Add support for textfile collector (#42)

[feature]

Create a default textfile collector directory and enable it by default.

defaults/main.yml

@@ -2,8 +2,12 @@
 node_exporter_version: 0.16.0
 node_exporter_web_listen_address: "0.0.0.0:9100"
 
+node_exporter_textfile_dir: "/var/lib/node_exporter"
+
 node_exporter_enabled_collectors:
   - systemd
+  - textfile:
+      directory: "{{ node_exporter_textfile_dir }}"
 #  - filesystem:
 #      ignored-mount-points: "^/(sys|proc|dev)($|/)"
 #      ignored-fs-types: "^(sys|proc|auto)fs$"

molecule/default/tests/test_default.py

@@ -5,6 +5,16 @@
     os.environ['MOLECULE_INVENTORY_FILE']).get_hosts('all')
 
 
+def test_directories(host):
+    dirs = [
+        "/var/lib/node_exporter"
+    ]
+    for dir in dirs:
+        d = host.file(dir)
+        assert d.is_directory
+        assert d.exists
+
+
 def test_files(host):
     files = [
         "/etc/systemd/system/node_exporter.service",

tasks/main.yml

@@ -50,6 +50,16 @@
     - restart node exporter
   when: not ansible_check_mode
 
+- name: Create texfile collector dir
+  file:
+    path: "{{ node_exporter_textfile_dir }}"
+    state: directory
+    owner: "node-exp"
+    group: "node-exp"
+    recurse: true
+    mode: 0755
+  when: node_exporter_textfile_dir != ""
+
 - name: Install libcap on Debian systems
   package:
     name: "libcap2-bin"