Open wincent opened 2 years ago
Stuff that may or will require manual intervention:
AMI root file system and default Amazon EBS volume type
The AL2023 AMI and Amazon Linux 2 both use the XFS file system on the root file system. For AL2023, the mkfsoptions for the root device file system are further optimized for Amazon EC2. AL2023 also supports a number of other file systems that you can use on other volumes to meet your specific requirements.
AL2023 AMIs use Amazon EBS gp3 volumes by default, whereas Amazon Linux 2 AMIs use Amazon EBS gp2 volumes by default. You can change the volume type when you launch an instance. For more information about Amazon EBS volume types, see Amazon EBS General Purpose Volumes. For more information about launching an Amazon EC2 instance, see Launch an instance in the Amazon EC2 User Guide for Linux Instances.
Task scheduling
In Amazon Linux 2 the cronie package was installed by default on the Amazon Machine Image (AMI), providing support for the traditional crontab way of scheduling periodic tasks. In AL2023, we use systemd timer units and cronie extensively. Support for crontab is no longer provided by default.
You can optionally install the cronie package to use classic cron jobs. We recommmend that you migrate to systemd timers due to the added functionality provided by systemd.
Package manager
The default software package management tool on AL2023 is DNF. DNF is the successor to YUM, the package management tool in Amazon Linux 2.
For more information, see Package management tool.
Extra Packages for Enterprise Linux (EPEL)
Extra Packages for Enterprise Linux (EPEL) is a project in the Fedora community with the objective of creating a large array of packages for enterprise-level Linux operating systems. The project has primarily produced RHEL and CentOS packages. Amazon Linux 2 features a high level of compatibility with CentOS 7. As a result, many EPEL7 packages work on Amazon Linux 2. However, AL2023 doesn't support EPEL or EPEL-like repositories.
Issues to watch:
With all the breaking changes, considering moving back to good ol' CentOS or Fedora. Remembering how big the move was to Amazon Linux 2...
See:
As per "Amazon Linux 2 FAQs":
Note that by the time I do this, it might be Amazon Linux 2025 instead of 2023, as per "Amazon Linux 2023 FAQs":
This issue supersedes:
Blocks:
Related: