附014.Kubernetes Prometheus+Grafana+EFK+Kibana+Glusterfs整合性方案

一 glusterfs存储集群部署

注意：以下为简略步骤，详情参考《附009.Kubernetes永久存储之GlusterFS独立部署》。

1.1 架构示意

略

1.2 相关规划

主机	IP	磁盘	备注
k8smaster01	172.24.8.71	——	Kubernetes Master节点 Heketi主机
k8smaster02	172.24.8.72	——	Kubernetes Master节点 Heketi主机
k8smaster03	172.24.8.73	——	Kubernetes Master节点 Heketi主机
k8snode01	172.24.8.74	sdb	Kubernetes Worker节点 glusterfs 01节点
k8snode02	172.24.8.75	sdb	Kubernetes Worker节点 glusterfs 02节点
k8snode03	172.24.8.76	sdb	Kubernetes Worker节点 glusterfs 03节点

提示：本规划直接使用裸磁盘完成。

1.3 安装glusterfs

# yum -y install centos-release-gluster

# yum -y install glusterfs-server

# systemctl start glusterd

# systemctl enable glusterd

提示：建议所有节点安装。

1.4 添加信任池

[root@k8snode01 ~]# gluster peer probe k8snode02

[root@k8snode01 ~]# gluster peer probe k8snode03

[root@k8snode01 ~]# gluster peer status #查看信任池状态

[root@k8snode01 ~]# gluster pool list #查看信任池列表

提示：仅需要在glusterfs任一节点执行一次即可。

1.5 安装heketi

[root@k8smaster01 ~]# yum -y install heketi heketi-client

1.6 配置heketi

[root@k8smaster01 ~]# vi /etc/heketi/heketi.json

 {
   "_port_comment": "Heketi Server Port Number",
   "port": "",

   "_use_auth": "Enable JWT authorization. Please enable for deployment",
   "use_auth": true,

   "_jwt": "Private keys for access",
   "jwt": {
     "_admin": "Admin has access to all APIs",
     "admin": {
       "key": "admin123"
     },
     "_user": "User only has access to /volumes endpoint",
     "user": {
       "key": "xianghy"
     }
   },

   "_glusterfs_comment": "GlusterFS Configuration",
   "glusterfs": {
     "_executor_comment": [
       "Execute plugin. Possible choices: mock, ssh",
       "mock: This setting is used for testing and development.",
       "      It will not send commands to any node.",
       "ssh:  This setting will notify Heketi to ssh to the nodes.",
       "      It will need the values in sshexec to be configured.",
       "kubernetes: Communicate with GlusterFS containers over",
       "            Kubernetes exec api."
     ],
     "executor": "ssh",

     "_sshexec_comment": "SSH username and private key file information",
     "sshexec": {
       "keyfile": "/etc/heketi/heketi_key",
       "user": "root",
       "port": "",
       "fstab": "/etc/fstab"
     },

     "_db_comment": "Database file name",
     "db": "/var/lib/heketi/heketi.db",

     "_loglevel_comment": [
       "Set log level. Choices are:",
       "  none, critical, error, warning, info, debug",
       "Default is warning"
     ],
     "loglevel" : "warning"
   }
 }

 

1.7 配置免秘钥

[root@k8smaster01 ~]# ssh-keygen -t rsa -q -f /etc/heketi/heketi_key -N ""

