add pushgateway role

roles/pushgateway/defaults/main.yaml

@@ -0,0 +1,42 @@
+---
+pushgateway_go_arch_map:
+  i386: '386'
+  x86_64: 'amd64'
+
+pushgateway_go_arch: "{{ pushgateway_go_arch_map[ansible_architecture] | default('amd64') }}"
+
+pushgateway_service_name: pushgateway.service
+pushgateway_service_enabled: true
+pushgateway_service_state: started
+
+pushgateway_version_regex: ^pushgateway, version ([\d.]+)
+
+pushgateway_github_project_url: https://github.com/prometheus/pushgateway
+pushgateway_release_file: "pushgateway-{{ pushgateway_version }}.{{ ansible_system | lower }}-{{ pushgateway_go_arch }}.tar.gz"
+pushgateway_release_url: "{{ pushgateway_github_project_url }}/releases/download/v{{ pushgateway_version }}/{{ pushgateway_release_file }}"
+pushgateway_checksum_url: "{{ pushgateway_github_project_url }}/releases/download/v{{ pushgateway_version }}/sha256sums.txt"
+pushgateway_download_path: "/tmp/{{ pushgateway_release_file }}"
+pushgateway_unarchive_dest_path: /tmp
+pushgateway_extracted_path: "{{ pushgateway_download_path | replace('.tar.gz', '') }}"
+
+pushgateway_user: pushgateway
+pushgateway_user_state: present
+pushgateway_user_shell: /usr/sbin/nologin
+
+pushgateway_group: pushgateway
+pushgateway_group_state: "{{ pushgateway_user_state | default('present') }}"
+
+pushgateway_etc_path: /etc/pushgateway
+pushgateway_etc_owner: root
+pushgateway_etc_group: root
+pushgateway_etc_mode: "0755"
+
+pushgateway_var_path: /var/lib/pushgateway
+pushgateway_var_owner: "{{ pushgateway_user }}"
+pushgateway_var_group: "{{ pushgateway_group }}"
+pushgateway_var_mode: "0755"
+
+pushgateway_bin_path: /usr/local/bin
+
+pushgateway_web_listen_address: 0.0.0.0:9091
+pushgateway_port: "{{ pushgateway_web_listen_address.split(':')[1] }}"

roles/pushgateway/handlers/main.yaml

@@ -0,0 +1,11 @@
+---
+- name: restart pushgateway
+  systemd:
+    name: pushgateway.service
+    daemon_reload: true
+    state: restarted
+
+- name: reload pushgateway
+  service:
+    name: pushgateway.service
+    state: reloaded

roles/pushgateway/tasks/configure.yaml

@@ -0,0 +1,47 @@
+---
+- name: create group
+  group:
+    name: "{{ pushgateway_group }}"
+    system: true
+    state: "{{ pushgateway_group_state | default('present') }}"
+
+- name: create user
+  user:
+    name: "{{ pushgateway_user }}"
+    system: true
+    shell: "{{ pushgateway_user_shell }}"
+    group: "{{ pushgateway_group }}"
+    createhome: false
+    home: "{{ pushgateway_var_path }}"
+    state: "{{ pushgateway_user_state | default('present') }}"
+
+- name: create etc path
+  file:
+    path: "{{ pushgateway_etc_path }}"
+    state: directory
+    owner: "{{ pushgateway_etc_owner }}"
+    group: "{{ pushgateway_etc_group }}"
+    mode: "{{ pushgateway_etc_mode }}"
+
+- name: create var path
+  file:
+    path: "{{ pushgateway_var_path }}"
+    state: directory
+    owner: "{{ pushgateway_var_owner }}"
+    group: "{{ pushgateway_var_group }}"
+    mode: "{{ pushgateway_var_mode }}"
+
+- name: configure systemd template
+  template:
+    src: pushgateway.service.j2
+    dest: /etc/systemd/system/pushgateway.service
+    owner: root
+    group: root
+    mode: 0444
+  notify: restart pushgateway
+
+- name: manage service
+  service:
+    name: "{{ pushgateway_service_name }}"
+    enabled: "{{ pushgateway_service_enabled }}"
+    state: "{{ pushgateway_service_state }}"

roles/pushgateway/tasks/install.yaml

@@ -0,0 +1,31 @@
+---
+- block:
+  - name: download archive
+    get_url:
+      url: "{{ pushgateway_release_url }}"
+      dest: "{{ pushgateway_download_path }}"
+      checksum: "{{ pushgateway_checksum }}"
+    register: dl
+    until: dl is success
+    retries: 5
+    delay: 10
+
+  - name: extract archive
+    unarchive:
+      src: "{{ pushgateway_download_path }}"
+      dest: "{{ pushgateway_unarchive_dest_path }}"
+      creates: "{{ pushgateway_extracted_path }}/pushgateway"
+      remote_src: true
+
+  - name: install binaries
+    copy:
+      src: "{{ pushgateway_extracted_path }}/{{ item }}"
+      dest: "{{ pushgateway_bin_path }}/{{ item }}"
+      owner: root
+      group: root
+      mode: 0755
+      remote_src: true
+    loop:
+      - pushgateway
+    notify: restart pushgateway
+  when: pushgateway_version != pushgateway_local_version

