Fix bugs, Update for EL8

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
-    - kubeadm_version_minor.stdout | int >= 15
+    - groups['KubernetesMasterConfigured'] is not defined
     - server_enrolled.rc == 1