Merge branch 'role_kubernetes-k3s'

kubernetes/defaults/main.yml

@@ -2,16 +2,40 @@
 kubernetes:
   ipPool:
     ipv4:
+      # Minimum: /24
       cluster_cidr: 10.42.0.0/16
       service_cidr: 10.43.0.0/16
     ipv6:
+      # Minimum: /120
       cluster_cidr: fd42::/56
       service_cidr: fd43::/112
 
-    # Replace - with _
+    # Interface to grab node-IPv4/v6 from
     nodeIp_interface: <interface to grab nodeIp from>
 
   control_plane:
     dns_name: <control-plane dns-reachable-name>
 
   token: <shared token for nodes to join>
+
+  network:
+    # One of [flannel, calico]
+    plugin: calico
+
+    # Helper for networking
+    helper:
+      # https://github.com/Ruakij/RoutingTableToWg
+      #  Translates received-routes from e.g. BGP to wireguard-allowedips
+      #  Helpful, when nodeIp_interface is a wireguard-interface
+      routingtabletowg: false
+
+  # One of [traefik-ingress]
+  ingress_controller: traefik-ingress
+
+  config_extra:
+    # etcd-tuning
+    #  heartbeat: 0.5-1.5x of rtt
+    #  election:  10x- of heartbeat
+    etcd-arg:
+      heartbeat-interval: 500
+      election-timeout: 5000

kubernetes/meta/main.yml

@@ -1,4 +1,3 @@
 ---
   dependencies:
     - role: docker
-    - role: netmaker

kubernetes/tasks/install.yml

@@ -8,6 +8,7 @@
   ansible.builtin.template:
     src: k3s/{{ type }}/config.yaml.jinja2
     dest: /etc/rancher/k3s/config.yaml
+  register: config
 
 - name: Download install-script
   get_url:

kubernetes/tasks/install/agent/install_k3s.yml

@@ -5,3 +5,9 @@
   until: "command is not failed"
   retries: 2
   delay: 10
+
+- name: Restart when config changed, but install already done
+  service:
+    name: k3s
+    status: restarted
+  when: "inventory_hostname != groups['kubernetes'][0] and not command.changed and config.changed"

kubernetes/tasks/install/server/install_k3s.yml

@@ -4,6 +4,12 @@
   register: command
   changed_when: "'No change detected' in command.stdout"
 
+- name: Restart when config changed, but install already done
+  service:
+    name: k3s
+    status: restarted
+  when: "inventory_hostname == groups['kubernetes'][0] and not command.changed and config.changed"
+
 - name: Waiting for K3s-server to accept connections
   ansible.builtin.wait_for:
     host: "{{ inventory_hostname }}"
@@ -20,6 +26,12 @@
   retries: 2
   delay: 10
 
+- name: Restart when config changed, but install already done
+  service:
+    name: k3s
+    status: restarted
+  when: "inventory_hostname != groups['kubernetes'][0] and not command.changed and config.changed"
+
 - name: Waiting for K3s-server to accept connections on other nodes
   ansible.builtin.wait_for:
     host: "{{ inventory_hostname }}"
@@ -34,3 +46,10 @@
 #    block: |
 #      export KUBECONFIG="/etc/rancher/k3s/k3s.yaml"
 #    create: true
+
+- name: Deploy calico
+  import_tasks: ./roles/kubernetes/tasks/install/server/network-plugin/deploy_calico.yml
+  when: "kubernetes.network.plugin == 'calico'"
+
+- name: Deploy network-helpers
+  import_tasks: ./roles/kubernetes/tasks/install/server/network-plugin/deploy_network_helper.yml

kubernetes/tasks/install/server/network-plugin/deploy_calico.yml

@@ -0,0 +1,17 @@
+- name: Deploy calico operator
+  command: kubectl create -f https://raw.githubusercontent.com/projectcalico/calico/v3.25.0/manifests/tigera-operator.yaml
+  register: command
+  changed_when: "'created' in command.stdout"
+  run_once: true
+
+- name: Deploy calico ressource template
+  ansible.builtin.template:
+    src: ./k3s/server/network-plugin/calico/custom-ressource.yml.jinja2
+    dest: /root/calico-ressource.yml
+  run_once: true
+
+- name: Deploy calico ressource
+  command: kubectl apply -f /root/calico-ressource.yml
+  register: command
+  changed_when: "'created' in command.stdout"
+  run_once: true

