146 lines
3.9 KiB
Go
146 lines
3.9 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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"sync"
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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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// Exporter wraps all the ceph collectors and provides a single global
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// exporter to extracts metrics out of. It also ensures that the collection
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// is done in a thread-safe manner, the necessary requirement stated by
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// prometheus. It also implements a prometheus.Collector interface in order
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// to register it correctly.
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type Exporter struct {
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mu sync.Mutex
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Conn Conn
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Cluster string
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Config string
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RgwMode int
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Logger *logrus.Logger
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Version *Version
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}
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// NewExporter returns an initialized *Exporter
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// We can choose to enable a collector to extract stats out of by adding it to the list of collectors.
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func NewExporter(conn Conn, cluster string, config string, rgwMode int, logger *logrus.Logger) *Exporter {
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return &Exporter{
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Conn: conn,
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Cluster: cluster,
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Config: config,
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RgwMode: rgwMode,
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Logger: logger,
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}
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}
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func (exporter *Exporter) getCollectors() []prometheus.Collector {
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standardCollectors := []prometheus.Collector{
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NewClusterUsageCollector(exporter),
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NewPoolUsageCollector(exporter),
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NewPoolInfoCollector(exporter),
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NewClusterHealthCollector(exporter),
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NewMonitorCollector(exporter),
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NewOSDCollector(exporter),
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NewCrashesCollector(exporter),
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}
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switch exporter.RgwMode {
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case RGWModeForeground:
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standardCollectors = append(standardCollectors, NewRGWCollector(exporter, false))
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case RGWModeBackground:
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standardCollectors = append(standardCollectors, NewRGWCollector(exporter, true))
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case RGWModeDisabled:
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// nothing to do
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default:
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exporter.Logger.WithField("RgwMode", exporter.RgwMode).Warn("RGW collector disabled due to invalid mode")
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}
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return standardCollectors
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}
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func (exporter *Exporter) cephVersionCmd() []byte {
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cmd, err := json.Marshal(map[string]interface{}{
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"prefix": "version",
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"format": "json",
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})
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if err != nil {
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exporter.Logger.WithError(err).Panic("failed to marshal ceph version command")
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}
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return cmd
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}
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func (exporter *Exporter) setCephVersion() error {
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buf, _, err := exporter.Conn.MonCommand(exporter.cephVersionCmd())
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if err != nil {
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return err
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}
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cephVersion := &struct {
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Version string `json:"Version"`
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}{}
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err = json.Unmarshal(buf, cephVersion)
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if err != nil {
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return err
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}
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parsedVersion, err := ParseCephVersion(cephVersion.Version)
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if err != nil {
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exporter.Logger.Info("version " + cephVersion.Version)
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return err
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}
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exporter.Version = parsedVersion
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return nil
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}
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// Describe sends all the descriptors of the collectors included to
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// the provided channel.
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func (exporter *Exporter) Describe(ch chan<- *prometheus.Desc) {
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err := exporter.setCephVersion()
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if err != nil {
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exporter.Logger.WithError(err).Error("failed to set ceph Version")
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return
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}
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for _, cc := range exporter.getCollectors() {
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cc.Describe(ch)
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}
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}
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// Collect sends the collected metrics from each of the collectors to
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// prometheus. Collect could be called several times concurrently
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// and thus its run is protected by a single mutex.
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func (exporter *Exporter) Collect(ch chan<- prometheus.Metric) {
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exporter.mu.Lock()
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defer exporter.mu.Unlock()
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err := exporter.setCephVersion()
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if err != nil {
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exporter.Logger.WithError(err).Error("failed to set ceph Version")
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return
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}
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for _, cc := range exporter.getCollectors() {
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cc.Collect(ch)
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}
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}
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