config: rename AlertingConfig, resolve file paths

cmd/prometheus/main.go

@@ -268,7 +268,7 @@ func reloadConfig(filename string, rls ...Reloadable) (err error) {
 		if err != nil {
 			return err
 		}
-		acfg := &config.AlertmanagersConfig{
+		acfg := &config.AlertmanagerConfig{
 			Scheme:     u.Scheme,
 			PathPrefix: u.Path,
 			Timeout:    cfg.notifierTimeout,
@@ -284,7 +284,7 @@ func reloadConfig(filename string, rls ...Reloadable) (err error) {
 				},
 			},
 		}
-		conf.AlertingConfig.AlertmanagersConfigs = append(conf.AlertingConfig.AlertmanagersConfigs, acfg)
+		conf.AlertingConfig.AlertmanagerConfigs = append(conf.AlertingConfig.AlertmanagerConfigs, acfg)
 	}
 
 	failed := false

config/config.go

@@ -88,7 +88,7 @@ var (
 	}
 
 	// DefaultAlertmanagersConfig is the default alertmanager configuration.
-	DefaultAlertmanagersConfig = AlertmanagersConfig{
+	DefaultAlertmanagersConfig = AlertmanagerConfig{
 		Scheme:  "http",
 		Timeout: 10 * time.Second,
 	}
@@ -220,27 +220,33 @@ func resolveFilepaths(baseDir string, cfg *Config) {
 		cfg.RuleFiles[i] = join(rf)
 	}
 
-	for _, cfg := range cfg.ScrapeConfigs {
-		scfg := &cfg.HTTPClientConfig
-
+	clientPaths := func(scfg *HTTPClientConfig) {
 		scfg.BearerTokenFile = join(scfg.BearerTokenFile)
 		scfg.TLSConfig.CAFile = join(scfg.TLSConfig.CAFile)
 		scfg.TLSConfig.CertFile = join(scfg.TLSConfig.CertFile)
 		scfg.TLSConfig.KeyFile = join(scfg.TLSConfig.KeyFile)
-
-		for _, kcfg := range cfg.ServiceDiscoveryConfig.KubernetesSDConfigs {
+	}
+	sdPaths := func(cfg *ServiceDiscoveryConfig) {
+		for _, kcfg := range cfg.KubernetesSDConfigs {
 			kcfg.BearerTokenFile = join(kcfg.BearerTokenFile)
 			kcfg.TLSConfig.CAFile = join(kcfg.TLSConfig.CAFile)
 			kcfg.TLSConfig.CertFile = join(kcfg.TLSConfig.CertFile)
 			kcfg.TLSConfig.KeyFile = join(kcfg.TLSConfig.KeyFile)
 		}
-
-		for _, mcfg := range cfg.ServiceDiscoveryConfig.MarathonSDConfigs {
+		for _, mcfg := range cfg.MarathonSDConfigs {
 			mcfg.TLSConfig.CAFile = join(mcfg.TLSConfig.CAFile)
 			mcfg.TLSConfig.CertFile = join(mcfg.TLSConfig.CertFile)
 			mcfg.TLSConfig.KeyFile = join(mcfg.TLSConfig.KeyFile)
 		}
+	}
 
+	for _, cfg := range cfg.ScrapeConfigs {
+		clientPaths(&cfg.HTTPClientConfig)
+		sdPaths(&cfg.ServiceDiscoveryConfig)
+	}
+	for _, cfg := range cfg.AlertingConfig.AlertmanagerConfigs {
+		clientPaths(&cfg.HTTPClientConfig)
+		sdPaths(&cfg.ServiceDiscoveryConfig)
 	}
 }
 
@@ -442,7 +448,7 @@ func (c *ServiceDiscoveryConfig) UnmarshalYAML(unmarshal func(interface{}) error
 	if err := unmarshal((*plain)(c)); err != nil {
 		return err
 	}
-	if err := checkOverflow(c.XXX, "TLS config"); err != nil {
+	if err := checkOverflow(c.XXX, "service discovery config"); err != nil {
 		return err
 	}
 	return nil
@@ -465,6 +471,16 @@ type HTTPClientConfig struct {
 	XXX map[string]interface{} `yaml:",inline"`
 }
 
