基于Kubernetes平台部署Prometheus
【原文链接】基于Kubernetes平台部署Prometheus
文章目录
- 一、编写配置文件
-
- 1.1 编写 prometheus-rbac.yml 配置文件
- 1.2 编写 prometheus-node-exporter.yml 配置文件
- 1.3 编写prometheus-configmap.yml配置文件
- 1.4 编写prometheus-deploy.yml配置文件
- 二、部署Prometheus
-
- 2.1 部署Prometheus
- 2.2 验证Prometheus
一、编写配置文件
1.1 编写 prometheus-rbac.yml 配置文件
编写配置文件如下
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRole
metadata:
name: prometheus
rules:
- apiGroups: [""]
resources:
- nodes
- nodes/proxy
- services
- endpoints
- pods
verbs: ["get", "list", "watch"]
- apiGroups:
- extensions
resources:
- ingresses
verbs: ["get", "list", "watch"]
- nonResourceURLs: ["/metrics"]
verbs: ["get"]
---
apiVersion: v1
kind: ServiceAccount
metadata:
name: prometheus
namespace: logging
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
name: prometheus
roleRef:
apiGroup: rbac.authorization.k8s.io
kind: ClusterRole
name: prometheus
subjects:
- kind: ServiceAccount
name: prometheus
namespace: logging
配置文件修改注意点：
（1）这里只需要修改一下namespace即可，比如这里修改为与grafana使用同一个namespace，即logging
1.2 编写 prometheus-node-exporter.yml 配置文件
编写配置文件如下：
apiVersion: apps/v1
kind: DaemonSet
metadata:
name: node-exporter
namespace: logging
spec:
revisionHistoryLimit: 10
selector:
matchLabels:
name: node-exporter
template:
metadata:
labels:
name: node-exporter
app: node-exporter
spec:
containers:
- args:
- --path.procfs=/host/proc
- --path.sysfs=/host/sys
- --web.listen-address=0.0.0.0:9100
image: quay.io/prometheus/node-exporter
imagePullPolicy: Always
livenessProbe:
failureThreshold: 3
httpGet:
path: /
port: 9100
scheme: HTTP
periodSeconds: 10
successThreshold: 1
timeoutSeconds: 1
name: node-exporter
ports:
- containerPort: 9100
hostPort: 9100
name: metrics
protocol: TCP
readinessProbe:
failureThreshold: 3
httpGet:
path: /
port: 9100
scheme: HTTP
periodSeconds: 10
successThreshold: 1
timeoutSeconds: 1
resources:
limits:
cpu: 60m
memory: 50Mi
requests:
cpu: 60m
memory: 50Mi
volumeMounts:
- mountPath: /host/proc
name: proc
readOnly: true
- mountPath: /host/sys
name: sys
readOnly: true
hostNetwork: true
hostPID: true
nodeSelector:
kubernetes.io/os: linux
securityContext:
fsGroup: 65534
runAsGroup: 65534
runAsNonRoot: true
runAsUser: 65534
terminationGracePeriodSeconds: 30
tolerations:
- effect: NoSchedule
key: node-role.kubernetes.io/master
volumes:
- hostPath:
path: /proc
type: ""
name: proc
- hostPath:
path: /sys
type: ""
name: sys
updateStrategy:
rollingUpdate:
maxUnavailable: 1
type: RollingUpdate
---
apiVersion: v1
kind: Service
metadata:
name: node-exporter
namespace: logging
labels:
app: node-exporter
annotations:
prometheus.io/scrape: 'true'
spec:
selector:
app: node-exporter
ports:
- name: node-exporter
port: 9100
protocol: TCP
targetPort: 9100
clusterIP: None
配置文件修改注意点：
（1）这里只需要修改一下namespace即可，比如这里修改为与grafana使用同一个namespace，即logging
1.3 编写prometheus-configmap.yml配置文件
编写文件如下：
apiVersion: v1
kind: ConfigMap
metadata:
name: prometheus-config
namespace: logging
data:
prometheus.yml: |
global:
scrape_interval: 15s
evaluation_interval: 15s
scrape_configs:
- job_name: 'kubernetes-apiservers'
kubernetes_sd_configs:
- role: endpoints
scheme: https
tls_config:
ca_file: /var/run/secrets/kubernetes.io/serviceaccount/ca.crt
bearer_token_file: /var/run/secrets/kubernetes.io/serviceaccount/token
relabel_configs:
- source_labels: [__meta_kubernetes_namespace, __meta_kubernetes_service_name, __meta_kubernetes_endpoint_port_name]
action: keep
regex: default;kubernetes;https
- job_name: 'kubernetes-nodes'
kubernetes_sd_configs:
- role: node
scheme: https
tls_config:
ca_file: /var/run/secrets/kubernetes.io/serviceaccount/ca.crt
bearer_token_file: /var/run/secrets/kubernetes.io/serviceaccount/token
relabel_configs:
- action: labelmap
regex: __meta_kubernetes_node_label_(.+)
- target_label: __address__
replacement: kubernetes.default.svc:443
- source_labels: [__meta_kubernetes_node_name]
regex: (.+)
target_label: __metrics_path__
replacement: /api/v1/nodes/${1}/proxy/metrics
- job_name: 'kubernetes-cadvisor'
kubernetes_sd_configs:
- role: node
scheme: https
tls_config:
ca_file: /var/run/secrets/kubernetes.io/serviceaccount/ca.crt
bearer_token_file: /var/run/secrets/kubernetes.io/serviceaccount/token
