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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35 views

Recommended Design - Communication among Jenkins + Vault + App

Design A: CD tool communicate with Vault to fetch App secrets on its behalf Jenkins ( CD tool ) computes the Vault path according to the app/project & according to which environment the app will ...
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1answer
25 views

When should an application be copied to a new region?

I'm taking my first course For AWS cloud practitioner and I am curious: The case: I have a single, client-facing application hosted on an EC2 instance. Let's keep it simple and say it's brochureware, ...
4
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1answer
42 views

How to handle availability zones and failover with ansible? Is it even within the scope of ansible?

I am only getting started with ansible. I want to set up a new development infrastructure with the infrastructure as code principle. First thing I'll have to prove is a Jenkins instance with a few ...
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1answer
51 views

When setting up HashiCorp Vault in HA mode, is it normal that you have to unseal each Vault node?

My goal has been to setup Vault in HA mode. Based on the docs, I was under the assumption that if you had a node that is in 'standby' it would forward to the active node, thus not having to unseal (...
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1answer
42 views

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 ...
3
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1answer
59 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 ...
4
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2answers
349 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....
3
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1answer
93 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 ...
3
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1answer
2k 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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2answers
1k 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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1answer
28 views

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), ...
4
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1answer
113 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?
2
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2answers
870 views

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 ...
19
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2answers
3k views

Is cross-region replication 100% fool-proof for S3 region outages? [duplicate]

Amazon S3 has an option of cross-region replication which should be pretty fault-tolerant against region/zone outages. Does that mean those who are ranting about the outage did not make use of this ...
32
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2answers
553 views

What is a good strategy to keep my site online when S3 goes offline?

What is a good strategy to keep my site online when S3 goes offline? If S3 US East 1 goes offline, how should I have my app configured/structured to prevent that taking my entire site offline? What ...