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Merge pull request #7 from maitreya-source/master
Add: Added support for ebpf tcptop - Issue#6
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,193 @@ | ||
| /** | ||
| * Copyright 2021 | ||
| * | ||
| * Licensed 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. | ||
| */ | ||
|
|
||
| package ebpf | ||
|
|
||
| import ( | ||
| "context" | ||
| "fmt" | ||
| "net" | ||
| "planet-exporter/collector/task/inventory" | ||
| "planet-exporter/pkg/network" | ||
| "planet-exporter/pkg/prometheus" | ||
| "strconv" | ||
| "sync" | ||
| "time" | ||
|
|
||
| "github.com/prometheus/prom2json" | ||
| log "github.com/sirupsen/logrus" | ||
| ) | ||
|
|
||
| // task that queries ebpf metrics and aggregates them into usable planet metrics. | ||
| type task struct { | ||
| enabled bool | ||
| ebpfAddr string | ||
|
|
||
| hosts []Metric | ||
| mu sync.Mutex | ||
| } | ||
|
|
||
| var ( | ||
| once sync.Once | ||
| singleton task | ||
| ) | ||
|
|
||
| const ( | ||
| send_bytes = "ebpf_exporter_ipv4_send_bytes" | ||
| recv_bytes = "ebpf_exporter_ipv4_recv_bytes" | ||
| ingress = "ingress" | ||
| egress = "egress" | ||
| ) | ||
|
|
||
| func init() { | ||
| singleton = task{ | ||
| enabled: false, | ||
| hosts: []Metric{}, | ||
| mu: sync.Mutex{}, | ||
| } | ||
| } | ||
|
|
||
| // InitTask initial states. | ||
| func InitTask(ctx context.Context, enabled bool, ebpfAddr string) { | ||
| once.Do(func() { | ||
| singleton.enabled = enabled | ||
| singleton.ebpfAddr = ebpfAddr | ||
| }) | ||
| } | ||
|
|
||
| // Metric contains values needed for planet metrics. | ||
| type Metric struct { | ||
| Direction string // ingress or egress | ||
| LocalHostgroup string // e.g. hostgroup | ||
| RemoteHostgroup string | ||
| RemoteIPAddr string | ||
| LocalDomain string // e.g. consul domain | ||
| RemoteDomain string | ||
| Bandwidth float64 | ||
| } | ||
|
|
||
| // Get returns latest metrics from singleton. | ||
| func Get() []Metric { | ||
| singleton.mu.Lock() | ||
| hosts := singleton.hosts | ||
| singleton.mu.Unlock() | ||
|
|
||
| return hosts | ||
| } | ||
|
|
||
| // Collect will process ebpf metrics locally and fill singleton with latest data. | ||
| func Collect(ctx context.Context) error { | ||
| if !singleton.enabled { | ||
| return nil | ||
| } | ||
|
|
||
| if singleton.ebpfAddr == "" { | ||
| return fmt.Errorf("eBPF address is empty") | ||
| } | ||
|
|
||
| startTime := time.Now() | ||
|
|
||
| // Scrape ebpf prometheus endpoint for send_bytes_metric and recv_bytes_metric. | ||
| ebpfScrape, err := prometheus.Scrape(singleton.ebpfAddr) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| var send_bytes_metric *prom2json.Family | ||
| var recv_bytes_metric *prom2json.Family | ||
| for _, v := range ebpfScrape { | ||
| if v.Name == send_bytes { | ||
| send_bytes_metric = v | ||
| } | ||
| if v.Name == recv_bytes { | ||
| recv_bytes_metric = v | ||
| } | ||
| if send_bytes_metric != nil && recv_bytes_metric != nil { | ||
| break | ||
| } | ||
| } | ||
| if send_bytes_metric == nil { | ||
| return fmt.Errorf("Metric %v doesn't exist", send_bytes) | ||
| } | ||
| if recv_bytes_metric == nil { | ||
| return fmt.Errorf("Metric %v doesn't exist", recv_bytes) | ||
| } | ||
|
|
||
| sendHostBytes, err := toHostMetrics(send_bytes_metric, egress) | ||
| if err != nil { | ||
| log.Errorf("Conversion to host metric failed for %v, err: %v", send_bytes, err) | ||
| } | ||
| recvHostBytes, err := toHostMetrics(recv_bytes_metric, ingress) | ||
| if err != nil { | ||
| log.Errorf("Conversion to host metric failed for %v, err: %v", recv_bytes, err) | ||
| } | ||
|
|
||
| singleton.mu.Lock() | ||
| singleton.hosts = append(sendHostBytes, recvHostBytes...) | ||
| singleton.mu.Unlock() | ||
|
|
||
| log.Debugf("taskebpf.Collect retrieved %v metrics", len(sendHostBytes)+len(recvHostBytes)) | ||
| log.Debugf("taskebpf.Collect process took %v", time.Since(startTime)) | ||
| return nil | ||
| } | ||
|
|
||
| // toHostMetrics converts ebpf metrics into planet explorer prometheus metrics. | ||
| func toHostMetrics(bytes_metric *prom2json.Family, direction string) ([]Metric, error) { | ||
| var hosts []Metric | ||
| inventoryHosts := inventory.Get() | ||
|
|
||
| localAddr, err := network.DefaultLocalAddr() | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| // To label source traffic that we need to build dependency graph. | ||
| localHostgroup := localAddr.String() | ||
| localDomain := localAddr.String() | ||
| localInventory, ok := inventoryHosts[localAddr.String()] | ||
| if ok { | ||
| localHostgroup = localInventory.Hostgroup | ||
| localDomain = localInventory.Domain | ||
| } | ||
| log.Debugf("Local address doesn't exist in the inventory: %v", localAddr.String()) | ||
|
|
||
| for _, m := range bytes_metric.Metrics { | ||
| metric := m.(prom2json.Metric) | ||
| destIp := net.ParseIP(metric.Labels["daddr"]) | ||
|
|
||
| if destIp.Equal(localAddr) || destIp.Equal(nil) { | ||
| continue | ||
| } | ||
|
|
||
| inventoryHostInfo := inventoryHosts[metric.Labels["daddr"]] | ||
|
|
||
| bandwidth, err := strconv.ParseFloat(metric.Value, 64) | ||
| if err != nil { | ||
| log.Errorf("Failed to parse 'bytes_metric' value: %v", err) | ||
| continue | ||
| } | ||
|
|
||
| hosts = append(hosts, Metric{ | ||
| LocalHostgroup: localHostgroup, | ||
| RemoteHostgroup: inventoryHostInfo.Hostgroup, | ||
| RemoteIPAddr: metric.Labels["daddr"], | ||
| LocalDomain: localDomain, | ||
| RemoteDomain: inventoryHostInfo.Domain, | ||
| Direction: direction, | ||
| Bandwidth: bandwidth, | ||
| }) | ||
| } | ||
| return hosts, nil | ||
| } |