first version passing CI tests

Author: paulfantom

README.md

@@ -8,19 +8,22 @@
 
 ## Description
 
-Deploy [process_exporter](https://github.com/ncabatoff/process_exporter) using ansible.
+Deploy [process_exporter](https://github.com/ncabatoff/process-exporter) using ansible.
 
 ## Requirements
 
-- Ansible >= 2.5 (It might work on previous versions, but we cannot guarantee it)
+- Ansible >= 2.6 (It might work on previous versions, but we cannot guarantee it)
 
 ## Role Variables
 
 All variables which can be overridden are stored in [defaults/main.yml](defaults/main.yml) file as well as in table below.
 
 | Name           | Default Value | Description                        |
 | -------------- | ------------- | -----------------------------------|
+| `process_exporter_version` | "0.5.0" | Process exporter package version. Also accepts latest as parameter |
 | `process_exporter_web_listen_address` | "0.0.0.0:9256" | Address on which process_exporter will listen |
+| `process_exporter_config_dir` | "/etc/process_exporter" | Path to directory with process_exporter configuration |
+| `process_exporter_names` | [] | Processes which should be monitored. Syntax is the same as in https://github.com/ncabatoff/process-exporter#using-a-config-file |
 
 ## Example
 
@@ -33,10 +36,6 @@ Use it in a playbook as follows:
     - cloudalchemy.process_exporter
 ```
 
-### Demo site
-
-We provide demo site for full monitoring solution based on prometheus and grafana. Repository with code and links to running instances is [available on github](https://github.com/cloudalchemy/demo-site) and site is hosted on [DigitalOcean](https://digitalocean.com).
-
 ## Local Testing
 
 The preferred way of locally testing the role is to use Docker and [molecule](https://github.com/metacloud/molecule) (v2.x). You will have to install Docker on your system. See "Get started" for a Docker package suitable to for your system.
@@ -50,7 +49,7 @@ tox
 ```
 To run a custom molecule command on custom environment with only default test scenario:
 ```sh
-tox -e py27-ansible25 -- molecule test -s default
+tox -e py27-ansible28 -- molecule test -s default
 ```
 For more information about molecule go to their [docs](http://molecule.readthedocs.io/en/latest/).
 

defaults/main.yml

@@ -1,2 +1,9 @@
 ---
+process_exporter_version: "0.5.0"
+
 process_exporter_web_listen_address: "0.0.0.0:9256"
+
+process_exporter_config_dir: '/etc/process_exporter'
+
+# Process names
+process_exporter_names: []

meta/main.yml

@@ -19,7 +19,7 @@ galaxy_info:
         - 7
     - name: Fedora
       versions:
-        - 30
+        - 27
   galaxy_tags:
     - monitoring
 

molecule/default/molecule.yml

@@ -37,7 +37,7 @@ platforms:
     volumes:
       - /sys/fs/cgroup:/sys/fs/cgroup:ro
   - name: fedora
-    image: paulfantom/fedora-molecule:30
+    image: paulfantom/fedora-molecule:27
     docker_host: "${DOCKER_HOST:-unix://var/run/docker.sock}"
     privileged: true
     volumes:

molecule/default/tests/test_default.py

@@ -5,9 +5,20 @@
     os.environ['MOLECULE_INVENTORY_FILE']).get_hosts('all')
 
 
+def test_directories(host):
+    dirs = [
+        "/etc/process_exporter"
+    ]
+    for dir in dirs:
+        d = host.file(dir)
+        assert d.is_directory
+        assert d.exists
+
+
 def test_files(host):
     files = [
         "/etc/systemd/system/process_exporter.service",
+        "/usr/local/bin/process_exporter",
     ]
     for file in files:
         f = host.file(file)

tasks/configure.yml

@@ -7,3 +7,25 @@
     group: root
     mode: 0644
   notify: restart process_exporter
+
+- name: Create/Update configuration file
+  copy:
+    dest: "{{ process_exporter_config_dir }}/config.yml"
+    content: |
+      process_names:
+      {{ process_exporter_names | to_nice_yaml }}
+    backup: false
+    owner: root
+    mode: 0640
+  when:
+    - process_exporter_names != []
+
+- name: Allow process_exporter port in SELinux on RedHat OS family
+  seport:
+    ports: "{{ process_exporter_web_listen_address.split(':')[-1] }}"
+    proto: tcp
+    setype: http_port_t
+    state: present
+  when:
+    - ansible_version.full is version_compare('2.4', '>=')
+    - ansible_selinux.status == "enabled"

