如何通过API删除OpenSearch集群的跨集群搜索设置

我按照OpenSearch官方指南搭建了带有跨集群搜索（Cross Cluster Search）的集群，现在需要禁用该功能。我没有节点或底层虚拟机的访问权限，只能通过curl和API操作。

当前集群配置 #

配置跨集群搜索的命令 #

# 配置跨集群搜索
curl -k -XPUT -H 'Content-Type: application/json' -u 'admin:admin' 'https://my-cluster-hostname:9200/_cluster/settings' -d '
{
  "persistent": {
    "cluster.remote": {
      "cross-cluster-name": {
        "seeds": ["cross-cluster-node-01:9300", "cross-cluster-node-02:9300", "cross-cluster-node-03:9300", "cross-cluster-node-04:9300" ]
      }
    }
  }
}'

查询当前集群配置的命令及结果 #

# 查询集群配置
curl -XGET -k -u 'admin:admin' 'https://my-cluster-hostname:9200/_cluster/settings?pretty'

输出结果：

{
  "persistent" : {
    "cluster" : {
      "remote" : {
        "cross-cluster-name" : {
          "seeds" : [
            "cross-cluster-node-01:9300",
            "cross-cluster-node-02:9300",
            "cross-cluster-node-03:9300",
            "cross-cluster-node-04:9300"
          ]
        }
      }
    }
  },
  "transient" : { }
}

已尝试的无效操作 #

尝试直接删除配置 #

# 尝试删除所有配置
curl -XDELETE -k -u 'admin:admin' 'https://my-cluster-hostname:9200/_cluster/settings'

输出错误：

{"error":"URI [/_cluster/settings] 使用了错误的HTTP方法 [DELETE]，允许的方法为：[PUT, GET]","status":405}

尝试用空配置覆盖 #

# 尝试用空配置覆盖
curl -k -XPUT -H 'Content-Type: application/json' -u 'admin:admin' 'https://my-cluster-hostname:9200/_cluster/settings' -d '
{ "persistent": { "cluster" : { "remote" : {} } }, "transient" : { } }'

输出错误：

{"error":{"root_cause":[{"type":"action_request_validation_exception","reason":"验证失败：1: 无配置可更新;"}],"type":"action_request_validation_exception","reason":"验证失败：1: 无配置可更新;"},"status":400}

正确解决方案 #

要移除远程集群配置以禁用跨集群搜索，需将目标远程集群的seeds设置为null，执行以下命令：

curl -k -XPUT -H 'Content-Type: application/json' -u 'admin:admin' 'https://my-cluster-hostname:9200/_cluster/settings' -d '
{
  "persistent": {
    "cluster.remote": {
      "cross-cluster-name": {
        "seeds": null
      }
    }
  }
}'

内容的提问来源于stack exchange，提问作者Anemun