- Elasticsearch Guide: other versions:
- What is Elasticsearch?
- What’s new in 7.10
- Getting started with Elasticsearch
- Set up Elasticsearch
- Installing Elasticsearch
- Configuring Elasticsearch
- Setting JVM options
- Secure settings
- Auditing settings
- Circuit breaker settings
- Cluster-level shard allocation and routing settings
- Cross-cluster replication settings
- Discovery and cluster formation settings
- Field data cache settings
- HTTP
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- License settings
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- Important Elasticsearch configuration
- Important System Configuration
- Bootstrap Checks
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- Starting Elasticsearch
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- Overview
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- Built-in analyzer reference
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- EQL
- SQL access
- Overview
- Getting Started with SQL
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- ILM: Manage the index lifecycle
- Overview
- Concepts
- Automate rollover
- Manage Filebeat time-based indices
- Index lifecycle actions
- Configure a lifecycle policy
- Migrate index allocation filters to node roles
- Resolve lifecycle policy execution errors
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- Secure a cluster
- Overview
- Configuring security
- User authentication
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- Active Directory user authentication
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- Configuring SAML single-sign-on on the Elastic Stack
- Configuring single sign-on to the Elastic Stack using OpenID Connect
- User authorization
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- Customizing roles and authorization
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- Cross cluster search, clients, and integrations
- Tutorial: Getting started with security
- Tutorial: Encrypting communications
- Troubleshooting
- Some settings are not returned via the nodes settings API
- Authorization exceptions
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- Users are frequently locked out of Active Directory
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- Cluster APIs
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- Add index alias
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- Get buckets
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- Get model snapshots
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- Set upgrade mode
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- Update datafeeds
- Update filters
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- Machine learning data frame analytics APIs
- Create data frame analytics jobs
- Create trained models
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- Delete data frame analytics jobs
- Delete trained models
- Evaluate data frame analytics
- Explain data frame analytics
- Get data frame analytics jobs
- Get data frame analytics jobs stats
- Get trained models
- Get trained models stats
- Start data frame analytics jobs
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- Migration APIs
- Reload search analyzers API
- Repositories metering APIs
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- Searchable snapshots APIs
- Security APIs
- Authenticate
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- Get role mappings
- Get roles
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- Has privileges
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- Snapshot and restore APIs
- Snapshot lifecycle management APIs
- Transform APIs
- Usage API
- Watcher APIs
- Definitions
- Migration guide
- Release notes
- Elasticsearch version 7.10.2
- Elasticsearch version 7.10.1
- Elasticsearch version 7.10.0
- Elasticsearch version 7.9.3
- Elasticsearch version 7.9.2
- Elasticsearch version 7.9.1
- Elasticsearch version 7.9.0
- Elasticsearch version 7.8.1
- Elasticsearch version 7.8.0
- Elasticsearch version 7.7.1
- Elasticsearch version 7.7.0
- Elasticsearch version 7.6.2
- Elasticsearch version 7.6.1
- Elasticsearch version 7.6.0
- Elasticsearch version 7.5.2
- Elasticsearch version 7.5.1
- Elasticsearch version 7.5.0
- Elasticsearch version 7.4.2
- Elasticsearch version 7.4.1
- Elasticsearch version 7.4.0
- Elasticsearch version 7.3.2
- Elasticsearch version 7.3.1
- Elasticsearch version 7.3.0
- Elasticsearch version 7.2.1
- Elasticsearch version 7.2.0
- Elasticsearch version 7.1.1
- Elasticsearch version 7.1.0
- Elasticsearch version 7.0.0
- Elasticsearch version 7.0.0-rc2
- Elasticsearch version 7.0.0-rc1
- Elasticsearch version 7.0.0-beta1
- Elasticsearch version 7.0.0-alpha2
- Elasticsearch version 7.0.0-alpha1
- Dependencies and versions
Cluster APIs
editCluster APIs
editNode specification
editSome cluster-level APIs may operate on a subset of the nodes which can be specified with node filters. For example, the Task Management, Nodes Stats, and Nodes Info APIs can all report results from a filtered set of nodes rather than from all nodes.
Node filters are written as a comma-separated list of individual filters, each of which adds or removes nodes from the chosen subset. Each filter can be one of the following:
-
_all
, to add all nodes to the subset. -
_local
, to add the local node to the subset. -
_master
, to add the currently-elected master node to the subset. - a node id or name, to add this node to the subset.
- an IP address or hostname, to add all matching nodes to the subset.
-
a pattern, using
*
wildcards, which adds all nodes to the subset whose name, address or hostname matches the pattern. -
master:true
,data:true
,ingest:true
,voting_only:true
,ml:true
, orcoordinating_only:true
, which respectively add to the subset all master-eligible nodes, all data nodes, all ingest nodes, all voting-only nodes, all machine learning nodes, and all coordinating-only nodes. -
master:false
,data:false
,ingest:false
,voting_only:true
,ml:false
, orcoordinating_only:false
, which respectively remove from the subset all master-eligible nodes, all data nodes, all ingest nodes, all voting-only nodes, all machine learning nodes, and all coordinating-only nodes. -
a pair of patterns, using
*
wildcards, of the formattrname:attrvalue
, which adds to the subset all nodes with a custom node attribute whose name and value match the respective patterns. Custom node attributes are configured by setting properties in the configuration file of the formnode.attr.attrname: attrvalue
.
node filters run in the order in which they are given, which is important
if using filters that remove nodes from the set. For example
_all,master:false
means all the nodes except the master-eligible ones, but
master:false,_all
means the same as _all
because the _all
filter runs
after the master:false
filter.
if no filters are given, the default is to select all nodes. However, if
any filters are given then they run starting with an empty chosen subset. This
means that filters such as master:false
which remove nodes from the chosen
subset are only useful if they come after some other filters. When used on its
own, master:false
selects no nodes.
The voting_only
role requires the default distribution of Elasticsearch and
is not supported in the OSS-only distribution.
Here are some examples of the use of node filters with the Nodes Info APIs.
# If no filters are given, the default is to select all nodes GET /_nodes # Explicitly select all nodes GET /_nodes/_all # Select just the local node GET /_nodes/_local # Select the elected master node GET /_nodes/_master # Select nodes by name, which can include wildcards GET /_nodes/node_name_goes_here GET /_nodes/node_name_goes_* # Select nodes by address, which can include wildcards GET /_nodes/10.0.0.3,10.0.0.4 GET /_nodes/10.0.0.* # Select nodes by role GET /_nodes/_all,master:false GET /_nodes/data:true,ingest:true GET /_nodes/coordinating_only:true GET /_nodes/master:true,voting_only:false # Select nodes by custom attribute (e.g. with something like `node.attr.rack: 2` in the configuration file) GET /_nodes/rack:2 GET /_nodes/ra*:2 GET /_nodes/ra*:2*
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