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    Windows Clustering

    Information

    Windows Clustering feature is only available in the Enterprise Edition.

    In order to ensure RavenDB high availability you can run it on a failover cluster.

    Requirements

    • Windows Server 2008
    • Failover Cluster Manager snap-in installed
    • Storage Area Network (SAN) configured

    Configuring RavenDB service

    Execute the following steps on every cluster node:

    1. If RavenDB isn't installed as a service follow this link in order to do it
    2. Stop RavenDB service by executing the following command on the command line: Raven.Server.exe /stop
    3. In the Raven.Server.exe.config file set up Raven/DataDir to the SAN

    Note: A failover cluster will take care of working RavenDB. If the failure take place on one of the cluster nodes then a failover cluster will start RavenDB service immediately. So it's important that RavenDB instance on every node should use the same data directory placed on the SAN.

    Creating failover cluster

    1. Go to Start -> Administrative Tool -> Failover Cluster Manager
    2. Select Create a cluster option from context menu
      Figure 1.1: FMC Configuration
    3. Go through the wizard
      Figure 1.2: FMC Configuration
    4. Add cluster nodes
      Figure 1.3: FMC Configuration
    5. Validate a cluster configuration
      Figure 1.4: FMC Configuration
    6. Validation Wizard will be shown
      Figure 1.5: FMC Configuration
    7. Run all test to make sure that nodes are configured properly
      Figure 1.6: FMC Configuration
    8. Click Next
      Figure 1.7: FMC Configuration
    9. Wait for validation finish
      Figure 1.8: FMC Configuration
    10. Name a cluster and assign IP address for it
      Figure 1.9: FMC Configuration
    11. Confirm and finish next steps
      Figure 1.10: FMC Configuration

    Adding RavenDB as a Generic Service resource

    1. Right click on Services and applications of newly created cluster and choose Configure a Service or Application... option from context menu
      Figure 2.1: FMC Configuration
    2. Go through the High Availability Wizard
      Figure 2.2: FMC Configuration
    3. Choose Generic Service
      Figure 2.3: FMC Configuration
    4. Select RavenDB service
      Figure 2.4: FMC Configuration
    5. Type the cluster service name and assign the IP address under which RavenDB will be available
      Figure 2.5: FMC Configuration
    6. RavenDB has been already configured on every node to keep data in SAN, so no storage is needed here. Click Next
      Figure 2.6: FMC Configuration
    7. Click Next
      Figure 2.7: FMC Configuration
    8. Summary screen. Click Finish
      Figure 2.8: FMC Configuration

    Windows Authentication usage

    In a clustered environment a host can have more than one name associated. That can cause problems for Kerberos. If you are going to use Windows Authentication then use static IP addresses and add a DNS A record for RavenDB.

    Summary

    • After click on a service name in a cluster tree you will see RavenDB service information
      Figure 3: FMC Configuration
    • Service properties
      Figure 4.1: FMC Configuration
      • General options
        Figure 4.2: FMC Configuration
      • Failover options
        Figure 4.3: FMC Configuration
    • Failure simulation
      1. Right click on RavenDB resource and choose Simulate failure of this resource Figure 5.1: FMC Configuration
      2. During failover the resource has been moved to a different node and is in pending mode
        Figure 5.2: FMC Configuration
      3. Failover succeeded
        Figure 5.3: FMC Configuration
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