kubernetes/tasks/install/server/network-plugin/deploy_network_helper.yml

@@ -0,0 +1,7 @@
+- name: Deploy service-file for routing-table to wireguard-translation
+  ansible.builtin.template:
+    src: ./k3s/server/network-plugin/calico/routingtabletowg.yml.jinja2
+    dest: /var/lib/rancher/k3s/server/manifests/routingtabletowg.yml
+    mode: u=rw,g=r,o=r
+  run_once: true
+  when: "kubernetes.network.helper.routingtabletowg"

kubernetes/tasks/prerequisites.yml

@@ -17,19 +17,26 @@
 #- name: Disable swap
 #  command: swapoff -a
 
-#- name: Install iptables
-#  package:
-#      name:
-#          #- containerd
-#          - iptables
-#      state: latest
+- name: Install required packages
+  package:
+      name:
+          #- containerd
+          #- iptables
+          # For Longhorn:
+          - nfs-common
+          - open-iscsi
+      state: latest
 
 -  import_tasks: ./prerequisites/containerd.yml
 
+- name: Gather interface-name
+  set_fact:
+    interface: "{{ kubernetes.ipPool.nodeIp_interface | replace('-', '_') }}"
+
 - name: Getting nodeIp-data from interface
   set_fact:
-    nodeip_ipv4: "{{ ansible_facts[ kubernetes.ipPool.nodeIp_interface ].ipv4.address }}"
-    nodeip_ipv6: "{{ ansible_facts[ kubernetes.ipPool.nodeIp_interface ].ipv6[0].address }}"
+    nodeip_ipv4: "{{ ansible_facts[ interface ].ipv4.address }}"
+    nodeip_ipv6: "{{ ansible_facts[ interface ].ipv6[0].address if ansible_facts[ interface ].ipv6 is defined }}"
 
 - name: Run handlers to reload configurations
   meta: flush_handlers

kubernetes/templates/k3s/agent/config.yaml.jinja2

@@ -1,7 +1,21 @@
 server: https://{{ kubernetes.control_plane.dns_name }}:6443
-token: {{ kubernetes.token }}
+token: '{{ kubernetes.token }}'
 
+{% if nodeip_ipv6 != "" and kubernetes.ipPool.ipv6 is defined %}
 node-ip: {{ nodeip_ipv4 }},{{ nodeip_ipv6 }} 
 
 # FIXME: Workaround for bug in Kubernetes 1.24/1.25 ignoring node IPv6 addresses
 kubelet-arg: "--node-ip=0.0.0.0"
+{% else %}
+node-ip: {{ nodeip_ipv4 }}
+{% endif %}
+
+## Label
+# Region & DC
+node-label:
+{% if region is defined %}
+  - topology.kubernetes.io/region={{ region }}
+{% endif %}
+{% if zone is defined %}
+  - topology.kubernetes.io/zone={{ zone }}
+{% endif %}

kubernetes/templates/k3s/server/config.yaml.jinja2

@@ -1,23 +1,52 @@
 ## Base ##
 {% if inventory_hostname == groups['kubernetes'][0] %}
+# Initialize with internal etcd
 cluster-init: true
 {% else %}
-server: https://{{ groups['kubernetes'][0] }}:6443
+server: https://{{ hostvars[groups['kubernetes'][0]]['nodeip_ipv4'] }}:6443
 {% endif %}
 
-token: {{ kubernetes.token }}
+token: '{{ kubernetes.token }}'
 tls-san:
   - {{ kubernetes.control_plane.dns_name }}
 
 # Networking
+{% if nodeip_ipv6 != "" and kubernetes.ipPool.ipv6 is defined %}
 node-ip: {{ nodeip_ipv4 }},{{ nodeip_ipv6 }}
 cluster-cidr: {{ kubernetes.ipPool.ipv4.cluster_cidr }},{{ kubernetes.ipPool.ipv6.cluster_cidr }}
 service-cidr: {{ kubernetes.ipPool.ipv4.service_cidr }},{{ kubernetes.ipPool.ipv6.service_cidr }}  
 
