feat: implement calico cni - too many problems with flannel (#94)

Signed-off-by: Devin Buhl <devin.kray@gmail.com>

README.md

@@ -20,7 +20,7 @@ The following components will be installed in your [k3s](https://k3s.io/) cluste
 Feel free to read up on any of these technologies before you get started to be more familiar with them.
 
 - [cert-manager](https://cert-manager.io/) - SSL certificates - with Cloudflare DNS challenge
-- [flannel](https://github.com/flannel-io/flannel) - default CNI provided by k3s
+- [calico](https://www.tigera.io/project-calico/) - CNI (container network interface)
 - [flux](https://toolkit.fluxcd.io/) - GitOps tool for deploying manifests from the `cluster` directory
 - [hajimari](https://github.com/toboshii/hajimari) - start page with ingress discovery
 - [kube-vip](https://kube-vip.io/) - layer 2 load balancer for the Kubernetes control plane

provision/ansible/inventory/group_vars/kubernetes/k3s.yml

@@ -25,8 +25,14 @@ k3s_use_unsupported_config: false
 # (string) Control Plane registration address
 k3s_registration_address: "{{ kubevip_address }}"
 
+# (list) A list of URLs to deploy on the primary control plane. Read notes below.
+k3s_server_manifests_urls:
+  - url: https://docs.projectcalico.org/archive/v3.20/manifests/tigera-operator.yaml
+    filename: tigera-operator.yaml
+
 # (list) A flat list of templates to deploy on the primary control plane
 # /var/lib/rancher/k3s/server/manifests
 k3s_server_manifests_templates:
+  - "calico-installation.yaml.j2"
   - "kube-vip-rbac.yaml.j2"
   - "kube-vip-daemonset.yaml.j2"

provision/ansible/inventory/group_vars/master/k3s.yml

@@ -12,8 +12,9 @@ k3s_server:
     # kube-vip
     - "{{ kubevip_address }}"
   docker: false
-  flannel-backend: "host-gw" # This needs to be in quotes
+  flannel-backend: "none" # This needs to be in quotes
   disable:
+    - flannel
     - traefik
     - servicelb
     - metrics-server

provision/ansible/playbooks/templates/calico-installation.yaml.j2

@@ -0,0 +1,16 @@
+---
+apiVersion: operator.tigera.io/v1
+kind: Installation
+metadata:
+  name: default
+spec:
+  calicoNetwork:
+    # Note: The ipPools section cannot be modified post-install.
+    ipPools:
+      - blockSize: 26
+        cidr: "{{ k3s_server['cluster-cidr'] }}"
+        encapsulation: "VXLANCrossSubnet"
+        natOutgoing: Enabled
+        nodeSelector: all()
+  nodeMetricsPort: 9091
+  typhaMetricsPort: 9093