基於Nginx的服務提供和消費html
基於zookeeper的服務註冊和發現node
zk的負載均衡是能夠調控,nginx只是能調權重,其餘須要可控的都須要本身寫插件;可是nginx的吞吐量比zk大不少,能夠根據業務選擇用哪一種方式。nginx
1.建立WEB API 程序,使用NuGet下載ZookeeperNet安裝包web
2.WEB API 我只提供了一個測試方法api
public class DataIndexController : ApiController
{
[HttpGet]
public List<string> GetList()
{
List<string> result = new List<string>();
result.Add("111");
result.Add("222");
return result;
}
}
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3.WEB API Global文件中註冊服務地址到Zookeeperruby
public class WebApiApplication : System.Web.HttpApplication
{
protected void Application_Start() {
GlobalConfiguration.Configure(WebApiConfig.Register);
GlobalConfiguration.Configuration.Formatters.XmlFormatter.SupportedMediaTypes.Clear();
CreateZkNode();
}
/// <summary>
/// 註冊服務節點
/// </summary>
private void CreateZkNode() {
ZkHelper zk = new ZkHelper();
string node = AppSettingsHelper.GetStringValue("ServiceNode");
///建立節點
zk.CreateNode(node, "data");
}
}
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<add key="ServiceNode" value="/mysteel/dataindex/localhost:8550" />
<add key="ZkConnect" value="192.168.20.90:4181" />
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ZkHelper核心代碼以下架構
鏈接ZooKeeper並建立監聽負載均衡
zk = new ZooKeeper(ZkConnectString, new TimeSpan(0, 0, 0, CONST_TIMEOUT), new Watcher());
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建立Zookeeper臨時節點和永久節點dom
if (index == lt.Count - 1)
{
///葉節點設置臨時節點
zk.Create(path, "".GetBytes(), Ids.OPEN_ACL_UNSAFE, CreateMode.Ephemeral);
}
else
{
///父節點設置永久節點
zk.Create(path, "".GetBytes(), Ids.OPEN_ACL_UNSAFE, CreateMode.Persistent);
}
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建立Zookeeper監聽類工具
public class Watcher : IWatcher
{
public void Process(WatchedEvent @event)
{
if (@event.Type == EventType.NodeDataChanged)
{
Console.WriteLine(@event.Path);
}
if (@event.Type == EventType.NodeChildrenChanged)
{
Console.WriteLine(@event.Path);
}
}
}
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監聽分 數據變化和節點變化
4.將web api部署三套
5.利用ZooInspector工具查看Zookeeper節點信息
此時服務地址已經註冊上去了
若是咱們將IIS應用程序池中止或者網站中止,響應的臨時節點也會刪掉
具體數據一致性能夠參考www.cnblogs.com/leesf456/p/…
static void Main(string[] args) {
string result = string.Empty;
string strService = ZKService.Instanc.GetNode(ZKService.zkNode);
if (!string.IsNullOrEmpty(strService))
{
result = WebHelper.Get(string.Format("http://{0}//api/dataindex/getlist", strService));
}
System.Console.WriteLine(result);
System.Console.Read();
}
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<add key="zkNode" value="/mysteel/dataindex" />
<add key="ZkConnect" value="192.168.20.90:4181" />
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ZkHelper核心代碼
public string GetNode(string path) {
string result = string.Empty;
try
{
var stat = zk.Exists(path, true);
if (stat != null)
{
//取得/root節點下的子節點名稱,返回List<String>
var childData = zk.GetChildren(path, true).OrderBy(l => l).ToList();
if (childData.Count > 0)
{
Random random = new Random();
int index = random.Next(0, childData.Count);
result = childData[index];
}
}
}
catch (Exception e)
{
throw e;
}
return result;
}
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