add variables for custom source AMI owner, ssh interface, IAM profile, and subnet#654
Open
add variables for custom source AMI owner, ssh interface, IAM profile, and subnet#654
Conversation
harishxr
requested changes
Mar 18, 2026
pjaudiomv
force-pushed
the
feat/custom-source-ami-support
branch
2 times, most recently
from
5046494 to
79e6fa8
Compare
harishxr
approved these changes
Mar 18, 2026
auto-merge was automatically disabled
March 18, 2026 23:51
Head branch was pushed to by a user without write access
pjaudiomv
force-pushed
the
feat/custom-source-ami-support
branch
from
79e6fa8 to
ccbe0fa
Compare
harishxr
previously approved these changes
Mar 19, 2026
TheanLim
reviewed
Mar 20, 2026
TheanLim
reviewed
Mar 20, 2026
TheanLim
reviewed
Mar 20, 2026
TheanLim
reviewed
Mar 20, 2026
auto-merge was automatically disabled
March 20, 2026 22:33
Head branch was pushed to by a user without write access
…, and subnet Change log update rm changelog entry packer fmt update variable descriptions simplify logic
pjaudiomv
force-pushed
the
feat/custom-source-ami-support
branch
3 times, most recently
from
153ac9c to
e036790
Compare
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
3 participants
Add this suggestion to a batch that can be applied as a single commit.This suggestion is invalid because no changes were made to the code.Suggestions cannot be applied while the pull request is closed.Suggestions cannot be applied while viewing a subset of changes.Only one suggestion per line can be applied in a batch.Add this suggestion to a batch that can be applied as a single commit.Applying suggestions on deleted lines is not supported.You must change the existing code in this line in order to create a valid suggestion.Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be applied on multi-line comments.Suggestions cannot be applied while the pull request is queued to merge.Suggestion cannot be applied right now. Please check back later.
Summary
Add four new optional variables to allow building ECS-optimized AMIs from a custom source AMI (e.g. a hardened/STIG compliant base) without modifying the templates. All variables default to the existing behavior, so this is a non-breaking change.
Implementation details
Four variables are added to variables.pkr.hcl:
source_ami_owners- replaces the hardcodedowners = ["amazon"]in eachsource_ami_filterblockssh_interface- replaces the hardcodedssh_interface = "public_ip"in each source blockiam_instance_profile- adds optional IAM instance profile support to the build instance; omitted when emptysubnet_id- adds optional subnet placement for the build instance; omitted when emptyThe corresponding source blocks in
al2023.pkr.hcl,al2023arm.pkr.hcl,al2023gpu.pkr.hcl, andal2023neu.pkr.hclare updated to reference these variables.Testing
Validated by building the AL2023 ECS-optimized AMI against a custom STIG-hardened Amazon Linux 2023 source AMI using SSM Session Manager (ssh_interface=session_manager) with a custom IAM instance profile and subnet. The default configuration (building from Amazon's official AMI over public IP) is unchanged.
New tests cover the changes:
Description for the changelog
Licensing
By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.