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Questions tagged [availability-zone]

77 questions
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aws map between availability zone and zone name

From aws doc : An Availability Zone is represented by a Region code followed by a letter identifier; for example, us-east-1a. To ensure that resources are distributed across the Availability Zones for a Region, we independently map Availability…
Kumar Madduri
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How to simulate AWS Dynamodb outage within one availability zone

I want to test my dynamodb with one availability zone failure. The basic idea comes to my mind is that find out EC2 instance(s) which dynamodb is running on within an availability zone, and stop or terminated it/them or do something in security…
Gang
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Azure AKS - splitting node pool over multiple Availability Zones

I'm new to Azure so please bear with me! I'm looking to create a HA (99.99%) node pool for AKS. I am more familiar with AWS and availability zones, whereby I'd split the auto scaling group over 3 AZs and that would be that. It appears that Azure…
Robert Young
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Unable to add a new availability zone to an existing load balancer

Had created a Load balancer to added some EC2 instances to them and everything is working as expected. I cannot add a new availability zone to this load balancer. I need to add the new zone as an ec2 instance type that I want is not available in the…
Hemanth Sundareshan
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How can I spread 2 tasks between 2 ec2 instances in 2 different Availability zones?

I have a cluster, lets say my-cluster. It has 2 services running. Lets call them my-services. Each services has 1 tasks running. my-task1 and my-task2. The EC2 instances are launched by an autoscaling group which launches 2 EC2 instances. I am…
user3771782
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AWS Multi-AZ verification

I modified my RDS instance to "Multi AZ : Yes". My primary RDS instance is in us-west-1a and for multi-AZ the secondary zone is shown as us-west-1c. I wanted to verify if whatever changes I am making on my primary database are getting copied to the…
sagun
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Default zone of Virtual Machine in Azure

While deploying a VM in Azure. If I choose a region ex. "Central India" which is having support of Availability zone, but I am not choosing that option while deploying. Then what will be the default zone in which the VM get deployed? I think it will…
Tanmay Kanungo
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RDS having 3 subnets of one AZ in AWS

I have an existing RDS instance, from the RDS console, I see that the instance has a subnet group of 6 subnets -- of which, 3 subnets (A1, A2, A3) from us-east-1a and 3 subnets (B1, B2, B3) from us-east-1b. My question is, how can I tell exactly…
Kay
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How to optimise cost when architecting for high availability in a single region Multi AZ set up in AWS?

All, I designing an application with HA, that will be deployed across multiple AZs in a single region of AWS. Its come to my attention that (even after purchasing a reserved instance), AWS cannot provide a guarantee that an EC2 can be launched in…
user2595169
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How to confirm Multi-AZ for Postgres and Aurora Postgres in Amazon AWS

I want to use MultiAZ for Postgres and Aurora Postgres databases. In the Postgres database configuration tab it shows: Multi-AZ yes Secondary Zone ap-south-1a But I can't find any reader in the db list overview. Whereas in the Aurora Postgres it…
steros
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Azure availability zone ARM A parameter syntax

I am attempting to add availability zone into my VM arm template. Majority of times I don't want the VM to be in a zone as it is a single VM. So in my ARM template, I have defined the zone section as: "zones":[ …
Stuart Gordon
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How to simulate Availability Zone Outage on Azure Kubernetes Service?

Following are my queries: How to simulate Availability Zone Outage on Azure Kubernetes Service to verify incoming traffic switching is done to another zone ? Is there any way to figure out which Zone or which Node is currently receiving the…
Rohit Anand
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Auto-scaling Instances in multi-AZ environment

I am planning to build an auto-scaling group (ASG) in a multi-AZ (AZ = availability zone) network. Let's say that we ran some diagnostics and discovered that we need at least 8 instances for normal load, and 24 instances during peak times. Here's a…
awsuser2021
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Determine availability zone programmatically from EC2 instance

Can a running EC2 instance determine what Availability Zone it is running in, without using the AWS API? Perhaps there is a way to have EC2 pass this information in an environment variable or similar? I'm just hoping to build in a small amount of AZ…
Doradus
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Availability Zones and Load Balancer

I have a basic question with respect to how a load balancer works. I have a VPC created with 3 subnets one in each availability zone(us-west-2a,us-west-2b,us-west-2c) and a 4th subnet in the same availability zone us-west-2a. Now when I enable…
fledgling
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