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os_client.go
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os_client.go
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package services
import (
"context"
"crypto/tls"
"encoding/json"
"io"
"net/http"
"strconv"
"strings"
"time"
"github.com/Opster/opensearch-k8s-operator/opensearch-operator/opensearch-gateway/responses"
"github.com/opensearch-project/opensearch-go"
"github.com/opensearch-project/opensearch-go/opensearchapi"
"github.com/opensearch-project/opensearch-go/opensearchutil"
"k8s.io/utils/pointer"
)
const (
headerContentType = "Content-Type"
jsonContentHeader = "application/json"
ismResource = "_ism"
)
var AdditionalSystemIndices = []string{
".opendistro-alerting-config",
".opendistro-alerting-alert*",
".opendistro-anomaly-results*",
".opendistro-anomaly-detector*",
".opendistro-anomaly-checkpoints",
".opendistro-anomaly-detection-state",
".opendistro-reports-*",
".opendistro-notifications-*",
".opendistro-notebooks",
".opensearch-observability",
".opendistro-asynchronous-search-response*",
".replication-metadata-store",
}
type OsClusterClient struct {
OsClusterClientOptions
client *opensearch.Client
MainPage responses.MainResponse
}
type OsClusterClientOptions struct {
transport http.RoundTripper
}
type OsClusterClientOption func(*OsClusterClientOptions)
func (o *OsClusterClientOptions) apply(opts ...OsClusterClientOption) {
for _, op := range opts {
op(o)
}
}
func WithTransport(transport http.RoundTripper) OsClusterClientOption {
return func(o *OsClusterClientOptions) {
o.transport = transport
}
}
func NewOsClusterClient(clusterUrl string, username string, password string, opts ...OsClusterClientOption) (*OsClusterClient, error) {
options := OsClusterClientOptions{}
options.apply(opts...)
config := opensearch.Config{
Transport: func() http.RoundTripper {
if options.transport != nil {
return options.transport
}
return &http.Transport{
TLSClientConfig: &tls.Config{InsecureSkipVerify: true},
}
}(),
Addresses: []string{clusterUrl},
Username: username,
Password: password,
}
client, err := NewOsClusterClientFromConfig(config)
if err != nil {
return nil, err
}
client.OsClusterClientOptions = options
return client, nil
}
func NewOsClusterClientFromConfig(config opensearch.Config) (*OsClusterClient, error) {
service := new(OsClusterClient)
client, err := opensearch.NewClient(config)
if err == nil {
service.client = client
}
pingReq := opensearchapi.PingRequest{}
pingRes, err := pingReq.Do(context.Background(), client)
if err == nil && pingRes.StatusCode == 200 {
mainPageResponse, err := MainPage(client)
if err == nil {
service.MainPage = mainPageResponse
}
}
return service, err
}
func MainPage(client *opensearch.Client) (responses.MainResponse, error) {
req := opensearchapi.InfoRequest{}
infoRes, err := req.Do(context.Background(), client)
var response responses.MainResponse
if err == nil {
defer infoRes.Body.Close()
err = json.NewDecoder(infoRes.Body).Decode(&response)
}
return response, err
}
func (client *OsClusterClient) GetHealth() (responses.ClusterHealthResponse, error) {
req := opensearchapi.ClusterHealthRequest{
Level: "indices",
}
catNodesRes, err := req.Do(context.Background(), client.client)
var response responses.ClusterHealthResponse
if err == nil {
defer catNodesRes.Body.Close()
err = json.NewDecoder(catNodesRes.Body).Decode(&response)
}
return response, err
}
func (client *OsClusterClient) CatNodes() ([]responses.CatNodesResponse, error) {
req := opensearchapi.CatNodesRequest{Format: "json"}
catNodesRes, err := req.Do(context.Background(), client.client)
var response []responses.CatNodesResponse
if err == nil {
defer catNodesRes.Body.Close()
err = json.NewDecoder(catNodesRes.Body).Decode(&response)
}
return response, err
}
func (client *OsClusterClient) NodesStats() (responses.NodesStatsResponse, error) {
req := opensearchapi.NodesStatsRequest{}
catNodesRes, err := req.Do(context.Background(), client.client)
var response responses.NodesStatsResponse
if err == nil {
defer catNodesRes.Body.Close()
err = json.NewDecoder(catNodesRes.Body).Decode(&response)
}
return response, err
}
func (client *OsClusterClient) CatIndices() ([]responses.CatIndicesResponse, error) {
req := opensearchapi.CatIndicesRequest{Format: "json"}
indicesRes, err := req.Do(context.Background(), client.client)
var response []responses.CatIndicesResponse
if err != nil {
return response, err
}
defer indicesRes.Body.Close()
err = json.NewDecoder(indicesRes.Body).Decode(&response)
return response, err
}
func (client *OsClusterClient) CatShards(headers []string) ([]responses.CatShardsResponse, error) {
req := opensearchapi.CatShardsRequest{Format: "json", H: headers}
indicesRes, err := req.Do(context.Background(), client.client)
var response []responses.CatShardsResponse
