youtubebeat/vendor/github.com/elastic/beats/journalbeat/cmd/instance/metrics.go

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2018-11-18 11:08:38 +01:00
// Licensed to Elasticsearch B.V. under one or more contributor
// license agreements. See the NOTICE file distributed with
// this work for additional information regarding copyright
// ownership. Elasticsearch B.V. licenses this file to you under
// the Apache License, Version 2.0 (the "License"); you may
// not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied. See the License for the
// specific language governing permissions and limitations
// under the License.
//+build linux,cgo
package instance
import (
"fmt"
"github.com/coreos/go-systemd/sdjournal"
"github.com/elastic/beats/libbeat/monitoring"
)
var (
metrics *monitoring.Registry
journals map[string]*sdjournal.Journal
)
// SetupJournalMetrics initializes and registers monitoring functions.
func SetupJournalMetrics() {
metrics = monitoring.Default.NewRegistry("journalbeat")
journals = make(map[string]*sdjournal.Journal)
monitoring.NewFunc(metrics, "journals", reportJournalSizes, monitoring.Report)
}
// AddJournalToMonitor adds a new journal which has to be monitored.
func AddJournalToMonitor(path string, journal *sdjournal.Journal) {
journals[path] = journal
}
// StopMonitoringJournal stops monitoring the journal under the path.
func StopMonitoringJournal(path string) {
delete(journals, path)
}
func reportJournalSizes(m monitoring.Mode, V monitoring.Visitor) {
i := 0
for path, journal := range journals {
s, err := journal.GetUsage()
if err != nil {
continue
}
ns := fmt.Sprintf("journal_%d", i)
monitoring.ReportNamespace(V, ns, func() {
monitoring.ReportString(V, "path", path)
monitoring.ReportInt(V, "size_in_bytes", int64(s))
})
i++
}
}