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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 with keepalived and nginx on ubuntu

I have two identical linux servers serving the same content through nginx. I want to have high availability through failover with keepalived, that is, server number 1 always serves the content of nginx whenever possible, if it crashes, server 2…
Miguel Duque
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Is it possible to deploy a high available file service with two file servers using a shared virtual hard disk and DFS with Windows Server 2019?

In my infrastructure, I have two servers with Windows Server 2019 and Hyper-V installed. A SAN is directly connected to both servers via FC. The SAN provides three volumes to both servers: a volume for the quorum, a volume for VMs and a volume for…
stackprotector
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How to replicate apache mod_jk session data

is it possible to replicate the mod_jk sticky session information to another apache for an failover setup? the idea behind the question is to setup two apaches with sticky sessions in front off some tomcats. when one apaches fails, the other one…
Christian
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implementing a failover service for containers

Two VMs are hosted on the same machine, let's name them VM1 and VM2. Both VMs are hosting a runC container running a server application, a client is running directly on the host machine and is connected to service running in the container in VM1. I…
y_159
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HA proxy is really needed?

I have the following infra : 3 servers which handle micros services. In front, I have one single proxy server which exposes services or website following the domain name. I would to improve this with loadbalancing on the proxy side. So my idea is…
FLAA
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Microk8s ( Kubernetes ) for Mysql High- Availability

I am trying to setup MySQL HA Database with Microk8s Kubernetes. The goal is to have MySQL running on all 3 nodes with 1 floating IP in between them, and that if any of the nodes bursts up in flames database continues to funciton. I have installed 3…
Perovic
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WSFC DNN Listener Resolving to secondary in Availability Group

I have an Azure AO AG which consists of three servers (all WS-2019 & SQL-2019CU3): A - Subnet 1 - Principal Server (Sync) B - Subnet 1 - Secondary Server (Sync) C - Subnet 2 - Secondary Server (Async) I have created a DNN Listener on the resource…
Lickrob
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CentOS 7 - GlusterFS & Pacemaker & Corosync

I try to install a little GlusterFS (for NFS) Cluster with CentOS High Availability. I have really no idea why it failed. I started multiple times from scratch. My problem is, that I can't see any error like "DNS unresolvable" or "connection…
j0k4b0
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Haproxy with MySQL Cluster Setup

I have 2 MySQL servers with master-master replication between them. The replication is working fine. I need to configure high availability between them so that if either one of them goes down, the other takes up. I'm following this…
ArkoD
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Need Restart OS Level After change virtual ip on keepalived

I am using keepalived for make HA current maxscale and using virtual IP on keepalived. If I change virtual IP on keepalived I must restart OS on VM or restart keepalived service only? I am still confused about that.
febry
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Network Resilience Design

I am trying to design multi-site network with resilience for the server farm and DMZ for both inbound and outbound resilience. The following resilience that i want to meet at the first place: 1.For Server that located in server farm, the outbound…
Hyperventilate
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How to use Apache resource by HTTPS in pacemaker?

I have a problem when i change apache url to HTTPS. Before the change every this working fine with http. Now my company need to use the Virtal ip by HTTPS. so that i didn't find any suitable tutorial about this issue. i am working on debian 9. more…
Karippery
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Demo a database mirroring on SQL Server, which choice is the best?

I'm going to demo a high-availability SQL Server database to my mentor. My current PC configurations are: Pentium E6300 2G of RAM Windows 7 Ultimate I planned to create 3 virtual machines by Microsoft Virtual PC, all of them install Windows Server…
Delta76
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How can I make High Availability in HP-UX?

We have a HP UX11 and our ERP software is running on Oracle. Now we want to buy another server hardware, and want to configure High Availability between this two. I don't want to install HP-UX manually on the new server, but I want the same OS and…
Sadiq ali
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HAProxy backend load balancing port being added

I'm trying to use HAProxy to load balance between backend servers, but for some reason the port of the backend server keeps getting inserted. Example: I connect to 192.168.1.1 (over port 80, since I'm trying to load a webpage from chrome). HAProxy…
forkwasher
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