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Questions tagged [high-availability]

High availability is an architectural consideration often involving degrees of redundancy to insure availability in case of system or component failure.

High availability is an architectural consideration often involving degrees of redundancy to insure availability in case of system or component failure. Highly available systems are commonly implemented in situations where the risk outweighs the cost.

Best practices such as change control, standardized procedures, and monitoring can also enable high availability.

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MySQL: Pacemaker cannot start the failed master as a new slave?

pacemaker-1.0.12-1 corosync-1.2.7-1.1 I'm going to setup failover for MySQL replication (1 master and 1 slave) follow this guide: https://github.com/jayjanssen/Percona-Pacemaker-Resource-Agents/blob/master/doc/PRM-setup-guide.rst Here're the…
quanta
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unable to destroy windows 2008 r2 failover cluster after SAN rebuild

I created a windows 2008 r2 failover cluster for a sql 2008 active/passive cluster. This two node cluster was using a SAN device for a quorum disk resource as well as MSDTC resource. Well....I decided to reconfigure the SAN device, but I didn't…
Zack
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How to make cronjobs high available?

What would be a good solution to make a failover pair that has multiple cronjobs running avoid running the processes twice? Either in failover, or by dividing the jobs between them, and of course being able to take over all jobs when one of the…
Bas Grolleman
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Prevent HAProxy from toggling back from fallback to master

We have Redis master-slave setup, and we want to fallback to the slave once the master failed. But if it has failed it should never toggle back, even if the master is online again. Is this possible?
grosser
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OpenVPN multiple servers on the same subnet, high availability

Hey everyone. Let me start by saying that my Linux experience isn't super awesome but I can usually find my way around things easily. Over at work we have an OpenVPN setup that's been due for some improvement for a while now. The main server (tap…
andre
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Can Exchange 2010 high availability be achieved with only 2 servers?

In Exchange 2010, you can define Database Availability Groups and have your mailbox database(s) automatically replicated between multiple servers, and you can have mailbox server which are members of a DAG also host other server roles, such as Hub…
Massimo
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bond slave interfaces not getting the same aggregator id on LACP

I have a bug on some servers where LACP (802.3ad) is not working. I have on all servers a bonding device bond0 with two eth slaves and each interface is plugged on a different swich, and both switches configured with LACP. Everything seems to be ok,…
Baptiste Mille-Mathias
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2 node cluster (active-passive) with Windows Server 2016

I'd like to create a 2 node cluster with 2 servers with Windows Server 2016 standard. My cluster should be in active-passive configuration without shared storage (SAN, iSCSI, etc.) without active directory I'd like to get a virtual IP passed…
Danilo7
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Does SQL server log shipping require a 2nd SQL license

Possible Duplicate: Can you help me with my software licensing question? I'm currently working on a high availability solution for SQL Server 2008. I have 2 servers with 1 license of standard edition SQL Server. Can you implement log shipping…
RyanW
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High availability Bastion host - Best practices, ELB, EIP?

I am currently trying to figure out a good configuration to make a Bastion host highly available. I want to meet the following targets: The bastion host(s) need to able to withstand a Availability Zone failure and ec2 instance failure. A small…
M. Glatki
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RDS 2012R2: RD Connection Broker HA - cannot connect to SQL

I have a brand new RDS environment I am trying to set up. I'm trying to follow this guide: https://msfreaks.wordpress.com/2013/12/09/windows-2012-r2-remote-desktop-services-part-1/ and have gotten pretty far, but I'm failing at the Configure RD…
ITKat
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How to create a high-availability application server?

I am working with some hardware units which uses mobile Internet to communicate to my application server. Initially, the hardware had a hard-coded IP address (load balancer) in the hardware for communication which was used to route the traffic to my…
anand
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Which STONITH hardware for power fencing?

I'd like to setup a two node high availability cluster using corosync/pacemaker/drbd. For that, of course, I need fencing. As far as I understand, all IPMI/iLO/... solutions do the job, but only as long as the chassis has power. In the case that…
C-Otto
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Can SQLite be used with GlusterFS?

I want to build a distributed storage based on GlusterFS with Automatic File Replication (AFR) to store users files in a fault-tolerant way. But I also want to access an SQLite3 database stored on the GlusterFS volume (and so replicated on several…
math
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Seeking distributed, fault-tolerant, networked block storage

I'm looking for a distributed, fault-tolerant network storage system which exposes block devices (not filesystems) on the clients. A client's block device should write simultaneously to several storage nodes A client's block device should not fail…
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