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monitoring.go
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monitoring.go
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// Copyright 2022 SAP SE or an SAP affiliate company. All rights reserved. This file is licensed under the Apache Software License, v. 2 except as noted otherwise in the LICENSE file
//
// 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 kubeproxy
import (
"strconv"
"strings"
v1beta1constants "github.com/gardener/gardener/pkg/apis/core/v1beta1/constants"
kubeapiserverconstants "github.com/gardener/gardener/pkg/component/kubeapiserver/constants"
)
const (
monitoringPrometheusJobName = "kube-proxy"
monitoringMetricNetworkProgrammingDurationSecondsBucket = "kubeproxy_network_programming_duration_seconds_bucket"
monitoringMetricNetworkProgrammingDurationSecondsCount = "kubeproxy_network_programming_duration_seconds_count"
monitoringMetricNetworkProgrammingDurationSecondsSum = "kubeproxy_network_programming_duration_seconds_sum"
monitoringMetricSyncProxyRulesDurationSecondsBucket = "kubeproxy_sync_proxy_rules_duration_seconds_bucket"
monitoringMetricSyncProxyRulesDurationSecondsCount = "kubeproxy_sync_proxy_rules_duration_seconds_count"
monitoringMetricSyncProxyRulesDurationSecondsSum = "kubeproxy_sync_proxy_rules_duration_seconds_sum"
monitoringAlertingRules = `groups:
- name: kube-proxy.rules
rules:
- record: kubeproxy_network_latency:quantile
expr: histogram_quantile(0.99, sum(rate(` + monitoringMetricNetworkProgrammingDurationSecondsBucket + `[10m])) by (le))
labels:
quantile: "0.99"
- record: kubeproxy_network_latency:quantile
expr: histogram_quantile(0.9, sum(rate(` + monitoringMetricNetworkProgrammingDurationSecondsBucket + `[10m])) by (le))
labels:
quantile: "0.9"
- record: kubeproxy_network_latency:quantile
expr: histogram_quantile(0.5, sum(rate(` + monitoringMetricNetworkProgrammingDurationSecondsBucket + `[10m])) by (le))
labels:
quantile: "0.5"
- record: kubeproxy_sync_proxy:quantile
expr: histogram_quantile(0.99, sum(rate(` + monitoringMetricSyncProxyRulesDurationSecondsBucket + `[10m])) by (le))
labels:
quantile: "0.99"
- record: kubeproxy_sync_proxy:quantile
expr: histogram_quantile(0.9, sum(rate(` + monitoringMetricSyncProxyRulesDurationSecondsBucket + `[10m])) by (le))
labels:
quantile: "0.9"
- record: kubeproxy_sync_proxy:quantile
expr: histogram_quantile(0.5, sum(rate(` + monitoringMetricSyncProxyRulesDurationSecondsBucket + `[10m])) by (le))
labels:
quantile: "0.5"
`
)
var (
monitoringAllowedMetrics = []string{
monitoringMetricNetworkProgrammingDurationSecondsBucket,
monitoringMetricNetworkProgrammingDurationSecondsCount,
monitoringMetricNetworkProgrammingDurationSecondsSum,
monitoringMetricSyncProxyRulesDurationSecondsBucket,
monitoringMetricSyncProxyRulesDurationSecondsCount,
monitoringMetricSyncProxyRulesDurationSecondsSum,
}
// TODO: Replace below hard-coded paths to Prometheus certificates once its deployment has been refactored.
monitoringScrapeConfig = `job_name: ` + monitoringPrometheusJobName + `
honor_labels: false
scheme: https
tls_config:
ca_file: /etc/prometheus/seed/ca.crt
authorization:
type: Bearer
credentials_file: /var/run/secrets/gardener.cloud/shoot/token/token
follow_redirects: false
kubernetes_sd_configs:
- role: endpoints
api_server: https://` + v1beta1constants.DeploymentNameKubeAPIServer + `:` + strconv.Itoa(kubeapiserverconstants.Port) + `
namespaces:
names: [ kube-system ]
tls_config:
ca_file: /etc/prometheus/seed/ca.crt
authorization:
type: Bearer
credentials_file: /var/run/secrets/gardener.cloud/shoot/token/token
relabel_configs:
- source_labels:
- __meta_kubernetes_endpoints_name
- __meta_kubernetes_endpoint_port_name
action: keep
regex: ` + serviceName + `;` + portNameMetrics + `
- source_labels: [ __meta_kubernetes_pod_name ]
target_label: pod
- source_labels: [ __meta_kubernetes_pod_node_name ]
target_label: node
- target_label: __address__
replacement: ` + v1beta1constants.DeploymentNameKubeAPIServer + `:` + strconv.Itoa(kubeapiserverconstants.Port) + `
- source_labels: [__meta_kubernetes_pod_name, __meta_kubernetes_pod_container_port_number]
regex: (.+);(.+)
target_label: __metrics_path__
replacement: /api/v1/namespaces/kube-system/pods/${1}:${2}/proxy/metrics
metric_relabel_configs:
- source_labels: [ __name__ ]
action: keep
regex: ^(` + strings.Join(monitoringAllowedMetrics, "|") + `)$
`
)
// ScrapeConfigs returns the scrape configurations for Prometheus.
func (k *kubeProxy) ScrapeConfigs() ([]string, error) {
return []string{monitoringScrapeConfig}, nil
}
// AlertingRules returns the alerting rules for AlertManager.
func (k *kubeProxy) AlertingRules() (map[string]string, error) {
return map[string]string{"kube-proxy.rules.yaml": monitoringAlertingRules}, nil
}