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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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ZFS-HA pool faulted with metadata corruption

I setup the ZFS-HA following the excellent description Github (see here). After extensive testing, I rolled the setup out to production using 5x12 disks in RAIDZ3 connected to two nodes using HBA Controllers. This ran quite smooth until last night…
Michael
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Some questions about xenserver HA

To start thank you for your future help :) I would like to know if it is possible to wrap my H.A as on my paint (excused me the quality of the drawing). I would also like to know how it goes with the ipv4 failover blocks in the case of an HA and a…
Araxy
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Setting up distributed fault tolerant storage at home

I am tired of worrying about data loss at home. My wife is a semi pro photographer, and essentially all of our family memories are digital (and we ought to convert the ones that are not). I am planning on setting up two systems to host the disks,…
Ronald Pottol
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Mixing Multi-Master Replication (MMR) with Linux-HA

I'm interested in using MMR (http://mysql-mmm.org/) for high availability and replication purposes. The problem is, I'm also interested in using Linux-HA for other services, such as Apache. The two overlap when it comes to certain things, such as…
imaginative
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how to cache contents in HAProxy

global log /dev/log local0 log /dev/log local1 notice chroot /var/lib/haproxy stats socket /run/haproxy/admin.sock mode 660 level admin stats timeout 30s user haproxy group haproxy daemon # Default SSL material locations ca-base…
Jose
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How to use Docker with HAProxy+Keepalived?

I want to practise in creation of high-available web-application using multiple Docker containers on one machine. I launch several web-servers within Docker containers. Say, three servers rest1, rest2 and rest3. I use Docker with HAProxy balancer,…
Charlie
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pacemaker corosync lsb resource script( Sybase database ASE server and backup server)

I'm trying to create a lsb resource with pcs on rhel7.2 The "sybase" script is about Sybase Database ASE Server and Backup Server Startup & Stop & Restart $ status script Before [root@pldbsv01 ~]# pcs status Cluster name: PLDBSV_CLUSTER …
Arthur Cheng
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Can Azure availability set span 2 regions (Dublin, Amsterdam)

Is it possible for 2 VMs to be provisioned in 2 different regions (West & North Europe) and still keep them in the same availability set? Is region the correct word to refer to the datacenter(s) in North Europe or should it be called sub-region?
Young Monk
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Distributed mirrored filesystem under FreeBSD

Can someone share their experience in building a distributed mirrored filesystem between multiple FreeBSD machines? I. e. we have two (three, four...) servers and special partition "part1" mounted on each of them. We make some changes on it on the…
Mikhail Efremov
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Pacemaker ocf:heartbeat:IPaddr on different subnets

I'm trying to add a Pacemaker virtual IP address; with it, the gateway, and the two VMs it serves on different subnets. I've only done this before with all IPs on the same subnet, and I need some help. I have two VMs on 200.xx.xxx.9 and…
jetboy
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Why Failover instead of Load Balancing for HA

From my understanding with failover clustering, only one machine is actually working, which means the other one(s) are sitting idle. So why would one use failover clustering instead of using a load balancing style with Windows Server 2012 to gain…
Jason
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VMware High Availability questions

I can't seem to find the answers to these questions within the vSphere 5 Documentation center, so please share if you are aware of any aspects of these questions. What happens to the failed VM that has been configured for High Availability (HA)?…
O_O
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Optimal configuration with Synology as HA iSCSI backend for vSphere

I'm looking into purchasing a new storage backend for our VMware vSphere Essentials package. We have 3 ESXi hosts, currently mainly using DAS. The goal is to upgrade to Essentials Plus this year, to leverage its extra power in High Availability and…
Niels Keurentjes
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Website high availability without load-balancer?

I'm considering options for changing a 'high availability' website that provides a service via an https api. The current setup is: Two self-contained VMs, from different cloud providers (AWS and RackSpace) One DNS load-balancer: this is where the…
user83664
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new hyper V High Avaliability setup and SMB 3.0 storage

I am looking at building an new 2012 R2 with Hyper V setup, everything has to be HP hardware. 2x HyperV 2012 R2 servers running 20-30 VMs. These will be dual 6 core xeons with 128gb of ram. 2x 2012 R2 back end storage servers running SMB 3.0 shares,…
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