MongoDB on Windows Azure
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This document discusses running MongoDB on the Windows Azure platform. It describes: 1) The different types of cloud computing models including IaaS, PaaS, and SaaS and what each provides. 2) Key aspects of the Windows Azure platform including compute and storage services like blobs, tables, queues and drives. 3) Challenges of running MongoDB on Azure including port mapping, scaling, and data durability, and some solutions proposed including running MongoDB as a spawned process on a single instance with durable blob storage.
![Here’s How It’s Donevar storage = RoleEnvironment.GetLocalResource("MongoDBStorage");varstoragePath = storage.RootPath;string mongoRoot = Path.Combine(Environment.GetEnvironmentVariable("RoleRoot") + @"\", @"approot\MongoDB");intport = RoleEnvironment.CurrentRoleInstance.InstanceEndpoints["MongoIn"].IPEndpoint.Port;varcmdline = String.Format( "--nohttpinterface --port {0} --dbpath {1} ", port, storagePath);MongoProcess= new Process(){StartInfo= new ProcessStartInfo(Path.Combine(mongoRoot, @"mongod.exe"), cmdline) {UseShellExecute= false,WorkingDirectory= mongoRoot}};MongoProcess.Start();](https://image.slidesharecdn.com/mongodbonwindowsazure-100922100951-phpapp02/85/MongoDB-on-Windows-Azure-10-320.jpg)
MongoDB on Windows Azure
- 1. MongoDB on Windows AzureWIP ReportMongoBoston September 2010
- 2. Brief SurveyBusiness Decision Makers?IaaS (ex. AWS or RackSpace) users
- 3. Management of Resources: What you managePlatform as a Service (PaaS)Software as a Service (SaaS)PRIVATE(On-Premise)Infrastructureas a Service (IaaS)ApplicationsApplicationsApplicationsApplicationsYou ManageYou ConfigureDevelopment & Runtime KernelsDevelopment & Runtime KernelsDevelopment & Runtime KernelsDevelopment & Runtime KernelsYou ManageDatabasesDatabasesDatabasesDatabasesSecurity, Management, Load Balancing & IntegrationSecurity, Management, Load Balancing & IntegrationSecurity, Management, Load Balancing & IntegrationSecurity, Management, Load Balancing & IntegrationLogical Servers, StorageLogical Servers, StorageLogical Servers, StorageLogical Servers, StorageYou ManageManaged by VendorManaged by VendorVirtualizationVirtualizationVirtualizationVirtualizationOSOSOSOSManaged by VendorServer HardwareServer HardwareServer HardwareServer HardwareNetworking, Utilities, PhysicalNetworking, Utilities, PhysicalNetworking, Utilities, PhysicalNetworking, Utilities, Physical
- 4. The Windows Azure PlatformWindows Azure is an internet-scale cloud services platform hosted in Microsoft data centers around the world, proving a simple, reliable and powerful platform for the creation of web applications and services.
- 5. Defining the Windows Azure Architecture
- 6. Compute Services in Windows AzureGOAL: Massive ScalabilityTwo role types: Web Role & Worker RoleWindows Azure applications are built with web roles, worker roles, or a combination of both deployed to a number of instances.Scale out – not up – by replicating worker instances as needed.Allow applications to scale user and compute processing independently.Each instance runs on its own VM (virtual machine), replicated as needed
- 7. BLOBS: Provide a simple interface for storing named files along with metadata for the file.QUEUES: Provide reliable storage and delivery of messages for an application.TABLES: Provide structured storage. A table is a set of entities which contain a set of properties.Blobs, Tables, Queues and DrivesDRIVES: A durable NTFS file system volume, sharable across instances.
- 8. Running even one Mongo instanceAzure runs Windows 2008 server VMs.NET 4 included. All else must be bundled.XCOPY = GOOD. Registry and MSI = BADMongoDB = XCOPY = GOOD!!!Mongo needs disk storage.Choose: non-durable or durableLocal disk: non-durable. Blob: durable!Mongo needs connection portMultiple instances can’t talk to each otherClient can’t choose server instanceCan’t scale – multiple instances are independent!Azure uses random ports – Mongo needs to use this portMongod won’t allow mapping of http server port!
- 9. Single-Instance SolutionSingle worker role instanceLocal (non-durable) or blob (durable) storageSingle port mapped to mongod.exeServer only; no web server accessMongod instance as spawned processNot as serviceMust specify mapped port, data path, no httpIf server exits, recycle instance
- 10. Here’s How It’s Donevar storage = RoleEnvironment.GetLocalResource("MongoDBStorage");varstoragePath = storage.RootPath;string mongoRoot = Path.Combine(Environment.GetEnvironmentVariable("RoleRoot") + @"\", @"approot\MongoDB");intport = RoleEnvironment.CurrentRoleInstance.InstanceEndpoints["MongoIn"].IPEndpoint.Port;varcmdline = String.Format( "--nohttpinterface --port {0} --dbpath {1} ", port, storagePath);MongoProcess= new Process(){StartInfo= new ProcessStartInfo(Path.Combine(mongoRoot, @"mongod.exe"), cmdline) {UseShellExecute= false,WorkingDirectory= mongoRoot}};MongoProcess.Start();
- 11. Managing InstancesMongoD.exe provides statushttp (28017), mongod shellAzure Load Balancer hides instances!Single IP/Port inbound from client appsMultiple port round-robin internallyAzure-hosted apps can access instances!Must treat all instances equallyAssuming specific instance access = bad
- 12. Client works against single IP/PortNo way for client app to access individual serverNo shared storage
- 13. Multiple servers accessible via Azure serverMainly for management purposes
- 14. Replica Sets ChallengesNo shell accesshow to configure?Single IP How to access?How to monitor?DB accessHow to access Master in set?What about storage?
- 15. Replica Set SolutionReplicaSet worker roleRuns mongod with –replSetManagement role (either worker or part of web)Enumerates all ReplicaSet role instancesBuilds configuration documentConnects to one node; uploads configwhich initializes replica setClient applicationConnects to replica set via compatible driverStorageEither local storage or blob storage.If blob storage, each replica set node has its own blob
- 16. Areas to be ExploredReplica set per deploymentSelf configuring replica sets and shardsConfiguration data held in WA StorageInstance and Replica Set information pushedMongo HTTP port configuration
- 17. Coming Soon to a Cloud Near YouRDP access to instancesMongo Sharding will be simpler to implement than replication due to its cloud friendly architecture