Use typed struct instead of type assertions in Ceph Input Plugin (#4721)
This commit is contained in:
Simon Murray
Daniel Nelson
parent
fe0b964d3e
commit
a55e141264
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@ -294,6 +294,7 @@ func flatten(data interface{}) []*metric {
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return metrics
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}
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// exec executes the 'ceph' command with the supplied arguments, returning JSON formatted output
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func (c *Ceph) exec(command string) (string, error) {
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cmdArgs := []string{"--conf", c.CephConfig, "--name", c.CephUser, "--format", "json"}
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cmdArgs = append(cmdArgs, strings.Split(command, " ")...)
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@ -317,145 +318,145 @@ func (c *Ceph) exec(command string) (string, error) {
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return output, nil
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}
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// CephStatus is used to unmarshal "ceph -s" output
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type CephStatus struct {
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OSDMap struct {
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OSDMap struct {
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Epoch float64 `json:"epoch"`
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NumOSDs float64 `json:"num_osds"`
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NumUpOSDs float64 `json:"num_up_osds"`
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NumInOSDs float64 `json:"num_in_osds"`
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Full bool `json:"full"`
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NearFull bool `json:"nearfull"`
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NumRemappedPGs float64 `json:"num_rempapped_pgs"`
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} `json:"osdmap"`
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} `json:"osdmap"`
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PGMap struct {
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PGsByState []struct {
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StateName string `json:"state_name"`
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Count float64 `json:"count"`
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} `json:"pgs_by_state"`
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Version float64 `json:"version"`
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NumPGs float64 `json:"num_pgs"`
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DataBytes float64 `json:"data_bytes"`
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BytesUsed float64 `json:"bytes_used"`
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BytesAvail float64 `json:"bytes_avail"`
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BytesTotal float64 `json:"bytes_total"`
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ReadBytesSec float64 `json:"read_bytes_sec"`
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WriteBytesSec float64 `json:"write_bytes_sec"`
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OpPerSec float64 `json:"op_per_sec"`
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} `json:"pgmap"`
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}
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// decodeStatus decodes the output of 'ceph -s'
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func decodeStatus(acc telegraf.Accumulator, input string) error {
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data := make(map[string]interface{})
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err := json.Unmarshal([]byte(input), &data)
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if err != nil {
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data := &CephStatus{}
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if err := json.Unmarshal([]byte(input), data); err != nil {
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return fmt.Errorf("failed to parse json: '%s': %v", input, err)
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}
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err = decodeStatusOsdmap(acc, data)
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if err != nil {
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return err
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decoders := []func(telegraf.Accumulator, *CephStatus) error{
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decodeStatusOsdmap,
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decodeStatusPgmap,
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decodeStatusPgmapState,
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}
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err = decodeStatusPgmap(acc, data)
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if err != nil {
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return err
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}
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err = decodeStatusPgmapState(acc, data)
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if err != nil {
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return err
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for _, decoder := range decoders {
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if err := decoder(acc, data); err != nil {
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return err
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}
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}
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return nil
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}
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func decodeStatusOsdmap(acc telegraf.Accumulator, data map[string]interface{}) error {
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osdmap, ok := data["osdmap"].(map[string]interface{})
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if !ok {
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return fmt.Errorf("WARNING %s - unable to decode osdmap", measurement)
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}
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fields, ok := osdmap["osdmap"].(map[string]interface{})
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if !ok {
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return fmt.Errorf("WARNING %s - unable to decode osdmap", measurement)
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// decodeStatusOsdmap decodes the OSD map portion of the output of 'ceph -s'
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func decodeStatusOsdmap(acc telegraf.Accumulator, data *CephStatus) error {
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fields := map[string]interface{}{
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"epoch": data.OSDMap.OSDMap.Epoch,
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"num_osds": data.OSDMap.OSDMap.NumOSDs,
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"num_up_osds": data.OSDMap.OSDMap.NumUpOSDs,
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"num_in_osds": data.OSDMap.OSDMap.NumInOSDs,
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"full": data.OSDMap.OSDMap.Full,
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"nearfull": data.OSDMap.OSDMap.NearFull,
