ansible: download arm64/aarch64 prometheus node_exporter if applicable

ansible/roles/prometheus_node_exporter/tasks/main.yml

@@ -2,12 +2,20 @@
 - name: Create prometheus user and group
   import_tasks: prometheus_user.yml
 
-- name: Download node_exporter from GitHub
+- name: Download node_exporter from GitHub (x86_64 / amd64)
+  when: ansible_facts['architecture'] == 'x86_64'
   get_url:
     dest: /tmp/prometheus_node_exporter.tar.gz
     url: https://github.com/prometheus/node_exporter/releases/download/v0.13.0/node_exporter-0.13.0.linux-amd64.tar.gz
     checksum: sha256:2de5d1e51330c41588ed4c88bc531a3d2dccf6b4d7b99d5782d95cff27a3c049
 
+- name: Download node_exporter from GitHub (aarch64 / arm64)
+  when: ansible_facts['architecture'] == 'aarch64'
+  get_url:
+    dest: /tmp/prometheus_node_exporter.tar.gz
+    url: https://github.com/prometheus/node_exporter/releases/download/v0.13.0/node_exporter-0.13.0.linux-arm64.tar.gz
+    checksum: sha256:a7f9db18b590e068ada68d3e1edd1bd0a9db43e3ee8f69517a49768ec8988a4c
+
 - name: Create node_exporter directory
   file:
     path: /opt/prometheus_node_exporter