es升级后分片不分配

Elasticsearch | 作者 shitangjiejie | 发布于2018年05月18日 | 阅读数：7038

按照官网说的平滑升级，从5.3版本升级到5.4版本，升级之前禁用分片分配

PUT _cluster/settings

{

  "persistent": {

    "cluster.routing.allocation.enable": "none"

  }

}

升级好后打开了分片分配

PUT _cluster/settings

{

  "persistent": {

    "cluster.routing.allocation.enable": "all"

  }

}

但是今天早上过来一看发现今天的分片都没分配
请各位大佬帮忙解答下这是什么情况，我是参考着这篇文档来做的：
https://www.elastic.co/guide/e ... .html

6 个回复

rockybean - Elastic Certified Engineer, ElasticStack Fans，公众号：ElasticTalk

你 GET 这个 setting 设置是正确的吗？es日志里面有没有什么有用的信息？

你重新关闭和打开这个 allocation 的设置看下，是否就开始分配

yayg2008

你的新旧版本data目录是否有变动？

kennywu76 - Wood

如果确认集群的allocation已经打开，可以用

GET /_cluster/allocation/explain

得到分片无法分配的原因，然后据此排查问题。

shitangjiejie

运行GET /_cluster/allocation/explain 发现有个节点没打开分配到那台机器上运行打开分配

[root@scdata02 fabuxitong]# curl -XPUT http://10.10.17.202:9001/_cluster/settings -d '{ "persistent": { "cluster.routing.allocation.enable": "all" } }'

{"acknowledged":true,"persistent":{"cluster":{"routing":{"allocation":{"enable":"all"}}}},"transient":{}}

再来运行GET /_cluster/allocation/explain，发现还是同样报错

{

  "index": "ccl-2016.05.24",

  "shard": 4,

  "primary": true,

  "current_state": "unassigned",

  "unassigned_info": {

    "reason": "INDEX_CREATED",

    "at": "2018-05-17T10:28:15.193Z",

    "last_allocation_status": "no"

  },

  "can_allocate": "no",

  "allocate_explanation": "cannot allocate because allocation is not permitted to any of the nodes",

  "node_allocation_decisions": [

    {

      "node_id": "lvNcRHMXTaGXhY_-2jTsNQ",

      "node_name": "node-2",

      "transport_address": "10.10.17.202:9300",

      "node_decision": "no",

      "weight_ranking": 1,

      "deciders": [

        {

          "decider": "enable",

          "decision": "NO",

          "explanation": "no allocations are allowed due to {}"

        }

      ]

    },

    {

      "node_id": "QLMQqhAhRBGuTZJm6FXc5Q",

      "node_name": "node-1",

      "transport_address": "10.10.17.201:9300",

      "node_decision": "no",

      "weight_ranking": 2,

      "deciders": [

        {

          "decider": "enable",

          "decision": "NO",

          "explanation": "no allocations are allowed due to {}"

        }

      ]

    }

  ]

}

kennywu76 - Wood

GET /_cluster/settings 看一下集群的设置。另外查一下master结点的日志，看看有报什么异常。

夏李俊

建议试试
curl -XPUT -d {"index.routing":"null"}

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es升级后分片不分配

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