feat: By default conduct single node install

!35

defaults/main.yml

@@ -16,16 +16,29 @@ nfc_kubernetes_tigera_operator_tag: v1.32.3               # Calico v3.27.0
 nfc_kubernetes_enable_metallb: false
 nfc_kubernetes_enable_servicelb: false
 
+
+
+nfc_role_kubernetes_cluster_domain: cluster.local
+
+nfc_role_kubernetes_etcd_enabled: false
+
 nfc_role_kubernetes_install_olm: false
 
+nfc_role_kubernetes_oidc_enabled: false
+
+nfc_role_kubernetes_pod_subnet: 172.16.248.0/21
+nfc_role_kubernetes_service_subnet: 172.16.244.0/22
+
+nfc_role_kubernetes_prime: true
+nfc_role_kubernetes_master: true
+nfc_role_kubernetes_worker: false
 
 ############################################################################################################
 #
 #                     Old Vars requiring refactoring
 #
 # ############################################################################################################
-# KubernetesPodSubnet: 10.85.0.0/16
+
-# KubernetesServiceSubnet: 10.86.0.0/16
 
 
 Kubernetes_Prime: false                                    # Optional, Boolean. Is the current host the Prime master?
@@ -74,7 +87,7 @@ k3s:
         kind: Policy
         rules:
         - level: Request
-      when: "{{ Kubernetes_Master | default(false) }}"
+      when: "{{ nfc_role_kubernetes_master }}"
 
     - name: 90-kubelet.conf
       path: /etc/sysctl.d
@@ -106,7 +119,7 @@ k3s:
         #       usernames: []
         #       runtimeClasses: []
         #       namespaces: [kube-system]
-      when: "{{ kubernetes_config.cluster.prime.name == inventory_hostname }}"
+      when: "{{ kubernetes_config.cluster.prime.name | default(inventory_hostname) == inventory_hostname }}"
 
 
 #############################################################################################

tasks/k3s/configure.yaml

@@ -28,7 +28,7 @@
 
       - src: kubernetes-manifest-rbac.yaml.j2
         dest: /var/lib/rancher/k3s/server/manifests/rbac-authorization-common.yaml
-        when: "{{ kubernetes_config.cluster.prime.name == inventory_hostname }}"
+        when: "{{ kubernetes_config.cluster.prime.name | default(inventory_hostname) == inventory_hostname }}"
 
       - src: iptables-kubernetes.rules.j2
         dest: "/etc/iptables.rules.d/iptables-kubernetes.rules"

tasks/k3s/install.yaml

@@ -3,14 +3,12 @@
 - name: Check for calico deployment manifest
   ansible.builtin.stat:
     name: /var/lib/rancher/k3s/server/manifests/calico.yaml
-  become: true
   register: file_calico_yaml_metadata
 
 
 - name: Check for calico Operator deployment manifest
   ansible.builtin.stat:
     name: /var/lib/rancher/k3s/ansible/deployment-manifest-calico_operator.yaml
-  become: true
   register: file_calico_operator_yaml_metadata
 
 
@@ -113,7 +111,6 @@
 - name: Check for Network Manager Directory
   ansible.builtin.stat:
     name: /etc/NetworkManager/conf.d
-  become: true
   register: directory_network_manager_metadata
 
 
@@ -133,7 +130,6 @@
     mode: '770'
     owner: root
     group: root
-  become: true
   diff: true
   when: directory_network_manager_metadata.stat.exists
 
@@ -159,7 +155,7 @@
   failed_when: false
   register: k3s_installed
   when: >
-    not Kubernetes_Master | default(false) | bool
+    not Kubernetes_worker | default(false) | bool
 
 
 - name: Check Machine Architecture
@@ -185,7 +181,7 @@
   when: >
     ansible_os_family == 'Debian'
       and
-    {{ item.when | default(true) | bool }}
+    item.when | default(true) | bool
   loop: "{{ download_files }}"
   vars:
     ansible_connection: local
@@ -246,7 +242,7 @@
   ansible.builtin.copy:
     src: "/tmp/k3s.{{ ansible_architecture }}"
     dest: "/usr/local/bin/k3s"
-    mode: '740'
+    mode: '741'
     owner: root
     group: root
   when: hash_sha256_k3s_existing_binary.stat.checksum | default('0') != hash_sha256_k3s_downloaded_binary
@@ -254,8 +250,8 @@
 