[root@k8smaster01 ~]# chown heketi:heketi /etc/heketi/heketi_key

[root@k8smaster01 ~]# ssh-copy-id -i /etc/heketi/heketi_key.pub root@k8snode01

[root@k8smaster01 ~]# ssh-copy-id -i /etc/heketi/heketi_key.pub root@k8snode02

[root@k8smaster01 ~]# ssh-copy-id -i /etc/heketi/heketi_key.pub root@k8snode03

1.8 启动heketi

[root@k8smaster01 ~]# systemctl enable heketi.service

[root@k8smaster01 ~]# systemctl start heketi.service

[root@k8smaster01 ~]# systemctl status heketi.service

[root@k8smaster01 ~]# curl http://localhost:8080/hello #测试访问

1.9 配置Heketi拓扑

[root@k8smaster01 ~]# vi /etc/heketi/topology.json

 {
   "clusters": [
     {
       "nodes": [
         {
           "node": {
             "hostnames": {
               "manage": [
                 "k8snode01"
               ],
               "storage": [
                 "172.24.8.74"
               ]
             },
             "zone": 1
           },
           "devices": [
             "/dev/sdb"
           ]
         },
         {
           "node": {
             "hostnames": {
               "manage": [
                 "k8snode02"
               ],
               "storage": [
                 "172.24.8.75"
               ]
             },
             "zone": 1
           },
           "devices": [
             "/dev/sdb"
           ]
         },
         {
           "node": {
             "hostnames": {
               "manage": [
                 "k8snode03"
               ],
               "storage": [
                 "172.24.8.76"
               ]
             },
             "zone": 1
           },
           "devices": [
             "/dev/sdb"
           ]
         }
       ]
     }
   ]
 }

 

[root@k8smaster01 ~]# echo "export HEKETI_CLI_SERVER=http://k8smaster01:8080" >> /etc/profile.d/heketi.sh

[root@k8smaster01 ~]# echo "alias heketi-cli='heketi-cli --user admin --secret admin123'" >> .bashrc

[root@k8smaster01 ~]# source /etc/profile.d/heketi.sh

[root@k8smaster01 ~]# source .bashrc

[root@k8smaster01 ~]# echo $HEKETI_CLI_SERVER

http://k8smaster01:8080

[root@k8smaster01 ~]# heketi-cli --server $HEKETI_CLI_SERVER --user admin --secret admin123 topology load --json=/etc/heketi/topology.json

1.10 集群管理及测试

[root@heketi ~]# heketi-cli cluster list #集群列表

[root@heketi ~]# heketi-cli node list #卷信息

[root@heketi ~]# heketi-cli volume list #卷信息

[root@k8snode01 ~]# gluster volume info #通过glusterfs节点查看

1.11 创建StorageClass

[root@k8smaster01 study]# vi heketi-secret.yaml

 apiVersion: v1
 kind: Secret
 metadata:
   name: heketi-secret
   namespace: heketi
 data:
   key: YWRtaW4xMjM=
 type: kubernetes.io/glusterfs

 

[root@k8smaster01 study]# kubectl create ns heketi

[root@k8smaster01 study]# kubectl create -f heketi-secret.yaml #创建heketi

[root@k8smaster01 study]# kubectl get secrets -n heketi

[root@k8smaster01 study]# vim gluster-heketi-storageclass.yaml #正式创建StorageClass

 apiVersion: storage.k8s.io/v1
 kind: StorageClass
 metadata:
   name: ghstorageclass
 parameters:
   resturl: "http://172.24.8.71:8080"
   clusterid: "ad0f81f75f01d01ebd6a21834a2caa30"
   restauthenabled: "true"
   restuser: "admin"
   secretName: "heketi-secret"
   secretNamespace: "heketi"
   volumetype: "replicate:3"
 provisioner: kubernetes.io/glusterfs
 reclaimPolicy: Delete

 

[root@k8smaster01 study]# kubectl create -f gluster-heketi-storageclass.yaml

注意：storageclass资源创建后不可变更，如修改只能删除后重建。

[root@k8smaster01 heketi]# kubectl get storageclasses #查看确认

NAME PROVISIONER AGE

gluster-heketi-storageclass kubernetes.io/glusterfs 85s

[root@k8smaster01 heketi]# kubectl describe storageclasses ghstorageclass

 

二 集群监控Metrics

注意：以下为简略步骤，详情参考《049.集群管理-集群监控Metrics》。

2.1 开启聚合层

开机聚合层功能，使用kubeadm默认已开启此功能，可如下查看验证。

[root@k8smaster01 ~]# cat /etc/kubernetes/manifests/kube-apiserver.yaml

2.2 获取部署文件

[root@k8smaster01 ~]# git clone https://github.com/kubernetes-incubator/metrics-server.git

[root@k8smaster01 ~]# cd metrics-server/deploy/1.8+/

[root@k8smaster01 1.8+]# vi metrics-server-deployment.yaml

 ……
         image: mirrorgooglecontainers/metrics-server-amd64:v0.3.6	#修改为国内源
         command:
         - /metrics-server
         - --metric-resolution=30s
         - --kubelet-insecure-tls
         - --kubelet-preferred-address-types=InternalIP,Hostname,InternalDNS,ExternalDNS,ExternalIP	#添加如上command
 ……

 

2.3 正式部署

[root@k8smaster01 1.8+]# kubectl apply -f .

