Setting up the skypool nimiq client via ansible, monitoring via systemd and ruby & cron

ansible_setup-skypool-nimiq-client.yml

# used in
# -

---
- hosts: "{{ target }}"
  become: yes
  become_user: root
  become_method: sudo

  tasks:
  - name: install dependencies
    package:
      name: "{{ item }}"
      state: present
    with_items:
      - unzip
      - ruby-dev

  - name: install ruby gems
    shell: '/usr/bin/gem install httparty'
    args:
      creates: '/usr/local/bin/httparty'

  - name: create nimiq user
    user:
      name: nimiq

  - name: create programm directory
    file:
      path: /opt/nimiq
      recurse: yes
      state: directory
      owner: nimiq
      group: nimiq

  - name: get and unzip release
    unarchive:
      remote_src: yes
      src: https://github.com/skypool-org/skypool-nimiq-miner/releases/download/{{ nimiq_release_version_number }}/{{ nimiq_release_version }}.zip
      dest: /opt/nimiq
      creates: /opt/nimiq/{{ nimiq_release_version }}
      owner: nimiq
      group: nimiq
    ignore_errors: yes
    notify:
      - restart nimiq

  - name: create nimiq config file
    template:
      src: nimiq_config.txt.j2
      dest: /opt/nimiq/{{ nimiq_release_version }}/config.txt
    notify:
      - restart nimiq

  - name: create nimiq systemd file
    template:
      src: systemd_nimiq.j2
      dest: /etc/systemd/system/nimiq.service
    register: systemd_unit_file
    notify:
      - restart nimiq

  - name: reload systemd daemon
    shell: systemctl daemon-reload
    when: systemd_unit_file.changed

  - name: enable nimiq on reboot
    service:
      name: nimiq
      enabled: yes

  - name: create status checker
    template:
      src: nimiq_status_checker.rb.j2
      dest: /root/nimiq_status_checker.rb

  - name: setup cron tab for status checker
    cron:
      name: "nimiq status checker"
      minute: "*/10"
      job: "/usr/bin/ruby /root/nimiq_status_checker.rb"

  handlers:
  - name: restart nimiq
    service:
      name: nimiq
      state: restarted
...

nimiq_config.txt.j2

{
  "address": "{{ nimiq_address }}",
  "name": "{{ ansible_host }}",
  "thread": "{{ nimiq_threads }}",
  "percent": "{{ nimiq_load_percentage }}",
  "server": "auto"
}

nimiq_status_checker.rb.j2

require 'httparty'

url = 'https://api.nimiq.skypool.xyz/api/v1/pool/profile?address={{ nimiq_address }} }'
data = HTTParty.get(url).parsed_response
this_worker = data['data']['workers'].find {|worker| worker['name'] == "{{ ansible_host }}" }

if this_worker['status'] == 'offline'
  puts 'Worker appears to be offline, initiate restart...'
  res = system('systemctl restart nimiq.service')
  puts 'Worker restarted successfully' if res
end

systemd_nimiq.j2

[Unit]
Description=nimiq miner {{ nimiq_release_version_number }}

[Service]
User=nimiq
Group=nimiq
WorkingDirectory=/opt/nimiq/{{ nimiq_release_version }}
ExecStart=/opt/nimiq/{{ nimiq_release_version }}/skypool-node-client
TimeoutStopSec=10
Restart=on-failure
RestartSec=5

[Install]
WantedBy=multi-user.target

variables.yml

# github release file base name, i.e.:
# skypool-nimiq-v1.1.3-linux-x64-compat
# skypool-nimiq-v1.1.3-linux-x64-extreme
# skypool-nimiq-v1.1.3-linux-x64-fast
# skypool-nimiq-v1.1.3-linux-x64-normal
# skypool-nimiq-v1.1.3-mac-x64-fast
nimiq_release_version: <PUT_BASE_NAME_HERE>
# github tag release i.e. v1.1.2
nimiq_release_version_number: <PUT_RELEASE_TAG_HERE>
nimiq_address: <PUT_YOUR_WALLET_ADDRESS_HERE>
nimiq_threads: <PUT_AMOUNT_OF_PARALLEL_THREADS_HERE>
nimiq_load_percentage: <PUT_MAX_LOAD_HERE> # min 50, max 100