What type of data can be passed as user data in EC2?
You can pass two types of user data to Amazon EC2: shell scripts and cloud-init directives. You can also pass this data into the launch wizard as plain text, as a file (this is useful for launching instances using the command line tools), or as base64-encoded text (for API calls).
What is instance user data?
User data is the set of commands you can provide to an instance at launch time. Once the instance is launched, it executes the user data script with root privileges. Every instance has access to its own User data using curl command from the instance to http://169.254.169.254/latest/user-data.
Where is user data stored on EC2?
This is stored in a file at /usr/local/aws/ec2-macos-init/instances//userdata .
Which Uri do we use to retrieve user data from within a running instance?
The IPv6 address is only accessible on Instances built on the Nitro System. To retrieve user data from within a running instance, use the following URI. A request for user data returns the data as it is (content type application/octet-stream ).
What user does cloud init run as?
1 Answer. Ubuntu cloud-config runs as root.
Does user data run on reboot?
3 Answers. To quote User data and shell scripts: By default, user data scripts and cloud-init directives run only during the boot cycle when you first launch an instance. You can update your configuration to ensure that your user data scripts and cloud-init directives run every time you restart your instance.
How do I find my ec2 instance data?
6 Answers
- SSH on launch EC2 instance.
- Check log of your user data script in. /var/log/cloud-init.log and. /var/log/cloud-init-output.log.
What is instance data?
Instance data is defined in the data division in the object paragraph of a class definition and is processed by procedural code in the instance methods of that class. Instance data is organized into logical records and independent data description entries in the same manner as program data.
What is user data?
That means disclosing your app’s access, collection, use, and sharing of the data, and limiting the use of the data to the purposes disclosed. …
What is instance metadata and user data in ec2?
Instance metadata is data about your instance that you can use to configure or manage the running instance. Instance metadata is divided into categories, for example, host name, events, and security groups. You can build generic AMIs and use user data to modify the configuration files supplied at launch time.
What is ec2 user in AWS?
Each Linux instance launches with a default Linux system user account. The default user name is determined by the AMI that was specified when you launched the instance. For Amazon Linux 2 or the Amazon Linux AMI, the user name is ec2-user . For a CentOS AMI, the user name is centos or ec2-user .
What is cloud-init used for?
You can use cloud-init to install packages and write files, or to configure users and security. Because cloud-init is called during the initial boot process, there are no additional steps or required agents to apply your configuration.