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Separate to multiple file Rename back to private and front to public Use The NAT gatway managed by AWS Use VPC DHCP option Use ENI for Bastion with DNS Health check Support for extra user data
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,127 @@ | ||
| # bastion configuration | ||
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| resource "aws_eip" "bastion" { | ||
| count = "${var.azs_count}" | ||
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| # count = "${length(aws_network_interface.bastion.*.id)}" | ||
| network_interface = "${element(aws_network_interface.bastion.*.id,count.index)}" | ||
| vpc = true | ||
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| lifecycle { | ||
| create_before_destroy = true | ||
| } | ||
| } | ||
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| resource "aws_network_interface" "bastion" { | ||
| count = "${var.azs_count}" | ||
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| # count = "${length(aws_subnet.public.*.id)}" | ||
| subnet_id = "${element(aws_subnet.public.*.id,count.index)}" | ||
| description = "${var.cluster_name}_bastion endpoint for ${element(aws_subnet.public.*.availability_zone,count.index)}" | ||
| security_groups = ["${aws_security_group.allow_bastion_ingress.id}"] | ||
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| tags { | ||
| Name = "${var.cluster_name}_eni-bastion-${element(aws_subnet.public.*.id,count.index)}" | ||
| cluster = "${var.cluster_name}" | ||
| product = "${var.tag_product}" | ||
| purpose = "${var.tag_purpose}" | ||
| builder = "terraform" | ||
| } | ||
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| lifecycle { | ||
| create_before_destroy = true | ||
| } | ||
| } | ||
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| resource "aws_autoscaling_group" "bastion" { | ||
| name = "${var.cluster_name}_bastion" | ||
| max_size = 1 | ||
| min_size = 1 | ||
| desired_capacity = 1 | ||
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| health_check_grace_period = 120 | ||
| health_check_type = "EC2" | ||
| force_delete = true | ||
| launch_configuration = "${aws_launch_configuration.bastion.name}" | ||
| vpc_zone_identifier = ["${aws_subnet.public.*.id}"] | ||
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| tag { | ||
| key = "Name" | ||
| value = "${var.cluster_name}_bastion" | ||
| propagate_at_launch = true | ||
| } | ||
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| tag { | ||
| key = "builder" | ||
| value = "terraform" | ||
| propagate_at_launch = true | ||
| } | ||
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| tag { | ||
| key = "cluster" | ||
| value = "${var.cluster_name}" | ||
| propagate_at_launch = true | ||
| } | ||
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| tag { | ||
| key = "product" | ||
| value = "${var.tag_product}" | ||
| propagate_at_launch = true | ||
| } | ||
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| tag { | ||
| key = "purpose" | ||
| value = "${var.tag_purpose}" | ||
| propagate_at_launch = true | ||
| } | ||
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| lifecycle { | ||
| create_before_destroy = true | ||
| } | ||
| } | ||
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| resource "aws_launch_configuration" "bastion" { | ||
| name_prefix = "${var.cluster_name}_bastion-" | ||
| image_id = "${lookup(var.ami_bastion, var.region)}" | ||
| instance_type = "${var.instance_type_bastion}" | ||
| key_name = "${var.aws_key_name}" | ||
| associate_public_ip_address = true | ||
| iam_instance_profile = "${aws_iam_instance_profile.bastion_profile.name}" | ||
| security_groups = ["${aws_security_group.allow_bastion_ingress.id}", "${aws_security_group.bastion.id}"] | ||
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| user_data = "${template_file.launch_bastion.rendered}\n${var.user_data}" | ||
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| lifecycle { | ||
| create_before_destroy = true | ||
| } | ||
| } | ||
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| resource "template_file" "launch_bastion" { | ||
| vars { | ||
| region = "${var.region}" | ||
| enis_map = "${join(" ",template_file.enis_map.*.rendered)}" | ||
| } | ||
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| template = "${file("${path.module}/bastion_user_data.tpl")}" | ||
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| lifecycle { | ||
| create_before_destroy = true | ||
| } | ||
| } | ||
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| resource "template_file" "enis_map" { | ||
| # count = "${length(aws_network_interface.bastion.*.id)}" | ||
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| count = "${var.azs_count}" | ||
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| vars { | ||
| zone = "${replace(element(split(" ", element(aws_network_interface.bastion.*.description,count.index)),3),"${var.region}","")}" | ||
| eni = "${element(aws_network_interface.bastion.*.id,count.index)}" | ||
| } | ||
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| template = "[\"${zone}\"]=\"${eni}\"" | ||
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| lifecycle { | ||
| create_before_destroy = true | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,32 +1,11 @@ | ||
| #!/bin/bash -v | ||
| ZONE=$(wget -qO - http://169.254.169.254/latest/meta-data/placement/availability-zone) | ||
