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ansible/playbooks/roles/kubeconfig-manager/tasks/main.yml

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+---
+# role: kubeconfig-manager
+# description: Reusable role for managing kubeconfig files across multiple clusters
+# author: mk-labs
+# version: 1.0.0
+
+- name: Get local user environment
+  delegate_to: localhost
+  ansible.builtin.set_fact:
+    local_home: "{{ lookup('env', 'HOME') }}"
+    local_user: "{{ lookup('env', 'USER') }}"
+
+- name: Debug local environment
+  delegate_to: localhost
+  ansible.builtin.debug:
+    msg: "Local user: {{ local_user }}, Home directory: {{ local_home }}"
+
+- name: Create .kube directory
+  delegate_to: localhost
+  ansible.builtin.file:
+    path: "{{ local_home }}/.kube"
+    state: directory
+    owner: "{{ local_user }}"
+    mode: "0755"
+
+- name: Copy kubeconfig from remote host
+  ansible.builtin.fetch:
+    src: "{{ kubeconfig_source_path | default('/etc/kubernetes/admin.conf') }}"
+    dest: "{{ local_home }}/.kube/config-{{ cluster_name }}"
+    flat: true
+    mode: "0644"
+
+- name: Include kubeconfig merge tasks
+  ansible.builtin.include_tasks: merge-kubeconfig.yml

ansible/playbooks/roles/kubeconfig-manager/tasks/merge-kubeconfig.yml

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+---
+# Kubeconfig merging tasks
+
+- name: Check if main kubeconfig exists
+  delegate_to: localhost
+  ansible.builtin.stat:
+    path: "{{ local_home }}/.kube/config"
+  register: main_kubeconfig
+
+- name: Create backup of existing kubeconfig
+  delegate_to: localhost
+  ansible.builtin.copy:
+    src: "{{ local_home }}/.kube/config"
+    dest: "{{ local_home }}/.kube/config.backup.{{ ansible_date_time.epoch }}"
+    mode: "0644"
+  when: main_kubeconfig.stat.exists
+
+- name: Read new cluster kubeconfig
+  delegate_to: localhost
+  ansible.builtin.slurp:
+    src: "{{ local_home }}/.kube/config-{{ cluster_name }}"
+  register: new_kubeconfig_content
+
+- name: Parse new kubeconfig
+  delegate_to: localhost
+  ansible.builtin.set_fact:
+    new_kubeconfig: "{{ new_kubeconfig_content.content | b64decode | from_yaml }}"
+
+- name: Update cluster name in kubeconfig
+  delegate_to: localhost
+  ansible.builtin.set_fact:
+    updated_kubeconfig:
+      apiVersion: "{{ new_kubeconfig.apiVersion }}"
+      kind: "{{ new_kubeconfig.kind }}"
+      clusters:
+        - name: "{{ cluster_name }}"
+          cluster: "{{ new_kubeconfig.clusters[0].cluster }}"
+      contexts:
+        - name: "{{ cluster_name }}-admin"
+          context:
+            cluster: "{{ cluster_name }}"
+            user: "{{ cluster_name }}-admin"
+      users:
+        - name: "{{ cluster_name }}-admin"
+          user: "{{ new_kubeconfig.users[0].user }}"
+      current-context: "{{ cluster_name }}-admin"
+
+- name: Merge with existing kubeconfig or create new one
+  delegate_to: localhost
+  block:
+    - name: Read existing kubeconfig
+      ansible.builtin.slurp:
+        src: "{{ local_home }}/.kube/config"
+      register: existing_kubeconfig_content
+      when: main_kubeconfig.stat.exists
+
+    - name: Parse existing kubeconfig
+      ansible.builtin.set_fact:
+        existing_kubeconfig: "{{ existing_kubeconfig_content.content | b64decode | from_yaml }}"
+      when: main_kubeconfig.stat.exists
+
+    - name: Merge kubeconfigs
+      ansible.builtin.set_fact:
+        merged_kubeconfig:
+          apiVersion: "{{ existing_kubeconfig.apiVersion | default('v1') }}"
+          kind: "{{ existing_kubeconfig.kind | default('Config') }}"
+          clusters: "{{ (existing_kubeconfig.clusters | default([])) + updated_kubeconfig.clusters }}"
+          contexts: "{{ (existing_kubeconfig.contexts | default([])) + updated_kubeconfig.contexts }}"
+          users: "{{ (existing_kubeconfig.users | default([])) + updated_kubeconfig.users }}"
+          current-context: "{{ updated_kubeconfig['current-context'] }}"
+      when: main_kubeconfig.stat.exists
+
+    - name: Use new kubeconfig as merged config
+      ansible.builtin.set_fact:
+        merged_kubeconfig: "{{ updated_kubeconfig }}"
+      when: not main_kubeconfig.stat.exists
+
+- name: Write merged kubeconfig
+  delegate_to: localhost
+  ansible.builtin.copy:
+    content: "{{ merged_kubeconfig | to_nice_yaml }}"
+    dest: "{{ local_home }}/.kube/config"
+    mode: "0644"
+    owner: "{{ local_user }}"
+
+- name: Display available contexts
+  delegate_to: localhost
+  ansible.builtin.debug:
+    msg: |
+      Kubeconfig updated successfully!
+      
+      Available contexts:
+      {% for context in merged_kubeconfig.contexts %}
+      - {{ context.name }}
+      {% endfor %}
+      
+      Current context: {{ merged_kubeconfig['current-context'] }}
+      
+      To switch contexts, use:
+      kubectl config use-context <context-name>
+      
+      To list all contexts:
+      kubectl config get-contexts