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oke-rm-1.1.1
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-66
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10 files changed

+384
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‎app-dev/devops-and-containers/oke/oke-rm/infra/local.tf

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@@ -1,3 +1,5 @@
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locals {
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create_bastion = var.create_bastion_subnet && var.create_bastion
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# VCN_NATIVE_CNI internally it is mapped as npn
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cni = var.cni_type == "vcn_native" ? "npn" : var.cni_type
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}

‎app-dev/devops-and-containers/oke/oke-rm/infra/main.tf

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@@ -3,7 +3,7 @@ module "network" {
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source = "./modules/network"
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network_compartment_id = var.network_compartment_id
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region = var.region
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cni_type = var.cni_type
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cni_type = local.cni
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# VCN
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create_vcn = var.create_vcn
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vcn_id = var.vcn_id

‎app-dev/devops-and-containers/oke/oke-rm/infra/schema.yaml

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@@ -1,6 +1,6 @@
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title: OCI Native - Base Infra
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description: Basic infrastructure and network rules to start with a Cloud Native project
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informationalText: Basic infrastructure
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title: OKE RM - Base Network Infrastructure
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description: Basic network infrastructure to start with OKE
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informationalText: Basic network infrastructure
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schemaVersion: 1.1.0
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version: "20190304"
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locale: "en"
@@ -88,7 +88,7 @@ variables:
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description: "CNI to use for the OKE cluster"
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type: enum
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enum:
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- npn
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- vcn_native
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- flannel
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required: true
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@@ -210,7 +210,7 @@ variables:
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visible:
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eq:
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- ${cni_type}
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- npn
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- vcn_native
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pod_subnet_cidr:
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title: "Pod subnet CIDR"
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- ${create_pod_subnet}
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- eq:
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- ${cni_type}
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- npn
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- vcn_native
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pod_subnet_dns_label:
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title: "Pod subnet DNS label"
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- ${create_pod_subnet}
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- eq:
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- ${cni_type}
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- npn
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- vcn_native
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pod_subnet_name:
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title: "Pod subnet name"
@@ -246,7 +246,7 @@ variables:
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- ${create_pod_subnet}
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- eq:
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- ${cni_type}
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- npn
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- vcn_native
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# SERVICE SUBNET
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‎app-dev/devops-and-containers/oke/oke-rm/infra/variable.tf

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@@ -18,7 +18,7 @@ variable "vcn_id" {
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}
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variable "vcn_name" {
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default = "vcn-spoke-1"
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default = "vcn-oke-1"
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}
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variable "vcn_cidr_blocks" {
@@ -27,7 +27,7 @@ variable "vcn_cidr_blocks" {
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}
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variable "vcn_dns_label" {
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default = "spoke1"
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default = "oke1"
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}
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# CP SUBNET

