Tidy-up

home_linux/k3s_stuff/disable_swap.yml

@@ -0,0 +1,17 @@
+---
+- name: Disable swap on Raspberries
+  hosts: all
+  roles: 
+    - common
+  become: yes
+  gather_facts: no
+  
+  tasks:
+  
+  - name: Disable swap
+    ansible.builtin.shell: sudo swapoff -a
+
+  - name: Reboot
+    ansible.builtin.reboot:
+      test_command: uptime
+

home_linux/k3s_stuff/home_inventory.yml

@@ -0,0 +1,26 @@
+all:
+  children:
+    kubernetes:
+      hosts:
+        192.168.0.51:
+        192.168.0.52:
+        192.168.0.53:
+        192.168.0.54:
+    kube_masters:
+      hosts:
+        192.168.0.51:
+    kube_workers:
+      hosts:
+        192.168.0.52:
+        192.168.0.53:
+        192.168.0.54:
+    docker:
+      hosts:
+        192.168.0.50:
+    zero:
+      hosts:
+        192.168.0.49:
+        192.168.0.55:
+        192.168.0.48:
+vars:
+  ansible_ssh_private_key_file = /home/vraducanu/.ssh/id_rsa

home_linux/k3s_stuff/install_k3s.yml

@@ -0,0 +1,162 @@
+---
+- name: Install K3s on Raspberries
+  hosts: kubernetes
+  roles: 
+    - common
+  become: yes
+  gather_facts: yes
+  vars:
+    k3s_global_env:
+      - key: K3S_KUBECONFIG_MODE
+        value: 644
+      - key: INSTALL_K3S_EXEC
+        value: --disable traefik --disable servicelb
+    k3s_worker_env:
+      - key: K3S_URL
+        value: "https://{{ groups.kube_masters[0] }}:6443"
+
+  tasks:
+  
+  # Make sure "cgroup_enable=cpuset cgroup_memory=1 cgroup_enable=memory" is added to the end
+  # of /boot/cmdline.txt before running this playbook
+  - name: Add install parameters for all nodes to /etc/environment
+    ansible.builtin.lineinfile:
+      dest: /etc/environment
+      state: present
+      regexp: "^{{ item.key }}="
+      line: "{{ item.key }}={{ item.value }}"
+    with_items: "{{ k3s_global_env }}"
+    when: ('kube_masters' in group_names)
+
+  - name: Reset SSH connection to make new environment variables available
+    ansible.builtin.meta: reset_connection
+
+  - name: Download K3s install script
+    ansible.builtin.get_url:
+      url: https://get.k3s.io
+      dest: ./install-k3s.sh
+      mode: '0755'
+
+  - name: Install K3s on master node
+    ansible.builtin.command:
+      cmd: ./install-k3s.sh
+    become: no
+    when: ('kube_masters' in group_names)
+
+  - name: Save cluster token to file on master
+    ansible.builtin.shell: sudo cat /var/lib/rancher/k3s/server/node-token > token
+    when: ('kube_masters' in group_names)
+    register: token
+
+  - name: Copy token to local controller
+    ansible.builtin.fetch:
+      dest: buffer/
+      src: ./token
+      flat: yes
+    when: ('kube_masters' in group_names)
+    run_once: yes
+
+  - name: Copy token file to workers
+    ansible.builtin.copy:
+      src: buffer/token
+      dest: ./token
+    when: ('kube_workers' in group_names)
+  
+  - name: Load token as host variable on workers
+    ansible.builtin.command:
+      cmd: cat token
+    register: token
+    when: ('kube_workers' in group_names)
+
+  - name: Add token to worker node's /etc/environment
+    ansible.builtin.lineinfile:
+      dest: "/etc/environment"
+      state: present
+      line: "K3S_TOKEN={{ token.stdout }}"
+    when: ('kube_workers' in group_names)
+
+  - name: Add install parameters for worker node to /etc/environment
+    ansible.builtin.lineinfile:
+      dest: "/etc/environment"
+      state: present
+      regexp: "^{{ item.key }}="
+      line: "{{ item.key }}={{ item.value }}"
+    with_items: "{{ k3s_worker_env }}"
+    when: ('kube_workers' in group_names)
+
+  - name: Reset SSH connection to make new environment variables available
+    ansible.builtin.meta: reset_connection
+
+  - name: Install K3s on worker nodes
+    ansible.builtin.command:
+      cmd: ./install-k3s.sh
+    become: no
+    when: ('kube_workers' in group_names)
+
+  - name: Cleanup install files
+    ansible.builtin.command:
+      cmd: rm install-k3s.sh token
+
+  - name: Fix permissions for config file on master node
+    ansible.builtin.file:
+      path: /etc/rancher/k3s/k3s.yaml
+      owner: "{{ ansible_user }}"
+      group: "{{ ansible_user }}"
+    when: ('kube_masters' in group_names)
+  
+  - name: Generate config file in ~/.kube/config
+    ansible.builtin.shell: cat /etc/rancher/k3s/k3s.yaml > ~/.kube/config
+    become: no
+    when: ('kube_masters' in group_names)
+
+  - name: Fix permissions for config file on master node
+    ansible.builtin.file:
+      path: ~/.kube/config
+      mode: '0600'
+    become: no
+    when: ('kube_masters' in group_names)
+
+  - name: Replace localhost references in config file
+    ansible.builtin.replace:
+      path: ~/.kube/config
+      regexp: '(127\.0\.0\.1)'
+      replace: "{{ ansible_host }}"
+    become: no
+    when: ('kube_masters' in group_names)
+
+  - name: Get K3s service status
+    ansible.builtin.command:
+      cmd: sudo systemctl status k3s
+    register: status
+    when: ('kube_masters' in group_names)
+
+  - name: Print K3s service status
+    ansible.builtin.debug:
+      var: status.stdout_lines
+    when: ('kube_masters' in group_names)
+
+  - name: Pause for 10 seconds to allow cluster setup to complete
+    ansible.builtin.pause:
+      seconds: 10
+
+  - name: Get K3s cluster nodes
+    ansible.builtin.command:
+      cmd: kubectl get nodes
+    register: status
+    when: ('kube_masters' in group_names)
+  
+  - name: Print K3s cluster nodes
+    ansible.builtin.debug:
+      var: status.stdout_lines
+    when: ('kube_masters' in group_names)
+
+  - name: Get K3s cluster status
+    ansible.builtin.command:
+      cmd: kubectl get all -A -o wide
+    register: status
+    when: ('kube_masters' in group_names)
+  
+  - name: Print K3s cluster status
+    ansible.builtin.debug:
+      var: status.stdout_lines
+    when: ('kube_masters' in group_names)

