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Questions tagged [availability-zone]

77 questions
26
votes
4 answers

Is there a way for cloudformation to query available zones for subnet creation?

I have a cloudformation script that attempts to create a VPC, with one subnet per AZ. When I run: aws ec2 describe-availablity-zones I get 4 zones returned: "AvailabilityZones": [ { "State": "available", "RegionName":…
chris
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22
votes
4 answers

ec2 error starting instances insufficient capacity

We have created an AWS EC2 instance in Asia Pacific (Mumbai) region on Shared Hardware rental type. We are trying to start an instance after shut down and we are getting pop up error stating instances insufficient capacity message on screen. On…
Balaraju M
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17
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4 answers

Multiple availability zones with terraform on AWS

The VPC I'm working on has 3 logical tiers: Web, App and DB. For each tier there is one subnet in each availability zone. Total of 6 subnets in the region I'm using. I'm trying to create EC2 instances using a module and the count parameter but I…
ColOfAbRiX
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17
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2 answers

AWS best practice: shall I have a NAT gateway in each AZ?

Since NAT gateway only have redundancy within a single AZ, if I want to have a public/private pair of subnets in every AZ for the purpose of multi-AZ redundancy, I should have a NAT gateway in every AZ, shouldn't I? Otherwise, if I have only one…
user788454
11
votes
5 answers

Where are AWS EC2 Availability Zones exactly?

I am trying to create a server with the lowest possible latency for my target audience. I get the difference between regions and Availability Zones (I think). It sounds like the Availability Zones are in different cities. Where are they exactly?
Parris
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6
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1 answer

CloudBees, Availability Zones and Disaster Recovery

What is the difference between what CloudBees calls a region-specific deployment and what they (and Amazon) call an availability zone? From what I can tell, CloudBees allows you to deploy in 1 of 2 regions/zones: USA and Europe. Are those my only…
user1768830
5
votes
2 answers

Can EKS worker nodes be setup in different regions

We are currently designing a micro-services based architecture, by dividing monolith app to microservices. Earlier, the monolith was present in 2 different regions viz. US and Asia. US instances would get request from USA and Asia ones will get…
azaveri7
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5
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1 answer

Is AWS Glue Connection a Single Point of Failure?

To create a Glue Connection Resource we can just pick one AZ/Subnet form the account VPC. Does it mean if that AZ goes down the Glue jobs that using that connection will fail? If yes how we can make it multi AZs to avoid a single point of failure?
Nisman
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4
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1 answer

Does the available EC2 instances types vary over availablity zones (in the same region)?

Amazon launched a third availability zone in Frankfurt: eu-central-1c From what I see, the third availability zone does not support all instance types that are available in the existing zones (eu-central-1a and eu-central-1b). I always assumed that…
Philipp Claßen
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3
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1 answer

Do 2 different Availability Zones in EC2 act as a WAN or a LAN?

I am trying to establish a RabbitMQ Cluster on EC2 over 2 availability zones. In its docs, RabbitMQ mentions to avoid network partition on the cluster nodes. Do 2 different Availability Zones in EC2 act as a WAN or a LAN? Can anyone direct me…
Bick
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2
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0 answers

Kubernetes Statefulset problem with Cluster Autoscaler and Multi-AZ

I have a EKS cluster with cluster autoscaler setup, spanning across three availability zones. I have deployed a Redis Cluster using helm and it works fine. Basically it is a statefulset of 6 replicas with dynamic PVC. Currently, my EKS cluster has…
Kent Ho
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2
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1 answer

Is it possible to get GCP's ANY distribution for Kubernetes GKE node pool?

I have a GKE Kubernetes cluster running on GCP. This cluster has multiple node pools set with autoscale ON and placed at us-central1-f. Today we started getting a lot of errors on these Node pools' Managed Instance Groups saying that us-central1-f…
Mauricio
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2
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1 answer

No Availability Zones available in Azure North Central US Region

I'm deploying a global networking solution and using Terraform as my IaC solution. I have ExpressRoutes, VPN Gateways, Vnet-to-Vnet connections etc. I've deployed a VPN Gateway in Azure North Central US and now when I come to deploy and IP address…
Architect Jamie
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2
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1 answer

Availability Set in Availability Zone Azure

I’ve read somewhere that availability sets can be deployed in availability zones, however I can’t find the doc again. Now I cannot find the doc and can’t find anywhere to validate what was written. So my question is can an availability set be…
Norrin Rad
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2
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1 answer

AWS ElastiCache Redis - All nodes in one AZ to avoid data transfer costs

I'm setting up an ElastiCache Redis cluster, however event when disabling the Multi-AZ option the nodes are being distributed across multiple AZs. I want them to be in the same AZ as my EC2 nodes to avoid data transfer costs. It also seems…
numX
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