Top 20 AWS CodeDeploy Interview Questions and Answers

Software deployments to multiple compute services, including Amazon Elastic Compute Cloud (EC2), Amazon Elastic Container Service (ECS), AWS Lambda, and your on-premises servers, are automated via the completely managed deployment solution AWS CodeDeploy. By automating software deployments with CodeDeploy, human, prone to error processes are no longer necessary.

Ques. 1): With AWS CodeDeploy, what kinds of apps may be deployed?

Answer:

Any kind of programme can be deployed with AWS CodeDeploy. The files to copy and the scripts to run on each instance during the deployment are specified when using AWS CodeDeploy. Because AWS CodeDeploy supports any custom deployment logic, regardless of the programming language or architecture used, scripts can be used.

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Ques. 2): What platforms is AWS CodeDeploy compatible with?

Answer:

Numerous different operating systems are supported by AWS CodeDeploy. Agents are available from AWS CodeDeploy that have been tried out on Red Hat Enterprise Linux, Amazon Linux, Ubuntu Server, and Microsoft Windows Server. The AWS CodeDeploy agent is free source software, so you can use it with other operating systems.

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Ques. 3): What exactly is AWS CodeDeploy?

Answer:

AWS CodeDeploy is a service that automates the deployment of code to any instance, including instances hosted on-premises and in Amazon EC2. You can deliver new features more quickly, avoid downtime during deployment, and handle the complexity of updating your apps with AWS CodeDeploy. By automating deployments, AWS CodeDeploy eliminates the need for labor-intensive manual processes. The service scales with your infrastructure, allowing you to quickly deploy to one instance or thousands.

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Ques. 4): What distinguishes Amazon CodeDeploy from other AWS management and deployment tools like AWS Elastic Beanstalk and AWS OpsWorks?

Answer:

AWS CodeDeploy is a building block tool designed to assist developers in deploying and updating software on any instance, including instances running on-premises and through Amazon EC2. End-to-end application management solutions are provided by AWS Elastic Beanstalk and AWS OpsWorks.

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Ques. 5): What is a deployment group?

Answer:

The AWS CodeDeploy entity for grouping EC2 instances or AWS Lambda functions in a CodeDeploy deployment is called a deployment group. You target a set of instances connected to an application while using EC2 for deployments. By naming an Auto Scaling group, a tag, or both, you can add instances to a deployment group. In an Amazon Lambda deployment, a deployment group specifies a set of AWS CodeDeploy configurations, such as alarms and rollbacks, for upcoming serverless Lambda deployment to the group.

An application can have numerous deployment groups, such as staging and production. See Dealing with Amazon EC2 Tags in the Console for more details on tags.

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Ques. 6): What are the typical processes involved in utilising AWS CodeDeploy to launch an application?

Answer:

The common steps taken during a deployment are depicted in the diagram below. The first setup step for each application is often creating an application and a deployment group (for definitions of these words, see the Concepts section). Uploading a revision and deploying it are repeatable tasks.

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Ques. 7): How can I use AWS CodeDeploy to deploy an application from my source control system?

Answer:

If you use GitHub, you can publish a revision from your repository straight to instances in.zip,.tar, or.tar.gz format. When deploying code from other source control systems, you can provide the Amazon S3 location and bundle the revision and upload it to an Amazon S3 bucket in a.tar.gz,.zip, or.tar.xz format. Make sure the post-build artefacts are present in the GitHub repository or the Amazon S3 bucket if your application requires a build phase.

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Ques. 8): How does Auto Scaling integrate with AWS CodeDeploy?

Answer:

To guarantee that freshly started instances always receive the most recent version of your application, you can join an Auto Scaling group with a deployment group. Each time an Amazon EC2 instance for that Auto Scaling group is launched, it is first placed in a Pending state before the deployment of the most recent successful revision for that deployment group is triggered on that Amazon EC2 instance. The Amazon EC2 instance's state is updated to InService if the deployment is successful. A new Amazon EC2 instance is launched in the Pending state and a deployment is initiated for the newly launched EC2 instance if the deployment fails.

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Ques. 9): Can I manage access to AWS CodeDeploy using AWS Identity and Access Management (IAM)?