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"num_rempapped_pgs": data.OSDMap.OSDMap.NumRemappedPGs,
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}
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acc.AddFields("ceph_osdmap", fields, map[string]string{})
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return nil
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}
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func decodeStatusPgmap(acc telegraf.Accumulator, data map[string]interface{}) error {
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pgmap, ok := data["pgmap"].(map[string]interface{})
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if !ok {
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return fmt.Errorf("WARNING %s - unable to decode pgmap", measurement)
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}
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fields := make(map[string]interface{})
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for key, value := range pgmap {
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switch value.(type) {
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case float64:
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fields[key] = value
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}
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// decodeStatusPgmap decodes the PG map portion of the output of 'ceph -s'
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func decodeStatusPgmap(acc telegraf.Accumulator, data *CephStatus) error {
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fields := map[string]interface{}{
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"version": data.PGMap.Version,
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"num_pgs": data.PGMap.NumPGs,
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"data_bytes": data.PGMap.DataBytes,
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"bytes_used": data.PGMap.BytesUsed,
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"bytes_avail": data.PGMap.BytesAvail,
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"bytes_total": data.PGMap.BytesTotal,
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"read_bytes_sec": data.PGMap.ReadBytesSec,
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"write_bytes_sec": data.PGMap.WriteBytesSec,
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"op_per_sec": data.PGMap.OpPerSec,
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}
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acc.AddFields("ceph_pgmap", fields, map[string]string{})
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return nil
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}
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func extractPgmapStates(data map[string]interface{}) ([]interface{}, error) {
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const key = "pgs_by_state"
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pgmap, ok := data["pgmap"].(map[string]interface{})
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if !ok {
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return nil, fmt.Errorf("WARNING %s - unable to decode pgmap", measurement)
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}
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s, ok := pgmap[key]
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if !ok {
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return nil, fmt.Errorf("WARNING %s - pgmap is missing the %s field", measurement, key)
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}
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states, ok := s.([]interface{})
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if !ok {
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return nil, fmt.Errorf("WARNING %s - pgmap[%s] is not a list", measurement, key)
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}
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return states, nil
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}
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func decodeStatusPgmapState(acc telegraf.Accumulator, data map[string]interface{}) error {
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states, err := extractPgmapStates(data)
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if err != nil {
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return err
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}
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for _, state := range states {
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stateMap, ok := state.(map[string]interface{})
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if !ok {
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return fmt.Errorf("WARNING %s - unable to decode pg state", measurement)
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}
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stateName, ok := stateMap["state_name"].(string)
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if !ok {
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return fmt.Errorf("WARNING %s - unable to decode pg state name", measurement)
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}
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stateCount, ok := stateMap["count"].(float64)
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if !ok {
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return fmt.Errorf("WARNING %s - unable to decode pg state count", measurement)
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}
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// decodeStatusPgmapState decodes the PG map state portion of the output of 'ceph -s'
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func decodeStatusPgmapState(acc telegraf.Accumulator, data *CephStatus) error {
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for _, pgState := range data.PGMap.PGsByState {
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tags := map[string]string{
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"state": stateName,
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"state": pgState.StateName,
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}
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fields := map[string]interface{}{
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"count": stateCount,
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"count": pgState.Count,
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}
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acc.AddFields("ceph_pgmap_state", fields, tags)
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}
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return nil
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}
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// CephDF is used to unmarshal 'ceph df' output
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type CephDf struct {
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Stats struct {
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TotalSpace float64 `json:"total_space"`
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TotalUsed float64 `json:"total_used"`
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TotalAvail float64 `json:"total_avail"`
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} `json:"stats"`
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Pools []struct {
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Name string `json:"name"`
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Stats struct {
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KBUsed float64 `json:"kb_used"`
