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cloudwatch alarm for nodes having <= 25% free storage space #64

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Merged
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Jun 18, 2025
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cloudwatch alarm for nodes having <= 25% free storage space #64

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24 changes: 23 additions & 1 deletion alarms.tf
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Original file line number Diff line number Diff line change
Expand Up @@ -192,7 +192,7 @@ locals {

data_high_oldjvm_pressure = {
alarm_name = "${aws_opensearch_domain.this.domain_name}_data_high_oldgenjvm_pressure"
alarm_description = "high old gen jvm pressure on aos warm nodes"
alarm_description = "high old gen jvm pressure on aos data nodes"

comparison_operator = "GreaterThanOrEqualToThreshold"
evaluation_periods = 3
Expand Down Expand Up @@ -260,6 +260,28 @@ locals {
}
# /jvmpressure

# storage
free_storage_space = {
alarm_name = "${aws_opensearch_domain.this.domain_name}_free_storage_space"
alarm_description = "Free storage space is <= 25% for a node"

comparison_operator = "LessThanOrEqualToThreshold"
evaluation_periods = 1
threshold = 0.25 * (var.ebs_volume_size * 1024)
period = 5 * local.minute
namespace = "AWS/ES"
metric_name = "FreeStorageSpace"
statistic = "Minimum"
treat_missing_data = "notBreaching"

dimensions = {
DomainName = aws_opensearch_domain.this.domain_name
}
alarm_actions = var.alarm_actions
ok_actions = var.ok_actions
insufficient_data_actions = var.insufficient_data_actions
}

# kms
aos_key_error = {
create_metric_alarm = var.encrypt_kms_key_id != null
Expand Down