+func (c *HTTPClientConfig) validate() error {
+	if len(c.BearerToken) > 0 && len(c.BearerTokenFile) > 0 {
+		return fmt.Errorf("at most one of bearer_token & bearer_token_file must be configured")
+	}
+	if c.BasicAuth != nil && (len(c.BearerToken) > 0 || len(c.BearerTokenFile) > 0) {
+		return fmt.Errorf("at most one of basic_auth, bearer_token & bearer_token_file must be configured")
+	}
+	return nil
+}
+
 // ScrapeConfig configures a scraping unit for Prometheus.
 type ScrapeConfig struct {
 	// The job name to which the job label is set by default.
@@ -511,14 +527,12 @@ func (c *ScrapeConfig) UnmarshalYAML(unmarshal func(interface{}) error) error {
 	if len(c.JobName) == 0 {
 		return fmt.Errorf("job_name is empty")
 	}
+
 	// The UnmarshalYAML method of HTTPClientConfig is not being called because it's not a pointer.
 	// We cannot make it a pointer as the parser panics for inlined pointer structs.
 	// Thus we just do its validation here.
-	if len(c.HTTPClientConfig.BearerToken) > 0 && len(c.HTTPClientConfig.BearerTokenFile) > 0 {
-		return fmt.Errorf("at most one of bearer_token & bearer_token_file must be configured")
-	}
-	if c.HTTPClientConfig.BasicAuth != nil && (len(c.HTTPClientConfig.BearerToken) > 0 || len(c.HTTPClientConfig.BearerTokenFile) > 0) {
-		return fmt.Errorf("at most one of basic_auth, bearer_token & bearer_token_file must be configured")
+	if err := c.HTTPClientConfig.validate(); err != nil {
+		return err
 	}
 
 	// Check for users putting URLs in target groups.
@@ -537,7 +551,7 @@ func (c *ScrapeConfig) UnmarshalYAML(unmarshal func(interface{}) error) error {
 // AlertingConfig configures alerting and alertmanager related configs
 type AlertingConfig struct {
 	AlertRelabelConfigs []*RelabelConfig      `yaml:"alert_relabel_configs,omitempty"`
-	AlertmanagersConfigs []*AlertmanagersConfig `yaml:"alertmanagers,omitempty"`
+	AlertmanagerConfigs []*AlertmanagerConfig `yaml:"alertmanagers,omitempty"`
 
 	// Catches all undefined fields and must be empty after parsing.
 	XXX map[string]interface{} `yaml:",inline"`
@@ -559,7 +573,7 @@ func (c *AlertingConfig) UnmarshalYAML(unmarshal func(interface{}) error) error
 }
 
 // AlertmanagersConfig configures how Alertmanagers can be discovered and communicated with.
-type AlertmanagersConfig struct {
+type AlertmanagerConfig struct {
 	// We cannot do proper Go type embedding below as the parser will then parse
 	// values arbitrarily into the overflow maps of further-down types.
 
@@ -581,23 +595,21 @@ type AlertmanagersConfig struct {
 }
 
 // UnmarshalYAML implements the yaml.Unmarshaler interface.
-func (c *AlertmanagersConfig) UnmarshalYAML(unmarshal func(interface{}) error) error {
+func (c *AlertmanagerConfig) UnmarshalYAML(unmarshal func(interface{}) error) error {
 	*c = DefaultAlertmanagersConfig
-	type plain AlertmanagersConfig
+	type plain AlertmanagerConfig
 	if err := unmarshal((*plain)(c)); err != nil {
 		return err
 	}
 	if err := checkOverflow(c.XXX, "alertmanager config"); err != nil {
 		return err
 	}
+
 	// The UnmarshalYAML method of HTTPClientConfig is not being called because it's not a pointer.
 	// We cannot make it a pointer as the parser panics for inlined pointer structs.
 	// Thus we just do its validation here.
-	if len(c.HTTPClientConfig.BearerToken) > 0 && len(c.HTTPClientConfig.BearerTokenFile) > 0 {
-		return fmt.Errorf("at most one of bearer_token & bearer_token_file must be configured")
-	}
-	if c.HTTPClientConfig.BasicAuth != nil && (len(c.HTTPClientConfig.BearerToken) > 0 || len(c.HTTPClientConfig.BearerTokenFile) > 0) {
-		return fmt.Errorf("at most one of basic_auth, bearer_token & bearer_token_file must be configured")
+	if err := c.HTTPClientConfig.validate(); err != nil {
+		return err
 	}
 
