参照官方的教程，Prometheus Operator组件的安装过程并不复杂，但需要注意Prometheus、Alertmanager、grafana服务数据持久化问题，默认配置使用的都是emptyDir,生产环境应换成持久化卷。
这里我使用Ceph作为持久化卷，关于Ceph的安装可以参见：使用Rook在Kubernetes集群中快速搭建Ceph集群
查看StorageClass
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➜ ~ kubectl get sc
NAME PROVISIONER AGE
rook-ceph-block rook-ceph.rbd.csi.ceph.com 26d
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获取安装文件
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git clone https://github.com/coreos/kube-prometheus
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修改配置，增加数据持久化参数
Grafana
创建pvc
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apiVersion: v1
kind: PersistentVolumeClaim
metadata:
name: grafana-storage
namespace: monitoring
spec:
accessModes:
- ReadWriteOnce
resources:
requests:
storage: 10Gi
storageClassName: rook-ceph-block
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修改配置文件
vim grafana-deployment.yaml
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apiVersion: apps/v1
kind: Deployment
metadata:
labels:
app: grafana
name: grafana
namespace: monitoring
spec:
replicas: 1
selector:
matchLabels:
app: grafana
template:
metadata:
labels:
app: grafana
spec:
#处理目录权限问题
initContainers:
- name: volume-mount-hack
image: busybox
command: ["sh", "-c", "chown -R 65534:65534 /hack"]
volumeMounts:
- name: grafana-storage
mountPath: /hack
securityContext:
privileged: true
containers:
- image: grafana/grafana:6.4.3
name: grafana
ports:
- containerPort: 3000
name: http
readinessProbe:
httpGet:
path: /api/health
port: http
resources:
limits:
cpu: 200m
memory: 200Mi
requests:
cpu: 100m
memory: 100Mi
securityContext:
runAsNonRoot: true
runAsUser: 65534
volumeMounts:
- mountPath: /var/lib/grafana
name: grafana-storage
readOnly: false
- mountPath: /etc/grafana/provisioning/datasources
name: grafana-datasources
readOnly: false
- mountPath: /etc/grafana/provisioning/dashboards
name: grafana-dashboards
readOnly: false
- mountPath: /grafana-dashboard-definitions/0/apiserver
name: grafana-dashboard-apiserver
readOnly: false
- mountPath: /grafana-dashboard-definitions/0/cluster-total
name: grafana-dashboard-cluster-total
readOnly: false
- mountPath: /grafana-dashboard-definitions/0/controller-manager
name: grafana-dashboard-controller-manager
readOnly: false
- mountPath: /grafana-dashboard-definitions/0/k8s-resources-cluster
name: grafana-dashboard-k8s-resources-cluster
readOnly: false
- mountPath: /grafana-dashboard-definitions/0/k8s-resources-namespace
name: grafana-dashboard-k8s-resources-namespace
readOnly: false
- mountPath: /grafana-dashboard-definitions/0/k8s-resources-node
name: grafana-dashboard-k8s-resources-node
readOnly: false
- mountPath: /grafana-dashboard-definitions/0/k8s-resources-pod
name: grafana-dashboard-k8s-resources-pod
readOnly: false
- mountPath: /grafana-dashboard-definitions/0/k8s-resources-workload
name: grafana-dashboard-k8s-resources-workload
readOnly: false
- mountPath: /grafana-dashboard-definitions/0/k8s-resources-workloads-namespace
name: grafana-dashboard-k8s-resources-workloads-namespace
readOnly: false
- mountPath: /grafana-dashboard-definitions/0/kubelet
name: grafana-dashboard-kubelet
readOnly: false
- mountPath: /grafana-dashboard-definitions/0/namespace-by-pod
name: grafana-dashboard-namespace-by-pod
readOnly: false
- mountPath: /grafana-dashboard-definitions/0/namespace-by-workload
name: grafana-dashboard-namespace-by-workload
readOnly: false
- mountPath: /grafana-dashboard-definitions/0/node-cluster-rsrc-use
name: grafana-dashboard-node-cluster-rsrc-use
readOnly: false
- mountPath: /grafana-dashboard-definitions/0/node-rsrc-use
name: grafana-dashboard-node-rsrc-use
readOnly: false
- mountPath: /grafana-dashboard-definitions/0/nodes
name: grafana-dashboard-nodes
readOnly: false
- mountPath: /grafana-dashboard-definitions/0/persistentvolumesusage
name: grafana-dashboard-persistentvolumesusage
readOnly: false
- mountPath: /grafana-dashboard-definitions/0/pod-total
name: grafana-dashboard-pod-total
readOnly: false
- mountPath: /grafana-dashboard-definitions/0/pods
name: grafana-dashboard-pods
readOnly: false
- mountPath: /grafana-dashboard-definitions/0/prometheus-remote-write
name: grafana-dashboard-prometheus-remote-write
readOnly: false
- mountPath: /grafana-dashboard-definitions/0/prometheus
name: grafana-dashboard-prometheus
readOnly: false
- mountPath: /grafana-dashboard-definitions/0/proxy
name: grafana-dashboard-proxy
readOnly: false
- mountPath: /grafana-dashboard-definitions/0/scheduler
name: grafana-dashboard-scheduler
readOnly: false
- mountPath: /grafana-dashboard-definitions/0/statefulset
name: grafana-dashboard-statefulset
readOnly: false
- mountPath: /grafana-dashboard-definitions/0/workload-total
name: grafana-dashboard-workload-total
readOnly: false
nodeSelector:
beta.kubernetes.io/os: linux
