部署方案
Docker+Kubernetes
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Grafana部署
grafana主要用于提供WEB界面，对promethus收集的指标信息进行可视化展示。
所以通过NodePort类型部署Service。
deployment
apiVersion: extensions/v1beta1
kind: Deployment
metadata:
name: grafana-core
namespace: t-paas
labels:
app: grafana
component: core
spec:
replicas: 1
template:
metadata:
labels:
app: grafana
component: core
spec:
containers:
- image: grafana/grafana:6.5.0
name: grafana-core
imagePullPolicy: IfNotPresent
ports:
- containerPort: 3000
protocol: TCP
env:
- name: GF_SECURITY_ADMIN_PASSWORD
value: "admin"
readinessProbe:
httpGet:
path: /login
port: 3000
volumeMounts:
- name: grafana-persistent-storage
mountPath: /var/lib/grafana
volumes:
- name: grafana-persistent-storage
emptyDir: {}
service
apiVersion: v1
kind: Service
metadata:
name: grafana-svc
namespace: t-paas
labels:
app: grafana
component: core
spec:
type: NodePort
ports:
- port: 3000
targetPort: 3000
nodePort: 30000
selector:
app: grafana
component: core
Prometheus部署
Prometheus主要通过拉的方式收集指标信息。
configmap
收集对象需要在prometheus应用的prometheus.yml文件进行配置。
在k8s中，可以将配置文件定义在configmap中，通过volumne方式，挂载到应用容器中。
在该prometheus.yml文件中，主要配置对kubernetes中的组件及部署的服务，容器等进行监控。
apiVersion: v1
kind: ConfigMap
metadata:
name: prometheus-config
namespace: t-paas
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
rbac
为promethues应用创建角色及分配权限。
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: t-paas
---
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: t-paas
deploy
部署prometheus应用，可以通过9090端口访问收集到的指标数据信息。
---
apiVersion: apps/v1beta2
kind: Deployment
metadata:
labels:
name: prometheus-deployment
name: prometheus
namespace: t-paas
spec:
replicas: 1
selector:
matchLabels:
app: prometheus
template:
metadata:
labels:
app: prometheus
spec:
containers:
- image: prom/prometheus:v2.15.0
name: prometheus
command:
- "/bin/prometheus"
args:
- "--config.file=/etc/prometheus/prometheus.yml"
- "--storage.tsdb.path=/prometheus"
- "--storage.tsdb.retention=24h"
ports:
- containerPort: 9090
protocol: TCP
volumeMounts:
- mountPath: "/prometheus"
name: data
- mountPath: "/etc/prometheus"
name: config-volume
serviceAccountName: prometheus
volumes:
- name: data
emptyDir: {}
- name: config-volume
configMap:
name: prometheus-config
service
kind: Service
apiVersion: v1
metadata:
labels:
app: prometheus
name: prometheus-svc
namespace: t-paas
spec:
ports:
- name: p9090
port: 9090
targetPort: 9090
selector:
app: prometheus
Exporter部署
部署node-exporter 收集主机中部署的k8s指标信息。
depolyment
apiVersion: extensions/v1beta1
kind: DaemonSet
metadata:
name: node-exporter
namespace: t-paas
labels:
k8s-app: node-exporter
spec:
template:
metadata:
labels:
k8s-app: node-exporter
spec:
containers:
- image: prom/node-exporter:v0.18.0
name: node-exporter
ports:
- containerPort: 9100
protocol: TCP
name: http
service
apiVersion: v1
kind: Service
metadata:
labels:
k8s-app: node-exporter
name: node-exporter
namespace: t-paas
spec:
ports:
- name: p9100
port: 9100
targetPort: 9100
selector:
k8s-app: node-exporter
启动
按照以下顺序启动各服务
#node-exporter
kubectl create -f /gpe/exporter/node-exporter-deployment.yaml
kubectl create -f /gpe/exporter/node-exporter-service.yaml
#prometheus组件
kubectl create -f /gpe/prometheus/rbac-setup.yaml
kubectl create -f /gpe/prometheus/configmap.yaml
kubectl create -f /gpe/prometheus/prometheus.deploy.yml
kubectl create -f /gpe/prometheus/prometheus.svc.yml
#安装 组件
kubectl create -f /gpe/grafana/grafana-deploy.yaml
kubectl create -f /gpe/grafana/grafana-svc.yaml
配置
-
访问grafana http://ip:30000（默认用户密码 admin admin）
-
配置grafana 数据源为prometheus
配置grafana 数据源为prometheus
-
导入dashboard面板
导入监控模板
-
配置模板数据源
配置模板数据源
-
查看grafana 监控图标
查看grafana 监控图标
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