上传文件至 'kubernetes-MD'
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<h1><center>基于Kubernetes集群构建ES集群</center></h1>
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作者：行癫（盗版必究）
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------
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## 一：环境准备
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#### 1.Kubernetes集群环境
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| 节点 | 地址 |
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| :---------------: | :---------: |
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| Kubernetes-Master | 10.9.12.206 |
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| Kubernetes-Node-1 | 10.9.12.205 |
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| Kubernetes-Node-2 | 10.9.12.204 |
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| Kubernetes-Node-3 | 10.9.12.203 |
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| DNS服务器 | 10.9.12.210 |
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| 代理服务器 | 10.9.12.209 |
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| NFS存储 | 10.9.12.250 |
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#### 2.Kuboard集群管理
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## 二：构建ES集群
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#### 1.持久化存储构建
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1.NFS服务器部署
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略
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2.创建共享目录
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本次采用脚本创建，脚本如下
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```shell
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[root@xingdiancloud-1 ~]# cat nfs.sh
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#!/bin/bash
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read -p "请输入您要创建的共享目录：" dir
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if [ -d $dir ];then
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echo "请重新输入共享目录: "
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read again_dir
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mkdir $again_dir -p
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echo "共享目录创建成功"
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read -p "请输入共享对象：" ips
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echo "$again_dir ${ips}(rw,sync,no_root_squash)" >> /etc/exports
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xingdian=`cat /etc/exports |grep "$again_dir" |wc -l`
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if [ $xingdian -eq 1 ];then
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echo "成功配置共享"
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exportfs -rv >/dev/null
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exit
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else
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exit
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fi
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else
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mkdir $dir -p
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echo "共享目录创建成功"
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read -p "请输入共享对象：" ips
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echo "$dir ${ips}(rw,sync,no_root_squash)" >> /etc/exports
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xingdian=`cat /etc/exports |grep "$dir" |wc -l`
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if [ $xingdian -eq 1 ];then
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echo "成功配置共享"
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exportfs -rv >/dev/null
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exit
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else
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exit
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fi
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fi
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```
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3.创建存储类
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```yaml
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[root@xingdiancloud-master ~]# vim namespace.yaml
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apiVersion: v1
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kind: Namespace
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metadata:
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name: logging
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[root@xingdiancloud-master ~]# vim storageclass.yaml
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apiVersion: storage.k8s.io/v1
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kind: StorageClass
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metadata:
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annotations:
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k8s.kuboard.cn/storageNamespace: logging
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k8s.kuboard.cn/storageType: nfs_client_provisioner
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name: data-es
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parameters:
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archiveOnDelete: 'false'
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provisioner: nfs-data-es
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reclaimPolicy: Retain
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volumeBindingMode: Immediate
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```
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4.创建存储卷
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```yaml
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[root@xingdiancloud-master ~]# vim persistenVolume.yaml
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apiVersion: v1
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kind: PersistentVolume
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metadata:
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annotations:
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pv.kubernetes.io/bound-by-controller: 'yes'
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finalizers:
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- kubernetes.io/pv-protection
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name: nfs-pv-data-es
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spec:
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accessModes:
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- ReadWriteMany
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capacity:
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storage: 100Gi
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claimRef:
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apiVersion: v1
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kind: PersistentVolumeClaim
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name: nfs-pvc-data-es
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namespace: kube-system
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nfs:
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path: /data/es-data
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server: 10.9.12.250
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persistentVolumeReclaimPolicy: Retain
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storageClassName: nfs-storageclass-provisioner
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volumeMode: Filesystem
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```
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注意：存储类和存储卷也可以使用Kuboard界面创建
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#### 2.设定节点标签
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```shell
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[root@xingdiancloud-master ~]# kubectl label nodes xingdiancloud-node-1 es=log
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```
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注意：
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所有运行ES的节点需要进行标签的设定
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目的配合接下来的StatefulSet部署ES集群
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#### 3.ES集群部署
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注意：由于ES集群每个节点需要唯一的网络标识，并需要持久化存储，Deployment不能实现该特点只能进行无状态应用的部署，故本次将采用StatefulSet进行部署。
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```yaml
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apiVersion: apps/v1
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kind: StatefulSet
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metadata:
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name: es
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namespace: logging
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spec:
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serviceName: elasticsearch
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replicas: 3
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selector:
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matchLabels:
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app: elasticsearch
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template:
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metadata:
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labels:
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app: elasticsearch
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spec:
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nodeSelector:
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es: log
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initContainers:
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- name: increase-vm-max-map
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image: busybox
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command: ["sysctl", "-w", "vm.max_map_count=262144"]
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securityContext:
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privileged: true
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- name: increase-fd-ulimit
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image: busybox
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command: ["sh", "-c", "ulimit -n 65536"]
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securityContext:
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privileged: true
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containers:
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- name: elasticsearch
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image: 10.9.12.201/xingdian/es:7.6.2
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ports:
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- name: rest
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containerPort: 9200
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- name: inter
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containerPort: 9300
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resources:
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limits:
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cpu: 500m
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memory: 4000Mi
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requests:
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cpu: 500m
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memory: 3000Mi
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volumeMounts:
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- name: data
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mountPath: /usr/share/elasticsearch/data
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env:
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- name: cluster.name
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value: k8s-logs
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- name: node.name
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valueFrom:
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fieldRef:
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fieldPath: metadata.name
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- name: cluster.initial_master_nodes
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value: "es-0,es-1,es-2"
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- name: discovery.zen.minimum_master_nodes
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value: "2"
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- name: discovery.seed_hosts
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value: "elasticsearch"
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- name: ESJAVAOPTS
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value: "-Xms512m -Xmx512m"
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- name: network.host
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value: "0.0.0.0"
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- name: node.max_local_storage_nodes
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value: "3"
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volumeClaimTemplates:
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- metadata:
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name: data
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labels:
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app: elasticsearch
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spec:
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accessModes: [ "ReadWriteMany" ]
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storageClassName: data-es
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resources:
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requests:
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storage: 25Gi
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```
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#### 4.创建Services发布ES集群
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```yaml
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[root@xingdiancloud-master ~]# vim elasticsearch-svc.yaml
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kind: Service
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apiVersion: v1
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metadata:
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name: elasticsearch
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namespace: logging
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labels:
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app: elasticsearch
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spec:
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selector:
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app: elasticsearch
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type: NodePort
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ports:
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- port: 9200
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targetPort: 9200
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nodePort: 30010
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name: rest
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- port: 9300
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name: inter-node
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```
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#### 5.访问测试
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注意：
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使用elasticVUE插件访问集群
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集群状态正常
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集群所有节点正常
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## 三：代理及DNS配置
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#### 1.代理配置
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注意：
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部署略
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在此使用Nginx作为代理
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基于用户的访问控制用户和密码自行创建（htpasswd）
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配置文件如下
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```shell
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[root@proxy ~]# cat /etc/nginx/conf.d/elasticsearch.conf
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server {
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listen 80;
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server_name es.xingdian.com;
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location / {
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auth_basic "xingdiancloud kibana";
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auth_basic_user_file /etc/nginx/pass;
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proxy_pass http://地址+端口;
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}
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}
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```
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#### 2.域名解析配置
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注意：
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部署略
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配置如下
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```shell
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[root@www ~]# cat /var/named/xingdian.com.zone
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$TTL 1D
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@ IN SOA @ rname.invalid. (
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0 ; serial
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1D ; refresh
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1H ; retry
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1W ; expire
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3H ) ; minimum
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NS @
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A DNS地址
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es A 代理地址
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AAAA ::1
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```
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#### 3.访问测试
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略
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