部署elasticsearch集群,配置文件可“浓缩”为以下：

cluster.name: es_cluster

node.name: node1

path.data: /app/data/elasticsearch

path.logs: /app/logs/elasticsearch

network.host: 192.168.x.x

http.port: 9200

transport.tcp.port: 9201

discovery.zen.ping.unicast.hosts: ["node1", "node2","node3"]

discovery.zen.minimum_master_nodes: 2

gateway.recover_after_nodes: 3

gateway.expected_nodes: 3

gateway.recover_after_time: 5m

http.cors.enabled: true

http.cors.allow-origin: "*"

thread_pool.bulk.queue_size: 500

xpack.security.enabled: false

下载插件进行并进行安装

插件下载地址： https://github.com/vvanholl/elasticsearch-prometheus-exporter/releases

安装: 如果有elk单独用户,切换到该用户下, wget下载，进入到es安装目录,执行 ./elasticsearch-plugin install file://$(pwd)/../../elasticsearch-prometheus-exporter-6.4.2.0.zip 即可完成安装

配置Prometheus, 添加如下配置，并重新启动Prometheus

- job_name: 'elasticsearch'

    scrape_interval: 30s

    metrics_path: "/_prometheus/metrics"

    static_configs:

    - targets:

      - 192.168.x.x:9200

      - 192.168.x.x:9200

      - 192.168.x.x:9200

配置Grafana, 导入模板，编号建议为 266 (https://grafana.com/dashboards/266) 选择数据源为 Prometheus , 添加即可，会出现如下的监控图