ES创建只读用户

1.创建对指定索引集合的只读角色（names：* 指所有）

POST /_security/role/read_only
{
  "indices": [
    {
      "names": [
        "test-index",
      ],
      "privileges": [
        "read"
      ]
    }
  ]
}

2.创建用户并指定为只读角色

POST /_security/user/test_user
{
  "password" : "123456",
  "roles" : ["read_only"]
}