if err != nil {
return response, err
}
defer indicesRes.Body.Close()
err = json.NewDecoder(indicesRes.Body).Decode(&response)
return response, err
}
func (client *OsClusterClient) CatNamedIndicesShards(headers []string, indices []string) ([]responses.CatShardsResponse, error) {
req := opensearchapi.CatShardsRequest{
Index: indices,
Format: "json",
H: headers,
}
indicesRes, err := req.Do(context.Background(), client.client)
var response []responses.CatShardsResponse
if err != nil {
return response, err
}
defer indicesRes.Body.Close()
err = json.NewDecoder(indicesRes.Body).Decode(&response)
return response, err
}
func (client *OsClusterClient) GetClusterSettings() (responses.ClusterSettingsResponse, error) {
req := opensearchapi.ClusterGetSettingsRequest{Pretty: true}
settingsRes, err := req.Do(context.Background(), client.client)
var response responses.ClusterSettingsResponse
if err != nil {
return response, err
}
defer settingsRes.Body.Close()
err = json.NewDecoder(settingsRes.Body).Decode(&response)
return response, err
}
func (client *OsClusterClient) GetFlatClusterSettings() (responses.FlatClusterSettingsResponse, error) {
req := opensearchapi.ClusterGetSettingsRequest{
FlatSettings: pointer.Bool(true),
}
settingsRes, err := req.Do(context.Background(), client.client)
var response responses.FlatClusterSettingsResponse
if err != nil {
return response, err
}
defer settingsRes.Body.Close()
if settingsRes.IsError() {
return response, ErrClusterHealthGetFailed(settingsRes.String())
}
err = json.NewDecoder(settingsRes.Body).Decode(&response)
return response, err
}
func (client *OsClusterClient) PutClusterSettings(settings responses.ClusterSettingsResponse) (responses.ClusterSettingsResponse, error) {
body := opensearchutil.NewJSONReader(settings)
req := opensearchapi.ClusterPutSettingsRequest{Body: body}
settingsRes, err := req.Do(context.Background(), client.client)
var response responses.ClusterSettingsResponse
if err != nil {
return response, err
}
defer settingsRes.Body.Close()
err = json.NewDecoder(settingsRes.Body).Decode(&response)
return response, err
}
func (client *OsClusterClient) ReRouteShard(rerouteJson string) (responses.ClusterRerouteResponse, error) {
body := strings.NewReader(rerouteJson)
req := opensearchapi.ClusterRerouteRequest{Body: body}
settingsRes, err := req.Do(context.Background(), client.client)
var response responses.ClusterRerouteResponse
if err != nil {
return response, err
}
defer settingsRes.Body.Close()
err = json.NewDecoder(settingsRes.Body).Decode(&response)
return response, err
}
func (client *OsClusterClient) GetClusterHealth() (responses.ClusterHealthResponse, error) {
req := opensearchapi.ClusterHealthRequest{
Timeout: 10 * time.Second,
}
health := responses.ClusterHealthResponse{}
resp, err := req.Do(context.Background(), client.client)
if err != nil {
return health, err
}
defer resp.Body.Close()
if resp.IsError() {
return health, ErrClusterHealthGetFailed(resp.String())
}
err = json.NewDecoder(resp.Body).Decode(&health)
return health, err
}
func (client *OsClusterClient) IndexExists(indexName string) (bool, error) {
req := opensearchapi.CatIndicesRequest{
Format: "json",
Index: []string{
indexName,
},
}
indicesRes, err := req.Do(context.Background(), client.client)
if err != nil {
return false, err
}
defer indicesRes.Body.Close()
if indicesRes.StatusCode == 404 {
return false, nil
} else if indicesRes.IsError() {
return false, ErrCatIndicesFailed(indicesRes.String())
}
return true, nil
}
// GetSecurityResource performs an HTTP GET request to OS to fetch the security resource specified by name
func (client *OsClusterClient) GetSecurityResource(ctx context.Context, resource, name string) (*opensearchapi.Response, error) {
path := generateAPIPath(resource, name)
return doHTTPGet(ctx, client.client, path)
}
// PutSecurityResource performs an HTTP PUT request to OS to create/update the security resource specified by name
func (client *OsClusterClient) PutSecurityResource(ctx context.Context, resource, name string, body io.Reader) (*opensearchapi.Response, error) {
path := generateAPIPath(resource, name)
return doHTTPPut(ctx, client.client, path, body)
}
// DeleteSecurityResource performs an HTTP DELETE request to OS to delete the security resource specified by name
func (client *OsClusterClient) DeleteSecurityResource(ctx context.Context, resource, name string) (*opensearchapi.Response, error) {
path := generateAPIPath(resource, name)
return doHTTPDelete(ctx, client.client, path)
}
// GetISMConfig performs an HTTP GET request to OS to get the ISM policy resource specified by name
func (client *OsClusterClient) GetISMConfig(ctx context.Context, name string) (*opensearchapi.Response, error) {
path := generateAPIPathISM(ismResource, name)
return doHTTPGet(ctx, client.client, path)