 - name: Copy install scripts to Host
   ansible.builtin.copy:
-    src: "{{ item }}"
+    src: "{{ item.path }}"
-    dest: "{{ item }}"
+    dest: "{{ item.path }}"
     mode: '755'
     owner: root
     group: root
@@ -267,7 +263,7 @@
       - path: "/tmp/install_olm.sh"
         when: "{{ nfc_role_kubernetes_install_olm }}"
   when: >
-    {{ item.when | default(true) | bool }}
+    item.when | default(true) | bool
 
 
 - name: Required Initial config files
@@ -305,7 +301,7 @@
         dest: /var/lib/rancher/k3s/server/manifests/calico.yaml
         when: >
           {{
-            kubernetes_config.cluster.prime.name == inventory_hostname
+            kubernetes_config.cluster.prime.name | default(inventory_hostname) == inventory_hostname
               and
             (
               (
@@ -350,7 +346,7 @@
       /tmp/install.sh --cluster-init
   changed_when: false
   when: >
-    kubernetes_config.cluster.prime.name == inventory_hostname
+    kubernetes_config.cluster.prime.name | default(inventory_hostname) == inventory_hostname
       and
     k3s_installed.rc == 1
 
@@ -374,7 +370,7 @@
       and
     'calico_manifest' not in ansible_run_tags
       and
-    kubernetes_config.cluster.prime.name == inventory_hostname
+    kubernetes_config.cluster.prime.name | default(inventory_hostname) == inventory_hostname
 
 
 - name: Install MetalLB Operator
@@ -393,7 +389,7 @@
   when: >-
     nfc_kubernetes_enable_metallb | default(false) | bool
       and
-    kubernetes_config.cluster.prime.name == inventory_hostname
+    kubernetes_config.cluster.prime.name | default(inventory_hostname) == inventory_hostname
 
 
 - name: Wait for kubernetes prime to be ready
@@ -407,7 +403,7 @@
         exit 127;
       fi
     executable: /bin/bash
-  delegate_to: "{{ kubernetes_config.cluster.prime.name }}"
+  delegate_to: "{{ kubernetes_config.cluster.prime.name | default(inventory_hostname) }}"
   run_once: true
   register: kubernetes_ready_check
   retries: 30
@@ -431,7 +427,7 @@
     install_olm.rc == 1
   register: install_olm
   when: >
-    kubernetes_config.cluster.prime.name == inventory_hostname
+    kubernetes_config.cluster.prime.name | default(inventory_hostname) == inventory_hostname
       and
     nfc_role_kubernetes_install_olm | default(false) | bool
 
@@ -459,7 +455,7 @@
   failed_when: false
   register: install_olm
   when: >
-    kubernetes_config.cluster.prime.name == inventory_hostname
+    kubernetes_config.cluster.prime.name | default(inventory_hostname) == inventory_hostname
       and
     'olm_uninstall' in ansible_run_tags
 
@@ -470,7 +466,7 @@
   changed_when: false
   failed_when: false    # New cluster will fail
   when: >
-    kubernetes_config.cluster.prime.name == inventory_hostname
+    kubernetes_config.cluster.prime.name | default(inventory_hostname) == inventory_hostname
       and
     kubernetes_config.cluster.networking.encrypt | default(false) | bool
       and
@@ -488,7 +484,7 @@
 - name: Fetch Join Token
   ansible.builtin.slurp:
     src: /var/lib/rancher/k3s/server/token
-  delegate_to: "{{ kubernetes_config.cluster.prime.name }}"
+  delegate_to: "{{ kubernetes_config.cluster.prime.name | default(inventory_hostname) }}"
   run_once: true
   register: k3s_join_token
   no_log: true # Value is sensitive
@@ -497,7 +493,7 @@
 - name: Create Token fact
   ansible.builtin.set_fact:
     k3s_join_token: "{{ k3s_join_token.content | b64decode | replace('\n', '') }}"
-  delegate_to: "{{ kubernetes_config.cluster.prime.name }}"
+  delegate_to: "{{ kubernetes_config.cluster.prime.name | default(inventory_hostname) }}"
   run_once: true
   no_log: true # Value is sensitive
 