relabel_configs:
- action: labelmap
regex: __meta_kubernetes_node_label_(.+)
- target_label: __address__
replacement: kubernetes.default.svc:443
- source_labels: [__meta_kubernetes_node_name]
regex: (.+)
target_label: __metrics_path__
replacement: /api/v1/nodes/${1}/proxy/metrics/cadvisor
- 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
- job_name: 'kubernetes-services'
kubernetes_sd_configs:
- role: service
metrics_path: /probe
params:
module: [http_2xx]
relabel_configs:
- source_labels: [__meta_kubernetes_service_annotation_prometheus_io_probe]
action: keep
regex: true
- source_labels: [__address__]
target_label: __param_target
- target_label: __address__
replacement: blackbox-exporter.example.com:9115
- source_labels: [__param_target]
target_label: instance
- action: labelmap
regex: __meta_kubernetes_service_label_(.+)
- source_labels: [__meta_kubernetes_namespace]
target_label: kubernetes_namespace
- source_labels: [__meta_kubernetes_service_name]
target_label: kubernetes_name
- job_name: 'kubernetes-ingresses'
kubernetes_sd_configs:
- role: ingress
relabel_configs:
- source_labels: [__meta_kubernetes_ingress_annotation_prometheus_io_probe]
action: keep
regex: true
- source_labels: [__meta_kubernetes_ingress_scheme,__address__,__meta_kubernetes_ingress_path]
regex: (.+);(.+);(.+)
replacement: ${1}://${2}${3}
target_label: __param_target
- target_label: __address__
replacement: blackbox-exporter.example.com:9115
- source_labels: [__param_target]
target_label: instance
- action: labelmap
regex: __meta_kubernetes_ingress_label_(.+)
- source_labels: [__meta_kubernetes_namespace]
target_label: kubernetes_namespace
- source_labels: [__meta_kubernetes_ingress_name]
target_label: kubernetes_name
- job_name: 'kubernetes-pods'
kubernetes_sd_configs:
- role: pod
relabel_configs:
- source_labels: [__meta_kubernetes_pod_annotation_prometheus_io_scrape]
action: keep
regex: true
- source_labels: [__meta_kubernetes_pod_annotation_prometheus_io_path]
action: replace
target_label: __metrics_path__
regex: (.+)
- source_labels: [__address__, __meta_kubernetes_pod_annotation_prometheus_io_port]
action: replace
regex: ([^:]+)(?::\d+)?;(\d+)
replacement: $1:$2
target_label: __address__
- action: labelmap
regex: __meta_kubernetes_pod_label_(.+)
- source_labels: [__meta_kubernetes_namespace]
action: replace
target_label: kubernetes_namespace
- source_labels: [__meta_kubernetes_pod_name]
action: replace
target_label: kubernetes_pod_name
配置文件修改注意点：
（1）这里只需要修改一下namespace即可，比如这里修改为与grafana使用同一个namespace，即logging
1.4 编写prometheus-deploy.yml配置文件
编写文件如下
apiVersion: apps/v1
kind: Deployment
metadata:
labels:
name: prometheus-deployment
name: prometheus
namespace: logging
spec:
replicas: 1
selector:
matchLabels:
app: prometheus
template:
metadata:
labels:
app: prometheus
spec:
containers:
- image: quay.io/prometheus/prometheus
livenessProbe:
failureThreshold: 3
httpGet:
path: /-/healthy
port: 9090
scheme: HTTP
periodSeconds: 10
successThreshold: 1
timeoutSeconds: 1
readinessProbe:
failureThreshold: 3
httpGet:
path: /-/healthy
port: 9090
scheme: HTTP
periodSeconds: 10
successThreshold: 1
timeoutSeconds: 1
name: prometheus
command:
- "/bin/prometheus"
args:
- "--config.file=/etc/prometheus/prometheus.yml"
- "--storage.tsdb.path=/prometheus"
- "--storage.tsdb.retention=24h"
- "--web.enable-lifecycle"
ports:
- containerPort: 9090
protocol: TCP
volumeMounts:
- mountPath: "/prometheus"
name: data
- mountPath: "/etc/prometheus"
name: config-volume
# resources:
# requests:
# cpu: 100m
# memory: 100Mi
# limits:
# cpu: 500m
# memory: 2500Mi
serviceAccountName: prometheus
volumes:
- name: data
emptyDir: {}
- name: config-volume
configMap:
name: prometheus-config
---
kind: Service
apiVersion: v1
metadata:
labels:
app: prometheus
name: prometheus
namespace: logging
spec:
type: NodePort
ports:
- port: 9090
targetPort: 9090
nodePort: 30202
selector:
app: prometheus
配置文件修改注意点：
（1）这里只需要修改一下namespace即可，比如这里修改为与grafana使用同一个namespace，即logging
（2）修改对外开放的端口，修改为规划端口
（3）其他配置均无需修改
二、部署Prometheus
2.1 部署Prometheus
执行如下命令部署应用
kubectl apply -f ./
2.2 验证Prometheus
首先在kubernetes后台验证Pod均已正常启动
kubectl get pod -n logging
如下，都为running表示部署OK
浏览器通过ip:port 访问，如下表示安装已经OK了
