Elasticsearch 集群管理 API
本章节要介绍的这些 API 用于获取有关集群及其节点的信息，并且可以对集群进行更改
调用这些 API 时，我们需要指定节点的名称、地址或使用 _local 路径参数
例如下面的请求
GET http://localhost:9200/_nodes/_local
会返回本地集群的信息
{ "_nodes": { "total": 1, "successful": 1, "failed": 0 }, "cluster_name": "elasticsearch", "nodes": { "4zwAMlTzRCaioBeOE9PaNw": { "name": "4zwAMlT", "transport_address": "127.0.0.1:9300", "host": "127.0.0.1", "ip": "127.0.0.1", "version": "6.3.0", "build_flavor": "default", "build_type": "zip", "build_hash": "424e937", "total_indexing_buffer": 103887667, "roles": [ "master", "data", "ingest" ], "attributes": { "ml.machine_memory": "4294967296", "xpack.installed": "true", "ml.max_open_jobs": "20", "ml.enabled": "true" }, "settings": { "client": { "type": "node" }, "cluster": { "name": "elasticsearch" }, "http": { "type": "security4", "type.default": "netty4" }, "node": { "attr": { "xpack": { "installed": "true" }, "ml": { "machine_memory": "4294967296", "max_open_jobs": "20", "enabled": "true" } }, "name": "4zwAMlT" }, "path": { "logs": "/usr/local/elasticsearch/6.3.0/logs", "home": "/usr/local/elasticsearch/6.3.0" }, "transport": { "type": "security4", "features": { "x-pack": "true" }, "type.default": "netty4" } }, "os": { "refresh_interval_in_millis": 1000, "name": "Mac OS X", "arch": "x86_64", "version": "10.13.5", "available_processors": 4, "allocated_processors": 4 }, "process": { "refresh_interval_in_millis": 1000, "id": 33621, "mlockall": false }, "jvm": { "pid": 33621, "version": "1.8.0_101", "vm_name": "Java HotSpot(TM) 64-Bit Server VM", "vm_version": "25.101-b13", "vm_vendor": "Oracle Corporation", "start_time_in_millis": 1530181150844, "mem": { "heap_init_in_bytes": 1073741824, "heap_max_in_bytes": 1038876672, "non_heap_init_in_bytes": 2555904, "non_heap_max_in_bytes": 0, "direct_max_in_bytes": 1038876672 }, "gc_collectors": [ "ParNew", "ConcurrentMarkSweep" ], "memory_pools": [ "Code Cache", "Metaspace", "Compressed Class Space", "Par Eden Space", "Par Survivor Space", "CMS Old Gen" ], "using_compressed_ordinary_object_pointers": "true", "input_arguments": [ "-Xms1g", "-Xmx1g", "-XX:+UseConcMarkSweepGC", "-XX:CMSInitiatingOccupancyFraction=75", "-XX:+UseCMSInitiatingOccupancyOnly", "-XX:+AlwaysPreTouch", "-Xss1m", "-Djava.awt.headless=true", "-Dfile.encoding=UTF-8", "-Djna.nosys=true", "-XX:-OmitStackTraceInFastThrow", "-Dio.netty.noUnsafe=true", "-Dio.netty.noKeySetOptimization=true", "-Dio.netty.recycler.maxCapacityPerThread=0", "-Dlog4j.shutdownHookEnabled=false", "-Dlog4j2.disable.jmx=true", "-Djava.io.tmpdir=/var/folders/yk/2446sljj6hn82nvzkdgxltmw0000gn/T/elasticsearch.PbjUEM9C", "-XX:+HeapDumpOnOutOfMemoryError", "-XX:HeapDumpPath=data", "-XX:ErrorFile=logs/hs_err_pid%p.log", "-XX:+PrintGCDetails", "-XX:+PrintGCDateStamps", "-XX:+PrintTenuringDistribution", "-XX:+PrintGCApplicationStoppedTime", "-Xloggc:logs/gc.log", "-XX:+UseGCLogFileRotation", "-XX:NumberOfGCLogFiles=32", "-XX:GCLogFileSize=64m", "-Des.path.home=/usr/local/elasticsearch/6.3.0", "-Des.path.conf=/usr/local/elasticsearch/6.3.0/config", "-Des.distribution.flavor=default", "-Des.distribution.type=zip" ] }, "thread_pool": { "watcher": { "type": "fixed", "min": 20, "max": 20, "queue_size": 1000 }, "force_merge": { "type": "fixed", "min": 1, "max": 1, "queue_size": -1 }, "security-token-key": { "type": "fixed", "min": 1, "max": 1, "queue_size": 1000 }, "ml_datafeed": { "type": "fixed", "min": 20, "max": 20, "queue_size": 200 }, "fetch_shard_started": { "type": "scaling", "min": 1, "max": 8, "keep_alive": "5m", "queue_size": -1 }, "listener": { "type": "fixed", "min": 2, "max": 2, "queue_size": -1 }, "ml_autodetect": { "type": "fixed", "min": 80, "max": 80, "queue_size": 80 }, "index": { "type": "fixed", "min": 4, "max": 4, "queue_size": 200 }, "refresh": { "type": "scaling", "min": 1, "max": 2, "keep_alive": "5m", "queue_size": -1 }, "generic": { "type": "scaling", "min": 4, "max": 128, "keep_alive": "30s", "queue_size": -1 }, "rollup_indexing": { "type": "fixed", "min": 4, "max": 4, "queue_size": 4 }, "warmer": { "type": "scaling", "min": 1, "max": 2, "keep_alive": "5m", "queue_size": -1 }, "search": { "type": "fixed_auto_queue_size", "min": 7, "max": 7, "queue_size": 1000 }, "flush": { "type": "scaling", "min": 1, "max": 2, "keep_alive": "5m", "queue_size": -1 }, "fetch_shard_store": { "type": "scaling", "min": 1, "max": 8, "keep_alive": "5m", "queue_size": -1 }, "management": { "type": "scaling", "min": 1, "max": 5, "keep_alive": "5m", "queue_size": -1 }, "ml_utility": { "type": "fixed", "min": 80, "max": 80, "queue_size": 500 }, "get": { "type": "fixed", "min": 4, "max": 4, "queue_size": 1000 }, "analyze": { "type": "fixed", "min": 1, "max": 1, "queue_size": 16 }, "write": { "type": "fixed", "min": 4, "max": 4, "queue_size": 200 }, "snapshot": { "type": "scaling", "min": 1, "max": 2, "keep_alive": "5m", "queue_size": -1 } }, "transport": { "bound_address": [ "[::1]:9300", "127.0.0.1:9300" ], "publish_address": "127.0.0.1:9300", "profiles": {} }, "http": { "bound_address": [ "[::1]:9200", "127.0.0.1:9200" ], "publish_address": "127.0.0.1:9200", "max_content_length_in_bytes": 104857600 }, "plugins": [ { "name": "analysis-jieba", "version": "6.0.0", "elasticsearch_version": "6.3.0", "java_version": "1.8", "description": "A jieba analysis of plugins for Elasticsearch", "classname": "org.elasticsearch.plugin.analysis.jieba.AnalysisJiebaPlugin", "extended_plugins": [], "has_native_controller": false } ], "modules": [ { "name": "aggs-matrix-stats", "version": "6.3.0", "elasticsearch_version": "6.3.0", "java_version": "1.8", "description": "Adds aggregations whose input are a list of numeric fields and output includes a matrix.", "classname": "org.elasticsearch.search.aggregations.matrix.MatrixAggregationPlugin", "extended_plugins": [], "has_native_controller": false }, { "name": "analysis-common", "version": "6.3.0", "elasticsearch_version": "6.3.0", "java_version": "1.8", "description": "Adds \"built in\" analyzers to Elasticsearch.", "classname": "org.elasticsearch.analysis.common.CommonAnalysisPlugin", "extended_plugins": [], "has_native_controller": false }, { "name": "ingest-common", "version": "6.3.0", "elasticsearch_version": "6.3.0", "java_version": "1.8", "description": "Module for ingest processors that do not require additional security permissions or have large dependencies and resources", "classname": "org.elasticsearch.ingest.common.IngestCommonPlugin", "extended_plugins": [], "has_native_controller": false }, { "name": "lang-expression", "version": "6.3.0", "elasticsearch_version": "6.3.0", "java_version": "1.8", "description": "Lucene expressions integration for Elasticsearch", "classname": "org.elasticsearch.script.expression.ExpressionPlugin", "extended_plugins": [], "has_native_controller": false }, { "name": "lang-mustache", "version": "6.3.0", "elasticsearch_version": "6.3.0", "java_version": "1.8", "description": "Mustache scripting integration for Elasticsearch", "classname": "org.elasticsearch.script.mustache.MustachePlugin", "extended_plugins": [], "has_native_controller": false }, { "name": "lang-painless", "version": "6.3.0", "elasticsearch_version": "6.3.0", "java_version": "1.8", "description": "An easy, safe and fast