+# FIXME: Workaround for bug in Kubernetes 1.24/1.25 ignoring node IPv6 addresses
+kubelet-arg: "--node-ip=0.0.0.0"
+{% else %}
+node-ip: {{ nodeip_ipv4 }}
+cluster-cidr: {{ kubernetes.ipPool.ipv4.cluster_cidr }}
+service-cidr: {{ kubernetes.ipPool.ipv4.service_cidr }}
+{% endif %}
+
 egress-selector-mode: disabled
 
 # Network-plugin
+{% if kubernetes.network_plugin == "flannel" %}
 flannel-backend: vxlan
+{% else %}
+disable-network-policy: true
+flannel-backend: none
+{% endif %}
 
-# FIXME: Workaround for bug in Kubernetes 1.24/1.25 ignoring node IPv6 addresses
-kubelet-arg: "--node-ip=0.0.0.0"
+# Ingress-plugin
+{% if kubernetes.ingress_controller != "traefik-ingress" %}
+disable: traefik
+{% endif %}
+
+## Label
+# Region & DC
+node-label:
+{% if region is defined %}
+  - topology.kubernetes.io/region={{ region }}
+{% endif %}
+{% if zone is defined %}
+  - topology.kubernetes.io/zone={{ zone }}
+{% endif %}
+
+{{ kubernetes.config_extra | to_yaml }}

kubernetes/templates/k3s/server/network-plugin/calico/custom-ressource.yml.jinja2

@@ -0,0 +1,34 @@
+# This section includes base Calico installation configuration.
+# For more information, see: https://projectcalico.docs.tigera.io/master/reference/installation/api#operator.tigera.io/v1.Installation
+apiVersion: operator.tigera.io/v1
+kind: Installation
+metadata:
+  name: default
+spec:
+  # Configures Calico networking.
+  calicoNetwork:
+    # Note: The ipPools section cannot be modified post-install.
+    ipPools:
+    - blockSize: 26
+      cidr: {{ kubernetes.ipPool.ipv4.cluster_cidr }}
+      encapsulation: None
+      natOutgoing: Enabled
+      nodeSelector: all()
+
+{% if nodeip_ipv6 != "" and kubernetes.ipPool.ipv6 is defined %}
+    - blockSize: 122
+      cidr: {{ kubernetes.ipPool.ipv6.cluster_cidr }}
+      encapsulation: None
+      natOutgoing: Enabled
+      nodeSelector: all()
+{% endif %}
+
+---
+
+# This section configures the Calico API server.
+# For more information, see: https://projectcalico.docs.tigera.io/master/reference/installation/api#operator.tigera.io/v1.APIServer
+apiVersion: operator.tigera.io/v1
+kind: APIServer 
+metadata: 
+  name: default 
+spec: {}

kubernetes/templates/k3s/server/network-plugin/calico/routingtabletowg.yml.jinja2

@@ -0,0 +1,45 @@
+# https://kubernetes.io/docs/concepts/workloads/controllers/daemonset/
+apiVersion: apps/v1
+kind: DaemonSet
+metadata:
+  name: routingtabletowg
+  namespace: calico-system
+  labels:
+    app: routingtabletowg
+spec:
+  selector:
+    matchLabels:
+      app: routingtabletowg
+  template:
+    metadata:
+      labels:
+        app: routingtabletowg
+    spec:
+      tolerations:
+      # this toleration is to have the daemonset runnable on master nodes
+      # remove it if your masters can't run pods
+      - key: node-role.kubernetes.io/master
+        effect: NoSchedule
+      hostNetwork: true
+      containers:
+        - name: routingtabletowg
+          image: "ruakij/routingtabletowg:0.2.0"
+          env:
+            - name: INTERFACE
+              value: {{ kubernetes.ipPool.nodeIp_interface }}
+            - name: FILTER_PROTOCOL
+              value: bird
+            - name: PERIODIC_SYNC
+              value: '300'
+          securityContext:
+            capabilities:
+              add:
+                - NET_ADMIN
+          resources:
+            requests:
+              cpu: 10m
+              memory: 10Mi
+            limits:
+              cpu: 20m
+              memory: 20Mi
+---