home_linux/k3s_stuff/remove_k3s.yml

@@ -0,0 +1,26 @@
+---
+- name: Remove K3s from Raspberries
+  hosts: kubernetes
+  roles: 
+    - common
+  become: yes
+  gather_facts: no
+  
+  tasks:
+
+  - name: Remove K3s from master nodes
+    ansible.builtin.command:
+      cmd: sudo sh /usr/local/bin/k3s-uninstall.sh
+    when: ('kube_masters' in group_names)
+
+  - name: Remove K3s from worker nodes
+    ansible.builtin.command:
+      cmd: sudo sh /usr/local/bin/k3s-agent-uninstall.sh
+    when: ('kube_workers' in group_names)
+
+  - name: Unset installation environment variables
+    ansible.builtin.lineinfile:
+      path: /etc/environment
+      state: absent
+      regexp: 'K3S'
+

home_linux/k3s_stuff/roles/common/vars/main.yml

@@ -0,0 +1,10 @@
+$ANSIBLE_VAULT;1.1;AES256
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+6230623361393438610a383230376431373034306331376536313831633366373665393866373338
+65313334623131323931353436623265623033396266623364313934383865386532623630336164
+32653432613065303363303730353864353739633530376637333662303134613339353062303932
+33646466383561373264333734626364663763393766666664653365386230393562626563376265
+63303939363932636266303566363062643166343064343762313339353839326361383062653036
+6232

home_linux/k3s_stuff/set_hosts_file_for_k3s.yml

@@ -0,0 +1,14 @@
+---
+- name: Update hosts files on k3s nodes
+  hosts: kubernetes
+  roles: 
+    - common
+  become: yes
+  gather_facts: no
+  
+  tasks:
+  
+  - name: Replace the local A records for local services in k3s
+    ansible.builtin.lineinfile:
+      path: /etc/hosts
+      line: 192.168.0.56 services.ze.internet.local