 	// Check for users putting URLs in target groups.

config/config_test.go

@@ -403,7 +403,7 @@ var expectedConf = &Config{
 		},
 	},
 	AlertingConfig: AlertingConfig{
-		AlertmanagersConfigs: []*AlertmanagersConfig{
+		AlertmanagerConfigs: []*AlertmanagerConfig{
 			{
 				Scheme:  "https",
 				Timeout: 10 * time.Second,

notifier/notifier.go

@@ -149,7 +149,7 @@ func (n *Notifier) ApplyConfig(conf *config.Config) error {
 	amSets := []*alertmanagerSet{}
 	ctx, cancel := context.WithCancel(n.ctx)
 
-	for _, cfg := range conf.AlertingConfig.AlertmanagersConfigs {
+	for _, cfg := range conf.AlertingConfig.AlertmanagerConfigs {
 		ams, err := newAlertmanagerSet(cfg)
 		if err != nil {
 			return err
@@ -300,8 +300,8 @@ func (n *Notifier) Alertmanagers() []string {
 	return res
 }
 
-// sendAll sends the alerts to all configured Alertmanagers at concurrently.
-// It returns the number of sends that have failed and true if all failed.
+// sendAll sends the alerts to all configured Alertmanagers concurrently.
+// It returns true if the alerts could be sent successfully to at least on Alertmanager.
 func (n *Notifier) sendAll(alerts ...*model.Alert) bool {
 	begin := time.Now()
 
@@ -380,8 +380,7 @@ func (n *Notifier) Collect(ch chan<- prometheus.Metric) {
 	ch <- n.queueCapacity
 }
 
-// alertmanager holds all necessary information to send alerts
-// to an Alertmanager endpoint.
+// alertmanager holds Alertmanager endpoint information.
 type alertmanager struct {
 	plainURL string // test injection hook
 	labels   model.LabelSet
@@ -419,14 +418,14 @@ func (a alertmanager) send(ctx context.Context, c *http.Client, b []byte) error
 // discovery definitions that have a common configuration on how alerts should be sent.
 type alertmanagerSet struct {
 	ts     *discovery.TargetSet
-	cfg    *config.AlertmanagersConfig
+	cfg    *config.AlertmanagerConfig
 	client *http.Client
 
 	mtx sync.RWMutex
 	ams []alertmanager
 }
 
-func newAlertmanagerSet(cfg *config.AlertmanagersConfig) (*alertmanagerSet, error) {
+func newAlertmanagerSet(cfg *config.AlertmanagerConfig) (*alertmanagerSet, error) {
 	client, err := retrieval.NewHTTPClient(cfg.HTTPClientConfig)
 	if err != nil {
 		return nil, err
@@ -477,7 +476,7 @@ func postPath(pre string) string {
 
 // alertmanagersFromGroup extracts a list of alertmanagers from a target group and an associcated
 // AlertmanagerConfig.
-func alertmanagerFromGroup(tg *config.TargetGroup, cfg *config.AlertmanagersConfig) ([]alertmanager, error) {
+func alertmanagerFromGroup(tg *config.TargetGroup, cfg *config.AlertmanagerConfig) ([]alertmanager, error) {
 	var res []alertmanager
 
 	for _, lset := range tg.Targets {

notifier/notifier_test.go

@@ -153,7 +153,7 @@ func TestHandlerSendAll(t *testing.T) {
 			{plainURL: server1.URL},
 			{plainURL: server2.URL},
 		},
-		cfg: &config.AlertmanagersConfig{
+		cfg: &config.AlertmanagerConfig{
 			Timeout: time.Second,
 		},
 	})
@@ -314,7 +314,7 @@ func TestHandlerQueueing(t *testing.T) {
 		ams: []alertmanager{
 			{plainURL: server.URL},
 		},
-		cfg: &config.AlertmanagersConfig{
+		cfg: &config.AlertmanagerConfig{
 			Timeout: time.Second,
 		},
 	})