File: cluster_state.go

package info (click to toggle)
golang-gopkg-olivere-elastic.v5 5.0.83-1
  • links: PTS, VCS
  • area: main
  • in suites: bullseye, sid
  • size: 2,848 kB
  • sloc: makefile: 18; sh: 2
file content (284 lines) | stat: -rw-r--r-- 9,218 bytes parent folder | download | duplicates (2)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
// Copyright 2012-present Oliver Eilhard. All rights reserved.
// Use of this source code is governed by a MIT-license.
// See http://olivere.mit-license.org/license.txt for details.

package elastic

import (
	"context"
	"fmt"
	"net/url"
	"strings"

	"gopkg.in/olivere/elastic.v5/uritemplates"
)

// ClusterStateService allows to get a comprehensive state information of the whole cluster.
//
// See https://www.elastic.co/guide/en/elasticsearch/reference/5.2/cluster-state.html
// for details.
type ClusterStateService struct {
	client            *Client
	pretty            bool
	indices           []string
	metrics           []string
	allowNoIndices    *bool
	expandWildcards   string
	flatSettings      *bool
	ignoreUnavailable *bool
	local             *bool
	masterTimeout     string
}

// NewClusterStateService creates a new ClusterStateService.
func NewClusterStateService(client *Client) *ClusterStateService {
	return &ClusterStateService{
		client:  client,
		indices: make([]string, 0),
		metrics: make([]string, 0),
	}
}

// Index is a list of index names. Use _all or an empty string to
// perform the operation on all indices.
func (s *ClusterStateService) Index(indices ...string) *ClusterStateService {
	s.indices = append(s.indices, indices...)
	return s
}

// Metric limits the information returned to the specified metric.
// It can be one of: version, master_node, nodes, routing_table, metadata,
// blocks, or customs.
func (s *ClusterStateService) Metric(metrics ...string) *ClusterStateService {
	s.metrics = append(s.metrics, metrics...)
	return s
}

// AllowNoIndices indicates whether to ignore if a wildcard indices
// expression resolves into no concrete indices.
// (This includes `_all` string or when no indices have been specified).
func (s *ClusterStateService) AllowNoIndices(allowNoIndices bool) *ClusterStateService {
	s.allowNoIndices = &allowNoIndices
	return s
}

// ExpandWildcards indicates whether to expand wildcard expression to
// concrete indices that are open, closed or both..
func (s *ClusterStateService) ExpandWildcards(expandWildcards string) *ClusterStateService {
	s.expandWildcards = expandWildcards
	return s
}

// FlatSettings, when set, returns settings in flat format (default: false).
func (s *ClusterStateService) FlatSettings(flatSettings bool) *ClusterStateService {
	s.flatSettings = &flatSettings
	return s
}

// IgnoreUnavailable indicates whether specified concrete indices should be
// ignored when unavailable (missing or closed).
func (s *ClusterStateService) IgnoreUnavailable(ignoreUnavailable bool) *ClusterStateService {
	s.ignoreUnavailable = &ignoreUnavailable
	return s
}

// Local indicates whether to return local information. When set, it does not
// retrieve the state from master node (default: false).
func (s *ClusterStateService) Local(local bool) *ClusterStateService {
	s.local = &local
	return s
}

// MasterTimeout specifies timeout for connection to master.
func (s *ClusterStateService) MasterTimeout(masterTimeout string) *ClusterStateService {
	s.masterTimeout = masterTimeout
	return s
}

// Pretty indicates that the JSON response be indented and human readable.
func (s *ClusterStateService) Pretty(pretty bool) *ClusterStateService {
	s.pretty = pretty
	return s
}

// buildURL builds the URL for the operation.
func (s *ClusterStateService) buildURL() (string, url.Values, error) {
	// Build URL
	metrics := strings.Join(s.metrics, ",")
	if metrics == "" {
		metrics = "_all"
	}
	indices := strings.Join(s.indices, ",")
	if indices == "" {
		indices = "_all"
	}
	path, err := uritemplates.Expand("/_cluster/state/{metrics}/{indices}", map[string]string{
		"metrics": metrics,
		"indices": indices,
	})
	if err != nil {
		return "", url.Values{}, err
	}

	// Add query string parameters
	params := url.Values{}
	if s.pretty {
		params.Set("pretty", "1")
	}
	if s.allowNoIndices != nil {
		params.Set("allow_no_indices", fmt.Sprintf("%v", *s.allowNoIndices))
	}
	if s.expandWildcards != "" {
		params.Set("expand_wildcards", s.expandWildcards)
	}
	if s.flatSettings != nil {
		params.Set("flat_settings", fmt.Sprintf("%v", *s.flatSettings))
	}
	if s.ignoreUnavailable != nil {
		params.Set("ignore_unavailable", fmt.Sprintf("%v", *s.ignoreUnavailable))
	}
	if s.local != nil {
		params.Set("local", fmt.Sprintf("%v", *s.local))
	}
	if s.masterTimeout != "" {
		params.Set("master_timeout", s.masterTimeout)
	}
	return path, params, nil
}

