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Conditionally enable SSM Default Host Management Configuration
* By default, AWS Systems Manager doesn't have permission to perform actions on your instances. * Default Host Management Configuration allows Systems Manager to manage your Amazon EC2 instances automatically. * After you've turned on this setting, all instances using Instance Metadata Service Version 2 (IMDSv2) in the AWS Region and AWS account with SSM Agent version 3.2.582.0 or later installed automatically become managed instances. Benefits of managed instances include the following: * Connect to your instances securely using Session Manager. * Perform automated patch scans using Patch Manager. * View detailed information about your instances using Systems Manager Inventory. * Track and manage instances using Fleet Manager. * Keep the SSM Agent up to date automatically.
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,13 @@ | ||
| { | ||
| "Version": "2012-10-17", | ||
| "Statement": [ | ||
| { | ||
| "Sid": "", | ||
| "Effect": "Allow", | ||
| "Principal": { | ||
| "Service": ${services} | ||
| }, | ||
| "Action": "sts:AssumeRole" | ||
| } | ||
| ] | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,46 @@ | ||
| { | ||
| "Version": "2012-10-17", | ||
| "Statement": [ | ||
| { | ||
| "Effect": "Allow", | ||
| "Action": [ | ||
| "ssm:DescribeAssociation", | ||
| "ssm:GetDeployablePatchSnapshotForInstance", | ||
| "ssm:GetDocument", | ||
| "ssm:DescribeDocument", | ||
| "ssm:GetManifest", | ||
| "ssm:ListAssociations", | ||
| "ssm:ListInstanceAssociations", | ||
| "ssm:PutInventory", | ||
| "ssm:PutComplianceItems", | ||
| "ssm:PutConfigurePackageResult", | ||
| "ssm:UpdateAssociationStatus", | ||
| "ssm:UpdateInstanceAssociationStatus", | ||
| "ssm:UpdateInstanceInformation" | ||
| ], | ||
| "Resource": "*" | ||
| }, | ||
| { | ||
| "Effect": "Allow", | ||
| "Action": [ | ||
| "ssmmessages:CreateControlChannel", | ||
| "ssmmessages:CreateDataChannel", | ||
| "ssmmessages:OpenControlChannel", | ||
| "ssmmessages:OpenDataChannel" | ||
| ], | ||
| "Resource": "*" | ||
| }, | ||
| { | ||
| "Effect": "Allow", | ||
| "Action": [ | ||
| "ec2messages:AcknowledgeMessage", | ||
| "ec2messages:DeleteMessage", | ||
| "ec2messages:FailMessage", | ||
| "ec2messages:GetEndpoint", | ||
| "ec2messages:GetMessages", | ||
| "ec2messages:SendReply" | ||
| ], | ||
| "Resource": "*" | ||
| } | ||
| ] | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,30 @@ | ||
| resource "aws_iam_role" "ssm_dhmc" { | ||
| count = local.enable_ssm_dhmc ? 1 : 0 | ||
|
|
||
| name = "${local.project_name}-ssm-dhmc" | ||
| assume_role_policy = templatefile( | ||
| "${path.root}/policies/assume-roles/service-principle-standard.json.tpl", | ||
| { services = jsonencode(["ssm.amazonaws.com"]) } | ||
| ) | ||
| } | ||
|
|
||
| resource "aws_iam_policy" "ssm_dhmc" { | ||
| count = local.enable_ssm_dhmc ? 1 : 0 | ||
|
|
||
| name = "${local.project_name}-ssm-dhmc" | ||
| policy = templatefile("${path.root}/policies/ssm-dhmc.json.tpl", {}) | ||
| } | ||
|
|
||
| resource "aws_iam_role_policy_attachment" "ssm_dhmc" { | ||
| count = local.enable_ssm_dhmc ? 1 : 0 | ||
|
|
||
| role = aws_iam_role.ssm_dhmc[0].name | ||
| policy_arn = aws_iam_policy.ssm_dhmc[0].arn | ||
| } | ||
|
|
||
| resource "aws_ssm_service_setting" "ssm_dhmc" { | ||
| count = local.enable_ssm_dhmc ? 1 : 0 | ||
|
|
||
| setting_id = "arn:aws:ssm:${local.aws_region}:${local.aws_account_id}:servicesetting/ssm/managed-instance/default-ec2-instance-management-role" | ||
| setting_value = "${aws_iam_role.ssm_dhmc[0].name}" | ||
| } | ||
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