wsl2搭建ElasticSearch集群

最近杂事多， 要升级生产ElasticSearch集群的版本。本地先做实验，搭建es集群。

wsl2新建3个es路径,代表3个节点。
/data/elasticsearch-7.10.0_0,/data/elasticsearch-7.10.0_1,/data/elasticsearch-7.10.0_2

分别改elasticsearch.yml配置

cluster.name: my-application
node.name: node-0
http.port: 9200
transport.tcp.port: 9300
discovery.zen.ping.unicast.hosts: ["localhost:9300","localhost:9301","localhost:9302"]
cluster.initial_master_nodes: ["node-0", "node-1", "node-2"]

剩下2个类似。

启动成功。
http://localhost:9200/_cat/nodes?pretty

127.0.0.1 36 97 2 0.04 0.25 0.35 cdhilmrstw - node-2
127.0.0.1 19 97 3 0.04 0.25 0.35 cdhilmrstw - node-0
127.0.0.1 13 97 2 0.04 0.25 0.35 cdhilmrstw * node-1

升级

stop 所有es服务，
解压es7.15版本，将旧版本的config，data路径软连接到新版本的路径下。 启动所有es节点。
运行成功。但kibana前台管理index显示错误“Error loading indices Cannot read property 'aliases' of undefined”。

同步升级kibana，软连接旧kibana的config和data到新路径。启动，index显示正常。

GET _cluster/health

{
  "cluster_name" : "my-application",
  "status" : "green",
  "timed_out" : false,
  "number_of_nodes" : 3,
  "number_of_data_nodes" : 3,
  "active_primary_shards" : 17,
  "active_shards" : 34,
  "relocating_shards" : 0,
  "initializing_shards" : 0,
  "unassigned_shards" : 0,
  "delayed_unassigned_shards" : 0,
  "number_of_pending_tasks" : 0,
  "number_of_in_flight_fetch" : 0,
  "task_max_waiting_in_queue_millis" : 0,
  "active_shards_percent_as_number" : 100.0
}

禁止自动创建索引

PUT _cluster/settings
{
    "persistent": {
        "action.auto_create_index": "false" 
    }
}

{
  "acknowledged" : true,
  "persistent" : {
    "action" : {
      "auto_create_index" : "false"
    }
  },
  "transient" : { }
}

# 创建索引
PUT teacher/teacher1/1
{
  "name":"t1"
}

# 失败
{
  "error" : {
    "root_cause" : [
      {
        "type" : "index_not_found_exception",
        "reason" : "no such index [teacher] and [action.auto_create_index] is [false]",
        "index_uuid" : "_na_",
        "index" : "teacher"
      }
    ],
    "type" : "index_not_found_exception",
    "reason" : "no such index [teacher] and [action.auto_create_index] is [false]",
    "index_uuid" : "_na_",
    "index" : "teacher"
  },
  "status" : 404
}

禁止索引动态增加字段

PUT teacher/_mapping
{
  "dynamic": "strict"
}