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BytesUsed float64 `json:"bytes_used"`
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Objects float64 `json:"objects"`
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} `json:"stats"`
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} `json:"pools"`
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}
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// decodeDf decodes the output of 'ceph df'
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func decodeDf(acc telegraf.Accumulator, input string) error {
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data := make(map[string]interface{})
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err := json.Unmarshal([]byte(input), &data)
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if err != nil {
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data := &CephDf{}
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if err := json.Unmarshal([]byte(input), data); err != nil {
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return fmt.Errorf("failed to parse json: '%s': %v", input, err)
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}
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// ceph.usage: records global utilization and number of objects
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stats_fields, ok := data["stats"].(map[string]interface{})
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if !ok {
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return fmt.Errorf("WARNING %s - unable to decode df stats", measurement)
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fields := map[string]interface{}{
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"total_space": data.Stats.TotalSpace,
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"total_used": data.Stats.TotalUsed,
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"total_avail": data.Stats.TotalAvail,
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}
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acc.AddFields("ceph_usage", stats_fields, map[string]string{})
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acc.AddFields("ceph_usage", fields, map[string]string{})
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// ceph.pool.usage: records per pool utilization and number of objects
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pools, ok := data["pools"].([]interface{})
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if !ok {
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return fmt.Errorf("WARNING %s - unable to decode df pools", measurement)
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}
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for _, pool := range pools {
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pool_map, ok := pool.(map[string]interface{})
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if !ok {
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return fmt.Errorf("WARNING %s - unable to decode df pool", measurement)
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}
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pool_name, ok := pool_map["name"].(string)
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if !ok {
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return fmt.Errorf("WARNING %s - unable to decode df pool name", measurement)
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}
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fields, ok := pool_map["stats"].(map[string]interface{})
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if !ok {
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return fmt.Errorf("WARNING %s - unable to decode df pool stats", measurement)
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}
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for _, pool := range data.Pools {
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tags := map[string]string{
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"name": pool_name,
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"name": pool.Name,
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}
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fields := map[string]interface{}{
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"kb_used": pool.Stats.KBUsed,
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"bytes_used": pool.Stats.BytesUsed,
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"objects": pool.Stats.Objects,
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}
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acc.AddFields("ceph_pool_usage", fields, tags)
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}
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@ -463,36 +464,40 @@ func decodeDf(acc telegraf.Accumulator, input string) error {
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return nil
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}
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// CephOSDPoolStats is used to unmarshal 'ceph osd pool stats' output
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type CephOSDPoolStats []struct {
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PoolName string `json:"pool_name"`
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ClientIORate struct {
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ReadBytesSec float64 `json:"read_bytes_sec"`
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WriteBytesSec float64 `json:"write_bytes_sec"`
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OpPerSec float64 `json:"op_per_sec"`
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} `json:"client_io_rate"`
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RecoveryRate struct {
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RecoveringObjectsPerSec float64 `json:"recovering_objects_per_sec"`
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RecoveringBytesPerSec float64 `json:"recovering_bytes_per_sec"`
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RecoveringKeysPerSec float64 `json:"recovering_keys_per_sec"`
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} `json:"recovery_rate"`
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}
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// decodeOsdPoolStats decodes the output of 'ceph osd pool stats'
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func decodeOsdPoolStats(acc telegraf.Accumulator, input string) error {
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data := make([]map[string]interface{}, 0)
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err := json.Unmarshal([]byte(input), &data)
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if err != nil {
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data := CephOSDPoolStats{}
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if err := json.Unmarshal([]byte(input), &data); err != nil {
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return fmt.Errorf("failed to parse json: '%s': %v", input, err)
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}
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// ceph.pool.stats: records pre pool IO and recovery throughput
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for _, pool := range data {
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pool_name, ok := pool["pool_name"].(string)
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if !ok {
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return fmt.Errorf("WARNING %s - unable to decode osd pool stats name", measurement)
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}