scripting language for Elasticsearch", "classname": "org.elasticsearch.painless.PainlessPlugin", "extended_plugins": [], "has_native_controller": false }, { "name": "mapper-extras", "version": "6.3.0", "elasticsearch_version": "6.3.0", "java_version": "1.8", "description": "Adds advanced field mappers", "classname": "org.elasticsearch.index.mapper.MapperExtrasPlugin", "extended_plugins": [], "has_native_controller": false }, { "name": "parent-join", "version": "6.3.0", "elasticsearch_version": "6.3.0", "java_version": "1.8", "description": "This module adds the support parent-child queries and aggregations", "classname": "org.elasticsearch.join.ParentJoinPlugin", "extended_plugins": [], "has_native_controller": false }, { "name": "percolator", "version": "6.3.0", "elasticsearch_version": "6.3.0", "java_version": "1.8", "description": "Percolator module adds capability to index queries and query these queries by specifying documents", "classname": "org.elasticsearch.percolator.PercolatorPlugin", "extended_plugins": [], "has_native_controller": false }, { "name": "rank-eval", "version": "6.3.0", "elasticsearch_version": "6.3.0", "java_version": "1.8", "description": "The Rank Eval module adds APIs to evaluate ranking quality.", "classname": "org.elasticsearch.index.rankeval.RankEvalPlugin", "extended_plugins": [], "has_native_controller": false }, { "name": "reindex", "version": "6.3.0", "elasticsearch_version": "6.3.0", "java_version": "1.8", "description": "The Reindex module adds APIs to reindex from one index to another or update documents in place.", "classname": "org.elasticsearch.index.reindex.ReindexPlugin", "extended_plugins": [], "has_native_controller": false }, { "name": "repository-url", "version": "6.3.0", "elasticsearch_version": "6.3.0", "java_version": "1.8", "description": "Module for URL repository", "classname": "org.elasticsearch.plugin.repository.url.URLRepositoryPlugin", "extended_plugins": [], "has_native_controller": false }, { "name": "transport-netty4", "version": "6.3.0", "elasticsearch_version": "6.3.0", "java_version": "1.8", "description": "Netty 4 based transport implementation", "classname": "org.elasticsearch.transport.Netty4Plugin", "extended_plugins": [], "has_native_controller": false }, { "name": "tribe", "version": "6.3.0", "elasticsearch_version": "6.3.0", "java_version": "1.8", "description": "Tribe module", "classname": "org.elasticsearch.tribe.TribePlugin", "extended_plugins": [], "has_native_controller": false }, { "name": "x-pack-core", "version": "6.3.0", "elasticsearch_version": "6.3.0", "java_version": "1.8", "description": "Elasticsearch Expanded Pack Plugin - Core", "classname": "org.elasticsearch.xpack.core.XPackPlugin", "extended_plugins": [], "has_native_controller": false }, { "name": "x-pack-deprecation", "version": "6.3.0", "elasticsearch_version": "6.3.0", "java_version": "1.8", "description": "Elasticsearch Expanded Pack Plugin - Deprecation", "classname": "org.elasticsearch.xpack.deprecation.Deprecation", "extended_plugins": [ "x-pack-core" ], "has_native_controller": false }, { "name": "x-pack-graph", "version": "6.3.0", "elasticsearch_version": "6.3.0", "java_version": "1.8", "description": "Elasticsearch Expanded Pack Plugin - Graph", "classname": "org.elasticsearch.xpack.graph.Graph", "extended_plugins": [ "x-pack-core" ], "has_native_controller": false }, { "name": "x-pack-logstash", "version": "6.3.0", "elasticsearch_version": "6.3.0", "java_version": "1.8", "description": "Elasticsearch Expanded Pack Plugin - Logstash", "classname": "org.elasticsearch.xpack.logstash.Logstash", "extended_plugins": [ "x-pack-core" ], "has_native_controller": false }, { "name": "x-pack-ml", "version": "6.3.0", "elasticsearch_version": "6.3.0", "java_version": "1.8", "description": "Elasticsearch Expanded Pack Plugin - Machine Learning", "classname": "org.elasticsearch.xpack.ml.MachineLearning", "extended_plugins": [ "x-pack-core" ], "has_native_controller": true }, { "name": "x-pack-monitoring", "version": "6.3.0", "elasticsearch_version": "6.3.0", "java_version": "1.8", "description": "Elasticsearch Expanded Pack Plugin - Monitoring", "classname": "org.elasticsearch.xpack.monitoring.Monitoring", "extended_plugins": [ "x-pack-core" ], "has_native_controller": false }, { "name": "x-pack-rollup", "version": "6.3.0", "elasticsearch_version": "6.3.0", "java_version": "1.8", "description": "Elasticsearch Expanded Pack Plugin - Rollup", "classname": "org.elasticsearch.xpack.rollup.Rollup", "extended_plugins": [ "x-pack-core" ], "has_native_controller": false }, { "name": "x-pack-security", "version": "6.3.0", "elasticsearch_version": "6.3.0", "java_version": "1.8", "description": "Elasticsearch Expanded Pack Plugin - Security", "classname": "org.elasticsearch.xpack.security.Security", "extended_plugins": [ "x-pack-core" ], "has_native_controller": false }, { "name": "x-pack-sql", "version": "6.3.0", "elasticsearch_version": "6.3.0", "java_version": "1.8", "description": "The Elasticsearch plugin that powers SQL for Elasticsearch", "classname": "org.elasticsearch.xpack.sql.plugin.SqlPlugin", "extended_plugins": [ "x-pack-core" ], "has_native_controller": false }, { "name": "x-pack-upgrade", "version": "6.3.0", "elasticsearch_version": "6.3.0", "java_version": "1.8", "description": "Elasticsearch Expanded Pack Plugin - Upgrade", "classname": "org.elasticsearch.xpack.upgrade.Upgrade", "extended_plugins": [ "x-pack-core" ], "has_native_controller": false }, { "name": "x-pack-watcher", "version": "6.3.0", "elasticsearch_version": "6.3.0", "java_version": "1.8", "description": "Elasticsearch Expanded Pack Plugin - Watcher", "classname": "org.elasticsearch.xpack.watcher.Watcher", "extended_plugins": [ "x-pack-core" ], "has_native_controller": false } ], "ingest": { "processors": [ { "type": "append" }, { "type": "convert" }, { "type": "date" }, { "type": "date_index_name" }, { "type": "dot_expander" }, { "type": "fail" }, { "type": "foreach" }, { "type": "grok" }, { "type": "gsub" }, { "type": "join" }, { "type": "json" }, { "type": "kv" }, { "type": "lowercase" }, { "type": "remove" }, { "type": "rename" }, { "type": "script" }, { "type": "set" }, { "type": "set_security_user" }, { "type": "sort" }, { "type": "split" }, { "type": "trim" }, { "type": "uppercase" }, { "type": "urldecode" } ] } } } }
或者使用下面的查询返回 127.0.0. 节点的信息
GET http://localhost:9200/_nodes/127.0.0.1
返回的内容和上面的一样
集群健康情况
可以在集群信息上追加 health 路径参数来查询集群的健康情况
例如下面的查询
GET http://localhost:9200/_cluster/health
返回内容如下
{ "cluster_name": "elasticsearch", "status": "yellow", "timed_out": false, "number_of_nodes": 1, "number_of_data_nodes": 1, "active_primary_shards": 20, "active_shards": 20, "relocating_shards": 0, "initializing_shards": 0, "unassigned_shards": 20, "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": 50 }
集群状态
这个 API 通过在 URL 上追加 state 路径参数来获取有关集群的状态信息
状态信息包含版本，主节点，其他节点，路由表，元数据和块
例如下面的请求
GET http://localhost:9200/_cluster/state
响应内容如下
{ "cluster_name": "elasticsearch", "status": "yellow", "timed_out": false, "number_of_nodes": 1, "number_of_data_nodes": 1, "active_primary_shards": 20, "active_shards": 20, "relocating_shards": 0, "initializing_shards": 0, "unassigned_shards": 20, "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": 50 }
