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runner_security_group.tf
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########################################
## Gitlab-runner agent security group ##
########################################
resource "aws_security_group" "runner" {
# checkov:skip=CKV2_AWS_5:False positive. Security group is used in a launch template network interface section.
name_prefix = local.name_sg
vpc_id = var.vpc_id
description = var.runner_networking.security_group_description
tags = merge(
local.tags,
{
"Name" = format("%s", local.name_sg)
},
)
}
resource "aws_vpc_security_group_ingress_rule" "runner" {
for_each = var.runner_ingress_rules
security_group_id = aws_security_group.runner.id
from_port = each.value.from_port
to_port = each.value.to_port
ip_protocol = each.value.protocol
description = each.value.description
prefix_list_id = each.value.prefix_list_id
referenced_security_group_id = each.value.security_group
cidr_ipv4 = each.value.cidr_block
cidr_ipv6 = each.value.ipv6_cidr_block
tags = local.tags
}
resource "aws_vpc_security_group_egress_rule" "runner" {
for_each = var.runner_egress_rules
security_group_id = aws_security_group.runner.id
from_port = each.value.from_port
to_port = each.value.to_port
ip_protocol = each.value.protocol
description = each.value.description
prefix_list_id = each.value.prefix_list_id
referenced_security_group_id = each.value.security_group
cidr_ipv4 = each.value.cidr_block
cidr_ipv6 = each.value.ipv6_cidr_block
tags = local.tags
}
resource "aws_vpc_security_group_egress_rule" "runner_manager_to_docker_autoscaler_egress" {
count = var.runner_worker.type == "docker-autoscaler" ? 1 : 0
security_group_id = aws_security_group.runner.id
ip_protocol = "-1"
description = "Allow ALL Egress traffic between Runner Manager and Docker-autoscaler workers security group"
referenced_security_group_id = aws_security_group.docker_autoscaler[0].id
tags = local.tags
}
resource "aws_vpc_security_group_egress_rule" "runner_manager_to_docker_machine_egress" {
count = var.runner_worker.type == "docker+machine" ? 1 : 0
security_group_id = aws_security_group.runner.id
ip_protocol = "-1"
description = "Allow ALL Egress traffic between Runner Manager and Docker-machine workers security group"
referenced_security_group_id = aws_security_group.docker_machine[0].id
tags = local.tags
}
########################################
## Security group IDs to runner agent ##
########################################
# Allow ICMP traffic from allowed security group IDs to gitlab-runner agent instances
resource "aws_vpc_security_group_ingress_rule" "runner_ping_group" {
# checkov:skip=CKV_AWS_277:False positive. ICMP traffic has no ports.
count = length(var.runner_networking.allow_incoming_ping_security_group_ids) > 0 && var.runner_networking.allow_incoming_ping ? length(var.runner_networking.allow_incoming_ping_security_group_ids) : 0
from_port = -1
to_port = -1
ip_protocol = "icmp"
referenced_security_group_id = element(var.runner_networking.allow_incoming_ping_security_group_ids, count.index)
security_group_id = aws_security_group.runner.id
description = format(
"Allow ICMP traffic from %s to gitlab-runner agent instances in group %s",
element(var.runner_networking.allow_incoming_ping_security_group_ids, count.index),
aws_security_group.runner.name
)
}