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package collector
import (
"time"
"github.com/golang/glog"
"github.com/prometheus/client_golang/prometheus"
"gopkg.in/mgo.v2"
"gopkg.in/mgo.v2/bson"
)
var (
instanceUptimeSeconds = prometheus.NewGauge(prometheus.GaugeOpts{
Namespace: Namespace,
Subsystem: "instance",
Name: "uptime_seconds",
Help: "The value of the uptime field corresponds to the number of seconds that the mongos or mongod process has been active.",
})
instanceUptimeEstimateSeconds = prometheus.NewGauge(prometheus.GaugeOpts{
Namespace: Namespace,
Subsystem: "instance",
Name: "uptime_estimate_seconds",
Help: "uptimeEstimate provides the uptime as calculated from MongoDB's internal course-grained time keeping system.",
})
instanceLocalTime = prometheus.NewGauge(prometheus.GaugeOpts{
Namespace: Namespace,
Subsystem: "instance",
Name: "local_time",
Help: "The localTime value is the current time, according to the server, in UTC specified in an ISODate format.",
})
)
// ServerStatus keeps the data returned by the serverStatus() method.
type ServerStatus struct {
Uptime float64 `bson:"uptime"`
UptimeEstimate float64 `bson:"uptimeEstimate"`
LocalTime time.Time `bson:"localTime"`
Asserts *AssertsStats `bson:"asserts"`
Dur *DurStats `bson:"dur"`
BackgroundFlushing *FlushStats `bson:"backgroundFlushing"`
Connections *ConnectionStats `bson:"connections"`
ExtraInfo *ExtraInfo `bson:"extra_info"`
GlobalLock *GlobalLockStats `bson:"globalLock"`
IndexCounter *IndexCounterStats `bson:"indexCounters"`
Locks LockStatsMap `bson:"locks,omitempty"`
Network *NetworkStats `bson:"network"`
Opcounters *OpcountersStats `bson:"opcounters"`
OpcountersRepl *OpcountersReplStats `bson:"opcountersRepl"`
Mem *MemStats `bson:"mem"`
Metrics *MetricsStats `bson:"metrics"`
Cursors *Cursors `bson:"cursors"`
StorageEngine *StorageEngineStats `bson:"storageEngine"`
WiredTiger *WiredTigerStats `bson:"wiredTiger"`
}
// Export exports the server status to be consumed by prometheus.
func (status *ServerStatus) Export(ch chan<- prometheus.Metric) {
instanceUptimeSeconds.Set(status.Uptime)
instanceUptimeEstimateSeconds.Set(status.Uptime)
instanceLocalTime.Set(float64(status.LocalTime.Unix()))
instanceUptimeSeconds.Collect(ch)
instanceUptimeEstimateSeconds.Collect(ch)
instanceLocalTime.Collect(ch)
if status.Asserts != nil {
status.Asserts.Export(ch)
}
if status.Dur != nil {
status.Dur.Export(ch)
}
if status.BackgroundFlushing != nil {
status.BackgroundFlushing.Export(ch)
}
if status.Connections != nil {
status.Connections.Export(ch)
}
if status.ExtraInfo != nil {
status.ExtraInfo.Export(ch)
}
if status.GlobalLock != nil {
status.GlobalLock.Export(ch)
}
if status.IndexCounter != nil {
status.IndexCounter.Export(ch)
}
if status.Network != nil {
status.Network.Export(ch)
}
if status.Opcounters != nil {
status.Opcounters.Export(ch)
}
if status.OpcountersRepl != nil {
status.OpcountersRepl.Export(ch)
}
if status.Mem != nil {
status.Mem.Export(ch)
}
if status.Locks != nil {
status.Locks.Export(ch)
}
if status.Metrics != nil {
status.Metrics.Export(ch)
}
if status.Cursors != nil {
status.Cursors.Export(ch)
}
if status.WiredTiger != nil {
status.WiredTiger.Export(ch)
}
// If db.serverStatus().storageEngine does not exist (3.0+ only) and status.BackgroundFlushing does (MMAPv1 only), default to mmapv1
// https://docs.mongodb.com/v3.0/reference/command/serverStatus/#storageengine
if status.StorageEngine == nil && status.BackgroundFlushing != nil {
status.StorageEngine = &StorageEngineStats{
Name: "mmapv1",
}
}
if status.StorageEngine != nil {
status.StorageEngine.Export(ch)
}
}
// Describe describes the server status for prometheus.
func (status *ServerStatus) Describe(ch chan<- *prometheus.Desc) {
instanceUptimeSeconds.Describe(ch)
instanceUptimeEstimateSeconds.Describe(ch)
instanceLocalTime.Describe(ch)
if status.Asserts != nil {
status.Asserts.Describe(ch)
}
if status.Dur != nil {
status.Dur.Describe(ch)
}
if status.BackgroundFlushing != nil {
status.BackgroundFlushing.Describe(ch)
}
if status.Connections != nil {
status.Connections.Describe(ch)
}
if status.ExtraInfo != nil {
status.ExtraInfo.Describe(ch)
}
if status.GlobalLock != nil {
status.GlobalLock.Describe(ch)
}
if status.IndexCounter != nil {
status.IndexCounter.Describe(ch)
}
if status.Network != nil {
status.Network.Describe(ch)
}
if status.Opcounters != nil {
status.Opcounters.Describe(ch)
}
if status.OpcountersRepl != nil {
status.OpcountersRepl.Describe(ch)
}
if status.Mem != nil {
status.Mem.Describe(ch)
}
if status.Locks != nil {
status.Locks.Describe(ch)
}
if status.Metrics != nil {
status.Metrics.Describe(ch)
}
if status.Cursors != nil {
status.Cursors.Describe(ch)
}
if status.WiredTiger != nil {
status.WiredTiger.Describe(ch)
}
if status.StorageEngine != nil {
status.StorageEngine.Describe(ch)
}
}
// GetServerStatus returns the server status info.
func GetServerStatus(session *mgo.Session) *ServerStatus {
result := &ServerStatus{}
err := session.DB("admin").Run(bson.D{{"serverStatus", 1}, {"recordStats", 0}}, result)
if err != nil {
glog.Error("Failed to get server status.")
return nil
}
return result
}
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