Rapyder Cloud Solutions AWS Devops Engineer Interview Questions, Process, and Tips

A launch template is a pre-configured set of Amazon Machine Images (AMIs), instance types, and other settings used to launch EC2 instances.

• Launch templates simplify the process of launching EC2 instances by providing a pre-configured set of settings.

• They can be used to launch instances in an Auto Scaling group or individually.

• Launch templates can be versioned and updated to reflect changes in the desired configuration.

• ...read more

Autoscaling in AWS automatically adjusts the number of EC2 instances in a group based on demand.

• Autoscaling groups are created and configured with minimum and maximum number of instances.

• Scaling policies can be defined to adjust the number of instances based on metrics like CPU utilization or network traffic.

• Autoscaling can be triggered manually or automatically based on CloudWatch alarms or scheduled events.

• Autoscalin...read more

Autoscaling was implemented based on CPU utilization and network traffic.

• Autoscaling was implemented to ensure that the application can handle sudden spikes in traffic.

• CPU utilization and network traffic were used as metrics to trigger autoscaling.

• The minimum and maximum number of instances were set based on the expected traffic.

• Load testing was done to determine the optimal scaling thresholds.

• Autoscaling policies were...read more

A NAT gateway is a managed network address translation service provided by AWS.

• It allows instances in a private subnet to connect to the internet or other AWS services.

• It provides better availability and bandwidth than a NAT instance.

• It automatically scales to meet traffic demands.

• It can be used to reduce the attack surface of instances in a private subnet.

• It can be used to access resources in a VPC from a remote netwo

NAT gateway is used to provide internet access to private subnets while internet gateway is used to provide internet access to public subnets.

• NAT gateway is used for outbound traffic while internet gateway is used for inbound and outbound traffic.

• NAT gateway is associated with a private subnet while internet gateway is associated with a public subnet.

• NAT gateway performs network address translation while internet gatew...read more

To build and push a docker image to ECR, we need to create a Dockerfile, build the image, tag it, login to ECR, push the image to ECR.

• Create a Dockerfile with necessary configurations

• Build the image using docker build command

• Tag the image using docker tag command

• Login to ECR using AWS CLI command aws ecr get-login-password

• Push the image to ECR using docker push command

To troubleshoot a dying docker container, we can use logs, inspect the container, and check resource usage.

• Check container logs using 'docker logs ' command

• Inspect the container using 'docker inspect ' command to check its status and configuration

• Check resource usage using 'docker stats ' command to see if it's running out of memory or CPU

• Restart the container using 'docker restart ' command if necessary