tasks/install.yml

@@ -1,4 +1,14 @@
 ---
+- name: Install dependencies
+  package:
+    name: "{{ item }}"
+    state: present
+  register: _install_dep_packages
+  until: _install_dep_packages is success
+  retries: 5
+  delay: 2
+  with_items: "{{ process_exporter_dependencies }}"
+
 - name: Create the process_exporter group
   group:
     name: "{{ process_exporter_system_group }}"
@@ -14,3 +24,49 @@
     system: true
     createhome: false
     home: /
+
+- name: create prometheus data directory
+  file:
+    path: "{{ process_exporter_config_dir }}"
+    state: directory
+    owner: "{{ process_exporter_system_user }}"
+    group: "{{ process_exporter_system_group }}"
+    mode: 0755
+
+- name: Download process_exporter binary to local folder
+  become: false
+  get_url:
+    url: "https://github.com/ncabatoff/process-exporter/releases/download/v{{ process_exporter_version }}/process-exporter-{{ process_exporter_version }}.linux-{{ go_arch }}.tar.gz"
+    dest: "/tmp/process-exporter-{{ process_exporter_version }}.linux-{{ go_arch }}.tar.gz"
+    checksum: "sha256:{{ process_exporter_checksum }}"
+  register: _download_binary
+  until: _download_binary is succeeded
+  retries: 5
+  delay: 2
+  delegate_to: localhost
+  check_mode: false
+
+- name: Unpack process_exporter binary
+  become: false
+  unarchive:
+    src: "/tmp/process-exporter-{{ process_exporter_version }}.linux-{{ go_arch }}.tar.gz"
+    dest: "/tmp"
+    creates: "/tmp/process-exporter-{{ process_exporter_version }}.linux-{{ go_arch }}/process-exporter"
+  delegate_to: localhost
+  check_mode: false
+
+- name: Create /usr/local/bin
+  file:
+    path: /usr/local/bin
+    state: directory
+    mode: 0755
+
+- name: Propagate process_exporter binaries
+  copy:
+    src: "/tmp/process-exporter-{{ process_exporter_version }}.linux-{{ go_arch }}/process-exporter"
+    dest: "/usr/local/bin/process_exporter"
+    mode: 0755
+    owner: root
+    group: root
+  notify: restart process_exporter
+  when: not ansible_check_mode

tasks/preflight.yml

@@ -3,3 +3,50 @@
   fail:
     msg: "This module only works with systemd"
   when: ansible_service_mgr != 'systemd'
+
+- name: Get systemd version
+  command: systemctl --version
+  changed_when: false
+  check_mode: false
+  register: __systemd_version
+  tags:
+    - skip_ansible_lint
+
+- name: Naive assertion of proper listen address
+  assert:
+    that:
+      - "':' in process_exporter_web_listen_address"
+
+- block:
+    - name: Get latest release
+      uri:
+        url: "https://api.github.com/repos/ncabatoff/process-exporter/releases/latest"
+        method: GET
+        return_content: true
+        status_code: 200
+        body_format: json
+        validate_certs: false
+        user: "{{ lookup('env', 'GH_USER') | default(omit) }}"
+        password: "{{ lookup('env', 'GH_TOKEN') | default(omit) }}"
+      no_log: true
+      register: _latest_release
+      until: _latest_release.status == 200
+      retries: 5
+
+    - name: "Set process_exporter version to {{ _latest_release.json.tag_name[1:] }}"
+      set_fact:
+        process_exporter_version: "{{ _latest_release.json.tag_name[1:] }}"
+  when: process_exporter_version == "latest"
+  delegate_to: localhost
+  run_once: true
+
+- name: Get checksum list from github
+  set_fact:
+    _checksums: "{{ lookup('url', 'https://github.com/ncabatoff/process-exporter/releases/download/v' + process_exporter_version + '/' + 'process-exporter_' + process_exporter_version + '_checksums.txt', wantlist=True) | list }}"
+  run_once: true
+
+- name: "Get checksum for {{ go_arch }} architecture"
+  set_fact:
+    process_exporter_checksum: "{{ item.split(' ')[0] }}"
+  with_items: "{{ _checksums }}"
+  when: "('linux-' + go_arch + '.tar.gz') in item"

templates/process_exporter.service.j2

@@ -1,15 +1,20 @@
 {{ ansible_managed | comment }}
 
 [Unit]
-Description=process_exporter
+Description=Process Exporter for Prometheus
 After=network-online.target
 StartLimitInterval=0
 
 [Service]
 Type=simple
 User={{ process_exporter_system_user }}
 Group={{ process_exporter_system_group }}
-ExecStart=/usr/local/bin/process_exporter
+ExecStart=/usr/local/bin/process_exporter \
+{% if process_exporter_names != [] -%}
+	--config.path {{ process_exporter_config_dir }}/config.yaml \
+{% endif -%}
+	--web.listen-address={{ process_exporter_web_listen_address }}
+
 SyslogIdentifier=process_exporter
 Restart=always
 RestartSec=1

vars/debian.yml

@@ -1 +1,2 @@
 ---
+process_exporter_dependencies: []