k8s+prometheus+grafana集群监控
2020-09-08
k8s+prometheus+grafana集群监控
操作系统：Centos 7.6 64bit
k8s-master：192.168.191.133
k8s-node1：192.168.191.134
k8s-node2：192.168.191.135
k8s部署过程参考另一篇文档：https://www.jianshu.com/p/ff61bb4832c2
在master和node上下载监控所需镜像
docker pull prom/node-exporter
docker pull prom/prometheus:v2.0.0
docker pull grafana/grafana:4.2.0
用daemonset方式部署 node-exporter 组件
以下操作在k8s 1.14 上无误，其他版本不能保证
（在master上操作）
[root@k8s-master ~]# mkdir /root/k8s-prometheus
[root@k8s-master ~]# cd /root/k8s-prometheus
[root@k8s-master ~]# vim node-exporter.yaml
---
apiVersion: extensions/v1beta1
kind: DaemonSet
metadata:
name: node-exporter
namespace: kube-system
labels:
k8s-app: node-exporter
spec:
template:
metadata:
labels:
k8s-app: node-exporter
spec:
containers:
- image: prom/node-exporter
name: node-exporter
ports:
- containerPort: 9100
protocol: TCP
name: http
---
apiVersion: v1
kind: Service
metadata:
labels:
k8s-app: node-exporter
name: node-exporter
namespace: kube-system
spec:
ports:
- name: http
port: 9100
nodePort: 31672
protocol: TCP
type: NodePort
selector:
k8s-app: node-exporter
[root@k8s-master ~]# kubectl apply -f node-exporter.yaml
部署prometheus组件
[root@k8s-master ~]# vim rbac-setup.yaml
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: kube-system
---
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: kube-system
[root@k8s-master ~]# kubectl apply -f rbac-setup.yaml
以configmap的形式管理prometheus组件的配置文件
[root@k8s-master ~]# vim configmap.yaml
apiVersion: v1
kind: ConfigMap
metadata:
name: prometheus-config
namespace: kube-system
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
[root@k8s-master ~]# kubectl apply -f prometheus/configmap.yaml
[root@k8s-master ~]# vim prometheus.deploy.yml
---
apiVersion: apps/v1beta2
kind: Deployment
metadata:
labels:
name: prometheus-deployment
name: prometheus
namespace: kube-system
spec:
replicas: 1
selector:
matchLabels:
app: prometheus
template:
metadata:
labels:
app: prometheus
spec:
containers:
- image: prom/prometheus:v2.0.0
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
resources:
requests:
cpu: 100m
memory: 100Mi
limits:
cpu: 500m
memory: 2500Mi
serviceAccountName: prometheus
volumes:
- name: data
emptyDir: {}
- name: config-volume
configMap:
name: prometheus-config
[root@k8s-master ~]# kubectl apply -f prometheus.deploy.yml
[root@k8s-master ~]# vim prometheus.svc.yml
---
kind: Service
apiVersion: v1
metadata:
labels:
app: prometheus
name: prometheus
namespace: kube-system
spec:
type: NodePort
ports:
- port: 9090
targetPort: 9090
nodePort: 30003
selector:
app: prometheus
[root@k8s-master ~]# kubectl apply -f prometheus.svc.yml
部署 grafana 组件
[root@k8s-master ~]# mkdir /root/grafana
[root@k8s-master ~]# cd /root/grafana
[root@k8s-master ~]# vim grafana-deploy.yaml
apiVersion: extensions/v1beta1
kind: Deployment
metadata:
name: grafana-core
namespace: kube-system
labels:
app: grafana
component: core
spec:
replicas: 1
template:
metadata:
labels:
app: grafana
component: core
spec:
containers:
- image: grafana/grafana:4.2.0
name: grafana-core
imagePullPolicy: IfNotPresent
# env:
resources:
# keep request = limit to keep this container in guaranteed class
limits:
cpu: 100m
memory: 100Mi
requests:
cpu: 100m
memory: 100Mi
env:
