/go-chi/chi"
 	"github.com/go-chi/render"
 	liberr "github.com/konveyor/forklift-controller/pkg/lib/error"
+	"github.com/kubev2v/migration-planner/internal/agent/config"
 	"github.com/kubev2v/migration-planner/internal/agent/fileio"
+	"github.com/kubev2v/migration-planner/internal/agent/service"
 	"github.com/vmware/govmomi"
 	"github.com/vmware/govmomi/session"
 	"github.com/vmware/govmomi/vim25"
 	"github.com/vmware/govmomi/vim25/soap"
 	"go.uber.org/zap"
 )
 
-const (
-	// name of the file which stores the source credentials
-	CredentialsFile = "credentials.json"
-)
-
-func RegisterApi(router *chi.Mux, statusUpdater *StatusUpdater, dataDir string) {
+func RegisterApi(router *chi.Mux, statusUpdater *service.StatusUpdater, dataDir string) {
 	router.Get("/api/v1/version", func(w http.ResponseWriter, r *http.Request) {
 		_ = render.Render(w, r, VersionReply{Version: version})
 	})
@@ -56,15 +53,8 @@ func (v VersionReply) Render(w http.ResponseWriter, r *http.Request) error {
 	return nil
 }
 
-type Credentials struct {
-	URL                  string `json:"url"`
-	Username             string `json:"username"`
-	Password             string `json:"password"`
-	IsDataSharingAllowed bool   `json:"isDataSharingAllowed"`
-}
-
 func credentialHandler(dataDir string, w http.ResponseWriter, r *http.Request) {
-	credentials := &Credentials{}
+	credentials := &config.Credentials{}
 
 	err := json.NewDecoder(r.Body).Decode(credentials)
 	if err != nil {
@@ -84,7 +74,7 @@ func credentialHandler(dataDir string, w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
-	credPath := filepath.Join(dataDir, CredentialsFile)
+	credPath := filepath.Join(dataDir, config.CredentialsFile)
 	buf, _ := json.Marshal(credentials)
 	writer := fileio.NewWriter()
 
@@ -98,7 +88,7 @@ func credentialHandler(dataDir string, w http.ResponseWriter, r *http.Request) {
 	w.WriteHeader(http.StatusNoContent)
 }
 
-func parseUrl(credentials *Credentials) (*url.URL, error) {
+func parseUrl(credentials *config.Credentials) (*url.URL, error) {
 	u, err := url.ParseRequestURI(credentials.URL)
 	if err != nil {
 		return nil, err
@@ -111,7 +101,7 @@ func parseUrl(credentials *Credentials) (*url.URL, error) {
 	return u, nil
 }
 
-func testVmwareConnection(requestCtx context.Context, credentials *Credentials) (status int, err error) {
+func testVmwareConnection(requestCtx context.Context, credentials *config.Credentials) (status int, err error) {
 	u, err := parseUrl(credentials)
 	if err != nil {
 		return http.StatusUnprocessableEntity, liberr.Wrap(err)

internal/agent/server.go

@@ -8,6 +8,7 @@ import (
 
 	"github.com/go-chi/chi"
 	"github.com/go-chi/chi/middleware"
+	"github.com/kubev2v/migration-planner/internal/agent/service"
 	"go.uber.org/zap"
 )
 
@@ -32,7 +33,7 @@ func NewServer(port int, dataFolder, wwwFolder string) *Server {
 	}
 }
 
-func (s *Server) Start(statusUpdater *StatusUpdater) {
+func (s *Server) Start(statusUpdater *service.StatusUpdater) {
 	router := chi.NewRouter()
 	router.Use(middleware.RequestID)
 	router.Use(middleware.Logger)

internal/agent/collector.go → internal/agent/service/collector.go

@@ -1,4 +1,4 @@
-package agent
+package service
 
 import (
 	"bytes"
@@ -21,6 +21,7 @@ import (
 	web "github.com/konveyor/forklift-controller/pkg/controller/provider/web/vsphere"
 	libmodel "github.com/konveyor/forklift-controller/pkg/lib/inventory/model"
 	apiplanner "github.com/kubev2v/migration-planner/api/v1alpha1"
+	"github.com/kubev2v/migration-planner/internal/agent/config"
 	"github.com/kubev2v/migration-planner/internal/util"
 	"go.uber.org/zap"
 	core "k8s.io/api/core/v1"
@@ -38,7 +39,7 @@ func NewCollector(dataDir string) *Collector {
 	}
 }
 
-func (c *Collector) collect(ctx context.Context) {
+func (c *Collector) Collect(ctx context.Context) {
 	c.once.Do(func() {
 		go func() {
 			for {
@@ -55,7 +56,7 @@ func (c *Collector) collect(ctx context.Context) {
 }
 
 func (c *Collector) run() {
-	credentialsFilePath := filepath.Join(c.dataDir, CredentialsFile)
+	credentialsFilePath := filepath.Join(c.dataDir, config.CredentialsFile)
 	zap.S().Named("collector").Infof("Waiting for credentials")
 	waitForFile(credentialsFilePath)
 
