// Collect metrics from the '/metrics/snapshot' endpoint on the master. The '/metrics/snapshot' endpoint returns JSON,
// and all metrics contained in the endpoint use a string as the key, and a double (float64) for the value. For example:
//
// {
// "master/cpus_total": 2.0
// }
//
func GetMetricsSnapshot(host string) (map[string]float64, error) {
log.Debug("Getting metrics snapshot for host ", host)
data := map[string]float64{}
c := client.NewClient(host, "/metrics/snapshot", time.Duration(5))
if err := c.Fetch(&data); err != nil {
log.Error(err)
return nil, err
}
return data, nil
}
// Collect metrics from the '/monitor/statistics' endpoint on the agent. This endpoint returns JSON, and all metrics
// contained in the endpoint use a string as the key. Depending on features enabled on the Mesos agent, additional
// metrics might be available under either the "statistics" object, or additional nested objects (e.g. "perf") as
// defined by the Executor structure, and the structures in mesos_pb2.ResourceStatistics.
func GetMonitoringStatistics(host string) ([]Executor, error) {
log.Debug("Getting monitoring statistics from host ", host)
var executors []Executor
c := client.NewClient(host, "/monitor/statistics", time.Duration(30))
if err := c.Fetch(&executors); err != nil {
log.Error(err)
return nil, err
}
return executors, nil
}
// Get metrics from the '/master/frameworks' endpoint on the master. This endpoint returns JSON about the overall
// state and resource utilization of the frameworks running on the cluster.
func GetFrameworks(host string) ([]*Framework, error) {
log.Debug("Getting active frameworks resource utilization from master ", host)
var frameworks Frameworks
c := client.NewClient(host, "/master/frameworks", time.Duration(10))
if err := c.Fetch(&frameworks); err != nil {
log.Error(err)
return nil, err
}
return frameworks.ActiveFrameworks, nil
}
// Get the configuration flags from the Mesos agent and return them as a map.
func GetFlags(host string) (map[string]string, error) {
log.Debug("Getting configuration flags from host ", host)
flags := &Flags{}
c := client.NewClient(host, "/slave(1)/flags", time.Duration(5))
if err := c.Fetch(&flags); err != nil {
log.Error(err)
return nil, err
}
return flags.Flags, nil
}