chore(discoveryManager): expose Discoverer refresh function (#10531)

Signed-off-by: secustor <sebastian@poxhofer.at>

discovery/http/http.go

@@ -136,12 +136,12 @@ func NewDiscovery(conf *SDConfig, logger log.Logger, clientOpts []config.HTTPCli
 		logger,
 		"http",
 		time.Duration(conf.RefreshInterval),
-		d.refresh,
+		d.Refresh,
 	)
 	return d, nil
 }
 
-func (d *Discovery) refresh(ctx context.Context) ([]*targetgroup.Group, error) {
+func (d *Discovery) Refresh(ctx context.Context) ([]*targetgroup.Group, error) {
 	req, err := http.NewRequest("GET", d.url, nil)
 	if err != nil {
 		return nil, err

discovery/http/http_test.go

@@ -45,7 +45,7 @@ func TestHTTPValidRefresh(t *testing.T) {
 	require.NoError(t, err)
 
 	ctx := context.Background()
-	tgs, err := d.refresh(ctx)
+	tgs, err := d.Refresh(ctx)
 	require.NoError(t, err)
 
 	expectedTargets := []*targetgroup.Group{
@@ -83,7 +83,7 @@ func TestHTTPInvalidCode(t *testing.T) {
 	require.NoError(t, err)
 
 	ctx := context.Background()
-	_, err = d.refresh(ctx)
+	_, err = d.Refresh(ctx)
 	require.EqualError(t, err, "server returned HTTP status 400 Bad Request")
 	require.Equal(t, 1.0, getFailureCount())
 }
@@ -105,7 +105,7 @@ func TestHTTPInvalidFormat(t *testing.T) {
 	require.NoError(t, err)
 
 	ctx := context.Background()
-	_, err = d.refresh(ctx)
+	_, err = d.Refresh(ctx)
 	require.EqualError(t, err, `unsupported content type "text/plain; charset=utf-8"`)
 	require.Equal(t, 1.0, getFailureCount())
 }
@@ -423,7 +423,7 @@ func TestSourceDisappeared(t *testing.T) {
 		ctx := context.Background()
 		for i, res := range test.responses {
 			stubResponse = res
-			tgs, err := d.refresh(ctx)
+			tgs, err := d.Refresh(ctx)
 			require.NoError(t, err)
 			require.Equal(t, test.expectedTargets[i], tgs)
 		}

discovery/manager.go

@@ -75,8 +75,8 @@ type poolKey struct {
 	provider string
 }
 
-// provider holds a Discoverer instance, its configuration, cancel func and its subscribers.
+// Provider holds a Discoverer instance, its configuration, cancel func and its subscribers.
-type provider struct {
+type Provider struct {
 	name   string
 	d      Discoverer
 	config interface{}
@@ -92,11 +92,20 @@ type provider struct {
 	newSubs map[string]struct{}
 }
 
+// Discoverer return the Discoverer of the provider
+func (p *Provider) Discoverer() Discoverer {
+	return p.d
+}
+
 // IsStarted return true if Discoverer is started.
-func (p *provider) IsStarted() bool {
+func (p *Provider) IsStarted() bool {
 	return p.cancel != nil
 }
 
+func (p *Provider) Config() interface{} {
+	return p.config
+}
+
 // NewManager is the Discovery Manager constructor.
 func NewManager(ctx context.Context, logger log.Logger, options ...func(*Manager)) *Manager {
 	if logger == nil {
@@ -148,7 +157,7 @@ type Manager struct {
 	targetsMtx sync.Mutex
 
 	// providers keeps track of SD providers.
-	providers []*provider
+	providers []*Provider
 	// The sync channel sends the updates as a map where the key is the job value from the scrape config.
 	syncCh chan map[string][]*targetgroup.Group
 
@@ -163,6 +172,11 @@ type Manager struct {
 	lastProvider uint
 }
 
+// Providers returns the currently configured SD providers.
+func (m *Manager) Providers() []*Provider {
+	return m.providers
+}
+
 // Run starts the background processing.
 func (m *Manager) Run() error {
 	go m.sender()
@@ -194,7 +208,7 @@ func (m *Manager) ApplyConfig(cfg map[string]Configs) error {
 		wg sync.WaitGroup
 		// keep shows if we keep any providers after reload.
 		keep         bool
-		newProviders []*provider
+		newProviders []*Provider
 	)
 	for _, prov := range m.providers {
 		// Cancel obsolete providers.
@@ -260,7 +274,7 @@ func (m *Manager) ApplyConfig(cfg map[string]Configs) error {
 
 // StartCustomProvider is used for sdtool. Only use this if you know what you're doing.
 func (m *Manager) StartCustomProvider(ctx context.Context, name string, worker Discoverer) {
-	p := &provider{
+	p := &Provider{
 		name: name,
 		d:    worker,
 		subs: map[string]struct{}{
@@ -271,7 +285,7 @@ func (m *Manager) StartCustomProvider(ctx context.Context, name string, worker D
 	m.startProvider(ctx, p)
 }
 
-func (m *Manager) startProvider(ctx context.Context, p *provider) {
+func (m *Manager) startProvider(ctx context.Context, p *Provider) {
 	level.Debug(m.logger).Log("msg", "Starting provider", "provider", p.name, "subs", fmt.Sprintf("%v", p.subs))
 	ctx, cancel := context.WithCancel(ctx)
 	updates := make(chan []*targetgroup.Group)
@@ -283,7 +297,7 @@ func (m *Manager) startProvider(ctx context.Context, p *provider) {
 }
 
 // cleaner cleans resources associated with provider.
-func (m *Manager) cleaner(p *provider) {
+func (m *Manager) cleaner(p *Provider) {
 	m.targetsMtx.Lock()
 	p.mu.RLock()
 	for s := range p.subs {
@@ -296,7 +310,7 @@ func (m *Manager) cleaner(p *provider) {
 	}
 }
 
-func (m *Manager) updater(ctx context.Context, p *provider, updates chan []*targetgroup.Group) {
+func (m *Manager) updater(ctx context.Context, p *Provider, updates chan []*targetgroup.Group) {
 	// Ensure targets from this provider are cleaned up.
 	defer m.cleaner(p)
 	for {
@@ -422,7 +436,7 @@ func (m *Manager) registerProviders(cfgs Configs, setName string) int {
 			failed++
 			return
 		}
-		m.providers = append(m.providers, &provider{
+		m.providers = append(m.providers, &Provider{
 			name:   fmt.Sprintf("%s/%d", typ, m.lastProvider),
 			d:      d,
 			config: cfg,