roles/pushgateway/tasks/main.yaml

@@ -0,0 +1,33 @@
+---
+- name: gather os specific variables
+  include_vars: "{{ lookup('first_found', possible_files) }}"
+  vars:
+    possible_files:
+      files:
+        - "{{ ansible_distribution }}-{{ ansible_distribution_version }}.yaml"
+        - "{{ ansible_distribution }}.yaml"
+        - "{{ ansible_os_family }}.yaml"
+        - "default.yaml"
+      paths:
+        - vars
+
+- name: include os specific tasks
+  include_tasks: "{{ lookup('first_found', possible_files) }}"
+  vars:
+    possible_files:
+      files:
+        - "{{ ansible_distribution }}-{{ ansible_distribution_version }}.yaml"
+        - "{{ ansible_distribution }}.yaml"
+        - "{{ ansible_os_family }}.yaml"
+        - "default.yaml"
+      paths:
+        - tasks
+
+- include: pre.yaml
+
+- include: install.yaml
+
+- include: configure.yaml
+
+  #- include: nginx.yaml
+  #  when: '"nginx" in ansible_play_role_names'

roles/pushgateway/tasks/pre.yaml

@@ -0,0 +1,50 @@
+---
+- name: determine if installed
+  stat:
+    path: "{{ pushgateway_bin_path }}/pushgateway"
+  register: st
+
+- name: set pushgateway_installed
+  set_fact:
+    pushgateway_installed: "{{ st.stat.exists | bool }}"
+
+- block:
+  - name: determine latest version
+    uri:
+      url: https://api.github.com/repos/prometheus/pushgateway/releases/latest
+      return_content: true
+      body_format: json
+    register: _latest_version
+    until: _latest_version.status == 200
+    retries: 3
+
+  - name: set pushgateway_version
+    set_fact:
+      pushgateway_version: "{{ _latest_version.json['tag_name'] | regex_replace('^v', '') }}"
+
+- block:
+  - name: determine installed version
+    command: "{{ pushgateway_bin_path }}/pushgateway --version"
+    register: _installed_version_string
+    changed_when: false
+
+  - name: set pushgateway_local_version
+    set_fact:
+      pushgateway_local_version: "{{ _installed_version_string.stderr | regex_search(pushgateway_version_regex, '\\1') | first }}"
+  when: pushgateway_installed
+
+- name: set pushgateway_local_version to 0
+  set_fact:
+    pushgateway_local_version: "0"
+  when: not pushgateway_installed
+
+- block:
+  - name: get checksums
+    set_fact:
+      _checksums: "{{ lookup('url', pushgateway_checksum_url, wantlist=True) }}"
+
+  - name: set pushgateway_checksum
+    set_fact:
+      pushgateway_checksum: "sha256:{{ item.split(' ') | first }}"
+    loop: "{{ _checksums }}"
+    when: "pushgateway_release_file in item"

roles/pushgateway/templates/pushgateway.service.j2

@@ -0,0 +1,34 @@
+[Unit]
+Description=Pushgateway
+After=network-online.target
+
+[Service]
+Type=simple
+User={{ pushgateway_user }}
+Group={{ pushgateway_group }}
+ExecStart={{ pushgateway_bin_path }}/pushgateway \
+{% if pushgateway_web_external_url is defined %}
+  --web.external-url={{ pushgateway_web_external_url }} \
+{% endif %}
+{% if pushgateway_web_route_prefix is defined %}
+  --web.route-prefix={{ pushgateway_web_route_prefix }} \
+{% endif %}
+{% if pushgateway_web_listen_address is defined %}
+  --web.listen-address={{ pushgateway_web_listen_address }} \
+{% endif %}
+{% if pushgateway_web_admin_api is defined %}
+  --web.enable-admin-api={{ pushgateway_web_admin_api }} \
+{% endif %}
+{% if pushgateway_persistence_file is defined %}
+  --persistence.file={{ pushgateway_persistence_file }} \
+{% endif %}
+{% if pushgateway_persistence_interval is defined %}
+  --persistence.interval={{ pushgateway_persistence_interval }} \
+{% endif %}
+
+
+Restart=always
+RestartSec=1
+
+[Install]
+WantedBy=multi-user.target