1, Index
curl -X GET 'localhost:9200/_cat/indices?v' # 查看所有index
curl -X GET "localhost:9200/_cat/indices/INDEX_PATTERN-*?v&s=index" # 查看某些名字的index
curl -X GET "localhost:9200/_cat/indices?v&s=docs.count:desc" # 查看按容量大小排序的index
curl -XDELETE "localhost:9200/INDEX_NAME" # 删除某些index
curl -X GET "localhost:9200/INDEX_NAME/_count" # 查看某个INDEX的文档数量
curl -XGET "127.0.0.1:9200/_all/_settings?pretty=true " # 查看所有Index的配置,会列出所有Index,很长...
curl -XGET "127.0.0.1:9200/office_dns_log-*/_settings?pretty=true" # 查看某些Index的配置
curl -XGET "127.0.0.1:9200/office_dns_log-*/_settings/index.number_*?pretty=true" # 查看某些Index的shards和replicas数量
# 修改索引的replicas数量
curl -XPUT "localhost:9200/INDEX_NAME/_settings?pretty" -H 'Content-Type: application/json' -d' { "number_of_replicas": 2 }'
# 查看INDEX的mapping信息
curl -XGET "127.0.0.1:9200/INDEX_NAME/_mapping?include_type_name=true&pretty=true"
主要参考:
Get index settings API
2, Node
(这里主要参考了这篇文章.)
curl -X GET "localhost:9200/_cat/nodes?v" # 查看各节点内存使用状态及负载情况
ip heap.percent ram.percent cpu load_1m load_5m load_15m node.role master name
172.18.192.101 37 80 4 0.41 0.49 0.52 dim - it-elk-node3
172.18.192.102 69 90 4 1.19 1.53 1.56 dim * it-elk-node4
172.18.192.100 36 100 1 2.91 2.60 2.86 dim - it-elk-node2
curl -X GET "localhost:9200/_nodes/stats"
curl -X GET "localhost:9200/_nodes/nodeId1,nodeId2/stats"
# return just indices
curl -X GET "localhost:9200/_nodes/stats/indices"
# return just os and process
curl -X GET "localhost:9200/_nodes/stats/os,process"
# return just process for node with IP address 10.0.0.1
curl -X GET "localhost:9200/_nodes/10.0.0.1/stats/process"
# return just process
curl -X GET "localhost:9200/_nodes/process"
# same as above
curl -X GET "localhost:9200/_nodes/_all/process"
# return just jvm and process of only nodeId1 and nodeId2
curl -X GET "localhost:9200/_nodes/nodeId1,nodeId2/jvm,process"
# same as above
curl -X GET "localhost:9200/_nodes/nodeId1,nodeId2/info/jvm,process"
# return all the information of only nodeId1 and nodeId2
curl -X GET "localhost:9200/_nodes/nodeId1,nodeId2/_all"
# Fielddata summarised by node
curl -X GET "localhost:9200/_nodes/stats/indices/fielddata?fields=field1,field2"
# Fielddata summarised by node and index
curl -X GET "localhost:9200/_nodes/stats/indices/fielddata?level=indices&fields=field1,field2"
# Fielddata summarised by node, index, and shard
curl -X GET "localhost:9200/_nodes/stats/indices/fielddata?level=shards&fields=field1,field2"
# You can use wildcards for field names
curl -X GET "localhost:9200/_nodes/stats/indices/fielddata?fields=field*"
3, segment
# 查看所有INDEX的segment(注意如果INDEX较多, 这个列表可能很长)
curl -u elastic:HMEaQXtLiJaD4zn1ZxzM -X GET "127.0.0.1:9200/_cat/segments?v"
# 查看某个INDEX的segment
curl -u elastic:HMEaQXtLiJaD4zn1ZxzM -X GET "127.0.0.1:9200/_cat/segments/INDEX_PATTERN-*?v"
4, templates相关
template可以定义每个index的设置, 以及每个field的类型, 等等(仅对将来的INDEX有效, 不对现在已有的INDEX有效).
# 查看所有templates
curl -X GET "127.0.0.1:9200/_cat/templates?v&s=name"
# 查看某一个template
curl -X GET "127.0.0.1:9200/_template/template_1?pretty=true"
# 针对某INDEX设定一个template(仅针对未来创建的index有效)
curl -XPUT 127.0.0.1:9200/_template/template_1 -H 'Content-Type: application/json' -d'{
"index_patterns": ["office_dns*"],
"settings" : {
"index.refresh_interval": "30s",
"number_of_shards": 1,
"number_of_replicas": 0,
"index.translog.durability": "request",
"index.translog.sync_interval": "30s"
},
"order" : 1
}'
# 提示:
index.refresh_interval: INDEX的刷新间隔, 默认为1s, 即写入的数据经过多少可以在ES中搜索到.
number_of_shards: 分片的数量(重要), 建议设置为node数量, 如果一个index的容量超过了30G, 会导致查询速度很慢, 此时一定要通过shards数量来分散index
number_of_replicas: 副本数量
index.translog.durability: 将translog数据(包括index/update/delete等)待久化至硬盘的方式,request是系统默认方式.