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// Note: the 'recovery' object looks broken (in hammer), so it's omitted
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objects := []string{
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"client_io_rate",
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"recovery_rate",
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}
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fields := make(map[string]interface{})
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for _, object := range objects {
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perfdata, ok := pool[object].(map[string]interface{})
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if !ok {
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return fmt.Errorf("WARNING %s - unable to decode osd pool stats", measurement)
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}
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for key, value := range perfdata {
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fields[key] = value
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}
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}
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tags := map[string]string{
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"name": pool_name,
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"name": pool.PoolName,
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}
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fields := map[string]interface{}{
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"read_bytes_sec": pool.ClientIORate.ReadBytesSec,
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"write_bytes_sec": pool.ClientIORate.WriteBytesSec,
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"op_per_sec": pool.ClientIORate.OpPerSec,
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"recovering_objects_per_sec": pool.RecoveryRate.RecoveringObjectsPerSec,
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"recovering_bytes_per_sec": pool.RecoveryRate.RecoveringBytesPerSec,
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"recovering_keys_per_sec": pool.RecoveryRate.RecoveringKeysPerSec,
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}
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acc.AddFields("ceph_pool_stats", fields, tags)
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}
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@ -1,7 +1,6 @@
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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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"io/ioutil"
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"os"
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@ -18,6 +17,12 @@ const (
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epsilon = float64(0.00000001)
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)
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type expectedResult struct {
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metric string
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fields map[string]interface{}
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tags map[string]string
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}
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func TestParseSockId(t *testing.T) {
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s := parseSockId(sockFile(osdPrefix, 1), osdPrefix, sockSuffix)
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assert.Equal(t, s, "1")
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@ -37,26 +42,33 @@ func TestParseOsdDump(t *testing.T) {
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assert.Equal(t, float64(0), dump["mutex-FileJournal::finisher_lock"]["wait.avgcount"])
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}
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func TestDecodeStatusPgmapState(t *testing.T) {
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data := make(map[string]interface{})
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err := json.Unmarshal([]byte(clusterStatusDump), &data)
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assert.NoError(t, err)
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func TestDecodeStatus(t *testing.T) {
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acc := &testutil.Accumulator{}
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err = decodeStatusPgmapState(acc, data)
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err := decodeStatus(acc, clusterStatusDump)
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assert.NoError(t, err)
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var results = []struct {
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fields map[string]interface{}
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tags map[string]string
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}{
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{map[string]interface{}{"count": float64(2560)}, map[string]string{"state": "active+clean"}},
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{map[string]interface{}{"count": float64(10)}, map[string]string{"state": "active+scrubbing"}},
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{map[string]interface{}{"count": float64(5)}, map[string]string{"state": "active+backfilling"}},
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for _, r := range cephStatusResults {
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acc.AssertContainsTaggedFields(t, r.metric, r.fields, r.tags)
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}
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}
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for _, r := range results {
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acc.AssertContainsTaggedFields(t, "ceph_pgmap_state", r.fields, r.tags)
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func TestDecodeDf(t *testing.T) {
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acc := &testutil.Accumulator{}
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err := decodeDf(acc, cephDFDump)
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assert.NoError(t, err)
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for _, r := range cephDfResults {
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acc.AssertContainsTaggedFields(t, r.metric, r.fields, r.tags)
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}
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}
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func TestDecodeOSDPoolStats(t *testing.T) {
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acc := &testutil.Accumulator{}
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err := decodeOsdPoolStats(acc, cephODSPoolStatsDump)
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assert.NoError(t, err)
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for _, r := range cephOSDPoolStatsResults {
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acc.AssertContainsTaggedFields(t, r.metric, r.fields, r.tags)
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}
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}
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@ -834,3 +846,203 @@ var clusterStatusDump = `
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}
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}
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`
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var cephStatusResults = []expectedResult{
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{
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metric: "ceph_osdmap",