| INSTANCE_ID=$$(wget http://169.254.169.254/latest/meta-data/instance-id -O - -q) | ||
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| EC2_URL=https://ec2.${region}.amazonaws.com | ||
| declare -A enis_map | ||
| enis_map=(${enis_map}) | ||
| eni=$${enis_map[$${ZONE: -1}]} | ||
| /usr/bin/aws ec2 attach-network-interface --network-interface-id $${eni} --instance-id $${INSTANCE_ID} --device-index 1 --region '${region}' | ||
| /bin/sleep 60 | ||
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| # set fqdn pointing to instance ip | ||
| if [[ -n "${route53_zone_id}" && -n "${fqdn}" ]]; then | ||
| MYMAC=$(wget http://169.254.169.254/latest/meta-data/network/interfaces/macs/ -O - -q) | ||
| MYIP=$(wget http://169.254.169.254/latest/meta-data/network/interfaces/macs/$MYMAC/ipv4-associations -O - -q) | ||
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| cat << EOF > /tmp/route53-change.json | ||
| { | ||
| "Comment": "Updating Bastion Host Record", | ||
| "Changes": [ | ||
| { | ||
| "Action": "UPSERT", | ||
| "ResourceRecordSet": { | ||
| "Name": "bastion-${fqdn}", | ||
| "Type": "A", | ||
| "TTL": 60, | ||
| "ResourceRecords": [ | ||
| { | ||
| "Value": "$MYIP" | ||
| } | ||
| ] | ||
| } | ||
| } | ||
| ] | ||
| } | ||
| EOF | ||
| aws route53 change-resource-record-sets --hosted-zone-id "${route53_zone_id}" --change-batch file:///tmp/route53-change.json | ||
| rm -rf /tmp/route53-change.json | ||
| fi | ||
| ec2ifscan |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,36 @@ | ||
| resource "aws_route53_record" "bastion" { | ||
| #count = "${length(aws_network_interface.bastion.*.private_ips)}" | ||
| count = "${var.azs_count}" | ||
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| name = "bastion-${var.cluster_name}" | ||
| zone_id = "${var.route_zone_id}" | ||
| type = "A" | ||
| set_identifier = "${count.index}" | ||
| weight = "${count.index}" | ||
| records = ["${element(aws_eip.bastion.*.public_ip,count.index)}"] | ||
| ttl = 60 | ||
| health_check_id = "${element(aws_route53_health_check.bastion_check.*.id,count.index)}" | ||
| } | ||
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| resource "aws_route53_health_check" "bastion_check" { | ||
| count = "${var.azs_count}" | ||
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| #count = "${length(aws_route53_record.bastion.*.)}" | ||
| ip_address = "${element(aws_eip.bastion.*.public_ip,count.index)}" | ||
| port = 22 | ||
| type = "TCP" | ||
| failure_threshold = "2" | ||
| request_interval = "10" | ||
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| tags { | ||
| Name = "${var.cluster_name}_bastion-check" | ||
| cluster = "${var.cluster_name}" | ||
| product = "${var.tag_product}" | ||
| purpose = "${var.tag_purpose}" | ||
| builder = "terraform" | ||
| } | ||
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| lifecycle { | ||
| create_before_destroy = true | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,58 @@ | ||
| resource "aws_iam_role" "bastion_role" { | ||
| name = "${var.cluster_name}_bastion_role" | ||
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| assume_role_policy = <<EOF | ||
| { | ||
| "Version": "2012-10-17", | ||
| "Statement": [ | ||
| { | ||
| "Action": "sts:AssumeRole", | ||
| "Principal": { | ||
| "Service": "ec2.amazonaws.com" | ||
| }, | ||
| "Effect": "Allow", | ||
| "Sid": "" | ||
| } | ||
| ] | ||
| } | ||
| EOF | ||
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| lifecycle { | ||
| create_before_destroy = true | ||
| } | ||
| } | ||
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| resource "aws_iam_instance_profile" "bastion_profile" { | ||
| name = "${var.cluster_name}_bastion_profile" | ||
| roles = ["${aws_iam_role.bastion_role.name}"] | ||
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| lifecycle { | ||
| create_before_destroy = true | ||
| } | ||
| } | ||
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| resource "aws_iam_role_policy" "bastion_policy" { | ||
| name = "${var.cluster_name}_bastion_policy" | ||
| role = "${aws_iam_role.bastion_role.id}" | ||
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| policy = <<EOF | ||
| { | ||
| "Version": "2012-10-17", | ||
| "Statement": { | ||
| "Effect": "Allow", | ||
| "Action": [ | ||
| "ec2:AttachNetworkInterface", | ||
| "ec2:DescribeNetworkInterfaces", | ||
| "ec2:DetachNetworkInterface" | ||
| ], | ||
| "Resource": [ | ||
| "*" | ||
| ] | ||
| } | ||
| } | ||
| EOF | ||
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| lifecycle { | ||
| create_before_destroy = true | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,23 @@ | ||
| # NAT | ||
| resource "aws_eip" "gw_ip" { | ||
| count = "${var.azs_count}" | ||
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| # count = "${length(aws_subnet.public.*.id)}" | ||
| vpc = true | ||
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| lifecycle { | ||
| create_before_destroy = true | ||
| } | ||
| } | ||
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| resource "aws_nat_gateway" "gw" { | ||
| count = "${var.azs_count}" | ||
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| # count = "${length(aws_eip.gw_ip.*.id)}" | ||
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| allocation_id = "${element(aws_eip.gw_ip.*.id, count.index)}" | ||
| subnet_id = "${element(aws_subnet.public.*.id, count.index)}" | ||
| lifecycle { | ||
| create_before_destroy = true | ||
| } | ||
| } |
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