注意所在操作都在,manifests目录下面创建,
➜ manifests git:(master) ✗ cat prometheus-additional.yaml
- job_name: ‘kubernetes-service-endpoints'
kubernetes_sd_configs:
- role: endpoints
relabel_configs:
- source_labels: [__meta_kubernetes_service_annotation_prometheus_io_scrape]
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: kubernetes_namespace
- source_labels: [__meta_kubernetes_service_name]
action: replace
target_label: kubernetes_name
➜ manifests git:(master) ✗
使用这个文件创建一个secret对象并查看
➜ manifests git:(master) ✗ kubectl create secret generic additional-configs --from-file=prometheus-additional.yaml -n monitoring
➜ manifests git:(master) ✗ kubectl get secret additional-configs -n monitoring -o yaml
apiVersion: v1
data:
prometheus-additional.yaml: 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
kind: Secret
metadata:
creationTimestamp: "2020-01-11T06:52:06Z"
name: additional-configs
namespace: monitoring
resourceVersion: "163824"
selfLink: /api/v1/namespaces/monitoring/secrets/additional-configs
uid: 5f9bee51-e18a-4255-b931-8e075c9fab23
type: Opaque
➜ manifests git:(master) ✗
修改prometheus的配置文件,添加如下三行;
additionalScrapeConfigs: # 新添加的内容
name: additional-configs
key: prometheus-additional.yaml
完整配置文件如下,注意格式.
➜ manifests git:(master) ✗ cat prometheus-prometheus.yaml
apiVersion: monitoring.coreos.com/v1
kind: Prometheus
metadata:
labels:
prometheus: k8s
name: k8s
namespace: monitoring
spec:
alerting:
alertmanagers:
- name: alertmanager-main
namespace: monitoring
port: web
baseImage: quay.io/prometheus/prometheus
nodeSelector:
kubernetes.io/os: linux
podMonitorNamespaceSelector: {}
podMonitorSelector: {}
replicas: 2
resources:
requests:
memory: 400Mi
ruleSelector:
matchLabels:
prometheus: k8s
role: alert-rules
securityContext:
fsGroup: 2000
runAsNonRoot: true
runAsUser: 1000
additionalScrapeConfigs: # 新添加的内容
name: additional-configs
key: prometheus-additional.yaml
serviceAccountName: prometheus-k8s
serviceMonitorNamespaceSelector: {}
serviceMonitorSelector: {}
version: v2.11.0
➜ manifests git:(master) ✗
更新prometheus-prometheus.yaml文件
➜ manifests git:(master) ✗ kubectl apply -f prometheus-prometheus.yaml
prometheus.monitoring.coreos.com/k8s configured
➜ manifests git:(master) ✗
如果出现大量**forbidden的报错,需要更新rabc
➜ manifests git:(master) ✗ kubectl logs -f prometheus-k8s-0 prometheus -n monitoring
level=error ts=2020-01-11T06:58:01.492Z caller=klog.go:94 component=k8s_client_runtime func=ErrorDepth msg="/app/discovery/kubernetes/kubernetes.go:264: Failed to list *v1.Service: services is forbidden: User \"system:serviceaccount:monitoring:prometheus-k8s\" cannot list resource \"services\" in API group \"\" at the cluster scope"
level=error ts=2020-01-11T06:58:02.506Z caller=klog.go:94 component=k8s_client_runtime func=ErrorDepth msg="/app/discovery/kubernetes/kubernetes.go:265: Failed to list *v1.Pod: pods is forbidden: User \"system:serviceaccount:monitoring:prometheus-k8s\" cannot list resource \"pods\" in API group \"\" at the cluster scope"
更新rabc文件
➜ manifests git:(master) ✗ cp -a prometheus-clusterRole.yaml prometheus-clusterRole.yaml.bak
➜ manifests git:(master) ✗ vim prometheus-clusterRole.yaml
➜ manifests git:(master) ✗ cat prometheus-clusterRole.yaml
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRole
metadata:
name: prometheus-k8s
rules:
- apiGroups:
- ""
resources:
- nodes
- services
- endpoints
- pods
- nodes/proxy
verbs:
- get
- list
- watch
- apiGroups:
- ""
resources:
- configmaps
- nodes/metrics
verbs:
- get
- nonResourceURLs:
- /metrics
verbs:
- get
➜ manifests git:(master) ✗
应用rabc文件
➜ manifests git:(master) ✗ k apply -f prometheus-clusterRole.yaml
clusterrole.rbac.authorization.k8s.io/prometheus-k8s configured
➜ manifests git:(master) ✗
从prometheus的targets可以看到已经自动发现了端口9153的服务,这是kube-dns
➜ manifests git:(master) ✗ kubectl describe svc kube-dns -n kube-system
Name: kube-dns
Namespace: kube-system
Labels: k8s-app=kube-dns
kubernetes.io/cluster-service=true
kubernetes.io/name=KubeDNS
Annotations: prometheus.io/port: 9153
prometheus.io/scrape: true
Selector: k8s-app=kube-dns
Type: ClusterIP
IP: 10.96.0.10
Port: dns 53/UDP
TargetPort: 53/UDP
Endpoints: 172.17.0.10:53,172.17.0.4:53
Port: dns-tcp 53/TCP
TargetPort: 53/TCP
Endpoints: 172.17.0.10:53,172.17.0.4:53
Port: metrics 9153/TCP
TargetPort: 9153/TCP
Endpoints: 172.17.0.10:9153,172.17.0.4:9153
Session Affinity: None
Events: <none>
➜ manifests git:(master) ✗
验证如图:
See also