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<h1><center>基于Kubernetes集群构建ES集群</center></h1>
作者：行癫（盗版必究）
------
## 一：环境准备
#### 1.Kubernetes集群环境
| 节点 | 地址 |
| :---------------: | :---------: |
| Kubernetes-Master | 10.9.12.206 |
| Kubernetes-Node-1 | 10.9.12.205 |
| Kubernetes-Node-2 | 10.9.12.204 |
| Kubernetes-Node-3 | 10.9.12.203 |
| DNS服务器 | 10.9.12.210 |
| 代理服务器 | 10.9.12.209 |
| NFS存储 | 10.9.12.250 |
#### 2.Kuboard集群管理
![image-20240420164922730](https://diandiange.oss-cn-beijing.aliyuncs.com/image-20240420164922730.png)
## 二：构建ES集群
#### 1.持久化存储构建
1.NFS服务器部署
​ 略
2.创建共享目录
​ 本次采用脚本创建，脚本如下
```shell
[root@xingdiancloud-1 ~]# cat nfs.sh
#!/bin/bash
read -p "请输入您要创建的共享目录：" dir
if [ -d $dir ];then
echo "请重新输入共享目录: "
read again_dir
mkdir $again_dir -p
echo "共享目录创建成功"
read -p "请输入共享对象：" ips
echo "$again_dir ${ips}(rw,sync,no_root_squash)" >> /etc/exports
xingdian=`cat /etc/exports |grep "$again_dir" |wc -l`
if [ $xingdian -eq 1 ];then
echo "成功配置共享"
exportfs -rv >/dev/null
exit
else
exit
fi
else
mkdir $dir -p
echo "共享目录创建成功"
read -p "请输入共享对象：" ips
echo "$dir ${ips}(rw,sync,no_root_squash)" >> /etc/exports
xingdian=`cat /etc/exports |grep "$dir" |wc -l`
if [ $xingdian -eq 1 ];then
echo "成功配置共享"
exportfs -rv >/dev/null
exit
else
exit
fi
fi
```
3.创建存储类
```yaml
[root@xingdiancloud-master ~]# vim namespace.yaml
apiVersion: v1
kind: Namespace
metadata:
name: logging
[root@xingdiancloud-master ~]# vim storageclass.yaml
apiVersion: storage.k8s.io/v1
kind: StorageClass
metadata:
annotations:
k8s.kuboard.cn/storageNamespace: logging
k8s.kuboard.cn/storageType: nfs_client_provisioner
name: data-es
parameters:
archiveOnDelete: 'false'
provisioner: nfs-data-es
reclaimPolicy: Retain
volumeBindingMode: Immediate
```
4.创建存储卷
```yaml
[root@xingdiancloud-master ~]# vim persistenVolume.yaml
apiVersion: v1
kind: PersistentVolume
metadata:
annotations:
pv.kubernetes.io/bound-by-controller: 'yes'
finalizers:
- kubernetes.io/pv-protection
name: nfs-pv-data-es
spec:
accessModes:
- ReadWriteMany
capacity:
storage: 100Gi
claimRef:
apiVersion: v1
kind: PersistentVolumeClaim
name: nfs-pvc-data-es
namespace: kube-system
nfs:
path: /data/es-data
server: 10.9.12.250
persistentVolumeReclaimPolicy: Retain
storageClassName: nfs-storageclass-provisioner
volumeMode: Filesystem
```
注意：存储类和存储卷也可以使用Kuboard界面创建
#### 2.设定节点标签
```shell
[root@xingdiancloud-master ~]# kubectl label nodes xingdiancloud-node-1 es=log
```
注意：
​ 所有运行ES的节点需要进行标签的设定
​ 目的配合接下来的StatefulSet部署ES集群
#### 3.ES集群部署
​ 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。
```yaml
apiVersion: apps/v1
kind: StatefulSet
metadata:
name: es
namespace: logging
spec:
serviceName: elasticsearch
replicas: 3
selector:
matchLabels:
app: elasticsearch
template:
metadata:
labels:
app: elasticsearch
spec:
nodeSelector:
es: log
initContainers:
- name: increase-vm-max-map
image: busybox
command: ["sysctl", "-w", "vm.max_map_count=262144"]
securityContext:
privileged: true
- name: increase-fd-ulimit
image: busybox
command: ["sh", "-c", "ulimit -n 65536"]
securityContext:
privileged: true
containers:
- name: elasticsearch
image: docker.elastic.co/elasticsearch/elasticsearch:7.6.2
ports:
- name: rest
containerPort: 9200
- name: inter
containerPort: 9300
resources:
limits:
cpu: 500m
memory: 4000Mi
requests:
cpu: 500m
memory: 3000Mi
volumeMounts:
- name: data
mountPath: /usr/share/elasticsearch/data
env:
- name: cluster.name
value: k8s-logs
- name: node.name
valueFrom:
fieldRef:
fieldPath: metadata.name
- name: cluster.initial_master_nodes
value: "es-0,es-1,es-2"
- name: discovery.zen.minimum_master_nodes
value: "2"
- name: discovery.seed_hosts
value: "elasticsearch"
- name: ESJAVAOPTS
value: "-Xms512m -Xmx512m"
- name: network.host
value: "0.0.0.0"
- name: node.max_local_storage_nodes
value: "3"
volumeClaimTemplates:
- metadata:
name: data
labels:
app: elasticsearch
spec:
accessModes: [ "ReadWriteMany" ]
storageClassName: data-es
resources:
requests:
storage: 25Gi
```
#### 4.创建Services发布ES集群
```yaml
[root@xingdiancloud-master ~]# vim elasticsearch-svc.yaml
kind: Service
apiVersion: v1
metadata:
name: elasticsearch
namespace: logging
labels:
app: elasticsearch
spec:
selector:
app: elasticsearch
type: NodePort
ports:
- port: 9200
targetPort: 9200
nodePort: 30010
name: rest
- port: 9300
name: inter-node
```
#### 5.访问测试
注意：
​ 使用elasticVUE插件访问集群
​ 集群状态正常
​ 集群所有节点正常
![image-20240420172247845](https://diandiange.oss-cn-beijing.aliyuncs.com/image-20240420172247845.png)
## 三：代理及DNS配置
#### 1.代理配置
注意：
​ 部署略
​ 在此使用Nginx作为代理
​ 基于用户的访问控制用户和密码自行创建（htpasswd）
​ 配置文件如下
```shell
[root@proxy ~]# cat /etc/nginx/conf.d/elasticsearch.conf
server {
listen 80;
server_name es.xingdian.com;
location / {
auth_basic "xingdiancloud kibana";
auth_basic_user_file /etc/nginx/pass;
proxy_pass http://地址+端口;
}
}
```
#### 2.域名解析配置
注意：
​ 部署略
​ 配置如下
```shell
[root@www ~]# cat /var/named/xingdian.com.zone
$TTL 1D
@ IN SOA @ rname.invalid. (
0 ; serial
1D ; refresh
1H ; retry
1W ; expire
3H ) ; minimum
NS @
A DNS地址
es A 代理地址
AAAA ::1
```
#### 3.访问测试
​ 略