| package cache |
| |
| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| |
| import ( |
| "bufio" |
| "errors" |
| "fmt" |
| "io" |
| "strconv" |
| "strings" |
| |
| "github.com/apache/trafficcontrol/lib/go-log" |
| ) |
| |
| type astatsDataCsv struct { |
| Ats map[string]interface{} |
| } |
| |
| func astatsCsvParseCsv(cacheName string, data io.Reader) (Statistics, map[string]interface{}, error) { |
| var stats Statistics |
| var err error |
| if data == nil { |
| log.Warnf("Cannot read stats data for cache '%s' - nil data reader", cacheName) |
| return stats, nil, errors.New("handler got nil reader") |
| } |
| |
| var atsData astatsDataCsv |
| var allData []string |
| scanner := bufio.NewScanner(data) |
| for scanner.Scan() { |
| allData = append(allData, scanner.Text()) |
| } |
| |
| atsData.Ats = make(map[string]interface{}, len(allData)) |
| |
| for _, line := range allData { |
| delim := strings.IndexByte(line, ',') |
| |
| // No delimiter found, skip this line as invalid |
| if delim < 0 { |
| continue |
| } |
| // Special cases where we just want the string value |
| if strings.Contains(line[0:delim], "proc.") || strings.Contains(line[0:delim], "inf.name") { |
| atsData.Ats[line[0:delim]] = line[delim+1:] |
| } else { |
| value, err := strconv.ParseFloat(line[delim+1:], 64) |
| |
| // Skip values that dont parse |
| if err != nil { |
| continue |
| } |
| atsData.Ats[line[0:delim]] = value |
| } |
| } |
| |
| if len(atsData.Ats) < 1 { |
| return stats, nil, errors.New("no 'global' data object found in stats_over_http payload") |
| } |
| |
| statMap := atsData.Ats |
| |
| // Handle system specific values and remove them from the map for precomputing to not have issues |
| if loadAvg, hadLoadAvg := statMap["proc.loadavg"].(string); !hadLoadAvg { |
| return stats, nil, fmt.Errorf("failed to parse loadavg line for cache '%s': %v", cacheName, "no proc.loadavg in Astats response") |
| } else if stats.Loadavg, err = LoadavgFromRawLine(loadAvg); err != nil { |
| return stats, nil, fmt.Errorf("parsing loadavg for cache '%s': %v", cacheName, err) |
| } else { |
| delete(statMap, "proc.loadavg") |
| } |
| |
| if procNetDev, hadProcNetDev := statMap["proc.net.dev"].(string); !hadProcNetDev { |
| return stats, nil, fmt.Errorf("failed to parse interface line for cache '%s': %v", cacheName, "no proc.net.dev in Astats response") |
| } else if err := stats.AddInterfaceFromRawLine(procNetDev); err != nil { |
| return stats, nil, fmt.Errorf("failed to parse interface line for cache '%s': %v", cacheName, err) |
| } else { |
| delete(statMap, "proc.net.dev") |
| } |
| |
| if infName, hadinf := statMap["inf.name"].(string); !hadinf { |
| return stats, nil, fmt.Errorf("failed to parse inf line for cache '%s': %v", cacheName, "no inf.name in Astats response") |
| } else if inf, err := stats.Interfaces[infName]; !err { |
| return stats, nil, errors.New("/proc/net/dev line didn't match reported interface line") |
| } else { |
| if infSpeed, hadspeed := statMap["inf.speed"].(float64); !hadspeed { |
| return stats, nil, fmt.Errorf("failed to parse interface speed line for cache '%s': %v", cacheName, "no inf.speed in Astats response") |
| } else { |
| inf.Speed = int64(infSpeed) |
| stats.Interfaces[infName] = inf |
| delete(statMap, "inf.speed") |
| delete(statMap, "inf.name") |
| } |
| } |
| |
| // Clean up other non-stats entries |
| nonStats := []string{ |
| "astatsLoad", |
| "lastReloadRequest", |
| "version", |
| "something", |
| "lastReload", |
| "configReloadRequests", |
| "configReloads", |
| } |
| for _, nonStat := range nonStats { |
| delete(statMap, nonStat) |
| } |
| |
| if len(stats.Interfaces) < 1 { |
| return stats, nil, fmt.Errorf("cache '%s' had no interfaces", cacheName) |
| } |
| |
| return stats, statMap, nil |
| } |