update: add installation scripts for Vagrant and Ansible, enhance k3s setup, and improve provisioning process

vagrant/dev/ubuntu/ansible/install_k3s_3node.yaml

@@ -109,4 +109,39 @@
         msg: "K3S installation failed on {{ inventory_hostname }}"
       when: inventory_hostname != 'vm1' and not k3s_binary.stat.exists and k3s_install_result.rc != 0
 
+    - name: Ensure /home/vagrant/.kube directory exists
+      ansible.builtin.file:
+        path: /home/vagrant/.kube
+        state: directory
+        owner: vagrant
+        group: vagrant
+        mode: '0700'
 
+    - name: Copy kubeconfig to vagrant user
+      ansible.builtin.copy:
+        src: /etc/rancher/k3s/k3s.yaml
+        dest: /home/vagrant/.kube/config
+        owner: vagrant
+        group: vagrant
+        mode: '0600'
+        remote_src: true
+
+    - name: Ensure KUBECONFIG is set in vagrant .bashrc
+      ansible.builtin.lineinfile:
+        path: /home/vagrant/.bashrc
+        line: 'export KUBECONFIG=~/.kube/config'
+        state: present
+        insertafter: EOF
+        owner: vagrant
+        group: vagrant
+        mode: '0644'
+
+    - name: Ensure kubectl completion is sourced in vagrant .bashrc
+      ansible.builtin.lineinfile:
+        path: /home/vagrant/.bashrc
+        line: 'source <(kubectl completion bash)'
+        state: present
+        insertafter: EOF
+        owner: vagrant
+        group: vagrant
+        mode: '0644'