cloudformation userdata

1. What is Userdata in CloudFormation?
2. What is Userdata in AWS?
3. Does Userdata run on reboot?
4. What are CloudFormation outputs?
5. Is AWS EBS free?
6. How do I deploy AWS CloudFormation?
7. How does AWS Userdata work?
8. What is cloud init used for?
9. What is the purpose of user data?
10. Does cloud init run every boot?
11. How do I run AWS scripts?
12. How do I find my cloud init log?

What is Userdata in CloudFormation?

The UserData property runs two shell commands: install the CloudFormation helper scripts and then run the cfn-init helper script. ... For example, you can use cfn-init and AWS::CloudFormation::Init to install packages, write files to disk, or start a service.

What is Userdata in AWS?

When you launch an instance in Amazon EC2, you have the option of passing user data to the instance that can be used to perform common automated configuration tasks and even run scripts after the instance starts. You can pass two types of user data to Amazon EC2: shell scripts and cloud-init directives.

Does Userdata run on reboot?

Subsequent reboots or starts

When you update instance user data, user data scripts are not run automatically when you reboot or start the instance.

What are CloudFormation outputs?

The optional Outputs section declares output values that you can import into other stacks (to create cross-stack references), return in response (to describe stack calls), or view on the AWS CloudFormation console. For example, you can output the S3 bucket name for a stack to make the bucket easier to find.

Is AWS EBS free?

Free Tier. AWS Free Tier includes 30GB of Storage, 2 million I/Os, and 1GB of snapshot storage with Amazon Elastic Block Store (EBS).

How do I deploy AWS CloudFormation?

Testing typically involves the following steps:

1. Upload your templates to an S3 bucket.
2. Sign in to the AWS Management Console.
3. Open the AWS CloudFormation console.
4. Enter the S3 path to your parent template.
5. Manually enter parameter values.
6. Launch the stack.
7. Wait to see if the deployment succeeds or fails.

How does AWS Userdata work?

AWS userdata is the set of commands/data you can provide to a instance at launch time. For example if you are launching an ec2 instance and want to have docker installed on the newly launched ec2, than you can provide set of bash commands in the userdata field of aws ec2 config page.

What is cloud init used for?

Cloud-init is a proven method of bootstrapping your instances in the cloud and creating a standard environment for your workloads to run on, providing standardization and manageability.

What is the purpose of user data?

One of the most important applications of user data is to inform development and design decisions. Both explicit feedback provided from users and insight gained by interpreting user behavioral data from your site or application can provide guidance on how to improve your products.

Does cloud init run every boot?

By default, user data scripts and cloud-init directives run only during the first boot cycle when an EC2 instance is launched. However, you can configure your user data script and cloud-init directives with a mime multi-part file.

How do I run AWS scripts?

Run shell scripts from Amazon S3

1. In the navigation pane, choose Run Command. ...
2. Choose Run command.
3. In the Command document list, choose AWS-RunRemoteScript .
4. In the Targets section, identify the instances on which you want to run this operation by specifying tags, selecting instances manually, or specifying a resource group. ...
5. For Other parameters:

How do I find my cloud init log?

The default location for cloud init user data is already /var/log/cloud-init-output. log , in AWS, DigitalOcean and most other cloud providers. You don't need to set up any additional logging to see the output.