defaults/main.yml

@@ -5,4 +5,4 @@ kubernetes_server: false
 # value for kuberntes_network: flannel, calico, weave-net
 #kubernetes_network: weave-net
 kubernetes_kubeproxy_mode: ipvs
-kubernetes_version: 1.19.4
+kubernetes_version: 1.20.1

tasks/cluster_k3s.yml

@@ -13,7 +13,7 @@
 
 - name: retreive k3s binary for x86_64
   get_url:
-    url: "https://github.com/rancher/k3s/releases/download/v1.19.5%2Bk3s2/k3s"
+    url: "https://github.com/rancher/k3s/releases/download/v1.20.2%2Bk3s1/k3s"
     dest: "/usr/local/bin/k3s"
     group: root
     owner: root
@@ -24,7 +24,7 @@
 
 - name: retreive k3s binary for arm64
   get_url:
-    url: "https://github.com/rancher/k3s/releases/download/v1.19.5%2Bk3s2/k3s-arm64"
+    url: "https://github.com/rancher/k3s/releases/download/v1.20.2%2Bk3s1/k3s-arm64"
     dest: "/usr/local/bin/k3s"
     group: root
     owner: root
@@ -35,7 +35,7 @@
 
 - name: retreive k3s binary for armv6/armv7
   get_url:
-    url: "https://github.com/rancher/k3s/releases/download/v1.19.5%2Bk3s2/k3s-armhf"
+    url: "https://github.com/rancher/k3s/releases/download/v1.20.2%2Bk3s1/k3s-armhf"
     dest: "/usr/local/bin/k3s"
     group: root
     owner: root

tasks/cluster_kubeadm.yml

@@ -30,7 +30,7 @@
   when:
     - kubernetes_kubeproxy_mode == "ipvs"
 
-- name: Load IPVS kernel module
+- name: Load IPVS kernel module for EL7
   modprobe:
     name: "{{ item }}"
     state: present
@@ -43,6 +43,23 @@
     - nf_conntrack_ipv6
   when:
     - kubernetes_kubeproxy_mode == "ipvs"
+    - ansible_os_family == "RedHat"
+    - ansible_distribution_major_version == '7'
+
+- name: Load IPVS kernel module for EL8
+  modprobe:
+    name: "{{ item }}"
+    state: present
+  with_items:
+    - ip_vs
+    - ip_vs_rr
+    - ip_vs_wrr
+    - ip_vs_sh
+    - nf_conntrack
+  when:
+    - kubernetes_kubeproxy_mode == "ipvs"
+    - ansible_os_family == "RedHat"
+    - ansible_distribution_major_version == '8'
 
 - name: Create thin volumes for kubernetes
   lvol:
@@ -182,16 +199,12 @@
   when:
     - groups['KubernetesMasterConfigured'] is not defined
     - groups['KubernetesMasters'][0] == ansible_hostname
-    - kubeadm_version_major.stdout | int == 1
-    - kubeadm_version_minor.stdout | int >= 15
 
 - name: Init Kubernetes on {{ groups['KubernetesMasters'][0] }}
   command: kubeadm init --config=/root/kubeadm-config.yaml
   when:
     - groups['KubernetesMasterConfigured'] is not defined
     - groups['KubernetesMasters'][0] == ansible_hostname
-    - kubeadm_version_major.stdout | int == 1
-    - kubeadm_version_minor.stdout | int >= 15
 
 - name: Add {{ ansible_hostname }} to KubernetesMasterConfigured group
   group_by:
@@ -208,6 +221,8 @@
   register: server_enrolled
   changed_when: False
   ignore_errors: yes
+  when:
+    - groups['KubernetesMasterConfigured'] is not defined
 
 #- name: Deploy kubeadm config
 #  template:
@@ -218,8 +233,6 @@
 #    mode: 600
 #  when:
 #    - not groups['KubernetesMasters'][0] == ansible_hostname
-#    - kubeadm_version_major.stdout | int == 1
-#    - kubeadm_version_minor.stdout | int >= 15
 #    - server_enrolled.rc == 1
 
 - name: Retreive certificats key on {{ lb_kubemaster }}
@@ -227,16 +240,16 @@
   register: kubernetes_certificateKey
   delegate_to: "{{ lb_kubemaster }}"
   when:
+    - groups['KubernetesMasterConfigured'] is not defined
     - server_enrolled.rc == 1
     - kubernetes_master|bool
-    - kubeadm_version_major.stdout | int == 1
-    - kubeadm_version_minor.stdout | int >= 15
 
 - name: Retreive token on "{{ lb_kubemaster }}"
   command: kubeadm token create
   register: kubetoken
   delegate_to: "{{ lb_kubemaster }}"
   when:
+    - groups['KubernetesMasterConfigured'] is not defined
     - server_enrolled.rc == 1
 
