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chaos-daemon.go
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chaos-daemon.go
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// Copyright 2021 Chaos Mesh Authors.
//
// 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 metrics
import (
"context"
"github.com/go-logr/logr"
grpcprometheus "github.com/grpc-ecosystem/go-grpc-prometheus"
"github.com/prometheus/client_golang/prometheus"
"github.com/chaos-mesh/chaos-mesh/pkg/chaosdaemon/crclients"
"github.com/chaos-mesh/chaos-mesh/pkg/log"
"github.com/chaos-mesh/chaos-mesh/pkg/metrics/utils"
)
var (
// DefaultChaosDaemonMetricsCollector is the default metrics collector for chaos daemon
DefaultChaosDaemonMetricsCollector = NewChaosDaemonMetricsCollector(log.L().WithName("chaos-daemon").WithName("metrics"))
// ChaosDaemonGrpcServerBuckets is the buckets for gRPC server handling histogram metrics
ChaosDaemonGrpcServerBuckets = []float64{0.001, 0.01, 0.1, 0.3, 0.6, 1, 3, 6, 10}
)
const (
// kubernetesPodNameLabel, kubernetesPodNamespaceLabel and kubernetesContainerNameLabel are the label keys
// indicating the kubernetes information of the container under `k8s.io/kubernetes` package
// And it is best not to set `k8s.io/kubernetes` as dependency, see more: https://github.com/kubernetes/kubernetes/issues/90358#issuecomment-617859364.
kubernetesPodNameLabel = "io.kubernetes.pod.name"
kubernetesPodNamespaceLabel = "io.kubernetes.pod.namespace"
kubernetesContainerNameLabel = "io.kubernetes.container.name"
)
func WithHistogramName(name string) grpcprometheus.HistogramOption {
return func(opts *prometheus.HistogramOpts) {
opts.Name = name
}
}
type ChaosDaemonMetricsCollector struct {
crClient crclients.ContainerRuntimeInfoClient
logger logr.Logger
iptablesPackets *prometheus.GaugeVec
iptablesPacketBytes *prometheus.GaugeVec
ipsetMembers *prometheus.GaugeVec
tcRules *prometheus.GaugeVec
}
// NewChaosDaemonMetricsCollector initializes metrics for each chaos daemon
func NewChaosDaemonMetricsCollector(logger logr.Logger) *ChaosDaemonMetricsCollector {
return &ChaosDaemonMetricsCollector{
logger: logger,
iptablesPackets: prometheus.NewGaugeVec(prometheus.GaugeOpts{
Name: "chaos_daemon_iptables_packets",
Help: "Total number of iptables packets",
}, []string{"namespace", "pod", "container", "table", "chain", "policy", "rule"}),
iptablesPacketBytes: prometheus.NewGaugeVec(prometheus.GaugeOpts{
Name: "chaos_daemon_iptables_packet_bytes",
Help: "Total bytes of iptables packets",
}, []string{"namespace", "pod", "container", "table", "chain", "policy", "rule"}),
ipsetMembers: prometheus.NewGaugeVec(prometheus.GaugeOpts{
Name: "chaos_daemon_ipset_members",
Help: "Total number of ipset members",
}, []string{"namespace", "pod", "container"}),
tcRules: prometheus.NewGaugeVec(prometheus.GaugeOpts{
Name: "chaos_daemon_tcs",
Help: "Total number of tc rules",
}, []string{"namespace", "pod", "container"}),
}
}
func (collector *ChaosDaemonMetricsCollector) Describe(ch chan<- *prometheus.Desc) {
collector.iptablesPackets.Describe(ch)
collector.iptablesPacketBytes.Describe(ch)
collector.ipsetMembers.Describe(ch)
collector.tcRules.Describe(ch)
}
func (collector *ChaosDaemonMetricsCollector) Collect(ch chan<- prometheus.Metric) {
collector.collectNetworkMetrics()
collector.iptablesPackets.Collect(ch)
collector.iptablesPacketBytes.Collect(ch)
collector.ipsetMembers.Collect(ch)
collector.tcRules.Collect(ch)
}
func (collector *ChaosDaemonMetricsCollector) InjectCrClient(client crclients.ContainerRuntimeInfoClient) *ChaosDaemonMetricsCollector {
collector.crClient = client
return collector
}
func (collector *ChaosDaemonMetricsCollector) collectNetworkMetrics() {
collector.iptablesPackets.Reset()
collector.iptablesPacketBytes.Reset()
collector.ipsetMembers.Reset()
collector.tcRules.Reset()
containerIDs, err := collector.crClient.ListContainerIDs(context.Background())
if err != nil {
collector.logger.Error(err, "fail to list all container process IDs")
return
}
for _, containerID := range containerIDs {
pid, err := collector.crClient.GetPidFromContainerID(context.Background(), containerID)
if err != nil {
collector.logger.Error(err, "fail to get pid from container ID")
continue
}
labels, err := collector.crClient.GetLabelsFromContainerID(context.Background(), containerID)
if err != nil {
collector.logger.Error(err, "fail to get container labels", "containerID", containerID)
continue
}
namespace, podName, containerName := labels[kubernetesPodNamespaceLabel],
labels[kubernetesPodNameLabel], labels[kubernetesContainerNameLabel]
labelValues := []string{namespace, podName, containerName}
log := collector.logger.WithValues(
"namespace", namespace,
"podName", podName,
"containerName", containerName,
"containerID", containerID,
)
tables, err := utils.GetIptablesContentByNetNS(pid)
if err != nil {
log.Error(err, "fail to collect iptables metrics")
}
for tableName, table := range tables {
for chainName, chain := range table {
for _, rule := range chain.Rules {
collector.iptablesPackets.
WithLabelValues(namespace, podName, containerName, tableName, chainName, chain.Policy, rule.Rule).
Set(float64(rule.Packets))
collector.iptablesPacketBytes.
WithLabelValues(namespace, podName, containerName, tableName, chainName, chain.Policy, rule.Rule).
Set(float64(rule.Bytes))
}
}
}
members, err := utils.GetIPSetRulesNumberByNetNS(pid)
if err != nil {
log.Error(err, "fail to collect ipset member metric")
}
collector.ipsetMembers.WithLabelValues(labelValues...).Set(float64(members))
tcRules, err := utils.GetTcRulesNumberByNetNS(pid)
if err != nil {
log.Error(err, "fail to collect tc rules metric")
}
collector.tcRules.WithLabelValues(labelValues...).Set(float64(tcRules))
}
}