index.translog.sync_interval：translog提交间隔, 默认是5s
参考文档: https://blog.csdn.net/u014646662/article/details/99293604
5, License相关
# 查看License
curl -XGET 'http://127.0.0.1:9200/_license'
# 删除License
curl -X DELETE "localhost:9200/_license"
# 导入License(本地的License文件为aaa.json), 如果启用了用户名/密码, 这里需要加上用户密码, 例如-u elastic:password
curl -XPUT 'http://127.0.0.1:9200/_xpack/license' -H "Content-Type: application/json" -d @aaa.json
6, shards管理
curl -XGET "127.0.0.1:9200/_cluster/settings?pretty" # 查看集群最大分片数量
{
"persistent" : {
"cluster" : {
"max_shards_per_node" : "30000" # 单个节点能容纳30000个shards,默认值是1000
}
"xpack" :
"monitoring" :
"collection" : {
"enabled" : "true"
}
}
}
}
}
curl -XGET "127.0.0.1:9200/_cluster/health?pretty" # 查看当前shards使用数量
{
"cluster_name" : "it-elk",
"status" : "red",
"timed_out" : false,
"number_of_nodes" : 3,
"number_of_data_nodes" : 3,
"active_primary_shards" : 7233,
"active_shards" : 7248,
"relocating_shards" : 0,
"initializing_shards" : 12,
"unassigned_shards" : 5323,
"delayed_unassigned_shards" : 0,
"number_of_pending_tasks" : 2085,
"number_of_in_flight_fetch" : 0,
"task_max_waiting_in_queue_millis" : 3167844,
"active_shards_percent_as_number" : 57.601525868234916 #数据的正常率，100表示一切ok
}
# 查看未分配的分片
curl -XGET "127.0.0.1:9200/_cat/shards?h=index,shard,prirep,state,unassigned.*&pretty"|grep UNASSIGNED | wc -l
# 查看未分配分片, 以及未分配原因
curl -XGET localhost:9200/_cat/shards?h=index,shard,prirep,state,unassigned.reason| grep UNASSIGNED
7, template管理
# 查看所有templates
curl -X GET "127.0.0.1:9200/_cat/templates?v&s=name"
# 查看某一个template
curl -X GET "127.0.0.1:9200/_template/TEMPLATE_NAME?pretty=true"
# 设定一个名为mail的template, 使得以后的mail-w3svc1-*索引具备以下设定
curl -u -XPUT 127.0.0.1:9200/_template/mail -H 'Content-Type: application/json' -d'{
"index_patterns": ["mail-w3svc1-*"],
"settings" : {
"index.refresh_interval": "30s",
"number_of_shards": 1,
"number_of_replicas": 0,
"index.translog.durability": "request",
"index.translog.sync_interval": "30s"
},
"mappings": {
"properties": {
"rt": { "type": "integer" },
"status": { "type": "integer" },
"width": { "type": "float" }
"uri": { "type": "text", "fielddata": true },
"username": { "type": "text", "fielddata": true },
"server_ip": { "type": "text", "fielddata": true },
"client_ip": { "type": "text", "fielddata": true }
}
},
"order" : 1
}'
# 提示:
1, index.refresh_interval: INDEX的刷新间隔, 默认为1s, 即写入的数据经过多少可以在ES中搜索到
由于刷新是很耗费资源的行为, 初次导入大量数据时, 可转设置长一点(如30s)等, 后来再改成5s或者10s.
2, number_of_shards: 主分片的数量(重要), 默认为1
如果一个index的容量超过了30G, 会导致查询速度很慢, 此时可以通过shards数量来分散index
3, number_of_replicas: 副本数量, 默认为1.
请注意, 如果一个INDEX的shards为5, 而replicas的话, 会导致这个INDEX一共有5*(1+1)个分片, 会拖慢集群性能.
建议: node数量<=shards数量*(replicas数量+1)
4, index.translog.durability: 将translog数据(包括index/update/delete等操作)待久化至硬盘的方式
5, index.translog.sync_interval: translog提交间隔, 默认是5s
6, mappings.properties: 表示rt/status这几个fields的类型为int类型,并开启username/server_ip等字段的外部脚本的聚合功能
常见字段类型可参考https://www.elastic.co/guide/en/elasticsearch/reference/current/mapping-types.html
# 查看上面设定的mail模板
curl -X GET "127.0.0.1:9200/_template/mail?pretty=true"
8, Document
# 写入一条Document(如果index不存在则会自动创建)
curl -XPOST "127.0.0.1:9200/INDEX_NAME/_doc/1" -H "Content-Type: application/json" -d'{"name": "zhu kun"}'
# 查看一条Document
curl -XGET "127.0.0.1:9200/INDEX_NAME/_doc/1?pretty=true"
# 搜索一条数据
curl -XGET "127.0.0.1:9200/INDEX_NAME/_search?q=name:zhu&pretty=true"
9, 特别注意
一般text类型的field, 仅能在kibana中进行排序和搜索, 如果需要在脚本(如Grafana)中进行聚合(排序,统计,汇总等)操作,则需要设定fielddata为ture, 否则可能会报出如下的错误(参考官网这个文档):
Fielddata is disabled on text fields by default. Set `fielddata=true` on
[`your_field_name`] in order to load fielddata in memory by uninverting the
inverted index. Note that this can however use significant memory.
参考文档:
https://www.datadoghq.com/blog/elasticsearch-unassigned-shards/#reason-2-too-many-shards-not-enough-nodes
Read More