Elasticsearch集群UNASSIGNED shareds问题 修复
线上有3台es组成集群，其他有两台非正常关机了，早上过来发现集群状态为红色，提示"24 UNASSIGNED shareds":1）查看集群相关信息：
curl 'localhost:9200/_nodes/process?pretty'
记下这个node的id号；
2）然后找出UNASSIGNED 的相关信息，方便后续修改！
# curl -XGET http://localhost:9200/_cat/shards|grep UNASSIGNED
% Total % Received % XferdAverage Speed Time Time TimeCurrent
DloadUpload Total Spent LeftSpeed
100 30528100 30528 0 0 705k 0 --:--:-- --:--:-- --:--:--745k
graylog_831 p UNASSIGNED
graylog_831 r UNASSIGNED
graylog_830 p UNASSIGNED
graylog_830 r UNASSIGNED
graylog_821 p UNASSIGNED
graylog_821 r UNASSIGNED
graylog_852 p UNASSIGNED
graylog_852 r UNASSIGNED
graylog_851 p UNASSIGNED
graylog_851 r UNASSIGNED
graylog_840 p UNASSIGNED
graylog_840 r UNASSIGNED
graylog_871 p UNASSIGNED
graylog_871 r UNASSIGNED
graylog_863 p UNASSIGNED
graylog_863 r UNASSIGNED
graylog_861 p UNASSIGNED
graylog_861 r UNASSIGNED
graylog_893 p UNASSIGNED
graylog_893 r UNASSIGNED
graylog_881 p UNASSIGNED
graylog_881 r UNASSIGNED
graylog_880 p UNASSIGNED
graylog_880 r UNASSIGNED
3）然后依次修改以上UNASSIGNED ，命令为：
curl -XPOST 'localhost:9200/_cluster/reroute' -d '{
"commands" : [ {
"allocate" : {
"index" : "graylog_83",
"shard" : 1,
"node" : "Auq82gfGQVWgOBw6S7ajRQ",
"allow_primary" : true
}
}]
}'
PS：
index就是索引的名称：也就是graylog_88,graylog_86,graylog_87.....
node:就是在哪个节点上执行；
shared：分片的编号！
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