[root@k8smaster01 1.8+]# kubectl -n kube-system get pods -l k8s-app=metrics-server

[root@k8smaster01 1.8+]# kubectl -n kube-system logs -l k8s-app=metrics-server -f #可查看部署日志

2.4 确认验证

[root@k8smaster01 ~]# kubectl top nodes

[root@k8smaster01 ~]# kubectl top pods --all-namespaces

 

三 Prometheus部署

注意：以下为简略步骤，详情参考《050.集群管理-Prometheus+Grafana监控方案》。

3.1 获取部署文件

[root@k8smaster01 ~]# git clone https://github.com/prometheus/prometheus

3.2 创建命名空间

[root@k8smaster01 ~]# cd prometheus/documentation/examples/

[root@k8smaster01 examples]# vi monitor-namespace.yaml

 apiVersion: v1
 kind: Namespace
 metadata:
   name: monitoring

[root@k8smaster01 examples]# kubectl create -f monitor-namespace.yaml

3.3 创建RBAC

[root@k8smaster01 examples]# vi rbac-setup.yml

 apiVersion: rbac.authorization.k8s.io/v1beta1
 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: monitoring               #仅需修改命名空间
 ---
 apiVersion: rbac.authorization.k8s.io/v1beta1
 kind: ClusterRoleBinding
 metadata:
   name: prometheus
 roleRef:
   apiGroup: rbac.authorization.k8s.io
   kind: ClusterRole
   name: prometheus
 subjects:
 - kind: ServiceAccount
   name: prometheus
   namespace: monitoring              #仅需修改命名空间

[root@k8smaster01 examples]# kubectl create -f rbac-setup.yml

3.4 创建Prometheus ConfigMap

[root@k8smaster01 examples]# cat prometheus-kubernetes.yml | grep -v ^$ | grep -v "#" >> prometheus-config.yaml

[root@k8smaster01 examples]# vi prometheus-config.yaml

 apiVersion: v1
 kind: ConfigMap
 metadata:
   name: prometheus-server-conf
   labels:
     name: prometheus-server-conf
   namespace: monitoring               #修改命名空间
 ……

[root@k8smaster01 examples]# kubectl create -f prometheus-config.yaml

3.5 创建持久PVC

[root@k8smaster01 examples]# vi prometheus-pvc.yaml

 apiVersion: v1
 kind: PersistentVolumeClaim
 metadata:
   name: prometheus-pvc
   namespace: monitoring
   annotations:
     volume.beta.kubernetes.io/storage-class: ghstorageclass
 spec:
   accessModes:
   - ReadWriteMany
   resources:
     requests:
       storage: 5Gi

[root@k8smaster01 examples]# kubectl create -f prometheus-pvc.yaml

3.6 Prometheus部署

[root@k8smaster01 examples]# vi prometheus-deployment.yml

 apiVersion: apps/v1beta2
 kind: Deployment
 metadata:
   labels:
     name: prometheus-deployment
   name: prometheus-server
   namespace: monitoring
 spec:
   replicas: 1
   selector:
     matchLabels:
       app: prometheus-server
   template:
     metadata:
       labels:
         app: prometheus-server
     spec:
       containers:
         - name: prometheus-server
           image: prom/prometheus:v2.14.0
           command:
           - "/bin/prometheus"
           args:
             - "--config.file=/etc/prometheus/prometheus.yml"
             - "--storage.tsdb.path=/prometheus/"
             - "--storage.tsdb.retention=72h"
           ports:
             - containerPort: 9090
               protocol: TCP
           volumeMounts:
             - name: prometheus-config-volume
               mountPath: /etc/prometheus/
             - name: prometheus-storage-volume
               mountPath: /prometheus/
       serviceAccountName: prometheus
       imagePullSecrets:
         - name: regsecret
       volumes:
         - name: prometheus-config-volume
           configMap:
             defaultMode: 420
             name: prometheus-server-conf
         - name: prometheus-storage-volume
           persistentVolumeClaim:
             claimName: prometheus-pvc

