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.
268 lines
7.6 KiB
Go
268 lines
7.6 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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"encoding/json"
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"fmt"
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"net/url"
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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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// IndicesRolloverService rolls an alias over to a new index when the
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// existing index is considered to be too large or too old.
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//
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// It is documented at
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// https://www.elastic.co/guide/en/elasticsearch/reference/5.2/indices-rollover-index.html.
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type IndicesRolloverService struct {
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client *Client
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pretty bool
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dryRun bool
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newIndex string
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alias string
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masterTimeout string
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timeout string
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waitForActiveShards string
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conditions map[string]interface{}
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settings map[string]interface{}
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mappings map[string]interface{}
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bodyJson interface{}
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bodyString string
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}
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// NewIndicesRolloverService creates a new IndicesRolloverService.
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func NewIndicesRolloverService(client *Client) *IndicesRolloverService {
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return &IndicesRolloverService{
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client: client,
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conditions: make(map[string]interface{}),
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settings: make(map[string]interface{}),
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mappings: make(map[string]interface{}),
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}
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}
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// Alias is the name of the alias to rollover.
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func (s *IndicesRolloverService) Alias(alias string) *IndicesRolloverService {
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s.alias = alias
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return s
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}
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// NewIndex is the name of the rollover index.
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func (s *IndicesRolloverService) NewIndex(newIndex string) *IndicesRolloverService {
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s.newIndex = newIndex
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return s
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}
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// MasterTimeout specifies the timeout for connection to master.
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func (s *IndicesRolloverService) MasterTimeout(masterTimeout string) *IndicesRolloverService {
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s.masterTimeout = masterTimeout
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return s
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}
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// Timeout sets an explicit operation timeout.
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func (s *IndicesRolloverService) Timeout(timeout string) *IndicesRolloverService {
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s.timeout = timeout
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return s
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}
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// WaitForActiveShards sets the number of active shards to wait for on the
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// newly created rollover index before the operation returns.
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func (s *IndicesRolloverService) WaitForActiveShards(waitForActiveShards string) *IndicesRolloverService {
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s.waitForActiveShards = waitForActiveShards
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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 *IndicesRolloverService) Pretty(pretty bool) *IndicesRolloverService {
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s.pretty = pretty
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return s
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}
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// DryRun, when set, specifies that only conditions are checked without
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// performing the actual rollover.
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func (s *IndicesRolloverService) DryRun(dryRun bool) *IndicesRolloverService {
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s.dryRun = dryRun
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return s
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}
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// Conditions allows to specify all conditions as a dictionary.
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func (s *IndicesRolloverService) Conditions(conditions map[string]interface{}) *IndicesRolloverService {
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s.conditions = conditions
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return s
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}
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// AddCondition adds a condition to the rollover decision.
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func (s *IndicesRolloverService) AddCondition(name string, value interface{}) *IndicesRolloverService {
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s.conditions[name] = value
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return s
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}
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// AddMaxIndexAgeCondition adds a condition to set the max index age.
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func (s *IndicesRolloverService) AddMaxIndexAgeCondition(time string) *IndicesRolloverService {
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s.conditions["max_age"] = time
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return s
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}
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// AddMaxIndexDocsCondition adds a condition to set the max documents in the index.
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func (s *IndicesRolloverService) AddMaxIndexDocsCondition(docs int64) *IndicesRolloverService {
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s.conditions["max_docs"] = docs
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return s
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}
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// Settings adds the index settings.
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func (s *IndicesRolloverService) Settings(settings map[string]interface{}) *IndicesRolloverService {
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s.settings = settings
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return s
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}
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// AddSetting adds an index setting.
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func (s *IndicesRolloverService) AddSetting(name string, value interface{}) *IndicesRolloverService {
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s.settings[name] = value
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return s
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}
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// Mappings adds the index mappings.
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func (s *IndicesRolloverService) Mappings(mappings map[string]interface{}) *IndicesRolloverService {
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s.mappings = mappings
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return s
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}
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// AddMapping adds a mapping for the given type.
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func (s *IndicesRolloverService) AddMapping(typ string, mapping interface{}) *IndicesRolloverService {
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s.mappings[typ] = mapping
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return s
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}
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// BodyJson sets the conditions that needs to be met for executing rollover,
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// specified as a serializable JSON instance which is sent as the body of
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// the request.
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func (s *IndicesRolloverService) BodyJson(body interface{}) *IndicesRolloverService {
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s.bodyJson = body
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return s
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}
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// BodyString sets the conditions that needs to be met for executing rollover,
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// specified as a string which is sent as the body of the request.
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func (s *IndicesRolloverService) BodyString(body string) *IndicesRolloverService {
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s.bodyString = body
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return s
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}
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// getBody returns the body of the request, if not explicitly set via
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// BodyJson or BodyString.
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func (s *IndicesRolloverService) getBody() interface{} {
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body := make(map[string]interface{})
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if len(s.conditions) > 0 {
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body["conditions"] = s.conditions
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}
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if len(s.settings) > 0 {
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body["settings"] = s.settings
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}
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if len(s.mappings) > 0 {
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body["mappings"] = s.mappings
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}
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return body
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}
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// buildURL builds the URL for the operation.
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func (s *IndicesRolloverService) buildURL() (string, url.Values, error) {
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// Build URL
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var err error
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var path string
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if s.newIndex != "" {
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path, err = uritemplates.Expand("/{alias}/_rollover/{new_index}", map[string]string{
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"alias": s.alias,
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"new_index": s.newIndex,
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})
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} else {
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path, err = uritemplates.Expand("/{alias}/_rollover", map[string]string{
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"alias": s.alias,
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})
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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.dryRun {
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params.Set("dry_run", "1")
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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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if s.timeout != "" {
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params.Set("timeout", s.timeout)
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}
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if s.waitForActiveShards != "" {
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params.Set("wait_for_active_shards", s.waitForActiveShards)
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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 *IndicesRolloverService) Validate() error {
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var invalid []string
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if s.alias == "" {
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invalid = append(invalid, "Alias")
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}
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if len(invalid) > 0 {
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return fmt.Errorf("missing required fields: %v", invalid)
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}
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return nil
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}
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// Do executes the operation.
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func (s *IndicesRolloverService) Do(ctx context.Context) (*IndicesRolloverResponse, 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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// Setup HTTP request body
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var body interface{}
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if s.bodyJson != nil {
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body = s.bodyJson
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} else if s.bodyString != "" {
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body = s.bodyString
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} else {
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body = s.getBody()
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}
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// Get HTTP response
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res, err := s.client.PerformRequest(ctx, "POST", path, params, body)
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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(IndicesRolloverResponse)
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if err := json.Unmarshal(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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// IndicesRolloverResponse is the response of IndicesRolloverService.Do.
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type IndicesRolloverResponse struct {
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OldIndex string `json:"old_index"`
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NewIndex string `json:"new_index"`
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RolledOver bool `json:"rolled_over"`
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DryRun bool `json:"dry_run"`
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Acknowledged bool `json:"acknowledged"`
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ShardsAcknowledged bool `json:"shards_acknowledged"`
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Conditions map[string]bool `json:"conditions"`
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}
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