From 1f86d017ec472b974077667e703115d06afcfa29 Mon Sep 17 00:00:00 2001
From: Evan Johnson <ejohnson@akamai.com>
Date: Mon, 26 Feb 2024 11:57:11 -0500
Subject: [PATCH] add k3s flavor support

---
 templates/flavors/k3s/k3sConfigTemplate.yaml | 18 +++++++
 templates/flavors/k3s/k3sControlPlane.yaml   | 50 ++++++++++++++++++++
 templates/flavors/k3s/kustomization.yaml     | 22 +++++++++
 templates/flavors/k3s/secret.yaml            | 50 ++++++++++++++++++++
 4 files changed, 140 insertions(+)
 create mode 100644 templates/flavors/k3s/k3sConfigTemplate.yaml
 create mode 100644 templates/flavors/k3s/k3sControlPlane.yaml
 create mode 100644 templates/flavors/k3s/kustomization.yaml
 create mode 100644 templates/flavors/k3s/secret.yaml

diff --git a/templates/flavors/k3s/k3sConfigTemplate.yaml b/templates/flavors/k3s/k3sConfigTemplate.yaml
new file mode 100644
index 000000000..b3d77b30a
--- /dev/null
+++ b/templates/flavors/k3s/k3sConfigTemplate.yaml
@@ -0,0 +1,18 @@
+---
+apiVersion: bootstrap.cluster.x-k8s.io/v1beta1
+kind: KThreesConfigTemplate
+metadata:
+  name: ${CLUSTER_NAME}-md-0
+spec:
+  template:
+    spec:
+      agentConfig:
+        nodeName: '{{ ds.meta_data.label }}'
+        kubeletArgs:
+          - "provider-id=linode://{{ ds.meta_data.id }}"
+      preK3sCommands:
+        - |
+          mkdir -p /etc/rancher/k3s/config.yaml.d/
+          echo "node-ip: $(hostname -I | grep -oE 192\.168\.[0-9]+\.[0-9]+)" >> /etc/rancher/k3s/config.yaml.d/capi-config.yaml
+        - sed -i '/swap/d' /etc/fstab
+        - swapoff -a
\ No newline at end of file
diff --git a/templates/flavors/k3s/k3sControlPlane.yaml b/templates/flavors/k3s/k3sControlPlane.yaml
new file mode 100644
index 000000000..5916b65e7
--- /dev/null
+++ b/templates/flavors/k3s/k3sControlPlane.yaml
@@ -0,0 +1,50 @@
+---
+apiVersion: controlplane.cluster.x-k8s.io/v1beta1
+kind: KThreesControlPlane
+metadata:
+  name: ${CLUSTER_NAME}-control-plane
+spec:
+  infrastructureTemplate:
+    apiVersion: infrastructure.cluster.x-k8s.io/v1alpha1
+    kind: LinodeMachineTemplate
+    name: ${CLUSTER_NAME}-control-plane
+  kthreesConfigSpec:
+    files:
+      - content: |
+          flannel-backend: none
+          disable-network-policy: true
+        owner: root:root
+        path: /etc/rancher/k3s/config.yaml.d/capi-config.yaml
+      - contentFrom:
+          secret:
+            key: cilium.yaml
+            name: linode-${CLUSTER_NAME}-crs-0
+        owner: root:root
+        path: /var/lib/rancher/k3s/server/manifests/cilium.yaml
+      - contentFrom:
+          secret:
+            key: linode-ccm.yaml
+            name: linode-${CLUSTER_NAME}-crs-0
+        owner: root:root
+        path: /var/lib/rancher/k3s/server/manifests/linode-ccm.yaml
+      - contentFrom:
+          secret:
+            key:  linode-token-region.yaml
+            name: linode-${CLUSTER_NAME}-crs-0
+        owner: root:root
+        path: /var/lib/rancher/k3s/server/manifests/linode-token-region.yaml
+    serverConfig:
+      disableComponents:
+        - servicelb
+        - traefik
+    agentConfig:
+      nodeName: '{{ ds.meta_data.label }}'
+      kubeletArgs:
+        - "provider-id=linode://{{ ds.meta_data.id }}"
+    preK3sCommands:
+      - |
+        echo "node-ip: $(hostname -I | grep -oE 192\.168\.[0-9]+\.[0-9]+)" >> /etc/rancher/k3s/config.yaml.d/capi-config.yaml
+      - sed -i '/swap/d' /etc/fstab
+      - swapoff -a
+  replicas: ${CONTROL_PLANE_MACHINE_COUNT}
+  version: ${KUBERNETES_VERSION}
\ No newline at end of file
diff --git a/templates/flavors/k3s/kustomization.yaml b/templates/flavors/k3s/kustomization.yaml
new file mode 100644
index 000000000..181a4be61
--- /dev/null
+++ b/templates/flavors/k3s/kustomization.yaml
@@ -0,0 +1,22 @@
+resources:
+  - ../base
+  - k3sControlPlane.yaml
+  - k3sConfigTemplate.yaml
+  - secret.yaml
+patches:
+  - target:
+      group: cluster.x-k8s.io
+      version: v1beta1
+      kind: Cluster
+    patch: |-
+      - op: replace
+        path: /spec/controlPlaneRef/kind
+        value: KThreesControlPlane
+  - target:
+      group: cluster.x-k8s.io
+      version: v1beta1
+      kind: MachineDeployment
+    patch: |-
+      - op: replace
+        path: /spec/template/spec/bootstrap/configRef/kind
+        value: KThreesConfigTemplate
\ No newline at end of file
diff --git a/templates/flavors/k3s/secret.yaml b/templates/flavors/k3s/secret.yaml
new file mode 100644
index 000000000..07522ec53
--- /dev/null
+++ b/templates/flavors/k3s/secret.yaml
@@ -0,0 +1,50 @@
+---
+apiVersion: v1
+kind: Secret
+metadata:
+  name: linode-${CLUSTER_NAME}-crs-0
+stringData:
+  linode-token-region.yaml: |-
+    kind: Secret
+    apiVersion: v1
+    metadata:
+      name: linode-token-region
+      namespace: kube-system
+    stringData:
+      apiToken: ${LINODE_TOKEN}
+      region: ${LINODE_REGION}
+  cilium.yaml: |-
+    apiVersion: helm.cattle.io/v1
+    kind: HelmChart
+    metadata:
+       namespace: kube-system
+       name: cilium
+    spec:
+       targetNamespace: kube-system
+       version: v1.15.0
+       chart: cilium
+       repo: https://helm.cilium.io/
+       bootstrap: true
+       valuesContent: |-
+          hubble:
+            relay:
+              enabled: true
+            ui:
+             enabled: true
+  linode-ccm.yaml: |-
+    apiVersion: helm.cattle.io/v1
+    kind: HelmChart
+    metadata:
+     namespace: kube-system
+     name: ccm-linode
+    spec:
+     targetNamespace: kube-system
+     version: v0.3.24
+     chart: ccm-linode
+     repo: https://linode.github.io/linode-cloud-controller-manager/
+     bootstrap: true
+     valuesContent: |-
+       secretRef:
+         name: "linode-token-region"
+       nodeSelector:
+         node-role.kubernetes.io/control-plane: "true"
\ No newline at end of file