// Validate checks if the operation is valid.
func (s *ClusterStateService) Validate() error {
	return nil
}

// Do executes the operation.
func (s *ClusterStateService) Do(ctx context.Context) (*ClusterStateResponse, error) {
	// Check pre-conditions
	if err := s.Validate(); err != nil {
		return nil, err
	}

	// Get URL for request
	path, params, err := s.buildURL()
	if err != nil {
		return nil, err
	}

	// Get HTTP response
	res, err := s.client.PerformRequest(ctx, "GET", path, params, nil)
	if err != nil {
		return nil, err
	}

	// Return operation response
	ret := new(ClusterStateResponse)
	if err := s.client.decoder.Decode(res.Body, ret); err != nil {
		return nil, err
	}
	return ret, nil
}

// ClusterStateResponse is the response of ClusterStateService.Do.
type ClusterStateResponse struct {
	ClusterName  string                               `json:"cluster_name"`
	Version      int64                                `json:"version"`
	StateUUID    string                               `json:"state_uuid"`
	MasterNode   string                               `json:"master_node"`
	Blocks       map[string]*clusterBlocks            `json:"blocks"`
	Nodes        map[string]*discoveryNode            `json:"nodes"`
	Metadata     *clusterStateMetadata                `json:"metadata"`
	RoutingTable map[string]*clusterStateRoutingTable `json:"routing_table"`
	RoutingNodes *clusterStateRoutingNode             `json:"routing_nodes"`
	Customs      map[string]interface{}               `json:"customs"`
}

type clusterBlocks struct {
	Global  map[string]*clusterBlock `json:"global"`  // id -> cluster block
	Indices map[string]*clusterBlock `json:"indices"` // index name -> cluster block
}

type clusterBlock struct {
	Description             string   `json:"description"`
	Retryable               bool     `json:"retryable"`
	DisableStatePersistence bool     `json:"disable_state_persistence"`
	Levels                  []string `json:"levels"`
}

type clusterStateMetadata struct {
	ClusterUUID  string                            `json:"cluster_uuid"`
	Templates    map[string]*indexTemplateMetaData `json:"templates"` // template name -> index template metadata
	Indices      map[string]*indexMetaData         `json:"indices"`   // index name _> meta data
	RoutingTable struct {
		Indices map[string]*indexRoutingTable `json:"indices"` // index name -> routing table
	} `json:"routing_table"`
	RoutingNodes struct {
		Unassigned []*shardRouting `json:"unassigned"`
		Nodes      []*shardRouting `json:"nodes"`
	} `json:"routing_nodes"`
	Customs map[string]interface{} `json:"customs"`
}

type discoveryNode struct {
	Name             string                 `json:"name"`              // server name, e.g. "es1"
	TransportAddress string                 `json:"transport_address"` // e.g. inet[/1.2.3.4:9300]
	Attributes       map[string]interface{} `json:"attributes"`        // e.g. { "data": true, "master": true }
}

type clusterStateRoutingTable struct {
	Indices map[string]interface{} `json:"indices"`
}

type clusterStateRoutingNode struct {
	Unassigned []*shardRouting `json:"unassigned"`
	// Node Id -> shardRouting
	Nodes map[string][]*shardRouting `json:"nodes"`
}

type indexTemplateMetaData struct {
	Template string                 `json:"template"` // e.g. "store-*"
	Order    int                    `json:"order"`
	Settings map[string]interface{} `json:"settings"` // index settings
	Mappings map[string]interface{} `json:"mappings"` // type name -> mapping
}

type indexMetaData struct {
	State    string                 `json:"state"`
	Settings map[string]interface{} `json:"settings"`
	Mappings map[string]interface{} `json:"mappings"`
	Aliases  []string               `json:"aliases"` // e.g. [ "alias1", "alias2" ]
}

type indexRoutingTable struct {
	Shards map[string]*shardRouting `json:"shards"`
}

type shardRouting struct {
	State          string          `json:"state"`
	Primary        bool            `json:"primary"`
	Node           string          `json:"node"`
	RelocatingNode string          `json:"relocating_node"`
	Shard          int             `json:"shard"`
	Index          string          `json:"index"`
	Version        int64           `json:"version"`
	RestoreSource  *RestoreSource  `json:"restore_source"`
	AllocationId   *allocationId   `json:"allocation_id"`
	UnassignedInfo *unassignedInfo `json:"unassigned_info"`
}

type RestoreSource struct {
	Repository string `json:"repository"`
	Snapshot   string `json:"snapshot"`
	Version    string `json:"version"`
	Index      string `json:"index"`
}

type allocationId struct {
	Id           string `json:"id"`
	RelocationId string `json:"relocation_id"`
}

type unassignedInfo struct {
	Reason  string `json:"reason"`
	At      string `json:"at"`
	Details string `json:"details"`
}