集群统计信息
此 API 通过在 URL 上追加 stats 关键字来检索有关集群的统计信息
返回的内容包括分片编号，存储大小，内存使用情况，节点数，角色，操作系统和文件系统
例如下面的请求
GET http://localhost:9200/_cluster/stats
响应内容如下
```json { "cluster_name": "elasticsearch", "compressed_size_in_bytes": 10609, "version": 36, "state_uuid": "PZGaxwfWRomR8hnNJOiTGw", "master_node": "4zwAMlTzRCaioBeOE9PaNw", "blocks": {}, "nodes": { "4zwAMlTzRCaioBeOE9PaNw": { "name": "4zwAMlT", "ephemeral_id": "geT2RMT0TKyYQKtrRR2lhQ", "transport_address": "127.0.0.1:9300", "attributes": { "ml.machine_memory": "4294967296", "xpack.installed": "true", "ml.max_open_jobs": "20", "ml.enabled": "true" } } }, "metadata": { "cluster_uuid": "UgKKy4O-TTKrux4cHHcrZQ", "templates": { ".monitoring-es": { "index_patterns": [ ".monitoring-es-6-*" ], "order": 0, "settings": { "index": { "format": "6", "codec": "best_compression", "number_of_shards": "1", "auto_expand_replicas": "0-1", "number_of_replicas": "0" } }, "mappings": { "doc": { "dynamic": false, "date_detection": false, "properties": { "interval_ms": { "type": "long" }, "cluster_state": { "properties": { "shards": { "type": "object" }, "nodes_hash": { "type": "integer" }, "nodes": { "type": "object" }, "master_node": { "type": "keyword" }, "state_uuid": { "type": "keyword" }, "version": { "type": "long" }, "status": { "type": "keyword" } } }, "type": { "type": "keyword" }, "indices_stats": { "properties": { "_all": { "properties": { "primaries": { "properties": { "search": { "properties": { "query_total": { "type": "long" }, "query_time_in_millis": { "type": "long" } } }, "docs": { "properties": { "count": { "type": "long" } } }, "indexing": { "properties": { "index_time_in_millis": { "type": "long" }, "index_total": { "type": "long" } } } } }, "total": { "properties": { "search": { "properties": { "query_total": { "type": "long" }, "query_time_in_millis": { "type": "long" } } }, "docs": { "properties": { "count": { "type": "long" } } }, "indexing": { "properties": { "index_time_in_millis": { "type": "long" }, "index_total": { "type": "long" } } } } } } } } }, "node_stats": { "properties": { "jvm": { "properties": { "mem": { "properties": { "heap_used_percent": { "type": "half_float" }, "heap_max_in_bytes": { "type": "long" }, "heap_used_in_bytes": { "type": "long" } } }, "gc": { "properties": { "collectors": { "properties": { "young": { "properties": { "collection_count": { "type": "long" }, "collection_time_in_millis": { "type": "long" } } }, "old": { "properties": { "collection_count": { "type": "long" }, "collection_time_in_millis": { "type": "long" } } } } } } } } }, "indices": { "properties": { "search": { "properties": { "query_total": { "type": "long" }, "query_time_in_millis": { "type": "long" } } }, "query_cache": { "properties": { "miss_count": { "type": "long" }, "memory_size_in_bytes": { "type": "long" }, "evictions": { "type": "long" }, "hit_count": { "type": "long" } } }, "docs": { "properties": { "count": { "type": "long" } } }, "fielddata": { "properties": { "memory_size_in_bytes": { "type": "long" }, "evictions": { "type": "long" } } }, "indexing": { "properties": { "throttle_time_in_millis": { "type": "long" }, "index_time_in_millis": { "type": "long" }, "index_total": { "type": "long" } } }, "request_cache": { "properties": { "miss_count": { "type": "long" }, "memory_size_in_bytes": { "type": "long" }, "evictions": { "type": "long" }, "hit_count": { "type": "long" } } }, "store": { "properties": { "size_in_bytes": { "type": "long" } } }, "segments": { "properties": { "version_map_memory_in_bytes": { "type": "long" }, "norms_memory_in_bytes": { "type": "long" }, "count": { "type": "integer" }, "term_vectors_memory_in_bytes": { "type": "long" }, "points_memory_in_bytes": { "type": "long" }, "index_writer_memory_in_bytes": { "type": "long" }, "memory_in_bytes": { "type": "long" }, "terms_memory_in_bytes": { "type": "long" }, "doc_values_memory_in_bytes": { "type": "long" }, "stored_fields_memory_in_bytes": { "type": "long" }, "fixed_bit_set_memory_in_bytes": { "type": "long" } } } } }, "process": { "properties": { "open_file_descriptors": { "type": "long" }, "max_file_descriptors": { "type": "long" }, "cpu": { "properties": { "percent": { "type": "half_float" } } } } }, "node_master": { "type": "boolean" }, "os": { "properties": { "cpu": { "properties": { "load_average": { "properties": { "5m": { "type": "half_float" }, "15m": { "type": "half_float" }, "1m": { "type": "half_float" } } } } }, "cgroup": { "properties": { "memory": { "properties": { "usage_in_bytes": { "type": "keyword" }, "control_group": { "type": "keyword" }, "limit_in_bytes": { "type": "keyword" } } }, "cpu": { "properties": { "stat": { "properties": { "number_of_elapsed_periods": { "type": "long" }, "number_of_times_throttled": { "type": "long" }, "time_throttled_nanos": { "type": "long" } } }, "control_group": { "type": "keyword" }, "cfs_quota_micros": { "type": "long" } } }, "cpuacct": { "properties": { "control_group": { "type": "keyword" }, "usage_nanos": { "type": "long" } } } } } } }, "thread_pool": { "properties": { "watcher": { "properties": { "rejected": { "type": "long" }, "threads": { "type": "integer" }, "queue": { "type": "integer" } } }, "search": { "properties": { "rejected": { "type": "long" }, "threads": { "type": "integer" }, "queue": { "type": "integer" } } }, "get": { "properties": { "rejected": { "type": "long" }, "threads": { "type": "integer" }, "queue": { "type": "integer" } } }, "index": { "properties": { "rejected": { "type": "long" }, "threads": { "type": "integer" }, "queue": { "type": "integer" } } }, "maanagement": { "properties": { "rejected": { "type": "long" }, "threads": { "type": "integer" }, "queue": { "type": "integer" } } }, "bulk": { "properties": { "rejected": { "type": "long" }, "threads": { "type": "integer" }, "queue": { "type": "integer" } } }, "generic": { "properties": { "rejected": { "type": "long" }, "threads": { "type": "integer" }, "queue": { "type": "integer" } } } } }, "mlockall": { "type": "boolean" }, "fs": { "properties": { "io_stats": { "properties": { "total": { "properties": { "write_operations": { "type": "long" }, "write_kilobytes": { "type": "long" }, "operations": { "type": "long" }, "read_operations": { "type": "long" }, "read_kilobytes": { "type": "long" } } } } }, "total": { "properties": { "total_in_bytes": { "type": "long" }, "free_in_bytes": { "type": "long" }, "available_in_bytes": { "type": "long" } } }, "data": { "properties": { "spins": { "type": "boolean" } } } } }, "node_id": { "type": "keyword" } } }, "index_stats": { "properties": { "primaries": { "properties": { "search": { "properties": { "query_total": { "type": "long" }, "query_time_in_millis": { "type": "long" } } }, "query_cache": { "properties": { "miss_count": { "type": "long" }, "memory_size_in_bytes": { "type": "long" }, "evictions": { "type": "long" }, "hit_count": { "type": "long" } } }, "docs": { "properties": { "count": { "type": "long" } } }, "fielddata": { "properties": { "memory_size_in_bytes": { "type": "long" }, "evictions": { "type": "long" } } }, "indexing": { "properties": { "throttle_time_in_millis": { 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