 - name: Retreive hash certificat
@@ -249,6 +262,7 @@
   register: cacerthash
   delegate_to: "{{ lb_kubemaster }}"
   when:
+    - groups['KubernetesMasterConfigured'] is not defined
     - server_enrolled.rc == 1
 
 - name: Deploy kubeadm config
@@ -259,11 +273,11 @@
     group: root
     mode: 0600
   when:
+    - groups['KubernetesMasterConfigured'] is not defined
     - server_enrolled.rc == 1
 
 - name: Join '{{ ansible_hostname }}' to Kubernetes cluster
   command: kubeadm join --config=/root/kubeadm-config.yaml
   when:
-    - kubeadm_version_major.stdout | int == 1
+    - groups['KubernetesMasterConfigured'] is not defined
-    - kubeadm_version_minor.stdout | int >= 15
     - server_enrolled.rc == 1

tasks/install_server.yml

@@ -100,12 +100,15 @@
 #    - kubernetes_master|bigip_pool
 
 - name: Check if a node is still tainted
-  command: kubectl get nodes '{{ ansible_hostname | lower }}' -o jsonpath='{.spec.taints}'
+  command: kubectl --kubeconfig=/etc/kubernetes/admin.conf get nodes '{{ ansible_hostname | lower }}' -o jsonpath='{.spec.taints}'
-  when: kubernetes_master_taint
   register: current_taint
+  when:
+    - kubernetes_master_taint|bool
 
 - name: taint the machine if needed
 #  command: kubectl --kubeconfig=/etc/kubernetes/admin.conf taint nodes --all node-role.kubernetes.io/master-
   command: kubectl taint nodes '{{ ansible_hostname | lower }}' node-role.kubernetes.io/master-
-  when: kubernetes_master_taint|bool and current_taint.stdout
+  when:
+    - kubernetes_master_taint|bool
+    - current_taint.stdout
 

templates/etc/modules-load.d/ipvs.conf.j2

@@ -2,5 +2,9 @@ ip_vs
 ip_vs_rr
 ip_vs_wrr
 ip_vs_sh
+{% if ansible_os_family == "RedHat" and ansible_distribution_major_version == '8' %}
+nf_conntrack
+{% elif ansible_os_family == "RedHat" and ansible_distribution_major_version == '7' %}
 nf_conntrack_ipv4
 nf_conntrack_ipv6
+{% endif %}

templates/etc/sysconfig/kubelet.j2

@@ -1,2 +1,2 @@
 #https://kubernetes.io/docs/reference/command-line-tools-reference/feature-gates/#feature-gates
-KUBELET_EXTRA_ARGS="--container-runtime=remote --container-runtime-endpoint={% if kubernetes_cri == "containerd" %}unix:///run/containerd/containerd.sock{% elif kubernetes_cri == "cri-o" %}unix:///var/run/crio/crio.sock{% endif %} --node-ip={{ ansible_eth0.ipv4.address }}"
+KUBELET_EXTRA_ARGS="--container-runtime=remote --container-runtime-endpoint={% if kubernetes_cri == "containerd" %}unix:///run/containerd/containerd.sock{% elif kubernetes_cri == "cri-o" %}unix:///var/run/crio/crio.sock{% endif %} --node-ip={{ ansible_default_ipv4.address }}"

templates/etc/systemd/system/kubelet.service.d/0-kubelet-extra-args.conf.j2

@@ -1,2 +1,2 @@
 [Service]
-Environment=KUBELET_EXTRA_ARGS="--container-runtime=remote --container-runtime-endpoint={% if kubernetes_cri == "containerd" %}unix:///run/containerd/containerd.sock{% elif kubernetes_cri == "cri-o" %}unix:///var/run/crio/crio.sock{% endif %} --node-ip={{ ansible_eth0.ipv4.address }}"
+Environment=KUBELET_EXTRA_ARGS="--container-runtime=remote --container-runtime-endpoint={% if kubernetes_cri == "containerd" %}unix:///run/containerd/containerd.sock{% elif kubernetes_cri == "cri-o" %}unix:///var/run/crio/crio.sock{% endif %} --node-ip={{ ansible_default_ipv4.address }}"

templates/kubeadm-config.yaml.j2

@@ -72,7 +72,7 @@ nodeRegistration:
   ignorePreflightErrors:
   - SystemVerification
 ---
-apiVersion: kubeadm.k8s.io/v1beta1
+apiVersion: kubeadm.k8s.io/v1beta2
 kind: ClusterConfiguration
 kubernetesVersion: stable
 {% if lbip_kubeapiserver is defined %}