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minio/vendor/gopkg.in/olivere/elastic.v3/cluster_state.go

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// 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 (
"fmt"
"net/url"
"strings"
"gopkg.in/olivere/elastic.v3/uritemplates"
)
// ClusterStateService allows to get a comprehensive state information of the whole cluster.
//
// See https://www.elastic.co/guide/en/elasticsearch/reference/current/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() (*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("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:"state"`
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"`
}