Answer:

Yes. Resource-level permissions are supported by AWS CodeDeploy. You can select which user has access and to what actions for each AWS CodeDeploy resource. For instance, you can configure an IAM policy to only allow users to list revisions for other apps while allowing users to install a specific application. Hence, you may stop users from unintentionally changing the incorrect programme.

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Ques. 10): How are AWS CodeDeploy applications distributed across many regions?

Answer:

When performing deployments, AWS CodeDeploy uses AWS resources in the same area. Create the application in each of your target locations, copy the application bundle to an Amazon S3 bucket there, and then begin the deployments using either a serial or parallel rollout across the regions to spread the deployments out.

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Ques. 11): Can my current tool chain work with AWS CodeDeploy?

Answer:

Yes. Many configuration management, continuous integration, and deployment, as well as source control solutions are compatible with AWS CodeDeploy.

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Ques. 12): How do revisions work?

Answer:

A revision is a particular version of deployable material, which includes an AppSpec file, source code, post-build artefacts, web pages, executable files, and deployment scripts. A revision can be accessed via the AWS CodeDeploy Agent from GitHub or an Amazon S3 bucket.

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Ques. 13): What is a deployment configuration?

Answer:

A deployment configuration outlines the actions that should be taken during deployment, including how to deal with failure, through the use of a deployment group. To deploy with zero downtime to multi-instance deployment groups, you can utilise a deployment configuration. You can define this in your deployment configuration, for instance, if your application requires at least 50% of the instances in a deployment group to be active and handling traffic, preventing downtime from a deployment. Amazon CodeDeploy will deploy to one instance at a time by default if no deployment setting is linked to either the deployment or the deployment group.

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Ques. 14): How will my configuration management tool and AWS CodeDeploy interact?

Answer:

Your configuration management tool can be launched from any AppSpec file deployment lifecycle event hook. For instance, you can define a Chef recipe that you wish to execute as part of a deployment in the relevant AppSpec file deployment lifecycle event hook. The AWS CodeDeploy agent can also be installed on instances using your configuration management tool. for examples that demonstrate integrating configuration management tools like Chef, Puppet, Ansible, and Saltstack with AWS CodeDeploy.

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Ques. 15): How can I keep track of a deployment's progress?

Answer:

The Amazon Management Console, AWS Command Line Interface (AWS CLI), AWS SDKs, and AWS CodeDeploy APIs can all be used to monitor the progress of a deployment.

You may view the general deployment status and then drill down to view the status of every instance and every deployment lifecycle event for the instance. Also, you can examine the log entries associated with every failure, which makes it simple to troubleshoot deployment difficulties without logging into the instance.

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Ques. 16): How can I get notified or alerted when something happens in AWS CodeDeploy?

Answer:

Events that affect your deployments can have notifications created for them. Amazon SNS notifications will be used for notifications. Each notification will have a link to the resources whose event caused it, along with a status message. There is no additional price for notifications, but you can be charged for other AWS services that notifications uses, including Amazon SNS. Consult the alerts user guide to understand how to get started. Customers can also set up notifications to go to their Slack channels or Amazon Chime chat rooms when utilising the AWS Chatbot.

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Ques. 17): An application is what?

Answer:

A group of instances can be served by deploying an application, which is a bundle of software and configuration. The instances in the group often use the same programme. For instance, if you have a sizable distributed system, it's likely that the web layer will be one application and the data tier will be another.

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Ques. 18): What is an AppSpec file?

Answer:

An AppSpec file is a configuration file that details the scripts to run and the files to copy. You place the YAML-formatted AppSpec file in the root directory of your revision. The AppSpec file has two sections and is used by the Amazon CodeDeploy Agent. The source files in your revision that will be copied as well as the final destination folder are specified in the files section for each instance. The location of the scripts to run during each stage of the deployment is specified in the hooks section as relative paths beginning at the revision bundle's root. A deployment lifecycle event is the name given to each stage of a deployment.

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Ques. 19): What modifications must I make to my code before using AWS CodeDeploy?

Answer:

Your code doesn't require any modifications. You only include a configuration file (known as an AppSpec file) in the revision bundle's root directory that lists the files to copy and the scripts to run.

