Issue #11: Abstract a few things so we can run this playbook on diffe…

…rent sets of servers.

README.md

@@ -9,7 +9,7 @@ This repository is a companion to a YouTube series by Jeff Geerling in 2020:
   - **Episode 3**: [Installing K3s on the Turing Pi](https://www.youtube.com/watch?v=N4bfNefjBSw) ([blog post](https://www.jeffgeerling.com/blog/2020/pi-cluster-episode-3-installing-k3s-kubernetes-on-turing-pi))
   - **Episode 4**: Coming soon!
 
-You might also be interested in another Raspberry-Pi cluster I've maintained for years, the [Raspberry Pi Dramble](https://www.pidramble.com), which is a Kubernetes Pi cluster in my basement that hosts the Drupal website [www.pidramble.com](https://www.pidramble.com).
+You might also be interested in another Raspberry-Pi cluster I've maintained for years, the [Raspberry Pi Dramble](https://www.pidramble.com), which is a Kubernetes Pi cluster in my basement that hosts [www.pidramble.com](https://www.pidramble.com).
 
 ## Usage
 
@@ -29,8 +29,8 @@ Then, you can deploy _all_ the applications configured in this repository with t
 
      These commands can be consolidated into one `ansible-galaxy install` command once Ansible 2.10 is released.
 
-  3. Make sure you have the Kubernetes config file for the Turing Pi cluster available locally in the path `~/.kube/config-turing-pi`.
-  4. Copy the `example.hosts.ini` inventory file to `hosts.ini`. Make sure it has the `master` and `node`s configured correctly.
+  3. Copy the `example.hosts.ini` inventory file to `hosts.ini`. Make sure it has the `master` and `node`s configured correctly.
+  4. Edit the `ingress_server_ip` and `load_balancer_server_ip` in `group_vars/all.yml` and set them each to an IP address of one of the nodes.
   5. Run the playbook:
 
      ```
@@ -103,4 +103,4 @@ Now you can go back to the steps above under 'Usage' to set up applications insi
 
 ## Author
 
-The repository was created by [Jeff Geerling](https://www.jeffgeerling.com), who writes [Ansible for DevOps](https://www.ansiblefordevops.com) and [Ansible for Kubernetes](https://www.ansibleforkubernetes.com).
+The repository was created in 2020 by [Jeff Geerling](https://www.jeffgeerling.com), who writes [Ansible for DevOps](https://www.ansiblefordevops.com) and [Ansible for Kubernetes](https://www.ansibleforkubernetes.com).

group_vars/all.yml

@@ -1,2 +1,11 @@
 ---
 ansible_user: pirate
+helm_arch: arm
+
+# Turing Pi.
+# ingress_server_ip: 10.0.100.74
+# load_balancer_server_ip: 10.0.100.99
+
+# Dramble.
+ingress_server_ip: 10.0.100.83
+load_balancer_server_ip: 10.0.100.131

main.yml

@@ -12,32 +12,15 @@
   collections:
     - community.kubernetes
 
-  vars:
-    helm_arch: arm
-
   environment:
     # The location of the kubeconfig file on the master.
     K8S_AUTH_KUBECONFIG: ~/.kube/config
     PATH: "~/go/bin:{{ ansible_env.PATH }}"
 
-  pre_tasks:
-    - name: Ensure required dependencies are installed.
-      package:
-        name:
-          - python3-setuptools
-          - build-essential
-          - golang
-          - git
-        state: present
-      become: true
-
-    - name: Ensure openshift Python library is installed.
-      pip:
-        name: openshift
-        state: present
-      become: true
-
   roles:
+    - role: setup
+      tags: ['setup']
+
     - role: cluster_monitoring
       tags: ['monitoring', 'prometheus']
 
@@ -52,3 +35,6 @@
 
     - role: pihole
       tags: ['pihole']
+
+    - role: status
+      tags: ['status', 'debug']

roles/drupal/files/drupal.yml

@@ -106,7 +106,7 @@ metadata:
   namespace: drupal
 spec:
   rules:
-    - host: drupal.10.0.100.74.nip.io
+    - host: drupal.{{ ingress_server_ip }}.nip.io
       http:
         paths:
           - path: /

roles/drupal/tasks/main.yml

@@ -8,7 +8,7 @@
 
 - name: Apply drupal manifests.
   k8s:
-    definition: "{{ lookup('file', 'files/' + item ) }}"
+    definition: "{{ lookup('template', 'files/' + item ) }}"
     state: present
   loop:
     - mariadb.yml

roles/pihole/tasks/main.yml

@@ -24,10 +24,10 @@
       ingress:
         enabled: true
       serviceTCP:
-        loadBalancerIP: '10.0.100.99'
+        loadBalancerIP: '{{ load_balancer_server_ip }}'
         type: LoadBalancer
       serviceUDP:
-        loadBalancerIP: '10.0.100.99'
+        loadBalancerIP: '{{ load_balancer_server_ip }}'
         type: LoadBalancer
       resources:
         limits:

roles/setup/tasks/main.yml

@@ -0,0 +1,21 @@
+---
+- name: Ensure apt caches are up to date.
+  apt:
+    update_cache: true
+    cache_valid_time: 3600
+
+- name: Ensure required dependencies are installed.
+  package:
+    name:
+      - python3-setuptools
+      - build-essential
+      - golang
+      - git
+    state: present
+  become: true
+
+- name: Ensure openshift Python library is installed.
+  pip:
+    name: openshift
+    state: present
+  become: true

roles/status/meta/main.yml

@@ -0,0 +1,3 @@
+---
+collections:
+  - community.kubernetes

roles/status/tasks/main.yml

@@ -0,0 +1,19 @@
+---
+- name: Get Ingress records from monitoring namespace.
+  k8s_info:
+    api_version: extensions/v1beta1
+    kind: Ingress
+    namespace: monitoring
+  register: monitoring_ingress
+
+- name: Print relevant addresses.
+  debug:
+    msg:
+      - "http://{{ monitoring_ingress['resources'][0]['spec']['rules'][0]['host'] }}/"
+      - "http://{{ monitoring_ingress['resources'][1]['spec']['rules'][0]['host'] }}/"
+      - "http://{{ monitoring_ingress['resources'][2]['spec']['rules'][0]['host'] }}/"
+      - "Drupal: http://drupal.{{ ingress_server_ip }}.nip.io/"
+      - "Wordpress: http://wordpress.{{ ingress_server_ip }}.nip.io/"
+      - "Minecraft: (`kubectl get service -n minecraft`)"
+      - "Pi-hole: http://pi.hole/ (add record for {{ load_balancer_server_ip }} to /etc/hosts)"
+  tags: ['debug']

roles/wordpress/templates/wordpress.yml

@@ -87,7 +87,7 @@ metadata:
   namespace: wordpress
 spec:
   rules:
-    - host: wordpress.10.0.100.74.nip.io
+    - host: wordpress.{{ ingress_server_ip }}.nip.io
       http:
         paths:
           - path: /