[root@k8smaster01 examples]# kubectl create -f prometheus-deployment.yml

3.7 创建Prometheus Service

[root@k8smaster01 examples]# vi prometheus-service.yaml

 apiVersion: v1
 kind: Service
 metadata:
   labels:
     app: prometheus-service
   name: prometheus-service
   namespace: monitoring
 spec:
   type: NodePort
   selector:
     app: prometheus-server
   ports:
     - port: 9090
       targetPort: 9090
       nodePort: 30001

[root@k8smaster01 examples]# kubectl create -f prometheus-service.yaml

[root@k8smaster01 examples]# kubectl get all -n monitoring

3.8 确认验证Prometheus

浏览器直接访问：http://172.24.8.100:30001/

 

四 部署grafana

注意：以下为简略步骤，详情参考《050.集群管理-Prometheus+Grafana监控方案》。

4.1 获取部署文件

[root@k8smaster01 ~]# git clone https://github.com/liukuan73/kubernetes-addons

[root@k8smaster01 ~]# cd /root/kubernetes-addons/monitor/prometheus+grafana

4.2 创建持久PVC

[root@k8smaster01 prometheus+grafana]# vi grafana-data-pvc.yaml

 apiVersion: v1
 kind: PersistentVolumeClaim
 metadata:
   name: grafana-data-pvc
   namespace: monitoring
   annotations:
     volume.beta.kubernetes.io/storage-class: ghstorageclass
 spec:
   accessModes:
   - ReadWriteOnce
   resources:
     requests:
       storage: 5Gi

[root@k8smaster01 prometheus+grafana]# kubectl create -f grafana-data-pvc.yaml

4.3 grafana部署

[root@k8smaster01 prometheus+grafana]# vi grafana.yaml

 apiVersion: extensions/v1beta1
 kind: Deployment
 metadata:
   name: monitoring-grafana
   namespace: monitoring
 spec:
   replicas: 1
   template:
     metadata:
       labels:
         task: monitoring
         k8s-app: grafana
     spec:
       containers:
       - name: grafana
         image: grafana/grafana:6.5.0
         imagePullPolicy: IfNotPresent
         ports:
         - containerPort: 3000
           protocol: TCP
         volumeMounts:
         - mountPath: /var/lib/grafana
           name: grafana-storage
         env:
           - name: INFLUXDB_HOST
             value: monitoring-influxdb
           - name: GF_SERVER_HTTP_PORT
             value: ""
           - name: GF_AUTH_BASIC_ENABLED
             value: "false"
           - name: GF_AUTH_ANONYMOUS_ENABLED
             value: "true"
           - name: GF_AUTH_ANONYMOUS_ORG_ROLE
             value: Admin
           - name: GF_SERVER_ROOT_URL
             value: /
         readinessProbe:
           httpGet:
             path: /login
             port: 3000
       volumes:
       - name: grafana-storage
         persistentVolumeClaim:
           claimName: grafana-data-pvc
       nodeSelector:
         node-role.kubernetes.io/master: "true"
       tolerations:
       - key: "node-role.kubernetes.io/master"
         effect: "NoSchedule"
 ---
 apiVersion: v1
 kind: Service
 metadata:
   labels:
     kubernetes.io/cluster-service: 'true'
     kubernetes.io/name: monitoring-grafana
   annotations:
     prometheus.io/scrape: 'true'
     prometheus.io/tcp-probe: 'true'
     prometheus.io/tcp-probe-port: '80'
   name: monitoring-grafana
   namespace: monitoring
 spec:
   type: NodePort
   ports:
   - port: 80
     targetPort: 3000
     nodePort: 30002
   selector:
     k8s-app: grafana

[root@k8smaster01 prometheus+grafana]# kubectl label nodes k8smaster01 node-role.kubernetes.io/master=true

[root@k8smaster01 prometheus+grafana]# kubectl label nodes k8smaster02 node-role.kubernetes.io/master=true

[root@k8smaster01 prometheus+grafana]# kubectl label nodes k8smaster03 node-role.kubernetes.io/master=true

[root@k8smaster01 prometheus+grafana]# kubectl create -f grafana.yaml

[root@k8smaster01 examples]# kubectl get all -n monitoring

4.4 确认验证Prometheus

浏览器直接访问：http://172.24.8.100:30002/

4.4 grafana配置

• 添加数据源：略
• 创建用户：略

提示：所有grafana配置可配置参考：https://grafana.com/docs/grafana/latest/installation/configuration/。

4.5 查看监控

浏览器再次访问：http://172.24.8.100:30002/