# The following env variables set up basic auth twith the default admin user and admin password.
- name: GF_AUTH_BASIC_ENABLED
value: "true"
- name: GF_AUTH_ANONYMOUS_ENABLED
value: "false"
# - name: GF_AUTH_ANONYMOUS_ORG_ROLE
# value: Admin
# does not really work, because of template variables in exported dashboards:
# - name: GF_DASHBOARDS_JSON_ENABLED
# value: "true"
readinessProbe:
httpGet:
path: /login
port: 3000
# initialDelaySeconds: 30
# timeoutSeconds: 1
volumeMounts:
- name: grafana-persistent-storage
mountPath: /var
volumes:
- name: grafana-persistent-storage
emptyDir: {}
[root@k8s-master ~]# kubectl create -f grafana-deploy.yaml
[root@k8s-master ~]# vim grafana-svc.yaml
apiVersion: v1
kind: Service
metadata:
name: grafana
namespace: kube-system
labels:
app: grafana
component: core
spec:
type: NodePort
ports:
- port: 3000
selector:
app: grafana
component: core
[root@k8s-master ~]# kubectl create -f grafana-svc.yaml
[root@k8s-master ~]# vim grafana-ing.yaml
apiVersion: extensions/v1beta1
kind: Ingress
metadata:
name: grafana
namespace: kube-system
spec:
rules:
- host: k8s.grafana
http:
paths:
- path: /
backend:
serviceName: grafana
servicePort: 3000
[root@k8s-master ~]# kubectl create -f grafana-ing.yaml
[root@k8s-master ~]# kubectl get pods -n kube-system -o wide
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES
coredns-8686dcc4fd-bcqsm 1/1 Running 0 5d1h 10.244.0.3 k8s-master <none> <none>
coredns-8686dcc4fd-twm87 1/1 Running 0 5d1h 10.244.0.2 k8s-master <none> <none>
etcd-k8s-master 1/1 Running 0 5d1h 192.168.191.133 k8s-master <none> <none>
grafana-core-5f7c6c786b-zh24d 1/1 Running 0 4h33m 10.244.2.5 k8s-node2 <none> <none>
kube-apiserver-k8s-master 1/1 Running 0 5d1h 192.168.191.133 k8s-master <none> <none>
kube-controller-manager-k8s-master 1/1 Running 2 5d1h 192.168.191.133 k8s-master <none> <none>
kube-flannel-ds-amd64-cc54r 1/1 Running 0 4d1h 192.168.191.135 k8s-node2 <none> <none>
kube-flannel-ds-amd64-mpqv8 1/1 Running 0 4d2h 192.168.191.134 k8s-node1 <none> <none>
kube-flannel-ds-amd64-whlnx 1/1 Running 0 4d6h 192.168.191.133 k8s-master <none> <none>
kube-proxy-6dhq8 1/1 Running 0 5d1h 192.168.191.133 k8s-master <none> <none>
kube-proxy-cmkbm 1/1 Running 0 4d2h 192.168.191.134 k8s-node1 <none> <none>
kube-proxy-f9lk5 1/1 Running 0 4d1h 192.168.191.135 k8s-node2 <none> <none>
kube-scheduler-k8s-master 1/1 Running 2 5d1h 192.168.191.133 k8s-master <none> <none>
kubernetes-dashboard-5bbc9b8dd-2bz5z 1/1 Running 0 28h 10.244.1.3 k8s-node1 <none> <none>
kuboard-5d77595c6f-s85wl 1/1 Running 0 24h 10.244.2.3 k8s-node2 <none> <none>
metrics-server-6dcdfdfbd5-hbwxq 1/1 Running 0 24h 192.168.191.135 k8s-node2 <none> <none>
node-exporter-d5lz5 1/1 Running 0 4h38m 10.244.2.4 k8s-node2 <none> <none>
node-exporter-xc5f2 1/1 Running 0 4h38m 10.244.1.4 k8s-node1 <none> <none>
prometheus-6b96dcbd87-lkmbg 1/1 Running 0 4h34m 10.244.1.5 k8s-node1 <none> <none>
[root@k8s-master ~]# kubectl get svc -n kube-system -o wide
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE SELECTOR
grafana NodePort 10.1.23.40 <none> 3000:31142/TCP 4h32m app=grafana,component=core
kube-dns ClusterIP 10.1.0.10 <none> 53/UDP,53/TCP,9153/TCP 5d1h k8s-app=kube-dns
kubernetes-dashboard NodePort 10.1.211.192 <none> 443:30001/TCP 3d23h k8s-app=kubernetes-dashboard
kuboard NodePort 10.1.247.151 <none> 80:32567/TCP 24h k8s.kuboard.cn/layer=monitor,k8s.kuboard.cn/name=kuboard
metrics-server ClusterIP 10.1.127.109 <none> 443/TCP 24h k8s-app=metrics-server
node-exporter NodePort 10.1.235.139 <none> 9100:31672/TCP 4h38m k8s-app=node-exporter
prometheus NodePort 10.1.226.173 <none> 9090:30003/TCP 4h34m app=prometheus
通过执行以上两条命令查看node-exporter的端口和运行在哪个节点
浏览器：http://192.168.191.134:31672/metrics
cc1.png
查看prometheus与k8s集群的apiserver的连接情况
浏览器：http://192.168.191.134:30003/targets
cc2.png
登录grafana
浏览器：http://192.168.191.135:31142
用户密码均为admin
cc3.png
配置数据源为prometheus
cc4.png
cc5.png
出现绿色的success这一步就成功了
导入prometheus的模板
cc6.png
输入315即可极速导模板
cc7.png
cc8.png
cc9.png
搞定
本章原创，转载请注明出处！！
作者:肉包君
原文链接:https://www.jianshu.com/p/a1dcf76bbba1