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Ques. 20): How can I restore a previously revised application?

Answer:

You only need to deploy the prior revision in order to roll back an application to it. There is no distinction between redeploy and roll back because AWS CodeDeploy keeps track of the files that were copied for the current version and deletes them before beginning a new deployment. You must, however, confirm that it is possible to roll back the prior updates.

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Top 20 AWS CodeCommit Interview Questions and Answers

AWS CodeCommit is a managed source control solution that is safe, scalable, and makes it simpler for teams to work together on code. You no longer have to manage your own source control system or be concerned about scaling its infrastructure thanks to AWS CodeCommit. AWS CodeCommit integrates smoothly with your current Git tools and may be used to save anything from code to binary files.

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Ques. 1): Amazon CodeCommit should be used by who?

Answer:

Software developers who require a safe, dependable, and scalable source control solution to save and version their code can benefit from AWS CodeCommit. Additionally, anyone searching for a user-friendly, fully managed, version-controlled data repository can use AWS CodeCommit. IT managers, for instance, can store their scripts and setups using AWS CodeCommit. AWS CodeCommit can be used by web designers to store HTML pages and photos.

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Ques. 2): How do I make changes to the files in my repository?

Answer:

Either use Git to interact with the repository, or edit your files directly from the CodeCommit shell. To create a local copy of the AWS CodeCommit repository, for instance, use the git clone command in Git. When you're ready to save the modifications, make changes to the local files and then use the git commit command. To upload the modifications to the AWS CodeCommit repository, use the git push command.

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Ques. 3): Describe Git.

Answer:

Git is a distributed version management system that is open-source. You can use the Git command line interface (CLI) or any of the available Git clients to interact with AWS CodeCommit repositories.

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Ques. 4): How do I make a repository backup?

Answer:

You can utilise a local copy of the repository that you created by performing a complete git clone to restore data. There are numerous ways to create additional backups. Installing Git on your backup server and running a scheduled task that use the git clone command to routinely take snapshots of your repository are two options. If you simply want to transfer the incremental changes, you can use git pull rather than git clone. Keep in mind that depending on how you configure the backup server and the polling frequency, these activities could result in extra user and/or request charges.

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Ques. 5): Can I manage access to AWS CodeCommit using AWS Identity and Access Management (IAM)?

Answer:

Yes. Resource-level permissions are supported by AWS CodeCommit. You can choose which users are allowed to carry out certain tasks for each AWS CodeCommit repository. For a CodeCommit action, you can also provide AWS multi-factor authentication (MFA). This enables you to provide an additional layer of defence against damaging operations like removing repositories. You can define git pull and git push as actions to control access from Git clients in addition to the AWS CodeCommit APIs. By giving a user access to git pull but not git push, you can, for instance, create a read-only user for a repository.

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Ques. 6): What is the price of AWS CodeCommit?

Answer:

Each active user for AWS CodeCommit costs $1 per month. Your account is given an extra 10 GB of storage per month and 2,000 Git requests for that month for each active user. Storage and Git request allotments that have not been used do not roll over to subsequent months. Additional usage will be charged at $0.06 per GB-month and $0.001 each Git request if you need to provide your users with more storage or Git requests. Users are allowed to store an unlimited number of Git repositories. Every month, your usage is totaled across all locations, and the results are automatically applied to your bill.

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Ques. 7): What types of Git requests are counted towards the monthly budget?

Answer:

Any push or pull that sends repository objects is a "Git request." If there is no object transfer as a result of the local and remote branches being current, the request does not count towards your Git request allowance.

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Ques. 8): What distinguishes AWS CodeCommit from other source control solutions based on Git?

Answer:

AWS CodeCommit provides several capabilities that other Git source control systems do not, including:

AWS CodeCommit's fully managed service removes the need for you to host, manage, back up, and scale your own source control servers.

Amazon CodeCommit automatically encrypts your files while they are in transit and at rest for your security. Because Amazon CodeCommit and AWS Identity and Access Management (IAM) are connected, you may provide your repositories user-specific rights.

Strong Scalability, Redundancy, and Durability — AWS CodeCommit is built on AWS services that are strong scalability, redundant, and durable, like Amazon S3 and Amazon DynamoDB.

