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Azure Kubernetes Serviceの推奨メトリックアラートを設定するTerraform HCLのサンプル
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terraform { | |
required_version = ">= 0.13.4" | |
} | |
provider "azurerm" { | |
version = "~>2.30" | |
features {} | |
} | |
resource "azurerm_resource_group" "sample" { | |
name = var.aks_rg_name | |
location = var.aks_rg_location | |
} | |
data "azurerm_log_analytics_workspace" "sample" { | |
name = var.la_workspace_name | |
resource_group_name = var.la_workspace_rg_name | |
} | |
resource "azurerm_kubernetes_cluster" "sample" { | |
name = var.aks_cluster_name | |
kubernetes_version = "1.18.8" | |
location = azurerm_resource_group.sample.location | |
resource_group_name = azurerm_resource_group.sample.name | |
dns_prefix = var.aks_cluster_name | |
default_node_pool { | |
name = "default" | |
type = "VirtualMachineScaleSets" | |
availability_zones = [1, 2, 3] | |
node_count = 3 | |
vm_size = "Standard_F2s_v2" | |
} | |
identity { | |
type = "SystemAssigned" | |
} | |
addon_profile { | |
oms_agent { | |
enabled = true | |
log_analytics_workspace_id = data.azurerm_log_analytics_workspace.sample.id | |
} | |
kube_dashboard { | |
enabled = false | |
} | |
} | |
} | |
resource "azurerm_role_assignment" "aks_metrics" { | |
scope = azurerm_kubernetes_cluster.sample.id | |
role_definition_name = "Monitoring Metrics Publisher" | |
principal_id = azurerm_kubernetes_cluster.sample.addon_profile.0.oms_agent.0.oms_agent_identity.0.object_id | |
} | |
resource "azurerm_monitor_diagnostic_setting" "aks" { | |
name = "aks-diag" | |
target_resource_id = azurerm_kubernetes_cluster.sample.id | |
log_analytics_workspace_id = data.azurerm_log_analytics_workspace.sample.id | |
log { | |
category = "kube-apiserver" | |
enabled = true | |
retention_policy { | |
days = 0 | |
enabled = false | |
} | |
} | |
log { | |
category = "kube-controller-manager" | |
enabled = true | |
retention_policy { | |
days = 0 | |
enabled = false | |
} | |
} | |
log { | |
category = "kube-scheduler" | |
enabled = true | |
retention_policy { | |
days = 0 | |
enabled = false | |
} | |
} | |
log { | |
category = "kube-audit" | |
enabled = false | |
retention_policy { | |
days = 0 | |
enabled = false | |
} | |
} | |
log { | |
category = "kube-audit-admin" | |
enabled = true | |
retention_policy { | |
days = 0 | |
enabled = false | |
} | |
} | |
log { | |
category = "guard" | |
enabled = true | |
retention_policy { | |
days = 0 | |
enabled = false | |
} | |
} | |
log { | |
category = "cluster-autoscaler" | |
enabled = true | |
retention_policy { | |
days = 0 | |
enabled = false | |
} | |
} | |
metric { | |
category = "AllMetrics" | |
enabled = false | |
retention_policy { | |
days = 0 | |
enabled = false | |
} | |
} | |
} | |
provider "kubernetes" { | |
version = "~>1.13" | |
load_config_file = false | |
host = azurerm_kubernetes_cluster.sample.kube_config.0.host | |
client_certificate = base64decode(azurerm_kubernetes_cluster.sample.kube_config.0.client_certificate) | |
client_key = base64decode(azurerm_kubernetes_cluster.sample.kube_config.0.client_key) | |
cluster_ca_certificate = base64decode(azurerm_kubernetes_cluster.sample.kube_config.0.cluster_ca_certificate) | |
} | |
resource "kubernetes_cluster_role" "log_reader" { | |
metadata { | |
name = "containerhealth-log-reader" | |
} | |
rule { | |
api_groups = ["", "metrics.k8s.io", "extensions", "apps"] | |
resources = ["pods/log", "events", "nodes", "pods", "deployments", "replicasets"] | |
verbs = ["get", "list"] | |
} | |
} | |
resource "kubernetes_cluster_role_binding" "log_reader" { | |
