payments-dashboard/terraform/iam_github_deploy.tf
Adam Moussa 0e3e95c240
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feat(infra): migrate payments-dashboard to HCP Terraform (PLAT-79) (#109)
* feat(infra): migrate payments-dashboard to HCP Terraform (PLAT-79)

Replace the mgmt SAM stack with a prod-only HCP workspace using the afterhours stub-plus-zip-CD seam so GitHub Actions owns function code and Terraform owns infrastructure.

* fix(infra): pin secret and CMK ARNs for bootstrap-plan

hcptf-bootstrap-plan cannot ssm:GetParameter or DescribeSecret, so the first plan must not data-source those values.

* fix(infra): add EIP describe and DynamoDB CMK grants for first apply

Scoped apply missed ec2:DescribeAddressesAttribute and kms Encrypt/Decrypt/GenerateDataKey on the table CMK.
2026-09-16 18:29:01 +00:00

103 lines
2.8 KiB
HCL

# GitHub Actions OIDC role for .github/workflows/deploy.yaml.
#
# Trust is pinned three ways: aud, sub to Environment prod (immutable and
# classic subject forms), and job_workflow_ref to deploy.yaml at
# refs/heads/main only. No v* tags until a later release ticket.
#
# Not a Lambda execution role: no permissions_boundary. Path /tf-managed/ so
# seahaven-hcptf-iam-management DenySelfMutation (role/githubdeploy-*) does not
# match.
data "aws_iam_policy_document" "github_deploy_assume" {
statement {
sid = "GithubDeployOidc"
effect = "Allow"
actions = ["sts:AssumeRoleWithWebIdentity"]
principals {
type = "Federated"
identifiers = [local.github_oidc_provider_arn]
}
condition {
test = "StringEquals"
variable = "token.actions.githubusercontent.com:aud"
values = ["sts.amazonaws.com"]
}
condition {
test = "StringEquals"
variable = "token.actions.githubusercontent.com:sub"
values = [
local.github_oidc_sub,
"repo:${var.github_repo}:environment:prod",
]
}
condition {
test = "StringEquals"
variable = "token.actions.githubusercontent.com:job_workflow_ref"
values = [
"${var.github_repo}/.github/workflows/deploy.yaml@refs/heads/${var.github_deploy_branch}",
]
}
}
}
resource "aws_iam_role" "github_deploy" {
name = local.deploy_role
path = "/tf-managed/"
description = "GitHub Actions Lambda deploy role for ${var.github_repo} Environment prod"
assume_role_policy = data.aws_iam_policy_document.github_deploy_assume.json
max_session_duration = 3600
}
data "aws_iam_policy_document" "github_deploy" {
statement {
sid = "ListArtifactsBucket"
effect = "Allow"
actions = [
"s3:GetBucketLocation",
"s3:ListBucket",
]
resources = [aws_s3_bucket.artifacts.arn]
}
statement {
sid = "UploadFunctionArtifacts"
effect = "Allow"
actions = [
"s3:GetObject",
"s3:PutObject",
]
resources = ["${aws_s3_bucket.artifacts.arn}/functions/*"]
}
statement {
sid = "UpdateFunctionCode"
effect = "Allow"
actions = [
"lambda:GetFunction",
"lambda:GetFunctionConfiguration",
"lambda:UpdateFunctionCode",
]
resources = [for fn in local.functions : "arn:aws:lambda:${var.aws_region}:${local.account_id}:function:${fn.function_name}"]
}
statement {
sid = "DeployParams"
effect = "Allow"
actions = [
"ssm:GetParameter",
]
resources = [
"arn:aws:ssm:${var.aws_region}:${local.account_id}:parameter${local.ssm_prefix}/deploy/*",
]
}
}
resource "aws_iam_role_policy" "github_deploy" {
name = "payments-dashboard-deploy"
role = aws_iam_role.github_deploy.id
policy = data.aws_iam_policy_document.github_deploy.json
}