获取VMWare DataStore库存数据(库存遍历)

Question

我正在尝试从我的VMware ESXi服务器中的DataStores获取典型属性(容量、可用空间、名称)。我在获取TraversalSpec、ObjectSpec和PropertySpecs时遇到了麻烦。

有人能告诉我我哪里做错了吗？

public void GetDataStoreValues()
{
    PropertyFilterSpec spec = GetDataStoreQuery();

    ObjectContent[] objectContent = _service.RetrieveProperties(_sic.propertyCollector, new[] { spec } );
    foreach (ObjectContent content in objectContent)
    {
        if (content.obj.type == "DataStore")
        {
            //... get values
        }
    }
}

private PropertyFilterSpec GetDataStoreQuery()
{
    try
    {
        // Traversal to get to the host from ComputeResource
        TraversalSpec tSpec = new TraversalSpec
        {
            name = "HStoDS",
            type = "HostSystem",
            path = "dataStore",
            skip = false
        };

        // Now create Object Spec
        var objectSpec = new ObjectSpec
        {
            obj = _sic.rootFolder,
            skip = true,
            selectSet = new SelectionSpec[] { tSpec }
        };
        var objectSpecs = new[] { objectSpec };

        // Create PropertyFilterSpec using the PropertySpec and ObjectPec
        // created above.
        // Create Property Spec
        string[] propertyArray = new[] {
                                        "summary.capacity"
                                        ,"summary.freeSpace"
                                        ,"summary.name"
                                      };
        var propertySpec = new PropertySpec
        {
            all = true,
            pathSet = propertyArray,
            type = "DataStore"
        };
        var propertySpecs = new[] { propertySpec };

        var propertyFilterSpec = new PropertyFilterSpec
        {
            propSet = propertySpecs,
            objectSet = objectSpecs
        };

        return propertyFilterSpec;
    }
    catch (Exception)
    {
    }
    return null;
}

另外，对象类型名称是否区分大小写？当我看样本的时候，我似乎看到了各种各样的案例。

谢谢你的建议。

Answer 1

第一个问题：您可以使用以下代码来获取DataStore的属性。我在vCenter 5.1上测试了这段代码

public void Test()
{
    var properties = GetProperties(
        new ManagedObjectReference { type = "Datastore", Value = "<your_datastore_key>" },
        new[] {"summary.capacity", "summary.freeSpace", "summary.name"});
}

private List<DynamicProperty> GetProperties(ManagedObjectReference objectRef, string[] properties)
{
    var typesAndProperties = new Dictionary<string, string[]> { { objectRef.type, properties } };
    var objectContents = RetrieveResults(typesAndProperties, new List<ManagedObjectReference> { objectRef });
    return ExtractDynamicProperties(objectRef, objectContents);
}

private List<ObjectContent> RetrieveResults(Dictionary<string, string[]> typesAndProperties, List<ManagedObjectReference> objectReferences)
{
    var result = new List<ObjectContent>();
    var tSpec = new TraversalSpec { path = "view", skip = false };
    var oSpec = new ObjectSpec { skip = true, selectSet = new SelectionSpec[] { tSpec } };
    oSpec.obj = service.CreateListView(serviceContent.viewManager, objectReferences.ToArray());
    tSpec.type = "ListView";

    var fSpec = new PropertyFilterSpec
    {
        objectSet = new[] { oSpec },
        propSet = typesAndProperties.Keys.Select(typeName => new PropertySpec { type = typeName, pathSet = typesAndProperties[typeName] }).ToArray()
    };

    PropertyFilterSpec[] pfs = { fSpec };
    var retrieveResult = service.RetrievePropertiesEx(serviceContent.propertyCollector, pfs, new RetrieveOptions());
    if (retrieveResult != null)
    {
        result.AddRange(retrieveResult.objects);
        while (!String.IsNullOrEmpty(retrieveResult.token))
        {
            retrieveResult = service.ContinueRetrievePropertiesEx(serviceContent.propertyCollector, retrieveResult.token);
            result.AddRange(retrieveResult.objects);
        }
        service.DestroyView(oSpec.obj);
    }
    return result;
}

private static List<DynamicProperty> ExtractDynamicProperties(ManagedObjectReference objectRef, IEnumerable<ObjectContent> objectContents)
{
    var result = new List<DynamicProperty>();
    foreach (var objectContent in objectContents)
    {
        if (objectContent.propSet == null) continue;
        if (objectContent.obj == null) continue;
        if (objectContent.obj.type != objectRef.type || objectContent.obj.Value != objectRef.Value) continue;
        result.AddRange(objectContent.propSet);
    }
    return result;
}

如何运行示例：

1. 初始化service by VimService类的对象和serviceContent by ServiceContent类的对象。
2. 使用数据存储区的密钥登录到vCenter或ESX。您可以使用Managed Object Browser查找其数据存储区的密钥。要获取数据存储对象的描述，请转到MOB中的以下链接: content -> rootFolder -> childEntity -> datastoreFolder -> childEntity。页面顶部的"Managed Object ID“值是正确的键(如datastore-46).

第二个问题：是，ManagedObjectReference的类型区分大小写。