Questions tagged [high-availability]

If a question is about preventing that a service goes down if one node is shutdown and needs to keep on running then this tag could be used.

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Maintaining constant VM number over multiple datacenters

I am working on a highly-available Kubernetes cluster. Basically, the idea is having two Kubernetes worker nodes (with same pods on each) in separate datacenters (say DC-1 and DC-2), and if one of ...
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161 views

Create MariaDB/MySQL HA Cluster on Kubernetes using master-master replication

I want to deploy high avaliable web apps that require a MySQL database on a multi note Kubernetes cluster. Having never deployed any SQL cluster, I learned that there are master-master and master-...
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If we are using Kubernetes do we need to implement HA on both the infrastructure and application level?

Is this something that's going to be covered at the application level with pod autoscaling? Or should we implement both horizontal pod autoscaling and infrastructure high availability within our cloud ...
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Do I need UCP layer 7 routing or can I configure this with nginx?

I have an application that I want to run in high availability and I am wondering if I need the Docker EE with UCP to configure the layer 7 routing or can I use nginx for this? I know I can use UCP, ...
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78 views

Zabbix on docker containers

I want to build highly available Zabbix service for my infrastructure. I am considering it on VMs or in containers. I already know the case of running Zabbix in VM, yet I am not aware of pros, and ...
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47 views

What are vertical scalability limits of JFrog Artifactory Pro?

The essential feature of JFrog Enterprise over JFrog Pro (X) is that it introduces high availability and site replication support. Obviously, operations in geographically distributed organizations ...
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170 views

How to create high availability databases?

With modern techniques, it's relatively trivial to create a clustered, high-availability solution for webservers by using docker (or comparable) to handle the front-end serving of pages to users. e.g....
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1answer
87 views

Mysql with Kubernetes

I am converting a webapp from monolithic to kubernetes based architecture. But how can mysql be persistent with data when we have 2 mysql pods in each of 2 differnet nodes? I think we can mount a ...
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1answer
1k views

How can I simulate failure of an AWS Availability Zone?

In order to test that our load balancers and Multi-AZ RDS instances are working the way I'd expect them to, I'd like to simulate failure of an AWS Availability Zone. Short of locating one of the ...
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856 views

Does HA-git exist?

For the second time in three months, bitbucket is down https://status.developer.atlassian.com/ Now I wonder whether HA-git is possible or we should switch. Thanks to this it will be hard to finish ...
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Measure service unavailability during upgrade

I am deploying a microservices - based application using an orchestrator (Rancher specifically). During the service upgrade (when new images are being pulled and services re-discover one another), ...
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104 views

Is making kubernetes masters schedulable a really bad idea?

It's a cash strapped start-up. What are the worst consequences of running only three nodes, three schedulable masters? Are there some ways can one mitigate against the risks?
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What are best practices for running Hashicorp's Vault in terms of high availability?

The Production Hardening document indicates how to harden Vault for production purposes, but what if Vault is run on for example Digital Ocean and the platform is unavailable or the disk gets ...