Scalable - There are no repository size restrictions with AWS CodeCommit, allowing you to save an unlimited amount of files.

Faster Development Lifecycle - AWS CodeCommit keeps your repositories close to your build, staging, and production environments in the AWS cloud. This allows you to increase the speed and frequency of your development lifecycle.

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Ques. 9): How can I get back an AWS CodeCommit repository that was deleted?

Answer:

An Amazon CodeCommit repository deletion is an irreversible harmful one-way operation. You must create the repository from scratch and upload the data using a backup or a local copy made from a full clone in order to restore a deleted repository. We advise utilising IAM policies in conjunction with MFA protection to limit the people who have access to deleting repositories.

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Ques. 10): With AWS CodeCommit, how can I establish webhooks?

Answer:

You can establish an SNS topic in the Amazon SNS console with the desired URL for the webhook and an HTTP endpoint. Then, using triggers, you can link that SNS topic to a repository event via the Amazon CodeCommit console. Customers can also set up notifications to go to their Slack channels or Amazon Chime chat rooms when utilising the AWS Chatbot.

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Ques. 11): Can I allow other accounts to access my repository?

Answer:

Yes. To grant IAM users in other Amazon accounts access to a repository, you can create an IAM role in your AWS account. Assuming the role while issuing commands, the IAM users can then configure their Amazon CLI to use AWS Security Token Service (STS).

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Ques. 12): How does a versioned S3 bucket compare to AWS CodeCommit?

Answer:

Software development teams can collaborate with AWS CodeCommit. It enables parallel branching, version differencing ("diffing"), and manages batches of changes across several files. Comparatively, Amazon S3 versioning allows for the recovery of previous iterations of a single file, but it lacks functionality for tracking batch changes across numerous files or for other aspects of collaborative software development.

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Ques. 13): I need this information for security analysis and operational troubleshooting. Can I acquire a history of AWS CodeCommit Git operations and API calls done in my account?

Answer:

Yes. On the AWS CloudTrail console, you may review recent CodeCommit activities, such as Git operations and API calls. You can make a trail and log events in an Amazon S3 bucket to keep a running log of events.

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Ques. 14): What does AWS CodeCommit's notion of an active user mean?

Answer:

Any distinct Amazon identity (IAM user/role, federated user, or root account) that has accessed AWS CodeCommit repositories through Git requests or the AWS Management Console throughout the month is considered to be an active user. An active user is a server that connects to CodeCommit using a distinct Amazon identity.

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Ques. 15): What protocols for communication does AWS CodeCommit support?

Answer:

You can communicate with AWS CodeCommit using either the HTTPS or SSH protocols, or perhaps both. Install the AWS CLI first before using HTTPS. A Git credential helper that can be customised with AWS credentials is installed by the AWS CLI. All HTTPS requests to AWS CodeCommit are automatically signed using the Signature Version 4 signing protocol. Users generate their own public-private key pairs and include their public keys with their IAM users in order to use SSH. The communication with AWS CodeCommit is encrypted using the private key.

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Ques. 16): Just how do I set up a repository?

Answer:

The Amazon Management Console, the AWS Command Line Interface (AWS CLI), the AWS SDKs, or the AWS CodeCommit APIs can all be used to build repositories.

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Ques. 17): How can I use AWS CodeCommit to encrypt my repository?

Answer:

At rest, repositories are always automatically encrypted. No consumer action is necessary. Repositories are encrypted by AWS CodeCommit using AWS Key Management Service (KMS). An Amazon-managed CodeCommit key is created under your AWS account when you create your first repository.

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Ques. 18): What steps must I take to import my current repository into AWS CodeCommit?

Answer:

Any existing Git repository can be imported into AWS CodeCommit using Git. You can use a Git importer to convert other repositories, such Subversion and Perforce, to Git first.

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Ques. 19): What ports in my firewall should I open to access AWS CodeCommit?

Answer:

You must enable port 22 (SSH) or port 443 for outbound access to an Amazon CodeCommit service endpoint (HTTPS).

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Ques. 20): What Git operations does AWS CodeCommit currently support?

Answer:

Currently, the commands clone, pull, push, and fetch are supported by AWS CodeCommit.