Doc: add example of using kubectl connection plugin

changelogs/fragments/20240601-doc-example-of-using-kubectl.yaml

@@ -0,0 +1,3 @@
+---
+minor_changes:
+  - connection/kubectl.py - Added an example of using the kubectl connection plugin to the documentation (https://github.com/ansible-collections/kubernetes.core/pull/741).

docs/kubernetes.core.kubectl_connection.rst

@@ -365,6 +365,84 @@ Parameters
 
 
 
+Examples
+--------
+
+.. code-block:: yaml
+
+    - name: Run a command in a pod using local kubectl with kubeconfig file ~/.kube/config
+      hots: localhost
+      gather_facts: no
+      connection: kubernetes.core.kubectl
+      vars:
+        ansible_kubectl_namespace: my-namespace
+        ansible_kubectl_pod: my-pod
+        ansible_kubectl_container: my-container
+      tasks:
+        # be aware that the command is executed as the user that started the container
+        # and requrie python to be installed in the image
+        - name: Run a command in a pod
+          ansible.builtin.command: echo "Hello, World!"
+
+    - name: Run a command in a pod using local kebectl with inventory variables
+      # Example inventory:
+      # k8s:
+      #   hosts:
+      #     foo.example.com:
+      #       ansible_connection: kubernetes.core.kubectl
+      #       ansible_kubectl_kubeconfig: /root/.kube/foo.example.com.config
+      #       ansible_kubectl_pod: my-foo-pod
+      #       ansible_kubectl_container: my-foo-container
+      #       ansible_kubectl_namespace: my-foo-namespace
+      #     bar.example.com:
+      #       ansible_connection: kubernetes.core.kubectl
+      #       ansible_kubectl_kubeconfig: /root/.kube/bar.example.com.config
+      #       ansible_kubectl_pod: my-bar-pod
+      #       ansible_kubectl_container: my-bar-container
+      #       ansible_kubectl_namespace: my-bar-namespace
+      hosts: k8s
+      gather_facts: no
+      tasks:
+        # be aware that the command is executed as the user that started the container
+        # and requrie python to be installed in the image
+        - name: Run a command in a pod
+          ansible.builtin.command: echo "Hello, World!"
+
+    - name: Run a command in a pod using dynamic inventory
+      hosts: localhost
+      gather_facts: no
+      vars:
+        kubeconfig: /root/.kube/config
+        namespace: my-namespace
+        my_app: my-app
+      tasks:
+        - name: Get My App pod info based on label
+          kubernetes.core.k8s_info:
+            kubeconfig: "{{ kubeconfig }}"
+            namespace: "{{ namespace }}"
+            kind: Pod
+            label_selectors: app.kubernetes.io/name = "{{ my_app }}"
+          register: my_app_pod
+
+        # community.general.json_query is required, plesae install it
+        # with `ansible-galaxy collection install community.general`
+        - name: Get My App pod name
+          ansible.builtin.set_fact:
+            my_app_pod_name: "{{ my_app_pod | community.general.json_query('resources[0].metadata.name') }}"
+
+        - name: Add My App pod to inventory
+          ansible.builtin.add_host:
+            name: "{{ my_app_pod_name }}"
+            ansible_connection: kubernetes.core.kubectl
+            ansible_kubectl_kubeconfig: "{{ kubeconfig }}"
+            ansible_kubectl_pod: "{{ my_app_pod_name }}"
+            ansible_kubectl_namespace: "{{ namespace }}"
+
+        - name: Run a command in My App pod
+          # be aware that the command is executed as the user that started the container
+          # and requrie python to be installed in the image
+          ansible.builtin.command: echo "Hello, World!"
+          delegate_to: "{{ my_app_pod_name }}"
 
 
 

plugins/connection/kubectl.py

@@ -181,6 +181,83 @@
         aliases: [ kubectl_verify_ssl ]
 """
 
+EXAMPLES = r"""
+
+- name: Run a command in a pod using local kubectl with kubeconfig file ~/.kube/config
+  hots: localhost
+  gather_facts: no
+  connection: kubernetes.core.kubectl
+  vars:
+    ansible_kubectl_namespace: my-namespace
+    ansible_kubectl_pod: my-pod
+    ansible_kubectl_container: my-container
+  tasks:
+    # be aware that the command is executed as the user that started the container
+    # and requrie python to be installed in the image
+    - name: Run a command in a pod
+      ansible.builtin.command: echo "Hello, World!"
+
+- name: Run a command in a pod using local kebectl with inventory variables
+  # Example inventory:
+  # k8s:
+  #   hosts:
+  #     foo.example.com:
+  #       ansible_connection: kubernetes.core.kubectl
+  #       ansible_kubectl_kubeconfig: /root/.kube/foo.example.com.config
+  #       ansible_kubectl_pod: my-foo-pod
+  #       ansible_kubectl_container: my-foo-container
+  #       ansible_kubectl_namespace: my-foo-namespace
+  #     bar.example.com:
+  #       ansible_connection: kubernetes.core.kubectl
+  #       ansible_kubectl_kubeconfig: /root/.kube/bar.example.com.config
+  #       ansible_kubectl_pod: my-bar-pod
+  #       ansible_kubectl_container: my-bar-container
+  #       ansible_kubectl_namespace: my-bar-namespace
+  hosts: k8s
+  gather_facts: no
+  tasks:
+    # be aware that the command is executed as the user that started the container
+    # and requrie python to be installed in the image
+    - name: Run a command in a pod
+      ansible.builtin.command: echo "Hello, World!"
+
+- name: Run a command in a pod using dynamic inventory
+  hosts: localhost
+  gather_facts: no
+  vars:
+    kubeconfig: /root/.kube/config
+    namespace: my-namespace
+    my_app: my-app
+  tasks:
+    - name: Get My App pod info based on label
+      kubernetes.core.k8s_info:
+        kubeconfig: "{{ kubeconfig }}"
+        namespace: "{{ namespace }}"
+        kind: Pod
+        label_selectors: app.kubernetes.io/name = "{{ my_app }}"
+      register: my_app_pod
+
+    # community.general.json_query is required, plesae install it
+    # with `ansible-galaxy collection install community.general`
+    - name: Get My App pod name
+      ansible.builtin.set_fact:
+        my_app_pod_name: "{{ my_app_pod | community.general.json_query('resources[0].metadata.name') }}"
+
+    - name: Add My App pod to inventory
+      ansible.builtin.add_host:
+        name: "{{ my_app_pod_name }}"
+        ansible_connection: kubernetes.core.kubectl
+        ansible_kubectl_kubeconfig: "{{ kubeconfig }}"
+        ansible_kubectl_pod: "{{ my_app_pod_name }}"
+        ansible_kubectl_namespace: "{{ namespace }}"
+
+    - name: Run a command in My App pod
+      # be aware that the command is executed as the user that started the container
+      # and requrie python to be installed in the image
+      ansible.builtin.command: echo "Hello, World!"
+      delegate_to: "{{ my_app_pod_name }}"
+"""
+
 import json
 import os
 import os.path