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Questions tagged [availability-zone]

77 questions
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AWS: Can two private subnets in two AZs share the same NAT gateway?

I have one private subnet and one public subnet in one availability zone, and the same two subnets in another zone. Can I create one NAT gateway in one public subnet, and create two route tables for the two private subnets, which both point to this…
user788454
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Azure Functions: High Availability without double maintenance

The Consumption Plan for Azure Functions is quite ideal, with its pleasant pricing and automatic scaling. However, I haven't found much information about High Availability with such a plan. Let's consider a scenario. Imagine that, based on the load,…
Timo
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Matching aws ami and availability zone on terraform

When I create the VPC, I create a subnet in every availability zone. Then, when I create my application, I want to input the ami and the type of instance (e.g. t3a.nano). I want to avoid getting this error: Error: Error launching source instance:…
Vincent KERDRAON
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Do we have anything similar to Azure "Availability Set" in GCP and AWS

Context : We are prototyping a multi cloud deployment of our application (based on micro services). For balancing between high availability and co location we used "Availability Sets" feature in Azure. Which kind off ensures that Azure…
arunvg
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Will AWS transfer data between availability zones if I request data from RDS?

I have a Multi-AZ ECS cluster with EC2 instances and an Aurora RDS cluster with cross-az read replicas. I use the cluster URL for selecting data in RDS. Does the cluster automatically forward my request to the RDS in the same AZ, if it is possible?…
user1552545
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In AWS NLB when AZ goes down does related static IP change to other AZ?

AWS recently introduced NLB (Network load balancer) where EIP (Elastic IP) can be linked to a AZ (availability zone). It is recommended to have NLB over multiple AZs hence have multiple EIP linked to each. But what happens when one of the AZ goes…
vikramaditya234
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How to achieve Available zone aware for neutron-server

I have read the manual. http://docs.openstack.org/mitaka/networking-guide/adv-config-availability-zone.html it tell us how to support multi AZ for dhcp/l3 router service. But I still not know where the neutron server and qpid I will place in multi…
Joe
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Estimate network cost for cross AZ cassandra node heartbeat on AWS EC2?

We are now planning to launch a Cassandra cluster on AWS EC2. For the minimum, we plan to launch two nodes, each on a different availability zone (AZ) of the same region (us-east-1) to have better fault tolerance. But cross-AZ data transfer is $0.02…
Dichen
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How to setup a MongoDB replica set in EC2 US-WEST with only two availability zones

We are setting up a MongoDB replica set on Amazon EC2 in the us-west-1 region. This region only has two availability zones though. My understanding is that MongoDB must have a majority to work correctly. If we create 2 servers in zone us-west-1b and…
Justin
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Insufficient capacity in availability zone on AWS

I got the following error from AWS today. "We currently do not have sufficient m3.large capacity in the Availability Zone you requested (us-east-1a). Our system will be working on provisioning additional capacity. You can currently get m3.large…
kane
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See how many aws instances are in each availability zone

Is there a way to see how many instances are in a availability zone for AWS? I want to use the runInstances api to bring up instances but call it on the least loaded zone which I don't see a obvious solution to. Thanks.
user578086
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How to set availability zone for accessed EC2 object on AWS Java

I'm attempting to describe running ec2 instances that I'm using with the following code: DescribeInstancesResult describeInstancesRequest = ec2.describeInstances(); List reservations =…
Atma
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Count of Availability Zones in Each region in Azure for EventGrid , Event Hub

Any az cli command in general to get to know count (1?2?3?) of availability zones in a particular region of Azure? I am trying to get these details for EventGrid and event hub specifically..
ABC DEF
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AWS cross-AZ traffic - for private endpoint access

I have a k8 deployment in az2 , az4 and az6. The services deployed in these zones need to access a private endpoint configured to access third party service. The private endpoint can only be configured for az1 , az2 and az4. How can I setup a…
Faizal
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how to detect Availability zonal failure automatically

Are there any techniques available to automatically detect Availability zonal failure in Amazon Web Services? I tried Lambda function to check the status AZ but i want to try another way. Is there any other way to detect the failure…
Manoj
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