ElasticSearch用作全文检索，一直没有好好研究它的命令，每次使用的时候都要谷歌搜索，效率太低。 本文把一些特别常用的运维及操作命令整理一下，方便归类记忆
状态查询
- 获取所有
_cat系列的操作
curl http://localhost:9200/_cat
=^.^=
/_cat/allocation
/_cat/shards
/_cat/shards/{index}
/_cat/master
/_cat/nodes
/_cat/tasks
/_cat/indices
/_cat/indices/{index}
/_cat/segments
/_cat/segments/{index}
/_cat/count
/_cat/count/{index}
/_cat/recovery
/_cat/recovery/{index}
/_cat/health
/_cat/pending_tasks
/_cat/aliases
/_cat/aliases/{alias}
/_cat/thread_pool
/_cat/thread_pool/{thread_pools}
/_cat/plugins
/_cat/fielddata
/_cat/fielddata/{fields}
/_cat/nodeattrs
/_cat/repositories
/_cat/snapshots/{repository}
/_cat/templates
可以后面加一个
v，让输出内容表格显示表头;pretty则让输出缩进更规范
集群状态
- 集群状态
curl -X GET "localhost:9200/_cluster/health?pretty"
节点状态
- 节点简要信息
curl -X GET "localhost:9200/_cat/nodes?pretty&v"
ip heap.percent ram.percent cpu load_1m load_5m load_15m node.role master name
192.168.58.101 69 99 71 12.67 12.25 11.71 mdi - node-101
192.168.58.103 23 99 70 14.64 13.45 12.68 mdi - node-103
192.168.58.105 60 97 69 11.17 10.96 10.88 mdi * node-105
- 节点详细信息
curl -X GET "localhost:9200/_nodes/stats/http?pretty"
后面的http是查看的属性，另外还有
indices, fs, http, jvm, os, process, thread_pool, discovery等，支持组合（如indices,fs,http）
分片状态
- 分片
curl -X GET "localhost:9200/_cat/shards?v&pretty"
index shard prirep state docs store ip node
tenmao_index_153915944934 1 p STARTED 39931 4.1mb 172.17.0.14 35S66p1
tenmao_index_153915944934 1 r STARTED 39931 4mb 172.17.0.3 DPKsmMN
tenmao_index_153915944934 0 p STARTED 39634 4mb 172.17.0.2 PE8QHxz
tenmao_index_153915944934 0 r STARTED 39634 4mb 172.17.0.3 DPKsmMN
分片中如果存在未分配的分片， 可以查看未分片的原因：
_cat/shards?h=index,shard,prirep,state,unassigned.reason&v
索引
索引管理
- 索引列表
curl -X GET "localhost:9200/_cat/indices?v"
health status index uuid pri rep docs.count docs.deleted store.size pri.store.size
green open tenmao_index_153915944934 Z6BV1VaMRc-tC-7IucJE2w 5 1 198444 0 40.9mb 20.4mb
条件过滤：
_cat/indices?v&health=yellow
排序：
_cat/indices?v&health=yellow&s=docs.count:desc
- 索引详细信息
curl -X GET "localhost:9200/chat_index_alias/_stats?pretty"
- 数据量
curl -X GET "localhost:9200/_cat/count/chat_index_alias?v&pretty"
- 新建索引
curl -X PUT "localhost:9200/my_index" -d '
{
"settings" : {
"index" : {
"number_of_shards" : 3,
"number_of_replicas" : 2
}
}
}'
- 删除索引
curl -X DELETE "localhost:9200/tenmao_index"
curl -X DELETE "localhost:9200/tenmao_index_1504520299944"
索引使用
- 分词搜索
curl -X POST "localhost:9200/chat_index_alias/_search" -d '
{
"query": {
"match": {
"question": "吃饭了吗"
}
}
}'
- 完全匹配搜索
curl -X POST "localhost:9200/chat_index_alias/_search" -d '
{
"query": {
"match_phrase": {
"question": "你吃饭了"
}
}
}'
别名
- 查看别名
curl -X GET "localhost:9200/_alias/chat_index_alias?pretty"
- 增加别名
curl -X PUT "localhost:9200/my_index/_alias/my_index_alias?pretty"
- 删除别名
curl -X POST 'http://localhost:9200/_aliases' -d '
{
"actions": [
{"remove": {"index": "my_index", "alias": "my_index_alias"}}
]
}'
一般纯删除别名使用的比较少，一般是别名重新绑定（删除和绑定为一个原子操作）
- 别名重新绑定
curl -XPOST 'http://localhost:9200/_aliases' -d '
{
"actions" : [
{ "remove" : { "index" : "my_index", "alias" : "my_index_alias" } },
{ "add" : { "index" : "my_index_v2", "alias" : "my_index_alias" } }
]
}'