‎app-dev/devops-and-containers/oke/oke-rm/oke/addons.tf

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# Add on section, you can also manage addons through Terraform
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# To find out add-ons available and configurations, run: oci ce addon-option list --kubernetes-version <OKE_VERSION > addons.json
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# See also https://docs.oracle.com/en-us/iaas/Content/ContEng/Tasks/contengconfiguringclusteraddons-configurationarguments.htm
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locals {
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# SET THIS TO TRUE IF YOU WANT TO OVERRIDE THE COREDNS PLUGIN AND MANAGE IT THROUGH TERRAFORM
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# REQUIRES AT LEAST 1 NODE IN THE CLUSTER. THAT NODE MUST BE FROM THE SYSTEM NODE POOL IF CLUSTER AUTOSCALER IS ENABLED!
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override_coredns = false
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coredns_addon_configs_base = {
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# Distribute replicas on nodes belonging to different ADs, if possible
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topologySpreadConstraints = jsonencode(
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yamldecode(
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<<-YAML
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- maxSkew: "1"
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topologyKey: topology.kubernetes.io/zone
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whenUnsatisfiable: ScheduleAnyway
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labelSelector:
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matchLabels:
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k8s-app: kube-dns
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YAML
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)
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)
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# Try to spread CoreDNS pods across different nodes
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affinity = jsonencode(
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yamldecode(
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<<-YAML
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podAntiAffinity:
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preferredDuringSchedulingIgnoredDuringExecution:
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- podAffinityTerm:
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labelSelector:
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matchLabels:
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k8s-app: "kube-dns"
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topologyKey: "kubernetes.io/hostname"
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weight: 100
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YAML
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)
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)
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# Rolling update configurations for CoreDNS
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rollingUpdate = "{\"maxSurge\": \"50%\", \"maxUnavailable\":\"25%\"}"
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# For large clusters, it's better to increase this value. The default behaviour is to create a new CoreDNS for every new node. Also, resources for single CoreDNS pods should be increased
43+
nodesPerReplica = "1"
44+
# In case you need to customize the coredns ConfigMap in kube-system
45+
customizeCoreDNSConfigMap = "false"
46+
}
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48+
# COREDNS MUST be scheduled to the system node pool in case cluster autoscaler is enabled
49+
coredns_addon_configs = merge(local.coredns_addon_configs_base, local.enable_cluster_autoscaler ? {
50+
nodeSelectors = "{\"role\": \"system\"}"
51+
} : null)
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53+
metrics_server_addon_configs_base = {
54+
# At least 3 replicas for high availability
55+
numOfReplicas = "3"
56+
# Spread the replicas across ADs if possible
57+
topologySpreadConstraints = jsonencode(
58+
yamldecode(
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<<-YAML
60+
- maxSkew: "1"
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topologyKey: topology.kubernetes.io/zone
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whenUnsatisfiable: ScheduleAnyway
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labelSelector:
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matchLabels:
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k8s-app: metrics-server
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YAML
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)
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)
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}
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71+
# METRICS-SERVER MUST be scheduled to the system node pool in case cluster autoscaler is enabled
72+
metrics_server_addon_configs = merge(local.metrics_server_addon_configs_base, local.enable_cluster_autoscaler ? {
73+
nodeSelectors = "{\"role\": \"system\"}"
74+
} : null)
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76+
cluster_autoscaler_addon_configs = {
77+
authType = "workload"
78+
# Enable balancing of similar node groups
79+
balanceSimilarNodeGroups = "true"
80+
# We should never group by fault domain when balancing for similarity, only by AD
81+
balancingIgnoreLabel = "oci.oraclecloud.com/fault-domain"
82+
# Supported from OKE v1.30.10, autoscale based on freeform or defined tags in the node pools
83+
# DEFINE HERE YOUR AUTOSCALER POLICY, DEFAULT IS MIN: 0, MAX: 5
84+
nodeGroupAutoDiscovery = "compartmentId:${var.oke_compartment_id},nodepoolTags:cluster_autoscaler=enabled,min:0,max:5"
85+
# Make sure to schedule the cluster autoscaler in a node that it is NOT autoscaled, in the system node pool
86+
nodeSelectors = "{\"role\": \"system\"}"
87+
}
88+
}
89+
90+
91+
resource "oci_containerengine_addon" "oke_cert_manager" {
92+
addon_name = "CertManager"
93+
cluster_id = module.oke.cluster_id
94+
remove_addon_resources_on_delete = true
95+
depends_on = [module.oke]
96+
count = local.enable_cert_manager ? 1 : 0
97+
}
98+
99+
resource "oci_containerengine_addon" "oke_metrics_server" {
100+
addon_name = "KubernetesMetricsServer"
101+
cluster_id = module.oke.cluster_id
102+
remove_addon_resources_on_delete = true
103+
dynamic "configurations" {
104+
for_each = local.metrics_server_addon_configs
105+
content {
106+
key = configurations.key
107+
value = configurations.value
108+
}
109+
}
110+
depends_on = [module.oke, oci_containerengine_addon.oke_cert_manager]
111+
count = local.enable_metrics_server ? 1 : 0
112+
}
113+
114+
resource "oci_containerengine_addon" "oke_coredns" {
115+
addon_name = "CoreDNS"
116+
cluster_id = module.oke.cluster_id
117+
remove_addon_resources_on_delete = false
118+
override_existing = true
119+
dynamic "configurations" {
120+
for_each = local.coredns_addon_configs
121+
content {
122+
key = configurations.key
123+
value = configurations.value
124+
}
125+
}
126+
depends_on = [module.oke]
127+
count = var.cluster_type == "enhanced" && local.override_coredns ? 1 : 0
128+
}
129+
130+
resource "oci_containerengine_addon" "oke_cluster_autoscaler" {
131+
addon_name = "ClusterAutoscaler"
132+
cluster_id = module.oke.cluster_id
133+
remove_addon_resources_on_delete = true
134+
dynamic "configurations" {
135+
for_each = local.cluster_autoscaler_addon_configs
136+
content {
137+
key = configurations.key
138+
value = configurations.value
139+
}
140+
}
141+
depends_on = [module.oke]
142+
count = local.enable_cluster_autoscaler ? 1 : 0
143+
}

‎app-dev/devops-and-containers/oke/oke-rm/oke/locals.tf

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locals {
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is_cp_subnet_private = data.oci_core_subnet.cp_subnet_data.prohibit_public_ip_on_vnic
3+
is_lb_subnet_private = data.oci_core_subnet.lb_subnet_data.prohibit_public_ip_on_vnic
4+
cni = var.cni_type == "vcn_native" ? "npn" : var.cni_type
5+
is_flannel = var.cni_type == "flannel"
6+
enable_cert_manager = var.cluster_type == "enhanced" && var.enable_cert_manager
7+
enable_metrics_server = var.cluster_type == "enhanced" && var.enable_cert_manager && var.enable_metrics_server
8+
enable_cluster_autoscaler = var.cluster_type == "enhanced" && var.enable_cluster_autoscaler
9+
create_autoscaler_policies = var.cluster_type == "enhanced"&& var.enable_cluster_autoscaler && var.create_autoscaler_policies
10+
}

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