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There is no need for stop all nodes and removing ring data. Cluster operation like joining nodes can be done after marking as down the stopped claimant node. Example steps for 3-node cluster and claimant failure is as follows: https://gist.github.com/shino/dd9a75e84b2b5792a079 .


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When upgrading from one major or minor version of RabbitMQ to another (i.e. from 3.0.x to 3.1.x, or from 2.x.x to 3.x.x), or when upgrading Erlang, the whole cluster must be taken down for the upgrade (since clusters cannot run mixed versions like this). This will not be the case when upgrading from one patch version to another (i.e. from 3.0.x to 3.0.y); ...


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This is not a direct answer to your question, just a brief list of some potential alternatives. As others have said, if you don't have shared storage there's no point in having a failover cluster. You do have the option of shared-nothing live migration. You can freely move your virtual machines between hosts, provided you have the resources to do so, ...


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PAC Manager would be the best tool I have ever used. PAC support several connection type inside a tabbed environment and has the ability to export/import connection details for the sake of portability. There is also Monocaffe Connections Manager which provides a somewhat similar functionanlity.


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Some form of shared storage is required in order to build a Hyper-V failover cluster; however, it doesn't necessarily have to be a SAN: any server acting as an iSCSI target will work fine, and Windows Server 2012 even introduced the possibility of using SMB shares to store VMs.


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Windows Failover Clustering (which is what Hyper-V uses for clustering) requires shared storage of some sort. Further to Massimo's answer, and if I'm reading this page right, I don't think you can use exclusively SMB shares for a failover cluster. You'd still need some shared disks (SAS, iSCSI, FC) for the cluster portion, but you can store the Hyper-V VM ...


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Assuming this is a basic HTTP app the best way to register and deregister services with a load balancer is with an Elastic Load Balancer (ELB). Since you are already using an ASG this can be configured to be done automatically. You can also specify the number of health checks that must pass before a node is put into service and the number that must pass ...


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I fixed it by uncommenting status URL in httpd.conf and creating resource this way. Make sure though http://localhost/server-status is accessible before adding resource pcs resource create httpd apache configfile="/etc/httpd/conf/httpd.conf" statusurl="http://localhost/server-status" op monitor interval=5s --group zabbix-cluster


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The httpd resource does appear to be running (based on the pcs status output you've shown). Perhaps something stopped the service while Pacemaker was monitoring it, which would throw the error you see above, and trigger a recovery. If you grep your logs (on the DC: "Current DC: vda-zabserver-b - partition with quorum") for "LogActions", you should see any ...


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The use of glusterfs would depend on the storage backend that you are using. As a cluster file system it is intended to cluster physical storage so it appears as one large continuous volume. This official quick start guide has a good explanation of the process. In the event that your setup utilizes two or more separate backend storage servers or ...


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I'd go with galera + maxscale + haproxy. Our setup is 3 galera nodes, 2 maxscale + 2 haproxy nodes giving an active-passive failover for maxscale - a few points to be aware of with this setup (or any galera + maxscale). Galera recommends a single node for writing - trying to write to more than one node can lead to write conflicts. This is typically ...


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what will happen if one server becomes isolated from the other servers but still has clients connected? The isolated server becomes not read or writeable and will when the isolation ends get itself back in sync using one of the other nodes. What happens if two servers can't directly communicate but the third server can talk with both servers? Its ...


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I'm guessing you don't have your cluster quorum set correctly, so the cluster goes down when one of the two nodes goes down. Configure a file share witness for your quorum (e. g. http://blogs.technet.com/b/askpfeplat/archive/2012/06/27/clustering-what-exactly-is-a-file-share-witness-and-when-should-i-use-one.aspx) and you should be in better shape.


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Gluster is an open source distributed file system that has been used in HPC cluster environments. Lustre is another parallel filesystem that is widely used in HPC clusters, and there are several different implementations.


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Based on the environment that you are describing and some information that can be found by digging through the link you provided it sounds like the cluster you are using is provisioned as a diskless or stateless system, which means that the entire operating system is loaded into memory from an OS image that is stored remotely. Ensuring that parallel jobs ...


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I believe the latest versions of Windows Server to support Failover Clustering on Standard Edition - namely Windows Server 2012, and Windows Server 2012 R2.


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The sDRS schedules are regular vCenter scheduled tasks. There are few blog posts available on how to list these with PowerCLI, e.g. here: https://virtualbyte.wordpress.com/2014/09/05/retrieve-vcenter-scheduled-task-with-powercli/ http://rvdnieuwendijk.com/2013/01/19/get-vmware-vcenter-scheduled-tasks-with-powercli/ I personally like this one liner from the ...


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No, you cannot have multiple vCenter servers managing the same hosts at the same time. In KB1024051 the supported HA options for vCenter are outlined. New in version 6.0 is the option to use Microsoft Clustering for the Windows version of vCenter which probably provides the best availability, but also introduces the highest possible complexity.



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