285 lines
9.0 KiB
Go
285 lines
9.0 KiB
Go
// Copyright 2012-present Oliver Eilhard. All rights reserved.
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// Use of this source code is governed by a MIT-license.
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// See http://olivere.mit-license.org/license.txt for details.
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package elastic
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import (
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"context"
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"fmt"
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"net/url"
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"strings"
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"gopkg.in/olivere/elastic.v5/uritemplates"
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)
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// ClusterStateService allows to get a comprehensive state information of the whole cluster.
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//
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// See https://www.elastic.co/guide/en/elasticsearch/reference/5.2/cluster-state.html
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// for details.
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type ClusterStateService struct {
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client *Client
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pretty bool
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indices []string
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metrics []string
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allowNoIndices *bool
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expandWildcards string
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flatSettings *bool
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ignoreUnavailable *bool
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local *bool
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masterTimeout string
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}
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// NewClusterStateService creates a new ClusterStateService.
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func NewClusterStateService(client *Client) *ClusterStateService {
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return &ClusterStateService{
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client: client,
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indices: make([]string, 0),
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metrics: make([]string, 0),
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}
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}
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// Index is a list of index names. Use _all or an empty string to
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// perform the operation on all indices.
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func (s *ClusterStateService) Index(indices ...string) *ClusterStateService {
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s.indices = append(s.indices, indices...)
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return s
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}
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// Metric limits the information returned to the specified metric.
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// It can be one of: version, master_node, nodes, routing_table, metadata,
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// blocks, or customs.
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func (s *ClusterStateService) Metric(metrics ...string) *ClusterStateService {
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s.metrics = append(s.metrics, metrics...)
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return s
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}
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// AllowNoIndices indicates whether to ignore if a wildcard indices
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// expression resolves into no concrete indices.
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// (This includes `_all` string or when no indices have been specified).
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func (s *ClusterStateService) AllowNoIndices(allowNoIndices bool) *ClusterStateService {
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s.allowNoIndices = &allowNoIndices
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return s
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}
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// ExpandWildcards indicates whether to expand wildcard expression to
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// concrete indices that are open, closed or both..
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func (s *ClusterStateService) ExpandWildcards(expandWildcards string) *ClusterStateService {
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s.expandWildcards = expandWildcards
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return s
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}
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// FlatSettings, when set, returns settings in flat format (default: false).
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func (s *ClusterStateService) FlatSettings(flatSettings bool) *ClusterStateService {
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s.flatSettings = &flatSettings
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return s
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}
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// IgnoreUnavailable indicates whether specified concrete indices should be
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// ignored when unavailable (missing or closed).
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func (s *ClusterStateService) IgnoreUnavailable(ignoreUnavailable bool) *ClusterStateService {
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s.ignoreUnavailable = &ignoreUnavailable
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return s
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}
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// Local indicates whether to return local information. When set, it does not
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// retrieve the state from master node (default: false).
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func (s *ClusterStateService) Local(local bool) *ClusterStateService {
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s.local = &local
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return s
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}
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// MasterTimeout specifies timeout for connection to master.
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func (s *ClusterStateService) MasterTimeout(masterTimeout string) *ClusterStateService {
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s.masterTimeout = masterTimeout
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return s
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}
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// Pretty indicates that the JSON response be indented and human readable.
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func (s *ClusterStateService) Pretty(pretty bool) *ClusterStateService {
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s.pretty = pretty
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return s
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}
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// buildURL builds the URL for the operation.
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func (s *ClusterStateService) buildURL() (string, url.Values, error) {
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// Build URL
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metrics := strings.Join(s.metrics, ",")
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if metrics == "" {
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metrics = "_all"
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}
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indices := strings.Join(s.indices, ",")
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if indices == "" {
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indices = "_all"
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}
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path, err := uritemplates.Expand("/_cluster/state/{metrics}/{indices}", map[string]string{
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"metrics": metrics,
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"indices": indices,
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})
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if err != nil {
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return "", url.Values{}, err
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}
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// Add query string parameters
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params := url.Values{}
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if s.pretty {
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params.Set("pretty", "1")
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}
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if s.allowNoIndices != nil {
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params.Set("allow_no_indices", fmt.Sprintf("%v", *s.allowNoIndices))
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}
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if s.expandWildcards != "" {
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params.Set("expand_wildcards", s.expandWildcards)
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}
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if s.flatSettings != nil {
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params.Set("flat_settings", fmt.Sprintf("%v", *s.flatSettings))
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}
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if s.ignoreUnavailable != nil {
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params.Set("ignore_unavailable", fmt.Sprintf("%v", *s.ignoreUnavailable))
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}
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if s.local != nil {
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params.Set("local", fmt.Sprintf("%v", *s.local))
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}
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if s.masterTimeout != "" {
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params.Set("master_timeout", s.masterTimeout)
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}
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return path, params, nil
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}
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// Validate checks if the operation is valid.
