|
| 1 | +package collector |
| 2 | + |
| 3 | +import ( |
| 4 | + "encoding/json" |
| 5 | + "fmt" |
| 6 | + "net/http" |
| 7 | + "net/url" |
| 8 | + "path" |
| 9 | + |
| 10 | + "github.com/go-kit/kit/log" |
| 11 | + "github.com/go-kit/kit/log/level" |
| 12 | + "github.com/prometheus/client_golang/prometheus" |
| 13 | +) |
| 14 | + |
| 15 | +// IndicesSettings information struct |
| 16 | +type IndicesSettings struct { |
| 17 | + logger log.Logger |
| 18 | + client *http.Client |
| 19 | + url *url.URL |
| 20 | + |
| 21 | + up prometheus.Gauge |
| 22 | + readOnlyIndices prometheus.Gauge |
| 23 | + totalScrapes, jsonParseFailures prometheus.Counter |
| 24 | +} |
| 25 | + |
| 26 | +// NewIndicesSettings defines Indices Settings Prometheus metrics |
| 27 | +func NewIndicesSettings(logger log.Logger, client *http.Client, url *url.URL) *IndicesSettings { |
| 28 | + return &IndicesSettings{ |
| 29 | + logger: logger, |
| 30 | + client: client, |
| 31 | + url: url, |
| 32 | + |
| 33 | + up: prometheus.NewGauge(prometheus.GaugeOpts{ |
| 34 | + Name: prometheus.BuildFQName(namespace, "indices_settings_stats", "up"), |
| 35 | + Help: "Was the last scrape of the ElasticSearch Indices Settings endpoint successful.", |
| 36 | + }), |
| 37 | + totalScrapes: prometheus.NewCounter(prometheus.CounterOpts{ |
| 38 | + Name: prometheus.BuildFQName(namespace, "indices_settings_stats", "total_scrapes"), |
| 39 | + Help: "Current total ElasticSearch Indices Settings scrapes.", |
| 40 | + }), |
| 41 | + readOnlyIndices: prometheus.NewGauge(prometheus.GaugeOpts{ |
| 42 | + Name: prometheus.BuildFQName(namespace, "indices_settings_stats", "read_only_indices"), |
| 43 | + Help: "Current number of read only indices within cluster", |
| 44 | + }), |
| 45 | + jsonParseFailures: prometheus.NewCounter(prometheus.CounterOpts{ |
| 46 | + Name: prometheus.BuildFQName(namespace, "indices_settings_stats", "json_parse_failures"), |
| 47 | + Help: "Number of errors while parsing JSON.", |
| 48 | + }), |
| 49 | + } |
| 50 | +} |
| 51 | + |
| 52 | +// Describe add Snapshots metrics descriptions |
| 53 | +func (cs *IndicesSettings) Describe(ch chan<- *prometheus.Desc) { |
| 54 | + ch <- cs.up.Desc() |
| 55 | + ch <- cs.totalScrapes.Desc() |
| 56 | + ch <- cs.readOnlyIndices.Desc() |
| 57 | + ch <- cs.jsonParseFailures.Desc() |
| 58 | +} |
| 59 | + |
| 60 | +func (cs *IndicesSettings) getAndParseURL(u *url.URL, data interface{}) error { |
| 61 | + res, err := cs.client.Get(u.String()) |
| 62 | + if err != nil { |
| 63 | + return fmt.Errorf("failed to get from %s://%s:%s%s: %s", |
| 64 | + u.Scheme, u.Hostname(), u.Port(), u.Path, err) |
| 65 | + } |
| 66 | + |
| 67 | + defer func() { |
| 68 | + err = res.Body.Close() |
| 69 | + if err != nil { |
| 70 | + _ = level.Warn(cs.logger).Log( |
| 71 | + "msg", "failed to close http.Client", |
| 72 | + "err", err, |
| 73 | + ) |
| 74 | + } |
| 75 | + }() |
| 76 | + |
| 77 | + if res.StatusCode != http.StatusOK { |
| 78 | + return fmt.Errorf("HTTP Request failed with code %d", res.StatusCode) |
| 79 | + } |
| 80 | + |
| 81 | + if err := json.NewDecoder(res.Body).Decode(data); err != nil { |
| 82 | + cs.jsonParseFailures.Inc() |
| 83 | + return err |
| 84 | + } |
| 85 | + return nil |
| 86 | +} |
| 87 | + |
| 88 | +func (cs *IndicesSettings) fetchAndDecodeIndicesSettings() (IndicesSettingsResponse, error) { |
| 89 | + |
| 90 | + u := *cs.url |
| 91 | + u.Path = path.Join(u.Path, "/_all/_settings") |
| 92 | + var asr IndicesSettingsResponse |
| 93 | + err := cs.getAndParseURL(&u, &asr) |
| 94 | + if err != nil { |
| 95 | + return asr, err |
| 96 | + } |
| 97 | + |
| 98 | + return asr, err |
| 99 | +} |
| 100 | + |
| 101 | +// Collect gets all indices settings metric values |
| 102 | +func (cs *IndicesSettings) Collect(ch chan<- prometheus.Metric) { |
| 103 | + |
| 104 | + cs.totalScrapes.Inc() |
| 105 | + defer func() { |
| 106 | + ch <- cs.up |
| 107 | + ch <- cs.totalScrapes |
| 108 | + ch <- cs.jsonParseFailures |
| 109 | + ch <- cs.readOnlyIndices |
| 110 | + }() |
| 111 | + |
| 112 | + asr, err := cs.fetchAndDecodeIndicesSettings() |
| 113 | + if err != nil { |
| 114 | + cs.readOnlyIndices.Set(0) |
| 115 | + cs.up.Set(0) |
| 116 | + _ = level.Warn(cs.logger).Log( |
| 117 | + "msg", "failed to fetch and decode cluster settings stats", |
| 118 | + "err", err, |
| 119 | + ) |
| 120 | + return |
| 121 | + } |
| 122 | + cs.up.Set(1) |
| 123 | + |
| 124 | + var c int |
| 125 | + for _, value := range asr { |
| 126 | + if value.Settings.IndexInfo.Blocks.ReadOnly == "true" { |
| 127 | + c++ |
| 128 | + } |
| 129 | + } |
| 130 | + cs.readOnlyIndices.Set(float64(c)) |
| 131 | +} |
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