forked from ccfos/huatuo
122 lines
2.9 KiB
Go
122 lines
2.9 KiB
Go
// Copyright 2025 The HuaTuo Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package collector
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import (
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"bufio"
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"fmt"
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"os"
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"strconv"
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"strings"
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"huatuo-bamai/internal/pod"
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"huatuo-bamai/pkg/metric"
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"huatuo-bamai/pkg/tracing"
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)
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var arpCachePath = "/proc/net/stat/arp_cache"
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type arpCollector struct {
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metric []*metric.Data
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}
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func init() {
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tracing.RegisterEventTracing("arp", newArp)
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}
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func newArp() (*tracing.EventTracingAttr, error) {
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return &tracing.EventTracingAttr{
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TracingData: &arpCollector{
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metric: []*metric.Data{
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metric.NewGaugeData("entries", 0, "host init namespace", nil),
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metric.NewGaugeData("total", 0, "arp_cache entries", nil),
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},
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},
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Flag: tracing.FlagMetric,
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}, nil
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}
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// NetStat contains statistics for all the counters from one file.
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// should be exported for /proc/net/stat/ndisc_cache
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type NetStat struct {
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Stats map[string]uint64
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Filename string
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}
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func parseNetstatCache(filePath string) (NetStat, error) {
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netStat := NetStat{
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Stats: make(map[string]uint64),
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}
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file, err := os.Open(filePath)
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if err != nil {
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return netStat, err
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}
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defer file.Close()
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scanner := bufio.NewScanner(file)
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scanner.Scan()
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// First string is always a header for stats
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var headers []string
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headers = append(headers, strings.Fields(scanner.Text())...)
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// Fast path ...
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scanner.Scan()
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for num, counter := range strings.Fields(scanner.Text()) {
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value, err := strconv.ParseUint(counter, 16, 64)
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if err != nil {
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return NetStat{}, err
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}
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netStat.Stats[headers[num]] = value
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}
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return netStat, nil
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}
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func (c *arpCollector) Update() ([]*metric.Data, error) {
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arpMetric := []*metric.Data{}
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containers, err := pod.GetNormalContainers()
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if err != nil {
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return nil, fmt.Errorf("GetNormalContainers: %w", err)
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}
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for _, container := range containers {
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count, err := fileLineCounter(fmt.Sprintf("/proc/%d/net/arp", container.InitPid))
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if err != nil {
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return nil, err
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}
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arpMetric = append(arpMetric, metric.NewContainerGaugeData(container, "entries", float64(count-1), "arp for container and host", nil))
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}
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count, err := fileLineCounter("/proc/1/net/arp")
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if err != nil {
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return nil, err
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}
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stat, err := parseNetstatCache(arpCachePath)
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if err != nil {
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return nil, err
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}
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c.metric[0].Value = float64(count - 1)
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c.metric[1].Value = float64(stat.Stats["entries"])
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arpMetric = append(arpMetric, c.metric...)
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return arpMetric, nil
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}
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