This change adds `access` format support for notifications to a Elasticsearch server, and it refactors `namespace` format support. In the case of `access` format, for each event in Minio, a JSON document is inserted into Elasticsearch with its timestamp set to the event's timestamp, and with the ID generated automatically by elasticsearch. No events are modified or deleted in this mode. In the case of `namespace` format, for each event in Minio, a JSON document is keyed together by the bucket and object name is updated in Elasticsearch. In the case of an object being created or over-written in Minio, a new document or an existing document is inserted into the Elasticsearch index. If an object is deleted in Minio, the corresponding document is deleted from the Elasticsearch index. Additionally, this change upgrades Elasticsearch support to the 5.x series. This is a breaking change, and users of previous elasticsearch versions should upgrade. Also updates documentation on Elasticsearch notification target usage and has a link to an elasticsearch upgrade guide. This is the last patch that finally resolves #3928.
285 lines
9 KiB
Go
285 lines
9 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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"fmt"
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"net/url"
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"strings"
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"golang.org/x/net/context"
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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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