}
// PutISMConfig performs an HTTP PUT request to OS to create the ISM policy resource specified by name
func (client *OsClusterClient) PutISMConfig(ctx context.Context, name string, body io.Reader) (*opensearchapi.Response, error) {
path := generateAPIPathISM(ismResource, name)
return doHTTPPut(ctx, client.client, path, body)
}
// UpdateISMConfig performs an HTTP PUT request to OS to update the ISM policy resource specified by name
func (client *OsClusterClient) UpdateISMConfig(ctx context.Context, name string, seqnumber, primterm int, body io.Reader) (*opensearchapi.Response, error) {
path := generateAPIPathUpdateISM(ismResource, name, seqnumber, primterm)
return doHTTPPut(ctx, client.client, path, body)
}
// DeleteISMConfig performs an HTTP DELETE request to OS to delete the ISM policy resource specified by name
func (client *OsClusterClient) DeleteISMConfig(ctx context.Context, name string) (*opensearchapi.Response, error) {
path := generateAPIPathISM(ismResource, name)
return doHTTPDelete(ctx, client.client, path)
}
// performs an HTTP GET request to OS to get the snapshot repository specified by name
func (client *OsClusterClient) GetSnapshotRepository(ctx context.Context, name string) (*opensearchapi.Response, error) {
path := generateAPIPathSnapshotRepository(name)
return doHTTPGet(ctx, client.client, path)
}
// performs an HTTP PUT request to OS to create the snapshot repository specified by name
func (client *OsClusterClient) CreateSnapshotRepository(ctx context.Context, name string, body io.Reader) (*opensearchapi.Response, error) {
path := generateAPIPathSnapshotRepository(name)
return doHTTPPut(ctx, client.client, path, body)
}
// performs an HTTP PUT request to OS to update the snapshot repository specified by name
func (client *OsClusterClient) UpdateSnapshotRepository(ctx context.Context, name string, body io.Reader) (*opensearchapi.Response, error) {
path := generateAPIPathSnapshotRepository(name)
return doHTTPPut(ctx, client.client, path, body)
}
// DeleteISMConfig performs an HTTP DELETE request to OS to delete the ISM policy resource specified by name
func (client *OsClusterClient) DeleteSnapshotRepository(ctx context.Context, name string) (*opensearchapi.Response, error) {
path := generateAPIPathSnapshotRepository(name)
return doHTTPDelete(ctx, client.client, path)
}
// generateAPIPathISM generates a URI PATH for a specific resource endpoint and name
// For example: resource = _ism, name = example
// URI PATH = '_plugins/_ism/policies/example'
func generateAPIPathISM(resource, name string) strings.Builder {
var path strings.Builder
path.Grow(1 + len("_plugins") + 1 + len(resource) + 1 + len("policies") + 1 + len(name))
path.WriteString("/")
path.WriteString("_plugins")
path.WriteString("/")
path.WriteString(resource)
path.WriteString("/")
path.WriteString("policies")
path.WriteString("/")
path.WriteString(name)
return path
}
// generateAPIPathUpdateISM generates a URI PATH for ISM policy resource endpoint and name
// For example: resource = _ism, name = example, seq_no = 7, primary_term = 1
// URI PATH = '_plugins/_ism/policies/example?if_seq_no=7&if_primary_term=1'
func generateAPIPathUpdateISM(resource, name string, seqno, primaryterm int) strings.Builder {
var path strings.Builder
path.Grow(1 + len("_plugins") + 1 + len(resource) + 1 + len("policies") + 1 + len(name) + len("?if_seq_no=") + len(strconv.Itoa(seqno)) + len("&if_primary_term=") + len(strconv.Itoa(primaryterm)))
path.WriteString("/")
path.WriteString("_plugins")
path.WriteString("/")
path.WriteString(resource)
path.WriteString("/")
path.WriteString("policies")
path.WriteString("/")
path.WriteString(name)
path.WriteString("?if_seq_no=")
path.WriteString(strconv.Itoa(seqno))
path.WriteString("&if_primary_term=")
path.WriteString(strconv.Itoa(primaryterm))
return path
}
// generateAPIPath generates a URI PATH for a specific resource endpoint and name
// For example: resource = internalusers, name = example
// URI PATH = '_plugins/_security/api/internalusers/example'
func generateAPIPath(resource, name string) strings.Builder {
var path strings.Builder
path.Grow(1 + len("_plugins") + 1 + len("_security") + 1 + len("api") + 1 + len(resource) + 1 + len(name))
path.WriteString("/")
path.WriteString("_plugins")
path.WriteString("/")
path.WriteString("_security")
path.WriteString("/")
path.WriteString("api")
path.WriteString("/")
path.WriteString(resource)
path.WriteString("/")
path.WriteString(name)
return path
}
// generates a URI PATH for a given snapshot repository name
func generateAPIPathSnapshotRepository(name string) strings.Builder {
var path strings.Builder
path.Grow(1 + len("_snapshot") + 1 + len(name))
path.WriteString("/")
path.WriteString("_snapshot")
path.WriteString("/")
path.WriteString(name)
return path
}