@@ -515,7 +511,7 @@
   when: >
     Kubernetes_Master | default(false) | bool
       and
-    not kubernetes_config.cluster.prime.name == inventory_hostname
+    not kubernetes_config.cluster.prime.name | default(inventory_hostname) == inventory_hostname
       and
     k3s_installed.rc == 1
 
@@ -528,13 +524,15 @@
       INSTALL_K3S_SKIP_DOWNLOAD=true \
       INSTALL_K3S_VERSION="v{{ KubernetesVersion }}{{ KubernetesVersion_k3s_prefix }}" \
       K3S_TOKEN="{{ k3s_join_token }}" \
-      K3S_URL="https://{{ hostvars[kubernetes_config.cluster.prime.name].ansible_host }}:6443" \
+      K3S_URL="https://{{ hostvars[kubernetes_config.cluster.prime.name | default(inventory_hostname)].ansible_host }}:6443" \
       /tmp/install.sh -
     executable: /bin/bash
   changed_when: false
   when: >
     not Kubernetes_Master | default(false) | bool
       and
+    not kubernetes_config.cluster.prime.name | default(inventory_hostname) == inventory_hostname
+      and
     k3s_installed.rc == 1
 
 

tasks/k3s/migrate_to_operator.yaml

@@ -150,10 +150,10 @@
             projectcalico.org/operator-node-migration-
         executable: bash
       become: true
-      delegate_to: "{{ kubernetes_config.cluster.prime.name }}"
+      delegate_to: "{{ kubernetes_config.cluster.prime.name | default(inventory_hostname) }}"
       changed_when: false
       failed_when: false
-      loop: "{{ groups[kubernetes_config.cluster.group_name] }}"
+      loop: "{{ groups[kubernetes_config.cluster.group_name | default('make_me_optional')] | default([]) }}"
 
     # kubectl label node ip-10-229-92-202.eu-west-1.compute.internal projectcalico.org/operator-node-migration-
     # migration started

templates/ConfigMap-manifest-Calico_Service_Endpoint.yaml.j2

@@ -6,6 +6,6 @@ metadata:
   namespace: tigera-operator
 data:
   KUBERNETES_SERVICE_HOST: "
-    {%- set octet = kubernetes_config.cluster.networking.ServiceSubnet | split('.') -%}
+    {%- set octet = kubernetes_config.cluster.networking.ServiceSubnet | default(nfc_role_kubernetes_service_subnet) | split('.') -%}
     {{- octet[0] }}.{{- octet[1] }}.{{- octet[2] }}.1"
   KUBERNETES_SERVICE_PORT: '443'

templates/IPPool-manifest-Calico_Cluster.yaml.j2

@@ -9,7 +9,7 @@ spec:
     - Workload
     - Tunnel
   blockSize: 26
-  cidr: {{ kubernetes_config.cluster.networking.podSubnet }}
+  cidr: {{ kubernetes_config.cluster.networking.podSubnet | default(nfc_role_kubernetes_pod_subnet) }}
   ipipMode: Never
   natOutgoing: true
   nodeSelector: all()

templates/Installation-manifest-Calico_Cluster.yaml.j2

@@ -11,7 +11,7 @@ spec:
     hostPorts: Enabled
     ipPools:
     - blockSize: 26
-      cidr: {{ kubernetes_config.cluster.networking.podSubnet }}
+      cidr: {{ kubernetes_config.cluster.networking.podSubnet | default(nfc_role_kubernetes_pod_subnet) }}
       disableBGPExport: false
       encapsulation: VXLAN
       natOutgoing: Enabled
@@ -41,7 +41,7 @@ spec:
     type: RollingUpdate
   nonPrivileged: Disabled
   serviceCIDRs:
-    - {{ kubernetes_config.cluster.networking.ServiceSubnet }}
+    - {{ kubernetes_config.cluster.networking.ServiceSubnet | default(nfc_role_kubernetes_service_subnet) }}
   typhaDeployment:
     spec:
       template:

