added k3s install

ansible/install_k3s_3node.yaml

@@ -0,0 +1,112 @@
+---
+- name: Install k3s on 3-node cluster
+  hosts: vm1,vm2,vm3
+  become: true
+  become_user: root
+  serial: 1  # Ensure tasks are executed one host at a time
+
+  tasks:
+    - name: Check if k3s is already installed
+      ansible.builtin.stat:
+        path: /usr/local/bin/k3s
+      register: k3s_binary
+
+    - name: Check if k3s token file exists
+      ansible.builtin.stat:
+        path: /opt/k3s-token
+      register: k3s_token_file
+      when: inventory_hostname == 'vm1'
+
+    - name: Generate and save k3s token if not present (first node)
+      ansible.builtin.copy:
+        dest: /opt/k3s-token
+        content: "{{ lookup('pipe', 'head -c 16 /dev/urandom | sha256sum | cut -d\" \" -f1') }}"
+        owner: root
+        group: root
+        mode: '0600'
+        force: false
+      register: generated_k3s_token
+      when: inventory_hostname == 'vm1' and not k3s_token_file.stat.exists
+
+    - name: Download k3s install script
+      ansible.builtin.get_url:
+        url: https://get.k3s.io
+        dest: /tmp/k3s_install.sh
+        mode: '0755'
+      when: not k3s_binary.stat.exists
+
+    - name: Ensure .kube directory exists
+      ansible.builtin.file:
+        path: /home/user/.kube
+        state: directory
+        mode: '0755'
+      when: inventory_hostname == 'vm1' and not k3s_binary.stat.exists
+
+    - name: Install k3s on first node
+      ansible.builtin.shell: |
+        set -o pipefail
+        # --write-kubeconfig-mode 644
+        K3S_TOKEN=$(cat /opt/k3s-token) /bin/bash /tmp/k3s_install.sh server --cluster-init --disable traefik --disable servicelb --tls-san 192.168.56.80 --node-name vm1 --node-ip 192.168.56.80 
+        if [ $? -eq 0 ]; then
+          mkdir -p /home/vagrant/.kube && cp /etc/rancher/k3s/k3s.yaml /home/vagrant/.kube/config && chown vagrant:vagrant /home/vagrant/.kube/config
+        fi
+      args:
+        executable: /bin/bash
+        creates: /usr/local/bin/k3s
+      when: inventory_hostname == 'vm1' and not k3s_binary.stat.exists
+
+    - name: Read k3s token from master node (for subsequent nodes)
+      ansible.builtin.command: cat /opt/k3s-token
+      register: k3s_token_content
+      delegate_to: vm1
+      when: inventory_hostname != 'vm1' and not k3s_binary.stat.exists
+      changed_when: false
+
+    - name: Wait for k3s API server to be ready on master node
+      ansible.builtin.wait_for:
+        host: 192.168.56.80
+        port: 6443
+        timeout: 60
+      delegate_to: "{{ inventory_hostname }}"
+      when: inventory_hostname != 'vm1' and not k3s_binary.stat.exists
+
+    - name: Install k3s on subsequent nodes
+      ansible.builtin.shell: |
+        set -o pipefail
+        {% if inventory_hostname == 'vm2' %}
+        NODE_IP="192.168.56.81"
+        {% elif inventory_hostname == 'vm3' %}
+        NODE_IP="192.168.56.82"
+        {% else %}
+        NODE_IP="192.168.56.80"
+        {% endif %}
+        K3S_URL=https://192.168.56.80:6443 \
+        K3S_TOKEN={{ k3s_token_content.stdout }} \
+        INSTALL_K3S_EXEC="server --disable traefik --disable servicelb --node-name={{ inventory_hostname }} --node-ip ${NODE_IP}" \
+        /bin/bash /tmp/k3s_install.sh 2>&1
+        exit_code=$?
+        if [ $exit_code -ne 0 ]; then
+          echo "K3S INSTALL FAILED - Service Status:"
+          systemctl status k3s.service --no-pager -l | head -20
+          echo "Recent logs:"
+          journalctl -u k3s.service --no-pager -l | tail -10
+          exit $exit_code
+        fi
+      args:
+        executable: /bin/bash
+        creates: /usr/local/bin/k3s
+      register: k3s_install_result
+      failed_when: false
+      when: inventory_hostname != 'vm1' and not k3s_binary.stat.exists
+
+    - name: Show k3s failure details
+      ansible.builtin.debug:
+        msg: "{{ k3s_install_result.stdout_lines[-30:] }}"
+      when: inventory_hostname != 'vm1' and not k3s_binary.stat.exists and k3s_install_result.rc != 0
+
+    - name: Fail if k3s installation failed
+      ansible.builtin.fail:
+        msg: "K3S installation failed on {{ inventory_hostname }}"
+      when: inventory_hostname != 'vm1' and not k3s_binary.stat.exists and k3s_install_result.rc != 0
+
+