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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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High Availability on DAS HPE

Anyone who can assist me? I currently have a DL360 Gen9 HPE server Directly attached to HPE MSA 2040 device (DAS). I now need to ensure HA on the server level, is it possible to have FO cluster (Hyper-V) on this platform without introducing a Fiber…
Msemane
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Corosync HA preventing split-brain scenario

I'm setting up a test system for self-teaching about load balancing and high availability and I'm curious about a configuration setting in Corosync and would like to know what you guys who have experience in it, have to say. The thing I'm…
StianM
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AWS CLI Elastic IP, IPv6

I have two AWS instances working in high availability. (I'm using keepalived) I have an Elastic IP associated, everything was a fine. I used this script so to change the instance IP in case o…
Thiago Souza
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vsphere network design for vsan and ft-enabled cluster

I am looking for some recommendations on the network design for my ha-ft and all-flash-vsan-enabled vsphere cluster. I've planed around vsphere a bit, but newbie to vsan and ha/ft. I've Googled and searched here on StackExchange, but I just can't…
Arthur
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Automatic recovery with discarded data from NetworkFailure-interrupted DRBD sync

Suppose I have two DRBD devices provisioned. When the second node connects, it syncs the data from the first (primary/master) node. During this sync, the primary node loses power. After the Primary node is lost and the original Secondary is the only…
javanix
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Shared storage between Virtual Machines

We're planning to set up HA apache servers in our virtual environment. The load balancing between the servers is working fine. The problem we face is the following: We'd like to have one physical storage for all of the apache servers (Thats where…
friedulman
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Openstack redundant architecture on three servers

I would like to deploy an Openstack architecture on three (super)servers in a way that if one of server is down the Openstack infrastructure is still functionning. What is the best way to deploy this ? Is deploying Control, Network and Compute…
SwissFr
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NAT gateway high availability - AWS

Would you configure a NAT gateway on every AZ for HA? Is that an overkill? It costs more than $500 a year of continuous running. It does make sense for a business critical system. You could create 2 NAT gateways on 2 AZs and have the third one use…
sethu
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Send PROXY protocol header from HAProxy

I've probably got lost in the masses of documentation on this subject, but I'm trying to configure my HAProxy process to send the PROXY protocol header as described at http://www.haproxy.org/download/1.8/doc/proxy-protocol.txt. This is because I am…
Wad
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Is SQL Server AlwaysOn in VM cluster not needed?

We have many SQL Server instances virtualized in Hyper-V and participating in AlwaysOn group. I don't know particular reasons behind decisions that led to this setup. This week I interviewed 15 administrators to our new vacancy. Majority of them…
v.karbovnichy
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gluster operations hangs when one node fail

I have 3 nodes gluster server. Most of mounts from it are readonly and are to localhost like: mount -t glusterfs localhost:/volume /mnt/mountpoint/ -o ro volume is type replicate with 3 replicas (one brick on every node) I've configured for volume…
undefine
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How to get High Availability if using SQL and a NAS?

In a scenario where we want to use a NAS as storage for a big (MS SQL) database, how would you handle the high availability if the mdf files are stored physically only in the NAS device?
Horaceman
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High availability of load balancers themselves

In all the articles that I have read in the internet about high availability of load balancer itself, an approach using virtual IP (VIP) is mentioned. In this approach, two load balancers will remain in active-standby mode. The active load balancer…
Saptarshi
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Make HAProxy re-relay a request to a failed server

I was wondering if there is a way with HAProxy to re-send a failed request to another server if the original server is down. We run a REST API on multiple servers behind multiple HAProxy instances. There is no balance affinity, balance is done…
Tigraine
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Best way to run OpenShift Origin in AWS

I'm trying to create a production-ready Openshift Origin environment in AWS. I have experience with Kubernetes and CoreOS and kube-aws just makes things easy. You generate assets, run CloudFormation template and you are all set. Nodes with userdata…
Dmytro Leonenko
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