TKE1.20.6搭建elasticsearch on kubernetes

Posted 2021-08-13 saynaihe

背景：
昨天刚开通了TKE1.20.6版本，想体验下elasticsearch 环境搭建到集群上，基本参照Kuberentes 1.20.5搭建eck。当然了版本还是有区别的当时安装的时候eck版本是1.5。现在貌似是1.6了？参见官方文档：https://www.elastic.co/guide/en/cloud-on-k8s/current/k8s-deploy-eck.html

1. 在kubernete集群中部署ECK

1. 安装自定义资源定义和操作员及其RBAC规则：

kubectl apply -f https://download.elastic.co/downloads/eck/1.6.0/all-in-one.yaml

2. 监视操作日志：

kubectl -n elastic-system logs -f statefulset.apps/elastic-operator

2. 部署elasticsearch集群

1. 定制化elasticsearch 镜像

最新的版本 7.13.3了image标签 定制化一下：

FROM docker.elastic.co/elasticsearch/elasticsearch:7.13.3
ARG ACCESS_KEY=XXXXXXXXX
ARG SECRET_KEY=XXXXXXX
ARG ENDPOINT=cos.ap-shanghai.myqcloud.com
ARG ES_VERSION=7.13.3

ARG PACKAGES="net-tools lsof"
ENV allow_insecure_settings 'true'
RUN rm -rf /etc/localtime && cp /usr/share/zoneinfo/Asia/Shanghai /etc/localtime

RUN echo 'Asia/Shanghai' > /etc/timezone
RUN  if [ -n "${PACKAGES}" ]; then  yum install -y $PACKAGES && yum clean all && rm -rf /var/cache/yum; fi
RUN \\
     /usr/share/elasticsearch/bin/elasticsearch-plugin install --batch repository-s3 && \\
    /usr/share/elasticsearch/bin/elasticsearch-keystore create && \\
	echo "XXXXXX"  | /usr/share/elasticsearch/bin/elasticsearch-keystore add --stdin s3.client.default.access_key  && \\
	echo "XXXXXX"  | /usr/share/elasticsearch/bin/elasticsearch-keystore add --stdin s3.client.default.secret_key

2. 打包镜像并上传到腾讯云镜像仓库，也可以是其他私有仓库

 docker build -t ccr.ccs.tencentyun.com/xxxx/elasticsearch:7.13.3 .
 docker push  ccr.ccs.tencentyun.com/xxxx/elasticsearch:7.13.3

2. 创建elasticsearch部署yaml文件，部署elasticsearch集群

修改了自己打包 image tag ，使用了腾讯云cbs csi块存储。并定义了部署的namespace，创建了namespace logging.

1. 创建部署elasticsearch应用的命名空间

kubectl create ns logging

先下发下仓库秘钥：

cat <<EOF > elastic.yaml
apiVersion: elasticsearch.k8s.elastic.co/v1
kind: Elasticsearch
metadata:
  name: elastic
  namespace: logging
spec:
  version: 7.12.0
  image: ccr.ccs.tencentyun.com/XXXX/elasticsearch:7.12.0
  http:
    tls:
      selfSignedCertificate:
        disabled: true
  nodeSets:
  - name: laya
    count: 3
    podTemplate:
      spec:
        containers:
        - name: elasticsearch
          env:
          - name: ES_JAVA_OPTS
            value: -Xms2g -Xmx2g
          resources:
            requests:
              memory: 4Gi
              cpu: 0.5
            limits:
              memory: 4Gi
              cpu: 2
        imagePullSecrets:
        - name: qcloudregistrykey              
    config:
      node.master: true
      node.data: true
      node.ingest: true
      node.store.allow_mmap: false
    volumeClaimTemplates:
    - metadata:
        name: elasticsearch-data
      spec:
        accessModes:
        - ReadWriteOnce
        storageClassName: cbs-csi 
        resources:
          requests:
            storage: 200Gi
EOF          

注意：一定记得加上仓库秘钥如果是私有仓库

        imagePullSecrets:
        - name: qcloudregistrykey

2. 部署yaml文件并查看应用部署状态

kubectl apply -f elastic.yaml
kubectl get elasticsearch -n logging
kubectl get elasticsearch -n logging
kubectl -n logging get pods --selector='elasticsearch.k8s.elastic.co/cluster-name=elastic'

3. 获取elasticsearch凭据

kubectl -n logging get secret elastic-es-elastic-user -o=jsonpath='{.data.elastic}' | base64 --decode; echo

4. 直接安装kibana了

修改了时区，和elasticsearch镜像一样都修改到了东八区，并将语言设置成了中文，关于selfSignedCertificate原因参照https://www.elastic.co/guide/en/cloud-on-k8s/1.4/k8s-kibana-http-configuration.html。

cat <<EOF > kibana.yaml
apiVersion: kibana.k8s.elastic.co/v1
kind: Kibana
metadata:
  name: elastic
  namespace: logging
spec:
  version: 7.13.3
  image: docker.elastic.co/kibana/kibana:7.13.3
  count: 1
  elasticsearchRef:
    name: elastic
  http:
    tls:
      selfSignedCertificate:
        disabled: true
  podTemplate:
    spec:
      containers:
      - name: kibana
        env:
        - name: I18N_LOCALE
          value: zh-CN
        resources:
          requests:
            memory: 1Gi
          limits:
            memory: 2Gi
        volumeMounts:
        - name: timezone-volume
          mountPath: /etc/localtime
          readOnly: true
      volumes:
      - name: timezone-volume
        hostPath:
          path: /usr/share/zoneinfo/Asia/Shanghai
EOF          

注意： 嗯 kibana一直没有起来 发现我打elasticsearch镜像的时候忘了改elasticsearch的基础镜像，还是用了7.12好吧 修改一下。一定强调一下版本的一致性（镜像哪里我修改了，怕小伙伴跟我重新做一次，这里就强调一下）
重新部署更是刺激 看tke后台有重新部署选项：

但是貌似没有生效还是老老实实的吧

imagePullPolicy: Always

5. 对外映射kibana 服务

cat <<EOF> kibana-ingress.yaml
apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  name: kibana-http
  namespace: logging
  annotations:
    kubernetes.io/ingress.class: traefik  
    traefik.ingress.kubernetes.io/router.entrypoints: web
spec:
  rules:
  - host: kibana.layabox.com
    http:
      paths:
      - pathType: Prefix
        path: /
        backend:
          service:
            name: elastic-kb-http
            port:
              number: 5601
EOF

kubectl apply -f ingress.yaml

其他的就可以参照：https://www.yuque.com/duiniwukenaihe/ehb02i/owzfle#ulRPD