initial commit

ansible/playbooks/01-common.yml

@@ -0,0 +1,40 @@
+---
+- name: Common OS prerequisites for all k8s nodes
+  hosts: k8s
+  become: true
+
+  tasks:
+    - name: Disable swap now
+      command: swapoff -a
+      when: ansible_facts['swaptotal_mb'] > 0
+
+    - name: Remove swap from /etc/fstab
+      replace:
+        path: /etc/fstab
+        regexp: '^([^#].*\s+swap\s+.*)$'
+        replace: '# \1'
+
+    - name: Load kernel modules at boot
+      copy:
+        dest: /etc/modules-load.d/k8s.conf
+        content: |
+          overlay
+          br_netfilter
+
+    - name: Load kernel modules now
+      modprobe:
+        name: "{{ item }}"
+      loop:
+        - overlay
+        - br_netfilter
+
+    - name: Set sysctl for k8s networking
+      copy:
+        dest: /etc/sysctl.d/k8s.conf
+        content: |
+          net.bridge.bridge-nf-call-iptables  = 1
+          net.bridge.bridge-nf-call-ip6tables = 1
+          net.ipv4.ip_forward                 = 1
+
+    - name: Apply sysctl
+      command: sysctl --system