a2a8d54bb6
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.
130 lines
3.1 KiB
Go
130 lines
3.1 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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"net/http"
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"net/url"
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"golang.org/x/net/context"
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"golang.org/x/net/context/ctxhttp"
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)
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// PingService checks if an Elasticsearch server on a given URL is alive.
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// When asked for, it can also return various information about the
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// Elasticsearch server, e.g. the Elasticsearch version number.
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//
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// Ping simply starts a HTTP GET request to the URL of the server.
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// If the server responds with HTTP Status code 200 OK, the server is alive.
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type PingService struct {
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client *Client
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url string
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timeout string
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httpHeadOnly bool
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pretty bool
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}
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// PingResult is the result returned from querying the Elasticsearch server.
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type PingResult struct {
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Name string `json:"name"`
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ClusterName string `json:"cluster_name"`
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Version struct {
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Number string `json:"number"`
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BuildHash string `json:"build_hash"`
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BuildTimestamp string `json:"build_timestamp"`
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BuildSnapshot bool `json:"build_snapshot"`
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LuceneVersion string `json:"lucene_version"`
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} `json:"version"`
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TagLine string `json:"tagline"`
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}
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func NewPingService(client *Client) *PingService {
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return &PingService{
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client: client,
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url: DefaultURL,
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httpHeadOnly: false,
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pretty: false,
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}
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}
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func (s *PingService) URL(url string) *PingService {
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s.url = url
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return s
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}
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func (s *PingService) Timeout(timeout string) *PingService {
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s.timeout = timeout
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return s
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}
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// HeadOnly makes the service to only return the status code in Do;
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// the PingResult will be nil.
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func (s *PingService) HttpHeadOnly(httpHeadOnly bool) *PingService {
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s.httpHeadOnly = httpHeadOnly
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return s
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}
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func (s *PingService) Pretty(pretty bool) *PingService {
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s.pretty = pretty
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return s
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}
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// Do returns the PingResult, the HTTP status code of the Elasticsearch
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// server, and an error.
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func (s *PingService) Do(ctx context.Context) (*PingResult, int, error) {
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s.client.mu.RLock()
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basicAuth := s.client.basicAuth
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basicAuthUsername := s.client.basicAuthUsername
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basicAuthPassword := s.client.basicAuthPassword
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s.client.mu.RUnlock()
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url_ := s.url + "/"
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params := make(url.Values)
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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.pretty {
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params.Set("pretty", "1")
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}
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if len(params) > 0 {
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url_ += "?" + params.Encode()
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}
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var method string
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if s.httpHeadOnly {
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method = "HEAD"
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} else {
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method = "GET"
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}
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// Notice: This service must NOT use PerformRequest!
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req, err := NewRequest(method, url_)
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if err != nil {
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return nil, 0, err
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}
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if basicAuth {
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req.SetBasicAuth(basicAuthUsername, basicAuthPassword)
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}
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res, err := ctxhttp.Do(ctx, s.client.c, (*http.Request)(req))
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if err != nil {
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return nil, 0, err
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}
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defer res.Body.Close()
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var ret *PingResult
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if !s.httpHeadOnly {
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ret = new(PingResult)
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if err := json.NewDecoder(res.Body).Decode(ret); err != nil {
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return nil, res.StatusCode, err
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}
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}
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return ret, res.StatusCode, nil
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}
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