feat: IPv6 support 🚀 (#855)

Co-authored-by: Devin Buhl <onedr0p@users.noreply.github.com>

bootstrap/templates/ansible/inventory/group_vars/master/main.yaml.j2

@@ -1,10 +1,15 @@
+#jinja2: trim_blocks: True, lstrip_blocks: True
 ---
 # https://rancher.com/docs/k3s/latest/en/installation/install-options/server-config/
 # https://github.com/PyratLabs/ansible-role-k3s
 
 k3s_control_node: true
 k3s_server:
+{% if bootstrap_ipv6_enabled | default(false) %}
+  node-ip: "{% raw %}{{ ansible_host }},{{ ansible_default_ipv6.address }}{% endraw %}"
+{% else %}
   node-ip: "{% raw %}{{ ansible_host }}{% endraw %}"
+{% endif %}
   tls-san:
     - "{% raw %}{{ kube_vip_addr }}{% endraw %}"
   docker: false

bootstrap/templates/ansible/inventory/group_vars/worker/main.yaml.j2

@@ -1,7 +1,12 @@
+#jinja2: trim_blocks: True, lstrip_blocks: True
 ---
 # https://rancher.com/docs/k3s/latest/en/installation/install-options/agent-config/
 # https://github.com/PyratLabs/ansible-role-k3s
 
 k3s_control_node: false
 k3s_agent:
+{% if bootstrap_ipv6_enabled | default(false) %}
+  node-ip: "{% raw %}{{ ansible_host }},{{ ansible_default_ipv6.address }}{% endraw %}"
+{% else %}
   node-ip: "{% raw %}{{ ansible_host }}{% endraw %}"
+{% endif %}

bootstrap/templates/ansible/playbooks/templates/custom-cilium-helmchart.yaml.j2.j2

@@ -1,3 +1,4 @@
+#jinja2: trim_blocks: True, lstrip_blocks: True
 ---
 # https://docs.k3s.io/helm
 apiVersion: helm.cattle.io/v1
@@ -30,17 +31,29 @@ spec:
       enabled: false
     ipam:
       mode: kubernetes
+    {% if bootstrap_ipv6_enabled | default(false) %}
+    ipv4NativeRoutingCIDR: "{% raw %}{{ k3s_server['cluster-cidr'].split(',')[0] }}{% endraw %}"
+    ipv6NativeRoutingCIDR: "{% raw %}{{ k3s_server['cluster-cidr'].split(',')[1] }}{% endraw %}"
+    ipv6:
+      enabled: true
+    {% else %}
     ipv4NativeRoutingCIDR: "{% raw %}{{ k3s_server['cluster-cidr'] }}{% endraw %}"
+    {% endif %}
     k8sServiceHost: "{% raw %}{{ kube_vip_addr }}{% endraw %}"
     k8sServicePort: 6443
     kubeProxyReplacement: strict
     kubeProxyReplacementHealthzBindAddr: 0.0.0.0:10256
+    {% if bootstrap_ipv6_enabled | default(false) %}
+    l2announcements:
+      enabled: false
+    {% else %}
     # https://github.com/cilium/cilium/issues/26586
     l2announcements:
       enabled: true
       leaseDuration: 120s
       leaseRenewDeadline: 60s
       leaseRetryPeriod: 1s
+    {% endif %}
     loadBalancer:
       algorithm: maglev
       mode: dsr

bootstrap/templates/ansible/playbooks/templates/custom-coredns-helmchart.yaml.j2.j2

@@ -19,7 +19,11 @@ spec:
     service:
       name: kube-dns
       # Choose the 10th IP address from the start of the service-cidr
+      {% if bootstrap_ipv6_enabled | default(false) %}
+      clusterIP: "{% raw %}{{ k3s_server['service-cidr'].split(',')[0] | ansible.utils.nthhost(10) }}{% endraw %}"
+      {% else %}
       clusterIP: "{% raw %}{{ k3s_server['service-cidr'] | ansible.utils.nthhost(10) }}{% endraw %}"
+      {% endif %}
     serviceAccount:
       create: true
     deployment: