126 lines
3.2 KiB
Go
126 lines
3.2 KiB
Go
// Copyright 2022 DigitalOcean
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package ceph
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import (
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"encoding/json"
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"fmt"
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"github.com/prometheus/client_golang/prometheus"
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"github.com/sirupsen/logrus"
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)
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var (
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statusNames = map[bool]string{true: "new", false: "archived"}
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)
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// CrashesCollector collects information on how many crash reports are currently open.
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// These reports are counted by daemon/client name, and by status (new or archived).
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// This is NOT the same as new_crash_reports, that only counts new reports in the past
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// two weeks as reported by 'ceph health'.
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type CrashesCollector struct {
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conn Conn
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logger *logrus.Logger
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version *Version
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crashReportsDesc *prometheus.Desc
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}
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// NewCrashesCollector creates a new CrashesCollector instance
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func NewCrashesCollector(exporter *Exporter) *CrashesCollector {
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labels := make(prometheus.Labels)
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labels["cluster"] = exporter.Cluster
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collector := &CrashesCollector{
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conn: exporter.Conn,
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logger: exporter.Logger,
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version: exporter.Version,
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crashReportsDesc: prometheus.NewDesc(
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fmt.Sprintf("%s_crash_reports", cephNamespace),
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"Count of crashes reports per daemon, according to `ceph crash ls`",
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[]string{"entity", "hostname", "status"},
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labels,
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),
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}
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return collector
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}
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type crashEntry struct {
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entity string
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hostname string
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isNew bool
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}
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type cephCrashLs struct {
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Entity string `json:"entity_name"`
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Hostname string `json:"utsname_hostname"`
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Archived string `json:"archived"`
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}
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// getCrashLs runs the 'ceph crash ls' command and process its results
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func (c *CrashesCollector) getCrashLs() (map[crashEntry]int, error) {
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crashes := make(map[crashEntry]int)
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cmd, err := json.Marshal(map[string]interface{}{
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"prefix": "crash ls",
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"format": "json",
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})
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if err != nil {
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return crashes, err
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}
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buf, _, err := c.conn.MonCommand(cmd)
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if err != nil {
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return crashes, err
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}
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var crashData []cephCrashLs
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if err = json.Unmarshal(buf, &crashData); err != nil {
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return crashes, err
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}
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for _, crash := range crashData {
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crashes[crashEntry{crash.Entity, crash.Hostname, len(crash.Archived) == 0}]++
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}
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return crashes, nil
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}
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// Describe provides the metrics descriptions to Prometheus
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func (c *CrashesCollector) Describe(ch chan<- *prometheus.Desc) {
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ch <- c.crashReportsDesc
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}
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// Collect sends all the collected metrics Prometheus.
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func (c *CrashesCollector) Collect(ch chan<- prometheus.Metric) {
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crashes, err := c.getCrashLs()
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if err != nil {
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c.logger.WithError(err).Error("failed to run 'ceph crash ls'")
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}
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for crash, count := range crashes {
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ch <- prometheus.MustNewConstMetric(
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c.crashReportsDesc,
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prometheus.GaugeValue,
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float64(count),
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crash.entity,
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crash.hostname,
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statusNames[crash.isNew],
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)
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}
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}
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