templates/calico.yaml.j2

@@ -4810,7 +4810,7 @@ spec:
             # chosen from this range. Changing this value after installation will have
             # no effect. This should fall within `--cluster-cidr`.
             - name: CALICO_IPV4POOL_CIDR
-              value: "{{ KubernetesPodSubnet }}"
+              value: "{{ nfc_role_kubernetes_pod_subnet }}"
             # Disable file logging so `kubectl logs` works.
             - name: CALICO_DISABLE_FILE_LOGGING
               value: "true"

templates/iptables-kubernetes.rules.j2

@@ -31,7 +31,7 @@
 
 {%- endif -%}
 
-{%- for kubernetes_host in groups[kubernetes_config.cluster.group_name] -%}
+{%- for kubernetes_host in groups[kubernetes_config.cluster.group_name | default('me_is_optional')] | default([]) -%}
 
     {%- set kubernetes_host = hostvars[kubernetes_host].ansible_host -%}
 
@@ -63,7 +63,7 @@
 
     {%- for master_host in groups['kubernetes_master'] -%}
 
-      {%- if master_host in groups[kubernetes_config.cluster.group_name] -%}
+      {%- if master_host in groups[kubernetes_config.cluster.group_name | default('me_is_optional')] | default([]) -%}
 
         {%- set master_host = hostvars[master_host].ansible_host -%}
 

templates/k3s-config.yaml.j2

@@ -6,7 +6,12 @@
 # Dont edit this file directly as it will be overwritten.
 #
 
-{%- if inventory_hostname in groups['kubernetes_master'] -%}
+{%- if 
+  inventory_hostname in groups['kubernetes_master']
+    or
+  kubernetes_config.cluster.prime.name | default(inventory_hostname) == inventory_hostname
+-%}
+
   {%
 
   set kube_apiserver_arg = [
@@ -19,7 +24,7 @@
   -%}
     {%
     set servers_config = {
-        "cluster-cidr": KubernetesPodSubnet,
+        "cluster-cidr": nfc_role_kubernetes_pod_subnet,
         "disable": [
           "traefik"
         ],
@@ -27,23 +32,23 @@
         "etcd-snapshot-retention": kubernetes_etcd_snapshot_retention | int,
         "etcd-snapshot-schedule-cron":  kubernetes_etcd_snapshot_cron_schedule | string,
         "flannel-backend": "none",
-        "service-cidr": KubernetesServiceSubnet
+        "service-cidr": nfc_role_kubernetes_service_subnet
       }
     -%}
 
     {%- if 
-          kubernetes_config.cluster.domain_name is defined
+          kubernetes_config.cluster.domain_name | default(nfc_role_kubernetes_cluster_domain) is defined
             and
-          kubernetes_config.cluster.domain_name | default('') != ''
+          kubernetes_config.cluster.domain_name | default(nfc_role_kubernetes_cluster_domain) != ''
     -%}
 
         {%- set servers_config = servers_config | combine({
-          "cluster-domain": kubernetes_config.cluster.domain_name
+          "cluster-domain": kubernetes_config.cluster.domain_name | default(nfc_role_kubernetes_cluster_domain)
         }) -%}
 
     {%- endif -%}
 
-    {%- if kubernetes_config.cluster.oidc.enabled | default(false) | bool -%}
+    {%- if kubernetes_config.cluster.oidc.enabled | default(nfc_role_kubernetes_oidc_enabled) | default(false) | bool -%}
 
       {%- 
         set kube_apiserver_arg = kube_apiserver_arg + [
@@ -129,7 +134,7 @@
 -%}
 
 
-{%- if groups[kubernetes_config.cluster.group_name] | default([]) | list | length > 0 -%}
+{%- if groups[kubernetes_config.cluster.group_name | default('make_me_optional')] | default([]) | list | length > 0 -%}
   
   {%- if k3s_installed.rc == 0 -%}
 
@@ -215,7 +220,11 @@
 {# EoF All Nodes #}
 
 
-{%- if inventory_hostname in groups['kubernetes_master'] -%}
+{%- if 
+  inventory_hostname in groups['kubernetes_master']
+    or
+  kubernetes_config.cluster.prime.name | default(inventory_hostname) == inventory_hostname
+-%}
 
   {%- set servers_config = servers_config | combine( all_nodes_config ) -%}