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|
package internal
import (
"encoding/json"
"fmt"
"os"
"path/filepath"
"strings"
"time"
)
type jsonReport struct {
LastUpdated string `json:"lastUpdated"`
Subject string `json:"subject"`
Summary jsonSummary `json:"summary"`
Sections jsonSections `json:"sections"`
}
type jsonSummary struct {
Critical int `json:"critical"`
Warning int `json:"warning"`
Unknown int `json:"unknown"`
Stale int `json:"stale"`
Suppressed int `json:"suppressed"`
Ok int `json:"ok"`
}
type jsonSections struct {
StatusChanged []jsonCheck `json:"statusChanged"`
Unhandled []jsonCheck `json:"unhandled"`
Stale []jsonCheck `json:"stale"`
Suppressed []jsonCheck `json:"suppressed"`
Ok []jsonCheck `json:"ok"`
}
type jsonCheck struct {
Name string `json:"name"`
Status string `json:"status"`
PrevStatus string `json:"prevStatus,omitempty"`
Output string `json:"output"`
FederatedFrom string `json:"federatedFrom,omitempty"`
Epoch int64 `json:"epoch"`
LastCheckedAgeSeconds int64 `json:"lastCheckedAgeSeconds,omitempty"`
}
func persistJSONReport(state state, subject string, conf config) error {
htmlFile := conf.HTMLStatusFile
if htmlFile == "" {
return nil
}
jsonFile := jsonReportPath(htmlFile)
jsonDir := filepath.Dir(jsonFile)
if err := os.MkdirAll(jsonDir, 0o755); err != nil {
return fmt.Errorf("failed to create directory %s: %w", jsonDir, err)
}
tmpFile := jsonFile + ".tmp"
f, err := os.Create(tmpFile)
if err != nil {
return fmt.Errorf("failed to create temp file: %w", err)
}
defer f.Close()
report := state.jsonReport(subject, conf)
encoder := json.NewEncoder(f)
encoder.SetIndent("", " ")
if err := encoder.Encode(report); err != nil {
return fmt.Errorf("failed to write JSON: %w", err)
}
return os.Rename(tmpFile, jsonFile)
}
func jsonReportPath(htmlPath string) string {
ext := filepath.Ext(htmlPath)
if ext == "" {
return htmlPath + ".json"
}
return strings.TrimSuffix(htmlPath, ext) + ".json"
}
func (s state) jsonReport(subject string, conf config) jsonReport {
now := time.Now()
summary := jsonSummary{
Critical: s.countBy(conf, func(cs checkState) bool { return cs.Status == nagiosCritical }),
Warning: s.countBy(conf, func(cs checkState) bool { return cs.Status == nagiosWarning }),
Unknown: s.countBy(conf, func(cs checkState) bool { return cs.Status == nagiosUnknown }),
Stale: s.countStale(conf),
Suppressed: s.countSuppressed(conf),
Ok: s.countBy(conf, func(cs checkState) bool { return cs.Status == nagiosOk }),
}
sections := jsonSections{
StatusChanged: s.jsonReportChanged(now, conf),
Unhandled: s.jsonReportUnhandled(now, conf),
Stale: s.jsonReportStale(now, conf),
Suppressed: s.jsonReportSuppressed(conf),
Ok: s.jsonReportBy(now, false, false, conf, func(cs checkState) bool {
return cs.Status == nagiosOk
}),
}
return jsonReport{
LastUpdated: now.Format(time.RFC3339),
Subject: subject,
Summary: summary,
Sections: sections,
}
}
func (s state) jsonReportChanged(now time.Time, conf config) []jsonCheck {
var checks []jsonCheck
checks = append(checks, s.jsonReportBy(now, true, false, conf, func(cs checkState) bool {
return cs.Status == nagiosCritical && cs.changed()
})...)
checks = append(checks, s.jsonReportBy(now, true, false, conf, func(cs checkState) bool {
return cs.Status == nagiosWarning && cs.changed()
})...)
checks = append(checks, s.jsonReportBy(now, true, false, conf, func(cs checkState) bool {
return cs.Status == nagiosUnknown && cs.changed()
})...)
checks = append(checks, s.jsonReportBy(now, true, false, conf, func(cs checkState) bool {
return cs.Status == nagiosOk && cs.changed()
})...)
return checks
}
func (s state) jsonReportUnhandled(now time.Time, conf config) []jsonCheck {
var checks []jsonCheck
checks = append(checks, s.jsonReportBy(now, false, false, conf, func(cs checkState) bool {
return cs.Status == nagiosCritical
})...)
checks = append(checks, s.jsonReportBy(now, false, false, conf, func(cs checkState) bool {
return cs.Status == nagiosWarning
})...)
checks = append(checks, s.jsonReportBy(now, false, false, conf, func(cs checkState) bool {
return cs.Status == nagiosUnknown
})...)
return checks
}
func (s state) jsonReportStale(now time.Time, conf config) []jsonCheck {
return s.jsonReportBy(now, false, true, conf, func(cs checkState) bool {
return cs.Epoch < s.staleEpoch && cs.Status != nagiosOk
})
}
func (s state) jsonReportSuppressed(conf config) []jsonCheck {
var checks []jsonCheck
for name, cs := range s.checks {
if cs.Status == nagiosOk || !isCheckSuppressed(name, conf) {
continue
}
checks = append(checks, jsonCheck{
Name: name,
Status: nagiosCode(cs.Status).Str(),
Output: cs.Output,
FederatedFrom: cs.FederatedFrom,
Epoch: cs.Epoch,
})
}
return checks
}
func (s state) jsonReportBy(now time.Time, showStatusChange, isStaleReport bool, conf config,
filter func(cs checkState) bool,
) []jsonCheck {
var checks []jsonCheck
for name, cs := range s.checks {
if !filter(cs) {
continue
}
if !isStaleReport && cs.Epoch < s.staleEpoch {
continue
}
if cs.Status != nagiosOk && isCheckSuppressed(name, conf) {
continue
}
entry := jsonCheck{
Name: name,
Status: nagiosCode(cs.Status).Str(),
Output: cs.Output,
FederatedFrom: cs.FederatedFrom,
Epoch: cs.Epoch,
}
if showStatusChange && cs.changed() {
entry.PrevStatus = nagiosCode(cs.PrevStatus).Str()
}
if isStaleReport {
entry.LastCheckedAgeSeconds = int64(now.Sub(time.Unix(cs.Epoch, 0)).Seconds())
}
checks = append(checks, entry)
}
return checks
}
|