@@ -65,7 +66,7 @@ func (c *Collector) run() {
 		return
 	}
 
-	var creds Credentials
+	var creds config.Credentials
 	if err := json.Unmarshal(credsData, &creds); err != nil {
 		zap.S().Named("collector").Errorf("Error parsing credentials JSON: %v\n", err)
 		return
@@ -148,7 +149,7 @@ func (c *Collector) run() {
 	fillInventoryObjectWithMoreData(vms, inv)
 
 	zap.S().Named("collector").Infof("Write the inventory to output file")
-	if err := createOuput(filepath.Join(c.dataDir, InventoryFile), inv); err != nil {
+	if err := createOuput(filepath.Join(c.dataDir, config.InventoryFile), inv); err != nil {
 		zap.S().Named("collector").Errorf("Fill the inventory object with more data: %s", err)
 		return
 	}
@@ -239,7 +240,7 @@ func createBasicInventoryObj(vCenterID string, vms *[]vspheremodel.VM, collector
 	}
 }
 
-func getProvider(creds Credentials) *api.Provider {
+func getProvider(creds config.Credentials) *api.Provider {
 	vsphereType := api.VSphere
 	return &api.Provider{
 		Spec: api.ProviderSpec{
@@ -249,7 +250,7 @@ func getProvider(creds Credentials) *api.Provider {
 	}
 }
 
-func getSecret(creds Credentials) *core.Secret {
+func getSecret(creds config.Credentials) *core.Secret {
 	return &core.Secret{
 		ObjectMeta: meta.ObjectMeta{
 			Name:      "vsphere-secret",

internal/agent/health.go → internal/agent/service/health.go

@@ -1,4 +1,4 @@
-package agent
+package service
 
 import (
 	"context"

internal/agent/health_test.go → internal/agent/service/health_test.go

@@ -1,4 +1,4 @@
-package agent
+package service
 
 import (
 	"bytes"

internal/agent/inventory.go → internal/agent/service/inventory.go

@@ -1,4 +1,4 @@
-package agent
+package service
 
 import (
 	"bytes"

internal/agent/inventory_test.go → internal/agent/service/inventory_test.go

@@ -1,13 +1,13 @@
-package agent_test
+package service_test
 
 import (
 	"context"
 
 	"github.com/google/uuid"
 	api "github.com/kubev2v/migration-planner/api/v1alpha1"
 	v1alpha1 "github.com/kubev2v/migration-planner/api/v1alpha1/agent"
-	"github.com/kubev2v/migration-planner/internal/agent"
 	"github.com/kubev2v/migration-planner/internal/agent/client"
+	"github.com/kubev2v/migration-planner/internal/agent/service"
 	. "github.com/onsi/ginkgo/v2"
 	. "github.com/onsi/gomega"
 )
@@ -38,7 +38,7 @@ var _ = Describe("Inventory", func() {
 				Vms:     api.VMs{Total: 2},
 				Vcenter: api.VCenter{Id: sourceID.String()},
 			}
-			inventoryUpdater := agent.NewInventoryUpdater(agentID, &client)
+			inventoryUpdater := service.NewInventoryUpdater(agentID, &client)
 			inventoryUpdater.UpdateServiceWithInventory(context.TODO(), inventory)
 		})
 	})

internal/agent/status.go → internal/agent/service/status.go

@@ -1,4 +1,4 @@
-package agent
+package service
 
 import (
 	"context"
@@ -11,6 +11,7 @@ import (
 	api "github.com/kubev2v/migration-planner/api/v1alpha1"
 	agentapi "github.com/kubev2v/migration-planner/api/v1alpha1/agent"
 	"github.com/kubev2v/migration-planner/internal/agent/client"
+	"github.com/kubev2v/migration-planner/internal/agent/config"
 	"github.com/kubev2v/migration-planner/internal/agent/fileio"
 )
 
@@ -21,12 +22,12 @@ const (
 type StatusUpdater struct {
 	agentID uuid.UUID
 	version string
-	config  *Config
+	config  *config.Config
 	client  client.Planner
 	credUrl string
 }
 
-func NewStatusUpdater(agentID uuid.UUID, version, credUrl string, config *Config, client client.Planner) *StatusUpdater {
+func NewStatusUpdater(agentID uuid.UUID, version, credUrl string, config *config.Config, client client.Planner) *StatusUpdater {
 	return &StatusUpdater{
 		client:  client,
 		config:  config,
@@ -52,8 +53,8 @@ func (s *StatusUpdater) UpdateStatus(ctx context.Context, status api.AgentStatus
 }
 
 func (s *StatusUpdater) CalculateStatus() (api.AgentStatus, string, *api.Inventory) {
-	inventoryFilePath := filepath.Join(s.config.DataDir, InventoryFile)
-	credentialsFilePath := filepath.Join(s.config.DataDir, CredentialsFile)
+	inventoryFilePath := filepath.Join(s.config.DataDir, config.InventoryFile)
+	credentialsFilePath := filepath.Join(s.config.DataDir, config.CredentialsFile)
 	reader := fileio.NewReader()
 
 	err := reader.CheckPathExists(credentialsFilePath)