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fields: map[string]interface{}{
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"epoch": float64(21734),
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"num_osds": float64(24),
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"num_up_osds": float64(24),
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"num_in_osds": float64(24),
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"full": false,
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"nearfull": false,
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"num_rempapped_pgs": float64(0),
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},
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tags: map[string]string{},
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},
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{
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metric: "ceph_pgmap",
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fields: map[string]interface{}{
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"version": float64(52314277),
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"num_pgs": float64(2560),
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"data_bytes": float64(2700031960713),
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"bytes_used": float64(7478347665408),
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"bytes_avail": float64(9857462382592),
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"bytes_total": float64(17335810048000),
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"read_bytes_sec": float64(0),
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"write_bytes_sec": float64(367217),
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"op_per_sec": float64(98),
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},
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tags: map[string]string{},
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},
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{
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metric: "ceph_pgmap_state",
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fields: map[string]interface{}{
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"count": float64(2560),
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},
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tags: map[string]string{
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"state": "active+clean",
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},
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},
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{
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metric: "ceph_pgmap_state",
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fields: map[string]interface{}{
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"count": float64(10),
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},
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tags: map[string]string{
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"state": "active+scrubbing",
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},
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},
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{
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metric: "ceph_pgmap_state",
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fields: map[string]interface{}{
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"count": float64(5),
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},
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tags: map[string]string{
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"state": "active+backfilling",
|
||||
},
|
||||
},
|
||||
}
|
||||
|
||||
var cephDFDump = `
|
||||
{ "stats": { "total_space": 472345880,
|
||||
"total_used": 71058504,
|
||||
"total_avail": 377286864},
|
||||
"pools": [
|
||||
{ "name": "data",
|
||||
"id": 0,
|
||||
"stats": { "kb_used": 0,
|
||||
"bytes_used": 0,
|
||||
"objects": 0}},
|
||||
{ "name": "metadata",
|
||||
"id": 1,
|
||||
"stats": { "kb_used": 25,
|
||||
"bytes_used": 25052,
|
||||
"objects": 53}},
|
||||
{ "name": "rbd",
|
||||
"id": 2,
|
||||
"stats": { "kb_used": 0,
|
||||
"bytes_used": 0,
|
||||
"objects": 0}},
|
||||
{ "name": "test",
|
||||
"id": 3,
|
||||
"stats": { "kb_used": 55476,
|
||||
"bytes_used": 56806602,
|
||||
"objects": 1}}]}`
|
||||
|
||||
var cephDfResults = []expectedResult{
|
||||
{
|
||||
metric: "ceph_usage",
|
||||
fields: map[string]interface{}{
|
||||
"total_space": float64(472345880),
|
||||
"total_used": float64(71058504),
|
||||
"total_avail": float64(377286864),
|
||||
},
|
||||
tags: map[string]string{},
|
||||
},
|
||||
{
|
||||
metric: "ceph_pool_usage",
|
||||
fields: map[string]interface{}{
|
||||
"kb_used": float64(0),
|
||||
"bytes_used": float64(0),
|
||||
"objects": float64(0),
|
||||
},
|
||||
tags: map[string]string{
|
||||
"name": "data",
|
||||
},
|
||||
},
|
||||
{
|
||||
metric: "ceph_pool_usage",
|
||||
fields: map[string]interface{}{
|
||||
"kb_used": float64(25),
|
||||
"bytes_used": float64(25052),
|
||||
"objects": float64(53),
|
||||
},
|
||||
tags: map[string]string{
|
||||
"name": "metadata",
|
||||
},
|
||||
},
|
||||
{
|
||||
metric: "ceph_pool_usage",
|
||||
fields: map[string]interface{}{
|
||||
"kb_used": float64(0),
|
||||
"bytes_used": float64(0),
|
||||
"objects": float64(0),
|
||||
},
|
||||
tags: map[string]string{
|
||||
"name": "rbd",
|
||||
},
|
||||
},
|
||||
{
|
||||
metric: "ceph_pool_usage",
|
||||
fields: map[string]interface{}{
|
||||
"kb_used": float64(55476),
|
||||
"bytes_used": float64(56806602),
|
||||
"objects": float64(1),
|
||||
},
|
||||
tags: map[string]string{
|
||||
"name": "test",
|
||||
},
|
||||
},
|
||||
}
|
||||
|
||||
var cephODSPoolStatsDump = `
|
||||
[
|
||||
{ "pool_name": "data",
|
||||
"pool_id": 0,
|
||||
"recovery": {},
|
||||
"recovery_rate": {},
|
||||
"client_io_rate": {}},
|
||||
{ "pool_name": "metadata",
|
||||
"pool_id": 1,
|
||||
"recovery": {},
|
||||
"recovery_rate": {},
|
||||
"client_io_rate": {}},
|
||||
{ "pool_name": "rbd",
|
||||
"pool_id": 2,
|
||||
"recovery": {},
|
||||
"recovery_rate": {},
|
||||
"client_io_rate": {}},
|
||||
{ "pool_name": "pbench",
|
||||
"pool_id": 3,
|
||||
"recovery": { "degraded_objects": 18446744073709551562,
|
||||
"degraded_total": 412,
|
||||
"degrated_ratio": "-13.107"},
|
||||
"recovery_rate": { "recovering_objects_per_sec": 279,
|
||||
"recovering_bytes_per_sec": 176401059,
|
||||
"recovering_keys_per_sec": 0},
|
||||
"client_io_rate": { "read_bytes_sec": 10566067,
|
||||
"write_bytes_sec": 15165220376,
|
||||
"op_per_sec": 9828}}]`
|
||||
|
||||
var cephOSDPoolStatsResults = []expectedResult{
|
||||
{
|
||||
metric: "ceph_pool_stats",
|
||||
fields: map[string]interface{}{
|
||||
"read_bytes_sec": float64(0),
|
||||
"write_bytes_sec": float64(0),
|
||||
"op_per_sec": float64(0),
|
||||
"recovering_objects_per_sec": float64(0),
|
||||
"recovering_bytes_per_sec": float64(0),
|
||||
"recovering_keys_per_sec": float64(0),
|
||||
},
|
||||
tags: map[string]string{
|
||||
"name": "data",
|
||||
},
|
||||
},
|
||||
{
|
||||
metric: "ceph_pool_stats",
|
||||
fields: map[string]interface{}{
|
||||
"read_bytes_sec": float64(10566067),
|
||||
"write_bytes_sec": float64(15165220376),
|
||||
"op_per_sec": float64(9828),
|
||||
"recovering_objects_per_sec": float64(279),
|
||||
"recovering_bytes_per_sec": float64(176401059),
|
||||
"recovering_keys_per_sec": float64(0),
|
||||
},
|
||||
tags: map[string]string{
|
||||
"name": "pbench",
|
||||
},
|
||||
},
|
||||
}
|
||||
|
|
|
|||
Loading…
Reference in New Issue