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.
Questions tagged [high-availability]
23 questions
34
votes
2 answers
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 are the best strategies to diversify in this sort…
jcolebrand
- 1,275
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20
votes
2 answers
Is cross-region replication 100% fool-proof for S3 region outages?
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 aspect?
Or is that cross-region replication is not…
Dawny33
- 2,816
- 3
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8
votes
2 answers
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 datacenters and setting fire to it (which probably…
Tim Malone
- 1,265
- 1
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5
votes
2 answers
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. for a LAMP stack, docker would handle the "A"…
Stack Tracer
- 151
- 3
5
votes
1 answer
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?
barrymac
- 257
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- 5
4
votes
1 answer
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 nodes for a Java dev team.
I want to do it correct…
dfsg76
- 207
- 1
- 6
3
votes
1 answer
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 with thousands developers and build processes…
Ta Mu
- 6,792
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3
votes
1 answer
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 volume but still if my server with the mounted volume…
ankk98
- 131
- 4
3
votes
2 answers
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 the work before the deadline...
What other options…
030
- 13,383
- 17
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- 178
2
votes
1 answer
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 be deployed (qa, staging, prod,...).
Jenkins uses…
Abdennour TOUMI
- 291
- 3
- 12
2
votes
1 answer
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), there is a small service outage.
What is the best /…
pkaramol
- 1,007
- 2
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2
votes
2 answers
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 corrupted?
030
- 13,383
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- 178
2
votes
1 answer
How can I set up Deployment to run at least one pod on each node?
I need to set my deployment to have at least one pod on each node so that the system will continue uninterrupted in case the node goes down. I can set this to run one pod per node with daemonset or podAntiAffinity. But what I really want is that…
Enes Uysal
- 23
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1
vote
1 answer
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, the database is in a volume attached to the…
ExcellentSP
- 113
- 4
1
vote
1 answer
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 (assuming the active node was already unsealed).…
xil3
- 113
- 6