serviceAccountName: grafana
volumes:
- name: grafana-storage
persistentVolumeClaim:
#刚创建的pvc
claimName: grafana-storage
- name: grafana-datasources
secret:
secretName: grafana-datasources
- configMap:
name: grafana-dashboards
name: grafana-dashboards
- configMap:
name: grafana-dashboard-apiserver
name: grafana-dashboard-apiserver
- configMap:
name: grafana-dashboard-cluster-total
name: grafana-dashboard-cluster-total
- configMap:
name: grafana-dashboard-controller-manager
name: grafana-dashboard-controller-manager
- configMap:
name: grafana-dashboard-k8s-resources-cluster
name: grafana-dashboard-k8s-resources-cluster
- configMap:
name: grafana-dashboard-k8s-resources-namespace
name: grafana-dashboard-k8s-resources-namespace
- configMap:
name: grafana-dashboard-k8s-resources-node
name: grafana-dashboard-k8s-resources-node
- configMap:
name: grafana-dashboard-k8s-resources-pod
name: grafana-dashboard-k8s-resources-pod
- configMap:
name: grafana-dashboard-k8s-resources-workload
name: grafana-dashboard-k8s-resources-workload
- configMap:
name: grafana-dashboard-k8s-resources-workloads-namespace
name: grafana-dashboard-k8s-resources-workloads-namespace
- configMap:
name: grafana-dashboard-kubelet
name: grafana-dashboard-kubelet
- configMap:
name: grafana-dashboard-namespace-by-pod
name: grafana-dashboard-namespace-by-pod
- configMap:
name: grafana-dashboard-namespace-by-workload
name: grafana-dashboard-namespace-by-workload
- configMap:
name: grafana-dashboard-node-cluster-rsrc-use
name: grafana-dashboard-node-cluster-rsrc-use
- configMap:
name: grafana-dashboard-node-rsrc-use
name: grafana-dashboard-node-rsrc-use
- configMap:
name: grafana-dashboard-nodes
name: grafana-dashboard-nodes
- configMap:
name: grafana-dashboard-persistentvolumesusage
name: grafana-dashboard-persistentvolumesusage
- configMap:
name: grafana-dashboard-pod-total
name: grafana-dashboard-pod-total
- configMap:
name: grafana-dashboard-pods
name: grafana-dashboard-pods
- configMap:
name: grafana-dashboard-prometheus-remote-write
name: grafana-dashboard-prometheus-remote-write
- configMap:
name: grafana-dashboard-prometheus
name: grafana-dashboard-prometheus
- configMap:
name: grafana-dashboard-proxy
name: grafana-dashboard-proxy
- configMap:
name: grafana-dashboard-scheduler
name: grafana-dashboard-scheduler
- configMap:
name: grafana-dashboard-statefulset
name: grafana-dashboard-statefulset
- configMap:
name: grafana-dashboard-workload-total
name: grafana-dashboard-workload-total
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Prometheus
vim prometheus-prometheus.yaml
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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
serviceAccountName: prometheus-k8s
serviceMonitorNamespaceSelector: {}
serviceMonitorSelector: {}
version: v2.11.0
storage:
volumeClaimTemplate:
spec:
storageClassName: rook-ceph-block
accessModes: ["ReadWriteOnce"]
resources:
requests:
storage: 10Gi
#storage.tsdb.retention.time 数据保留时间
retention: 1y
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Alertmanager
vim alertmanager-alertmanager.yaml
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apiVersion: monitoring.coreos.com/v1
kind: Alertmanager
metadata:
labels:
alertmanager: main
name: main
namespace: monitoring
spec:
baseImage: quay.io/prometheus/alertmanager
nodeSelector:
kubernetes.io/os: linux
replicas: 3
securityContext:
fsGroup: 2000
runAsNonRoot: true
runAsUser: 1000
serviceAccountName: alertmanager-main
version: v0.18.0
storage:
volumeClaimTemplate:
spec:
storageClassName: rook-ceph-block
accessModes: ["ReadWriteOnce"]
resources:
requests:
storage: 10Gi
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安装
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kubectl create -f manifests/setup
kubectl create -f manifests/
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验证
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➜ ~ kubectl -n monitoring get pods
NAME READY STATUS RESTARTS AGE
alertmanager-main-0 2/2 Running 0 165m
alertmanager-main-1 2/2 Running 0 165m
alertmanager-main-2 2/2 Running 0 165m
grafana-789555c8fd-gpxdd 1/1 Running 0 165m
kube-state-metrics-7f6d7b46b4-wrsvb 3/3 Running 0 165m
node-exporter-4rj94 2/2 Running 0 165m
node-exporter-djtqz 2/2 Running 0 165m
node-exporter-nrnck 2/2 Running 0 165m
node-exporter-rvkp7 2/2 Running 0 165m
node-exporter-tthcm 2/2 Running 0 165m
node-exporter-vz282 2/2 Running 0 165m
prometheus-adapter-68698bc948-ssmcd 1/1 Running 0 165m
prometheus-k8s-0 3/3 Running 1 165m
prometheus-k8s-1 3/3 Running 1 165m
prometheus-operator-6685db5c6-q7rv5 1/1 Running 0 167m
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端口转发
kubectl -n monitoring port-forward svc/grafana 3000
访问grafana
http://localhost:3000/
参考
https://github.com/coreos/prometheus-operator/blob/master/Documentation/api.md#storagespec