// Append implements storage.SampleAppender. Always returns nil.
func (s *ReloadableStorage) Append(smpl *model.Sample) error {
s.mtx.RLock()
defer s.mtx.RUnlock()
if s.queue == nil {
return nil
}
var snew model.Sample
snew = *smpl
snew.Metric = smpl.Metric.Clone()
for ln, lv := range s.externalLabels {
if _, ok := smpl.Metric[ln]; !ok {
snew.Metric[ln] = lv
}
}
snew.Metric = model.Metric(
relabel.Process(model.LabelSet(snew.Metric), s.conf.WriteRelabelConfigs...))
if snew.Metric == nil {
return nil
}
s.queue.Append(&snew)
return nil
}
// alertmanagersFromGroup extracts a list of alertmanagers from a target group and an associcated
// AlertmanagerConfig.
func alertmanagerFromGroup(tg *config.TargetGroup, cfg *config.AlertmanagerConfig) ([]alertmanager, error) {
var res []alertmanager
for _, lset := range tg.Targets {
// Set configured scheme as the initial scheme label for overwrite.
lset[model.SchemeLabel] = model.LabelValue(cfg.Scheme)
lset[pathLabel] = model.LabelValue(postPath(cfg.PathPrefix))
// Combine target labels with target group labels.
for ln, lv := range tg.Labels {
if _, ok := lset[ln]; !ok {
lset[ln] = lv
}
}
lset := relabel.Process(lset, cfg.RelabelConfigs...)
if lset == nil {
continue
}
// addPort checks whether we should add a default port to the address.
// If the address is not valid, we don't append a port either.
addPort := func(s string) bool {
// If we can split, a port exists and we don't have to add one.
if _, _, err := net.SplitHostPort(s); err == nil {
return false
}
// If adding a port makes it valid, the previous error
// was not due to an invalid address and we can append a port.
_, _, err := net.SplitHostPort(s + ":1234")
return err == nil
}
// If it's an address with no trailing port, infer it based on the used scheme.
if addr := string(lset[model.AddressLabel]); addPort(addr) {
// Addresses reaching this point are already wrapped in [] if necessary.
switch lset[model.SchemeLabel] {
case "http", "":
addr = addr + ":80"
case "https":
addr = addr + ":443"
default:
return nil, fmt.Errorf("invalid scheme: %q", cfg.Scheme)
}
lset[model.AddressLabel] = model.LabelValue(addr)
}
if err := config.CheckTargetAddress(lset[model.AddressLabel]); err != nil {
return nil, err
}
// Meta labels are deleted after relabelling. Other internal labels propagate to
// the target which decides whether they will be part of their label set.
for ln := range lset {
if strings.HasPrefix(string(ln), model.MetaLabelPrefix) {
delete(lset, ln)
}
}
res = append(res, alertmanagerLabels(lset))
}
return res, nil
}
// Append implements storage.SampleAppender. Always returns nil.
func (s *Storage) Append(smpl *model.Sample) error {
s.mtx.RLock()
var snew model.Sample
snew = *smpl
snew.Metric = smpl.Metric.Clone()
for ln, lv := range s.externalLabels {
if _, ok := smpl.Metric[ln]; !ok {
snew.Metric[ln] = lv
}
}
snew.Metric = model.Metric(
relabel.Process(model.LabelSet(snew.Metric), s.relabelConfigs...))
s.mtx.RUnlock()
if snew.Metric == nil {
return nil
}
for _, q := range s.queues {
q.Append(&snew)
}
return nil
}
func (n *Notifier) relabelAlerts(alerts []*model.Alert) []*model.Alert {
var relabeledAlerts []*model.Alert
for _, alert := range alerts {
labels := relabel.Process(alert.Labels, n.opts.RelabelConfigs...)
if labels != nil {
alert.Labels = labels
relabeledAlerts = append(relabeledAlerts, alert)
}
}
return relabeledAlerts
}
func (app relabelAppender) Append(s *model.Sample) error {
labels := relabel.Process(model.LabelSet(s.Metric), app.relabelings...)
// Check if the timeseries was dropped.
if labels == nil {
return nil
}
s.Metric = model.Metric(labels)
return app.SampleAppender.Append(s)
}
// populateLabels builds a label set from the given label set and scrape configuration.
// It returns a label set before relabeling was applied as the second return value.
// Returns a nil label set if the target is dropped during relabeling.
func populateLabels(lset model.LabelSet, cfg *config.ScrapeConfig) (res, orig model.LabelSet, err error) {
if _, ok := lset[model.AddressLabel]; !ok {
return nil, nil, fmt.Errorf("no address")
}
// Copy labels into the labelset for the target if they are not
// set already. Apply the labelsets in order of decreasing precedence.
scrapeLabels := model.LabelSet{
model.SchemeLabel: model.LabelValue(cfg.Scheme),
model.MetricsPathLabel: model.LabelValue(cfg.MetricsPath),
model.JobLabel: model.LabelValue(cfg.JobName),
}
for ln, lv := range scrapeLabels {
if _, ok := lset[ln]; !ok {
lset[ln] = lv
}
}
// Encode scrape query parameters as labels.
for k, v := range cfg.Params {
if len(v) > 0 {
lset[model.LabelName(model.ParamLabelPrefix+k)] = model.LabelValue(v[0])
}
}
preRelabelLabels := lset
lset = relabel.Process(lset, cfg.RelabelConfigs...)
// Check if the target was dropped.
if lset == nil {
return nil, nil, nil
}
// addPort checks whether we should add a default port to the address.
// If the address is not valid, we don't append a port either.
addPort := func(s string) bool {
// If we can split, a port exists and we don't have to add one.
if _, _, err := net.SplitHostPort(s); err == nil {
return false
}
// If adding a port makes it valid, the previous error
// was not due to an invalid address and we can append a port.
_, _, err := net.SplitHostPort(s + ":1234")
return err == nil
}
// If it's an address with no trailing port, infer it based on the used scheme.
if addr := string(lset[model.AddressLabel]); addPort(addr) {
// Addresses reaching this point are already wrapped in [] if necessary.
switch lset[model.SchemeLabel] {
case "http", "":
addr = addr + ":80"
case "https":
addr = addr + ":443"
default:
return nil, nil, fmt.Errorf("invalid scheme: %q", cfg.Scheme)
}
lset[model.AddressLabel] = model.LabelValue(addr)
}
if err := config.CheckTargetAddress(lset[model.AddressLabel]); err != nil {
return nil, nil, err
}
// Meta labels are deleted after relabelling. Other internal labels propagate to
// the target which decides whether they will be part of their label set.
for ln := range lset {
if strings.HasPrefix(string(ln), model.MetaLabelPrefix) {
delete(lset, ln)
}
}
// Default the instance label to the target address.
if _, ok := lset[model.InstanceLabel]; !ok {
lset[model.InstanceLabel] = lset[model.AddressLabel]
}
return lset, preRelabelLabels, nil
}