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func (s *ClusterStateService) Validate() error {
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return nil
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}
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// Do executes the operation.
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func (s *ClusterStateService) Do(ctx context.Context) (*ClusterStateResponse, error) {
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// Check pre-conditions
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if err := s.Validate(); err != nil {
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return nil, err
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}
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// Get URL for request
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path, params, err := s.buildURL()
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if err != nil {
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return nil, err
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}
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// Get HTTP response
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res, err := s.client.PerformRequest(ctx, "GET", path, params, nil)
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if err != nil {
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return nil, err
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}
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// Return operation response
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ret := new(ClusterStateResponse)
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if err := s.client.decoder.Decode(res.Body, ret); err != nil {
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return nil, err
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}
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return ret, nil
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}
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// ClusterStateResponse is the response of ClusterStateService.Do.
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type ClusterStateResponse struct {
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ClusterName string `json:"cluster_name"`
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Version int64 `json:"version"`
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StateUUID string `json:"state_uuid"`
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MasterNode string `json:"master_node"`
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Blocks map[string]*clusterBlocks `json:"blocks"`
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Nodes map[string]*discoveryNode `json:"nodes"`
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Metadata *clusterStateMetadata `json:"metadata"`
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RoutingTable map[string]*clusterStateRoutingTable `json:"routing_table"`
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RoutingNodes *clusterStateRoutingNode `json:"routing_nodes"`
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Customs map[string]interface{} `json:"customs"`
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}
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type clusterBlocks struct {
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Global map[string]*clusterBlock `json:"global"` // id -> cluster block
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Indices map[string]*clusterBlock `json:"indices"` // index name -> cluster block
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}
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type clusterBlock struct {
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Description string `json:"description"`
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Retryable bool `json:"retryable"`
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DisableStatePersistence bool `json:"disable_state_persistence"`
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Levels []string `json:"levels"`
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}
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type clusterStateMetadata struct {
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ClusterUUID string `json:"cluster_uuid"`
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Templates map[string]*indexTemplateMetaData `json:"templates"` // template name -> index template metadata
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Indices map[string]*indexMetaData `json:"indices"` // index name _> meta data
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RoutingTable struct {
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Indices map[string]*indexRoutingTable `json:"indices"` // index name -> routing table
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} `json:"routing_table"`
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RoutingNodes struct {
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Unassigned []*shardRouting `json:"unassigned"`
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Nodes []*shardRouting `json:"nodes"`
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} `json:"routing_nodes"`
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Customs map[string]interface{} `json:"customs"`
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}
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type discoveryNode struct {
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Name string `json:"name"` // server name, e.g. "es1"
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TransportAddress string `json:"transport_address"` // e.g. inet[/1.2.3.4:9300]
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Attributes map[string]interface{} `json:"attributes"` // e.g. { "data": true, "master": true }
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}
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type clusterStateRoutingTable struct {
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Indices map[string]interface{} `json:"indices"`
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}
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type clusterStateRoutingNode struct {
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Unassigned []*shardRouting `json:"unassigned"`
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// Node Id -> shardRouting
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Nodes map[string][]*shardRouting `json:"nodes"`
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}
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type indexTemplateMetaData struct {
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Template string `json:"template"` // e.g. "store-*"
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Order int `json:"order"`
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Settings map[string]interface{} `json:"settings"` // index settings
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Mappings map[string]interface{} `json:"mappings"` // type name -> mapping
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}
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type indexMetaData struct {
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State string `json:"state"`
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Settings map[string]interface{} `json:"settings"`
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Mappings map[string]interface{} `json:"mappings"`
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Aliases []string `json:"aliases"` // e.g. [ "alias1", "alias2" ]
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}
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type indexRoutingTable struct {
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Shards map[string]*shardRouting `json:"shards"`
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}
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type shardRouting struct {
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State string `json:"state"`
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Primary bool `json:"primary"`
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Node string `json:"node"`
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RelocatingNode string `json:"relocating_node"`
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Shard int `json:"shard"`
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Index string `json:"index"`
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Version int64 `json:"version"`
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RestoreSource *RestoreSource `json:"restore_source"`
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AllocationId *allocationId `json:"allocation_id"`
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UnassignedInfo *unassignedInfo `json:"unassigned_info"`
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}
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type RestoreSource struct {
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Repository string `json:"repository"`
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Snapshot string `json:"snapshot"`
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Version string `json:"version"`
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Index string `json:"index"`
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}
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type allocationId struct {
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Id string `json:"id"`
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RelocationId string `json:"relocation_id"`
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}
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type unassignedInfo struct {
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Reason string `json:"reason"`
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At string `json:"at"`
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Details string `json:"details"`
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}
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