How to get/update aliases with go-elasticsearch? - go

Question

I'm using the go-elasticsearch and I need to use the operations in the Aliases API:
GET _alias/my-alias-name to get the information on an alias
POST _aliases to add multiple index names to an alias in an atomic operation
I can't find the representations of these APIs in the go-elasticsearch client, is there any alternative way to make a request to these endpoints with the library, or I just need to use a plain HTTP client only for these methods?

Answer 1

Finally found a way to do it, the Aliases API is inside the Indices API:
GET _alias/my-alias-name: we can get the alias information using the GetAlias() method, building a request like this:
res, err := s.client.Indices.GetAlias(
s.client.Indices.GetAlias.WithName("my-alias-name"),
s.client.Indices.GetAlias.WithContext(context.Background()),
)
if err != nil {
log.Fatal(err)
}
// ...parse response
POST _aliases to add or delete indices to aliases in an single operation we can use UpdateAliases():
type UpdateAliasRequest struct {
Actions []map[string]*UpdateAliasAction `json:"actions"`
}
// UpdateAliasAction represents an action in the Elasticsearch Aliases API.
type UpdateAliasAction struct {
Index string `json:"index"`
Alias string `json:"alias"`
}
updateActions := make([]map[string]*UpdateAliasAction, 0)
removeAction := make(map[string]*UpdateAliasAction)
removeAction["remove"] = &UpdateAliasAction{
Index: "old-index-00",
Alias: "my-alias-name",
}
updateActions = append(updateActions, removeAction)
addAction := make(map[string]*UpdateAliasAction)
addAction["add"] = &UpdateAliasAction{
Index: "new-index-00",
Alias: "my-alias-name",
}
updateActions = append(updateActions, addAction)
jsonBody, err := json.Marshal(&UpdateAliasRequest{
Actions: updateActions,
})
if err != nil {
log.Fatal(err)
}
// make API request
res, err := s.client.Indices.UpdateAliases(
bytes.NewBuffer(jsonBody),
s.client.Indices.UpdateAliases.WithContext(context.Background()),
)
if err != nil {
log.Fatal(err)
}
// ...parse response