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template_data.go
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template_data.go
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package templates
import (
"context"
"encoding/json"
"net/url"
"path"
"sort"
"strings"
"time"
"github.com/go-kit/log"
"github.com/go-kit/log/level"
"github.com/prometheus/alertmanager/notify"
"github.com/prometheus/alertmanager/template"
"github.com/prometheus/alertmanager/types"
"github.com/prometheus/common/model"
"github.com/grafana/alerting/models"
)
type Template = template.Template
type KV = template.KV
type Data = template.Data
var FromGlobs = template.FromGlobs
type ExtendedAlert struct {
Status string `json:"status"`
Labels KV `json:"labels"`
Annotations KV `json:"annotations"`
StartsAt time.Time `json:"startsAt"`
EndsAt time.Time `json:"endsAt"`
GeneratorURL string `json:"generatorURL"`
Fingerprint string `json:"fingerprint"`
SilenceURL string `json:"silenceURL"`
DashboardURL string `json:"dashboardURL"`
PanelURL string `json:"panelURL"`
Values map[string]float64 `json:"values"`
ValueString string `json:"valueString"` // TODO: Remove in Grafana 10
ImageURL string `json:"imageURL,omitempty"`
EmbeddedImage string `json:"embeddedImage,omitempty"`
}
type ExtendedAlerts []ExtendedAlert
type ExtendedData struct {
Receiver string `json:"receiver"`
Status string `json:"status"`
Alerts ExtendedAlerts `json:"alerts"`
GroupLabels KV `json:"groupLabels"`
CommonLabels KV `json:"commonLabels"`
CommonAnnotations KV `json:"commonAnnotations"`
ExternalURL string `json:"externalURL"`
}
func removePrivateItems(kv template.KV) template.KV {
for key := range kv {
if strings.HasPrefix(key, "__") && strings.HasSuffix(key, "__") {
kv = kv.Remove([]string{key})
}
}
return kv
}
func extendAlert(alert template.Alert, externalURL string, logger log.Logger) *ExtendedAlert {
// remove "private" annotations & labels so they don't show up in the template
extended := &ExtendedAlert{
Status: alert.Status,
Labels: removePrivateItems(alert.Labels),
Annotations: removePrivateItems(alert.Annotations),
StartsAt: alert.StartsAt,
EndsAt: alert.EndsAt,
GeneratorURL: alert.GeneratorURL,
Fingerprint: alert.Fingerprint,
}
// fill in some grafana-specific urls
if len(externalURL) == 0 {
return extended
}
u, err := url.Parse(externalURL)
if err != nil {
level.Debug(logger).Log("msg", "failed to parse external URL while extending template data", "url", externalURL, "error", err.Error())
return extended
}
externalPath := u.Path
dashboardUID := alert.Annotations[models.DashboardUIDAnnotation]
if len(dashboardUID) > 0 {
u.Path = path.Join(externalPath, "/d/", dashboardUID)
extended.DashboardURL = u.String()
panelID := alert.Annotations[models.PanelIDAnnotation]
if len(panelID) > 0 {
u.RawQuery = "viewPanel=" + panelID
extended.PanelURL = u.String()
}
generatorURL, err := url.Parse(extended.GeneratorURL)
if err != nil {
level.Debug(logger).Log("msg", "failed to parse generator URL while extending template data", "url", extended.GeneratorURL, "error", err.Error())
return extended
}
dashboardURL, err := url.Parse(extended.DashboardURL)
if err != nil {
level.Debug(logger).Log("msg", "failed to parse dashboard URL while extending template data", "url", extended.DashboardURL, "error", err.Error())
return extended
}
orgID := alert.Annotations[models.OrgIDAnnotation]
if len(orgID) > 0 {
extended.DashboardURL = setOrgIDQueryParam(dashboardURL, orgID)
extended.PanelURL = setOrgIDQueryParam(u, orgID)
extended.GeneratorURL = setOrgIDQueryParam(generatorURL, orgID)
}
}
if alert.Annotations != nil {
if s, ok := alert.Annotations[models.ValuesAnnotation]; ok {
if err := json.Unmarshal([]byte(s), &extended.Values); err != nil {
level.Warn(logger).Log("msg", "failed to unmarshal values annotation", "error", err.Error())
}
}
// TODO: Remove in Grafana 10
extended.ValueString = alert.Annotations[models.ValueStringAnnotation]
}
matchers := make([]string, 0)
for key, value := range alert.Labels {
if !(strings.HasPrefix(key, "__") && strings.HasSuffix(key, "__")) {
matchers = append(matchers, key+"="+value)
}
}
sort.Strings(matchers)
u.Path = path.Join(externalPath, "/alerting/silence/new")
query := make(url.Values)
query.Add("alertmanager", "grafana")
for _, matcher := range matchers {
query.Add("matcher", matcher)
}
u.RawQuery = query.Encode()
extended.SilenceURL = u.String()
return extended
}
func setOrgIDQueryParam(url *url.URL, orgID string) string {
q := url.Query()
q.Set("orgId", orgID)
url.RawQuery = q.Encode()
return url.String()
}
func ExtendData(data *Data, logger log.Logger) *ExtendedData {
alerts := make([]ExtendedAlert, 0, len(data.Alerts))
for _, alert := range data.Alerts {
extendedAlert := extendAlert(alert, data.ExternalURL, logger)
alerts = append(alerts, *extendedAlert)
}
extended := &ExtendedData{
Receiver: data.Receiver,
Status: data.Status,
Alerts: alerts,
GroupLabels: data.GroupLabels,
CommonLabels: removePrivateItems(data.CommonLabels),
CommonAnnotations: removePrivateItems(data.CommonAnnotations),
ExternalURL: data.ExternalURL,
}
return extended
}
func TmplText(ctx context.Context, tmpl *Template, alerts []*types.Alert, l log.Logger, tmplErr *error) (func(string) string, *ExtendedData) {
promTmplData := notify.GetTemplateData(ctx, tmpl, alerts, l)
data := ExtendData(promTmplData, l)
return func(name string) (s string) {
if *tmplErr != nil {
return
}
s, *tmplErr = tmpl.ExecuteTextString(name, data)
return s
}, data
}
// Firing returns the subset of alerts that are firing.
func (as ExtendedAlerts) Firing() []ExtendedAlert {
res := []ExtendedAlert{}
for _, a := range as {
if a.Status == string(model.AlertFiring) {
res = append(res, a)
}
}
return res
}
// Resolved returns the subset of alerts that are resolved.
func (as ExtendedAlerts) Resolved() []ExtendedAlert {
res := []ExtendedAlert{}
for _, a := range as {
if a.Status == string(model.AlertResolved) {
res = append(res, a)
}
}
return res
}