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* Init * Update README.md * Use label module * Address PR comments * Address PR comments
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# tf-memcache | ||
# tf_memcached |
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# Define composite variables for resources | ||
module "label" { | ||
source = "git::https://github.com/cloudposse/tf_label.git?ref=tags/0.1.0" | ||
namespace = "${var.namespace}" | ||
name = "${var.name}" | ||
stage = "${var.stage}" | ||
} | ||
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resource "null_resource" "host" { | ||
count = "${var.cluster_size}" | ||
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triggers = { | ||
name = "${replace(aws_elasticache_cluster.default.cluster_address, ".cfg.", format(".%04d.", count.index + 1))}:11211" | ||
} | ||
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lifecycle { | ||
create_before_destroy = true | ||
} | ||
} | ||
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# | ||
# Security Group Resources | ||
# | ||
resource "aws_security_group" "default" { | ||
vpc_id = "${var.vpc_id}" | ||
name = "${module.label.id}" | ||
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ingress { | ||
from_port = "11211" # Memcache | ||
to_port = "11211" | ||
protocol = "tcp" | ||
security_groups = ["${var.security_groups}"] | ||
} | ||
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egress { | ||
from_port = 0 | ||
to_port = 0 | ||
protocol = "-1" | ||
cidr_blocks = ["0.0.0.0/0"] | ||
} | ||
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tags { | ||
Name = "${module.label.id}" | ||
Namespace = "${var.namespace}" | ||
Stage = "${var.stage}" | ||
} | ||
} | ||
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resource "aws_elasticache_subnet_group" "default" { | ||
name = "${module.label.id}" | ||
subnet_ids = ["${var.subnets}"] | ||
} | ||
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resource "aws_elasticache_parameter_group" "default" { | ||
name = "${module.label.id}" | ||
family = "memcached1.4" | ||
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parameter { | ||
name = "max_item_size" | ||
value = "${var.max_item_size}" | ||
} | ||
} | ||
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# | ||
# ElastiCache Resources | ||
# | ||
resource "aws_elasticache_cluster" "default" { | ||
cluster_id = "${module.label.id}" | ||
engine = "memcached" | ||
engine_version = "${var.engine_version}" | ||
node_type = "${var.instance_type}" | ||
num_cache_nodes = "${var.cluster_size}" | ||
parameter_group_name = "${aws_elasticache_parameter_group.default.name}" | ||
subnet_group_name = "${aws_elasticache_subnet_group.default.name}" | ||
security_group_ids = ["${aws_security_group.default.id}"] | ||
maintenance_window = "${var.maintenance_window}" | ||
notification_topic_arn = "${var.notification_topic_arn}" | ||
port = "11211" | ||
az_mode = "${var.cluster_size == 1 ? "single-az" : "cross-az" }" | ||
availability_zones = ["${slice(var.availability_zones, 0, var.cluster_size)}"] | ||
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tags { | ||
Name = "${module.label.id}" | ||
Namespace = "${var.namespace}" | ||
Stage = "${var.stage}" | ||
} | ||
} | ||
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# | ||
# CloudWatch Resources | ||
# | ||
resource "aws_cloudwatch_metric_alarm" "cache_cpu" { | ||
alarm_name = "${module.label.id}-cpu-utilization" | ||
alarm_description = "Memcached cluster CPU utilization" | ||
comparison_operator = "GreaterThanThreshold" | ||
evaluation_periods = "1" | ||
metric_name = "CPUUtilization" | ||
namespace = "AWS/ElastiCache" | ||
period = "300" | ||
statistic = "Average" | ||
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threshold = "${var.alarm_cpu_threshold_percent}" | ||
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dimensions { | ||
CacheClusterId = "${module.label.id}" | ||
} | ||
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alarm_actions = ["${var.alarm_actions}"] | ||
depends_on = ["aws_elasticache_cluster.default"] | ||
} | ||
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resource "aws_cloudwatch_metric_alarm" "cache_memory" { | ||
alarm_name = "${module.label.id}-freeable-memory" | ||
alarm_description = "Memcached cluster freeable memory" | ||
comparison_operator = "LessThanThreshold" | ||
evaluation_periods = "1" | ||
metric_name = "FreeableMemory" | ||
namespace = "AWS/ElastiCache" | ||
period = "60" | ||
statistic = "Average" | ||
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threshold = "${var.alarm_memory_threshold_bytes}" | ||
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dimensions { | ||
CacheClusterId = "${module.label.id}" | ||
} | ||
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alarm_actions = ["${var.alarm_actions}"] | ||
depends_on = ["aws_elasticache_cluster.default"] | ||
} | ||
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module "dns" { | ||
source = "git::https://github.com/cloudposse/tf_hostname.git?ref=tags/0.1.0" | ||
namespace = "${var.namespace}" | ||
name = "${var.name}" | ||
stage = "${var.stage}" | ||
ttl = 60 | ||
zone_id = "${var.zone_id}" | ||
records = ["${aws_elasticache_cluster.default.cluster_address}"] | ||
} | ||
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module "dns_config" { | ||
source = "git::https://github.com/cloudposse/tf_hostname.git?ref=tags/0.1.0" | ||
namespace = "${var.namespace}" | ||
name = "config.${var.name}" | ||
stage = "${var.stage}" | ||
ttl = 60 | ||
zone_id = "${var.zone_id}" | ||
records = ["${aws_elasticache_cluster.default.configuration_endpoint}"] | ||
} |
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output "id" { | ||
value = "${aws_elasticache_cluster.default.id}" | ||
} | ||
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output "security_group_id" { | ||
value = "${aws_security_group.default.id}" | ||
} | ||
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output "port" { | ||
value = "11211" | ||
} | ||
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output "config_host" { | ||
value = "${module.dns_config.hostname}" | ||
} | ||
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output "hosts" { | ||
value = "${join(",", null_resource.host.*.triggers.name)}" | ||
} |
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variable "namespace" { | ||
default = "global" | ||
} | ||
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variable "stage" { | ||
default = "default" | ||
} | ||
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variable "name" { | ||
default = "memcache" | ||
} | ||
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variable "security_groups" { | ||
type = "list" | ||
} | ||
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variable "vpc_id" { | ||
default = "" | ||
} | ||
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variable "max_item_size" { | ||
default = "10485760" | ||
} | ||
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variable "subnets" { | ||
type = "list" | ||
default = [] | ||
} | ||
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variable "maintenance_window" { | ||
default = "wed:03:00-wed:04:00" | ||
} | ||
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variable "cluster_size" { | ||
default = "1" | ||
} | ||
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variable "instance_type" { | ||
default = "cache.t2.micro" | ||
} | ||
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variable "engine_version" { | ||
default = "1.4.33" | ||
} | ||
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variable "notification_topic_arn" { | ||
default = "" | ||
} | ||
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variable "alarm_cpu_threshold_percent" { | ||
default = "75" | ||
} | ||
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variable "alarm_memory_threshold_bytes" { | ||
# 10MB | ||
default = "10000000" | ||
} | ||
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variable "alarm_actions" { | ||
type = "list" | ||
default = [] | ||
} | ||
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variable "apply_immediately" { | ||
default = "true" | ||
} | ||
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variable "availability_zones" { | ||
type = "list" | ||
} | ||
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variable "zone_id" {} |