将 Redis 的访问凭据保存到 Secret
为 redis-exporter 创建 secret
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| apiVersion: v1
kind: Secret
metadata:
name: redis-secret
namespace: tools
type: Opaque
data:
password: 123456
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使用 StatefulSet 创建 redis-exporter
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| apiVersion: apps/v1
kind: StatefulSet
metadata:
labels:
app.kubernetes.io/name: redis-exporter
app.kubernetes.io/component: prometheus-exporter
name: redis-exporter
namespace: tools
spec:
podManagementPolicy: OrderedReady
replicas: 0
revisionHistoryLimit: 10
selector:
matchLabels:
app.kubernetes.io/name: redis-exporter
app.kubernetes.io/component: prometheus-exporter
serviceName: ""
template:
metadata:
labels:
app.kubernetes.io/name: redis-exporter
app.kubernetes.io/component: prometheus-exporter
spec:
containers:
- env:
- name: TZ
value: Asia/Shanghai
- name: REDIS_ADDR
value: 127.0.0.1:51000
- name: REDIS_PASSWORD
valueFrom:
secretKeyRef:
key: password
name: redis-secret
image: ccr.ccs.tencentyun.com/rig-agent/redis-exporter:v1.32.0
imagePullPolicy: IfNotPresent
name: redis-exporter
ports:
- containerPort: 9121
name: metric-port
protocol: TCP
resources:
limits:
cpu: 250m
memory: 512Mi
requests:
cpu: 250m
memory: 512Mi
securityContext:
privileged: false
terminationMessagePath: /dev/termination-log
terminationMessagePolicy: File
dnsPolicy: ClusterFirst
imagePullSecrets:
- name: qcloudregistrykey
restartPolicy: Always
schedulerName: default-scheduler
securityContext: {}
terminationGracePeriodSeconds: 30
updateStrategy:
rollingUpdate:
partition: 0
type: RollingUpdate
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确认 redis-exporter 的端点访问正常：http://127.0.0.1:9121/metrics
创建 Service 绑定 redis-exporter
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| apiVersion: v1
kind: Service
metadata:
annotations:
prometheus.io/port: "9121"
prometheus.io/redis-exporter-prometheus-enabled: "true"
name: redis-exporter
namespace: tools
spec:
clusterIP: none
ports:
- name: tcp-9121-9121
port: 9121
protocol: TCP
targetPort: 9121
selector:
app.kubernetes.io/name: redis-exporter
app.kubernetes.io/component: prometheus-exporter
sessionAffinity: None
type: ClusterIP
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加入 Prometheus 监控配置
基于 K8s 服务发现机制解析 redis-exporter 的 endpoints，从而获得所有 Pod 的实例信息。
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| global:
scrape_interval: 15s
evaluation_interval: 15s
- job_name: "redis-exporter"
scrape_interval: 5s
kubernetes_sd_configs:
- role: endpoints
relabel_configs:
- source_labels: [__meta_kubernetes_service_annotation_prometheus_io_redis_exporter_prometheus_enabled]
action: keep
regex: true
- source_labels: [__meta_kubernetes_service_annotation_prometheus_io_scheme]
action: replace
target_label: __scheme__
regex: (https?)
- source_labels: [__meta_kubernetes_service_annotation_prometheus_io_path]
action: replace
target_label: __metrics_path__
regex: (.+)
- source_labels: [__address__, __meta_kubernetes_service_annotation_prometheus_io_port]
action: replace
target_label: __address__
regex: ([^:]+)(?::\d+)?;(\d+)
replacement: $1:$2
- action: labelmap
regex: __meta_kubernetes_service_label_(.+)
- source_labels: [__meta_kubernetes_namespace]
action: replace
target_label: namespace
- source_labels: [__meta_kubernetes_service_name]
action: replace
target_label: service_name
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确认 Prometheus 的目标 Redis 节点状态为 UP
从 Grafana 导入 Redis 监控面板
Grafana Labs 11692
效果如下
