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---
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layout: default
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title: Go client
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nav_order: 80
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---
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# Go client
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The OpenSearch Go client lets you connect your Go application with the data in your OpenSearch cluster.
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## Setup
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If you're creating a new project:
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```go
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go mod init
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```
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To add the client to your project, import it like any other module:
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```go
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go get github.com/opensearch-project/opensearch-go
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```
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## Sample code
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This sample code creates a client, adds an index with non-default settings, inserts a document, searches for the document, deletes the document, and finally deletes the index:
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```go
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package main
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import (
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"os"
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"context"
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"crypto/tls"
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"fmt"
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opensearch "github.com/opensearch-project/opensearch-go"
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opensearchapi "github.com/opensearch-project/opensearch-go/opensearchapi"
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"net/http"
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"strings"
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)
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const IndexName = "go-test-index1"
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func main() {
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// Initialize the client with SSL/TLS enabled.
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client, err := opensearch.NewClient(opensearch.Config{
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Transport: &http.Transport{
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TLSClientConfig: &tls.Config{InsecureSkipVerify: true},
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},
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Addresses: []string{"https://localhost:9200"},
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Username: "admin", // For testing only. Don't store credentials in code.
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Password: "admin",
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})
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if err != nil {
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fmt.Println("cannot initialize", err)
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os.Exit(1)
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}
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// Print OpenSearch version information on console.
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fmt.Println(client.Info())
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// Define index mapping.
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mapping := strings.NewReader(`{
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'settings': {
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'index': {
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'number_of_shards': 4
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}
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}
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}`)
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// Create an index with non-default settings.
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res := opensearchapi.CreateRequest{
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Index: IndexName,
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Body: mapping,
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}
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fmt.Println("creating index", res)
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// Add a document to the index.
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document := strings.NewReader(`{
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"title": "Moneyball",
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"director": "Bennett Miller",
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"year": "2011"
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}`)
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docId := "1"
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req := opensearchapi.IndexRequest{
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Index: IndexName,
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DocumentID: docId,
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Body: document,
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}
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insertResponse, err := req.Do(context.Background(), client)
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if err != nil {
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fmt.Println("failed to insert document ", err)
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os.Exit(1)
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}
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fmt.Println(insertResponse)
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// Search for the document.
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content := strings.NewReader(`{
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"size": 5,
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"query": {
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"multi_match": {
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"query": "miller",
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"fields": ["title^2", "director"]
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}
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}
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}`)
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search := opensearchapi.SearchRequest{
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Body: content,
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}
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searchResponse, err := search.Do(context.Background(), client)
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if err != nil {
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fmt.Println("failed to search document ", err)
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os.Exit(1)
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}
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fmt.Println(searchResponse)
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// Delete the document.
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delete := opensearchapi.DeleteRequest{
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Index: IndexName,
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DocumentID: docId,
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}
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deleteResponse, err := delete.Do(context.Background(), client)
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if err != nil {
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fmt.Println("failed to delete document ", err)
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os.Exit(1)
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}
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fmt.Println("deleting document")
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fmt.Println(deleteResponse)
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// Delete previously created index.
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deleteIndex := opensearchapi.IndicesDeleteRequest{
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Index: []string{IndexName},
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}
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deleteIndexResponse, err := deleteIndex.Do(context.Background(), client)
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if err != nil {
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fmt.Println("failed to delete index ", err)
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os.Exit(1)
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}
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fmt.Println("deleting index", deleteIndexResponse)
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}
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```
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@@ -1,7 +1,7 @@
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---
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layout: default
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title: Java high-level REST client
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nav_order: 97
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nav_order: 60
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---
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# Java high-level REST client
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@@ -2,7 +2,7 @@
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layout: default
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title: ISM API
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parent: Index State Management
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nav_order: 20
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nav_order: 5
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---
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# ISM API
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@@ -1,7 +1,7 @@
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---
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layout: default
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title: Refresh search analyzer
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nav_order: 50
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nav_order: 40
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has_children: false
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redirect_from: /im-plugin/refresh-analyzer/
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has_toc: false
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@@ -1,41 +0,0 @@
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---
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layout: default
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title: Index management security
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nav_order: 40
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has_children: false
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---
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# Index management security
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Using the security plugin with index management lets you limit non-admin users to certain actions. For example, you might want to set up your security such that a group of users can only read ISM policies, while others can create, delete, or change policies.
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All index management data are protected as system indices, and only a super admin or an admin with a Transport Layer Security (TLS) certificate can access system indices. For more information, see [System indices]({{site.url}}{{site.baseurl}}/security-plugin/configuration/system-indices).
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## Basic permissions
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The security plugin comes with one role that offers full access to index management: `index_management_full_access`. For a description of the role's permissions, see [Predefined roles]({{site.url}}{{site.baseurl}}/security-plugin/access-control/users-roles#predefined-roles).
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With security enabled, users not only need the correct index management permissions, but they also need permissions to execute actions to involved indices. For example, if a user wants to use the REST API to attach a policy that executes a rollup job to an index named `system-logs`, they would need the permissions to attach a policy and execute a rollup job, as well as access to `system-logs`.
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Finally, with the exceptions of Create Policy, Get Policy, and Delete Policy, users also need the `indices:admin/opensearch/ism/managedindex` permission to execute [ISM APIs]({{site.url}}{{site.baseurl}}/im-plugin/ism/api).
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## (Advanced) Limit access by backend role
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You can use backend roles to configure fine-grained access to index management policies and actions. For example, users of different departments in an organization might view different policies depending on what roles and permissions they are assigned.
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First, ensure your users have the appropriate [backend roles]({{site.url}}{{site.baseurl}}/security-plugin/access-control/index/). Backend roles usually come from an [LDAP server]({{site.url}}{{site.baseurl}}/security-plugin/configuration/ldap/) or [SAML provider]({{site.url}}{{site.baseurl}}/security-plugin/configuration/saml/). However, if you use the internal user database, you can use the REST API to [add them manually]({{site.url}}{{site.baseurl}}/security-plugin/access-control/api#create-user).
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Use the REST API to enable the following setting:
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```json
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PUT _cluster/settings
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{
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"transient": {
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"plugins.index_management.filter_by_backend_roles": "true"
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}
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}
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```
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With security enabled, only users who share at least one backend role can see and execute the policies and actions relevant to their roles.
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For example, consider a scenario with three users: `John` and `Jill`, who have the backend role `helpdesk_staff`, and `Jane`, who has the backend role `phone_operator`. `John` wants to create a policy that performs a rollup job on an index named `airline_data`, so `John` would need a backend role that has permissions to access that index, create relevant policies, and execute relevant actions, and `Jill` would be able to access the same index, policy, and job. However, `Jane` cannot access or edit those resources or actions.
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@@ -121,7 +121,6 @@ Role | Description
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`reports_full_access` | Grants full permissions to reports.
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`asynchronous_search_full_access` | Grants full permissions to all asynchronous search actions.
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`asynchronous_search_read_access` | Grants permissions to view asynchronous searches, but not to submit, modify, or delete async searches.
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`index_management_full_access` | Grants full permissions to all index management actions, including ISM, transforms, and rollups.
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For more detailed summaries of the permissions for each role, reference their action groups against the descriptions in [Default action groups]({{site.url}}{{site.baseurl}}/security-plugin/access-control/default-action-groups/).
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Reference in New Issue
Block a user