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[Security and Compliance]
A SysOps administrator is configuring an application on Amazon EC2 instances for a company Teams in other countries will use the application over the internet. The company requires the application endpoint to have a static pubic IP address.
How should the SysOps administrator deploy the application to meet this requirement?
To ensure that the application endpoint has a static public IP address, the SysOps administrator should deploy the application behind an internet-facing Network Load Balancer (NLB):
Network Load Balancer:
An NLB automatically provides a static IP address that can be associated with the load balancer. It supports static IP addresses for each Availability Zone and can handle a high number of requests per second.
Configuration Steps:
Create an internet-facing NLB and configure the target groups to point to the EC2 instances running the application.
Assign Elastic IP addresses to the NLB for a static public IP.
[Monitoring, Reporting, and Automation]
An AWS Lambda function is intermittently failing several times a day A SysOps administrator must find out how often this error has occurred in the last 7 days Which action will meet this requirement in the MOST operationally efficient manner?
To efficiently find out how often the AWS Lambda function has failed in the last 7 days, use Amazon CloudWatch Logs Insights.
Access CloudWatch Logs Insights:
Navigate to the CloudWatch console.
Select 'Logs Insights' from the navigation pane.
Select the Log Group:
Select the log group associated with the Lambda function.
Specify the time range for the last 7 days.
Run the Query:
Use a query to filter and count the occurrences of errors in the logs. For example:
sql
Copy code
fields @timestamp, @message
| filter @message like /ERROR/
| stats count() by bin(1d)
This query will count the number of errors per day in the last 7 days.
Using CloudWatch Logs Insights provides an efficient way to query and analyze log data, helping you quickly identify the frequency of Lambda function failures.
[Networking and Content Delivery]
A company has an Amazon Route 53 private hosted zone in its AWS account. The private hosted zone is connected to the company's on-premises data center by an AWS Direct Connect connection. Virtual machines (VMs) in the on-premises data center need to resolve DNS queries that exist in the private hosted zone.
What is the MOST operationally efficient solution that meets this requirement?
To enable on-premises resources to resolve DNS queries for records in a Route 53 private hosted zone, you can set up a Route 53 Resolver inbound endpoint. This allows DNS resolvers on your on-premises network to forward DNS queries to Route 53 Resolver via the inbound endpoint over the AWS Direct Connect connection.
By configuring your on-premises DNS resolvers to forward queries to the IP addresses of the inbound endpoint, your on-premises VMs can resolve DNS records in the private hosted zone efficiently and securely.
[Networking and Content Delivery]
A company operates compute resources in a VPC and in the company's on-premises data center. The company already has an AWS Direct Connect connection between the VPC and the on-premises data center. A SysOps administrator needs to ensure that Amazon EC2 instances in the VPC can resolve DNS names for hosts in the on-premises data center.
Which solution will meet this requirement with the LEAST amount of ongoing maintenance?
To resolve DNS names for on-premises resources from EC2 instances in a VPC, you use Amazon Route 53 Resolver outbound endpoints to forward DNS queries to on-premises DNS servers.
From the Route 53 Resolver documentation:
Resolver outbound endpoints allow DNS queries from resources in your VPC to be forwarded to DNS servers in your on-premises network over Direct Connect or VPN.
[Monitoring, Reporting, and Automation]
A company has created an AWS CloudFormation template that consists of the AWS: EC2 Instance resource and a custom Cloud Formation resource The custom CloudFormation resource is an AWS Lambda function that attempts to run automation on the Amazon EC2 instance.
During testing, the Lambda function fails because the Lambda function tries to run before the EC2 instance is launched
Which solution will resolve this issue?
DependsOn Attribute in CloudFormation:
The DependsOn attribute in AWS CloudFormation ensures that one resource is created only after another resource has been successfully created. In this case, it ensures that the EC2 instance is fully launched before the custom resource (the Lambda function) is executed.
Steps:
Update the CloudFormation template to include the DependsOn attribute for the custom resource.
Ensure that the custom resource references the EC2 instance.
Resources:
MyEC2Instance:
Type: AWS::EC2::Instance
Properties:
# EC2 properties
MyCustomResource:
Type: Custom::MyCustomResource
DependsOn: MyEC2Instance
Properties:
ServiceToken: !GetAtt MyLambdaFunction.Arn
# Other properties
AWS CloudFormation DependsOn Attribute
