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docker_autoscaler.tf
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docker_autoscaler.tf
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#
# This file is responsible for creating the resources needed to run the docker autoscaler plugin from GitLab. It replaces the
# outdated docker+machine driver. The docker+machine driver is a legacy driver that is no longer maintained by GitLab.
#
resource "aws_security_group" "docker_autoscaler" {
count = var.runner_worker.type == "docker-autoscaler" ? 1 : 0
description = "Docker autoscaler security group"
vpc_id = var.vpc_id
name = "${local.name_sg}-docker-autoscaler"
tags = merge(
local.tags,
{
"Name" = format("%s", local.name_sg)
},
)
}
resource "aws_security_group_rule" "autoscaler_egress" {
count = var.runner_worker.type == "docker-autoscaler" ? 1 : 0
description = "All egress traffic docker autoscaler"
type = "egress"
from_port = 0
to_port = 0
protocol = "-1"
cidr_blocks = ["0.0.0.0/0"]
security_group_id = join("", aws_security_group.docker_autoscaler[*].id)
}
resource "aws_security_group_rule" "autoscaler_ingress" {
count = var.runner_worker.type == "docker-autoscaler" ? 1 : 0
description = "All ingress traffic from runner security group"
type = "ingress"
from_port = 0
to_port = 0
protocol = "-1"
source_security_group_id = aws_security_group.runner.id
security_group_id = join("", aws_security_group.docker_autoscaler[*].id)
}
resource "aws_security_group_rule" "extra_autoscaler_ingress" {
count = var.runner_worker.type == "docker-autoscaler" ? length(var.runner_worker_docker_autoscaler_asg.sg_ingresses) : 0
description = var.runner_worker_docker_autoscaler_asg.sg_ingresses[count.index].description
type = "ingress"
from_port = var.runner_worker_docker_autoscaler_asg.sg_ingresses[count.index].from_port
to_port = var.runner_worker_docker_autoscaler_asg.sg_ingresses[count.index].to_port
protocol = var.runner_worker_docker_autoscaler_asg.sg_ingresses[count.index].protocol
cidr_blocks = var.runner_worker_docker_autoscaler_asg.sg_ingresses[count.index].cidr_blocks
security_group_id = join("", aws_security_group.docker_autoscaler[*].id)
}
####################################
###### Launch template Workers #####
####################################
resource "aws_launch_template" "this" {
count = var.runner_worker.type == "docker-autoscaler" ? 1 : 0
name = "${local.name_runner_agent_instance}-worker-launch-template"
user_data = base64gzip(var.runner_worker_docker_autoscaler_instance.start_script)
image_id = data.aws_ami.docker-autoscaler[0].id
instance_type = var.runner_worker_docker_autoscaler_asg.types[0]
key_name = aws_key_pair.autoscaler[0].key_name
ebs_optimized = var.runner_worker_docker_autoscaler_instance.ebs_optimized
monitoring {
enabled = var.runner_worker_docker_autoscaler_instance.monitoring
}
iam_instance_profile {
name = aws_iam_instance_profile.docker_autoscaler[0].name
}
network_interfaces {
security_groups = [aws_security_group.docker_autoscaler[0].id]
associate_public_ip_address = !var.runner_worker_docker_autoscaler_instance.private_address_only
}
block_device_mappings {
device_name = var.runner_worker_docker_autoscaler_instance.root_device_name
ebs {
volume_size = var.runner_worker_docker_autoscaler_instance.root_size
volume_type = var.runner_worker_docker_autoscaler_instance.volume_type
iops = contains(["gp3", "io1", "io2"], var.runner_worker_docker_autoscaler_instance.volume_type) ? var.runner_worker_docker_autoscaler_instance.volume_iops : null
throughput = var.runner_worker_docker_autoscaler_instance.volume_type == "gp3" ? var.runner_worker_docker_autoscaler_instance.volume_throughput : null
encrypted = true
kms_key_id = local.kms_key_arn
}
}
tag_specifications {
resource_type = "instance"
tags = local.tags
}
tag_specifications {
resource_type = "volume"
tags = local.tags
}
tags = local.tags
metadata_options {
http_tokens = var.runner_worker_docker_autoscaler_instance.http_tokens
http_put_response_hop_limit = var.runner_worker_docker_autoscaler_instance.http_put_response_hop_limit
instance_metadata_tags = "enabled"
}
lifecycle {
create_before_destroy = true
}
}
#########################################
# Autoscaling group with launch template
#########################################
# false positive, tags are created with "dynamic" block
# kics-scan ignore-line
resource "aws_autoscaling_group" "autoscaler" {
count = var.runner_worker.type == "docker-autoscaler" ? 1 : 0
name = "${local.name_runner_agent_instance}-asg"
capacity_rebalance = false
protect_from_scale_in = true
dynamic "launch_template" {
for_each = var.runner_worker_docker_autoscaler_asg.enable_mixed_instances_policy ? [] : [1]
content {
id = aws_launch_template.this[0].id
version = aws_launch_template.this[0].latest_version
}
}
dynamic "mixed_instances_policy" {
for_each = var.runner_worker_docker_autoscaler_asg.enable_mixed_instances_policy ? [1] : []
content {
instances_distribution {
on_demand_base_capacity = var.runner_worker_docker_autoscaler_asg.on_demand_base_capacity
on_demand_percentage_above_base_capacity = var.runner_worker_docker_autoscaler_asg.on_demand_percentage_above_base_capacity
spot_allocation_strategy = var.runner_worker_docker_autoscaler_asg.spot_allocation_strategy
spot_instance_pools = var.runner_worker_docker_autoscaler_asg.spot_instance_pools
}
launch_template {
launch_template_specification {
launch_template_id = aws_launch_template.this[0].id
version = aws_launch_template.this[0].latest_version
}
dynamic "override" {
for_each = var.runner_worker_docker_autoscaler_asg.types
content {
instance_type = override.value
}
}
}
}
}
dynamic "instance_refresh" {
for_each = var.runner_worker_docker_autoscaler_asg.upgrade_strategy == "rolling" ? [1] : []
content {
strategy = "Rolling"
preferences {
min_healthy_percentage = var.runner_worker_docker_autoscaler_asg.instance_refresh_min_healthy_percentage
}
triggers = var.runner_worker_docker_autoscaler_asg.instance_refresh_triggers
}
}
vpc_zone_identifier = var.runner_worker_docker_autoscaler_asg.subnet_ids
max_size = var.runner_worker.max_jobs
min_size = 0
desired_capacity = 0 # managed by the fleeting plugin
health_check_grace_period = var.runner_worker_docker_autoscaler_asg.health_check_grace_period
health_check_type = var.runner_worker_docker_autoscaler_asg.health_check_type
force_delete = true
enabled_metrics = var.runner_worker_docker_autoscaler_asg.enabled_metrics
dynamic "tag" {
for_each = local.tags
content {
key = tag.key
value = tag.value
propagate_at_launch = true
}
}
lifecycle {
# do not change these values as we would immediately scale up/down, which is not wanted
ignore_changes = [
desired_capacity,
min_size,
max_size
]
}
}