metadata { | |
name = "containerhealth-read-logs-global" | |
} | |
role_ref { | |
kind = "ClusterRole" | |
name = "containerhealth-log-reader" | |
api_group = "rbac.authorization.k8s.io" | |
} | |
subject { | |
kind = "User" | |
name = "clusterUser" | |
api_group = "rbac.authorization.k8s.io" | |
} | |
} | |
resource "kubernetes_config_map" "oms_agent" { | |
depends_on = [azurerm_role_assignment.aks_metrics] | |
metadata { | |
name = "container-azm-ms-agentconfig" | |
namespace = "kube-system" | |
} | |
data = { | |
schema-version = "v1" | |
config-version = "ver1" | |
alertable-metrics-configuration-settings = <<EOT | |
[alertable_metrics_configuration_settings.container_resource_utilization_thresholds] | |
container_memory_working_set_threshold_percentage = 80.0 | |
EOT | |
} | |
// Waiting for omsagent restart & custom metrics preparation | |
provisioner "local-exec" { | |
command = "sleep 180" | |
} | |
} | |
data "azurerm_monitor_action_group" "sample" { | |
resource_group_name = var.alert_actiongroup_rg_name | |
name = var.alert_actiongroup_name | |
} | |
resource "azurerm_monitor_metric_alert" "aks_oom_killed_container_count" { | |
depends_on = [kubernetes_config_map.oms_agent] | |
name = "oomKilledContainerCount" | |
resource_group_name = azurerm_resource_group.sample.name | |
scopes = [azurerm_kubernetes_cluster.sample.id] | |
severity = 3 | |
frequency = "PT1M" | |
window_size = "PT5M" | |
criteria { | |
metric_namespace = "Insights.Container/pods" | |
metric_name = "oomKilledContainerCount" | |
aggregation = "Average" | |
operator = "GreaterThan" | |
threshold = 0 | |
dimension { | |
name = "kubernetes namespace" | |
operator = "Include" | |
values = ["*"] | |
} | |
dimension { | |
name = "controllerName" | |
operator = "Include" | |
values = ["*"] | |
} | |
} | |
action { | |
action_group_id = data.azurerm_monitor_action_group.sample.id | |
} | |
} | |
resource "azurerm_monitor_metric_alert" "aks_memory_ws_exceeds_percentage" { | |
depends_on = [kubernetes_config_map.oms_agent] | |
name = "memoryWorkingSetExceededPercentage" | |
resource_group_name = azurerm_resource_group.sample.name | |
scopes = [azurerm_kubernetes_cluster.sample.id] | |
severity = 3 | |
frequency = "PT1M" | |
window_size = "PT5M" | |
criteria { | |
metric_namespace = "Insights.Container/containers" | |
metric_name = "memoryWorkingSetExceededPercentage" | |
aggregation = "Average" | |
operator = "GreaterThan" | |
threshold = 95 | |
dimension { | |
name = "kubernetes namespace" | |
operator = "Include" | |
values = ["*"] | |
} | |
dimension { | |
name = "controllerName" | |
operator = "Include" | |
values = ["*"] | |
} | |
} | |
action { | |
action_group_id = data.azurerm_monitor_action_group.sample.id | |
} | |
} |
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variable "aks_rg_name" { | |
type = string | |
default = "your-aks-resource-group-name" | |
} | |
variable "aks_rg_location" { | |
type = string | |
default = "your-aks-resource-group-location" | |
} | |
variable "aks_cluster_name" { | |
type = string | |
default = "your-aks-cluster-name" | |
} | |
variable "la_workspace_name" { | |
type = string | |
default = "your-log-analytics-workspace-name" | |
} | |
variable "la_workspace_rg_name" { | |
type = string | |
default = "your-log-analytics-workspace-resource-group-name" | |
} | |
variable "alert_actiongroup_name" { | |
type = string | |
default = "your-alert-actiongroup-name" | |
} | |
variable "alert_actiongroup_rg_name" { | |
type = string | |
default = "your-alert-actiongroup-resource-grouop-name" | |
} |
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