# confdroid_prometheus::params.pp
# Module name: confdroid_prometheus
# Author: Arne Teuke (arne_teuke@confdroid.com)
# @summary Class holds all parameters for the confdroid_prometheus module.
# @param [String] reqpackage_prom the prometheus package
# @param [String] reqpackage_ne the node_exporter package
# @param [String] pkg_ensure which version of the package to install
# @param [boolean] manage_prometheus whether to manage prometheus
# @param [boolean] manage_node_exporter whether to manage node exporter
# @param [boolean] ps_manage_fw whether to manage the firewall
# @param [String] ps_prom_host the fqdn of the prometheus server
# @param [String] ps_fw_prefix the firewall rule prefix
# @param [String] ps_main_port the firewall main port for prometheus
# @param [String] ps_auth_user the username for authentication
# @param [String] ps_auth_pass the password for authentication
# @param [String] ps_web_pass the password for web authentication
# @param [String] ps_retention_time tsdb retention time
# @param [String] ps_retention_size tsdb retention size
# @param [String] ps_wal_seg_size WAL segment size
# @param [String] ps_min_block_dur tsdb minimum block duration
# @param [String] ps_max_block_dur tsdb maximum block duration
# @param [String] ps_max_mem hard memory ceiling
# @param [String] ps_high_mem soft limit to make kernel reclaim earlier
# @param [String] ps_swap_mem allow swap, but limit it
# @param [String] ps_oom_score OOM killer choosing prometheus
# @param [String] ps_max_procs reduce parallel WAL replay workers
# @param [Boolean] ps_write_external whether to allow remote postgres
# @param [String] ps_auth_ext_user user for writing to extern instance
# @param [String] ps_auth_ext_pass password for writing to extern instance
# @param [String] ps_external_url the full url for the remote write point
# @param [Boolean] ps_enable_pruning whether to allow pruning local blocks
# @param [String] ps_pruning_dir the directory for the pruning script
# @param [String] ps_pruning_file the url and filename for the pruning script
# @param [String] ps_env_file the url and filename for the env file
# @param [String] ps_pg_host the host running the database for cold metrics
# @param [String] ps_pg_port the port for the database for cold metrics
# @param [String] ps_pg_db the database for cold metrics
# @param [String] ps_pg_user the read-only user for the db for cold metrics
# @param [String] ps_pg_pass the password for the db for cold metrics
# @param [Boolean] ps_dry_run (true = just log, false = actually delete blocks)
# @param [String] ps_min_age_hours Minimum block age in hours before pruning
# @param [String] ps_grace_hours Grace period in hours to be extra safe
# @param [String] ps_sql_template the SQL template to use for checks.
##############################################################################
class confdroid_prometheus::params (

  # installation
  String $reqpackage_prom       = 'prometheus2',
  String $reqpackage_ne         = 'node_exporter',
  String $pkg_ensure            = 'present',

  # config logic
  Boolean $manage_prometheus    = false,
  Boolean $manage_node_exporter = false,
  Boolean $ps_manage_fw         = false,
  String $ps_prom_host          = 'prometheus.example.net',

  # firewall
  String $ps_fw_prefix          = '50',
  String $ps_main_port          = '9090',

  # auth prometheus
  String $ps_auth_user          = 'changeme',
  String $ps_auth_pass          = 'changeme',
  String $ps_web_pass           = 'changeme',

  # auth remote
  String $ps_auth_ext_user      = 'changeme',
  String $ps_auth_ext_pass      = 'changeme',

  # storage
  String $ps_retention_time     = '15d',
  String $ps_retention_size     = '20GB',
  String $ps_wal_seg_size       = '50MB',
  String $ps_min_block_dur      = '2h',
  String $ps_max_block_dur      = '2h',

  # service
  String $ps_max_mem            = '6G',
  String $ps_high_mem           = '5G',
  String $ps_swap_mem           = '4G',
  String $ps_oom_score          = '500',
  String $ps_max_procs          = '1',

  # remote write external
  Boolean $ps_write_external    = false,
  String $ps_external_url       = 'http://changeme.local',

  # pruning script
  Boolean $ps_enable_pruning    = false,
  String $ps_pruning_dir        = '/opt/prometheus-prune',
  String $ps_pruning_file       = "${ps_pruning_dir}/prune_prometheus_pg.sh",
  String $ps_env_file           = "${ps_pruning_dir}/prune.env",
  String $ps_pg_host            = 'localhost',
  String $ps_pg_port            = '5432',
  String $ps_pg_db              = 'prometheus',
  String $ps_pg_user            = 'readaccess',
  String $ps_pg_pass            = 'Changeme',
  Boolean $ps_dry_run           = true,
  String $ps_min_age_hours      = '4',
  String $ps_grace_hours        = '1',
  String $ps_sql_template       = 'Changeme',

) {
  # defaults
  $fqdn                   = $facts['networking']['fqdn']
  $domain                 = $facts['networking']['domain']
  $os_name                = $facts['os']['name']
  $os_release             = $facts['os']['release']['major']

  # dirs
  $ps_main_dir            = '/etc/prometheus'
  $ps_system_file_dir     = '/etc/systemd/system/prometheus.service.d'
  $ps_system_dir          = '/etc/systemd/system/'

  # files
  $ps_main_file           = "${ps_main_dir}/prometheus.yml"
  $ps_web_config_file     = "${ps_main_dir}/web.yml"
  $ps_system_service_file = "${ps_system_file_dir}/override.conf"
  $ps_pruning_svc_file    = "${ps_system_dir}/prometheus-prune.service"
  $ps_pruning_timer_file  = "${ps_system_dir}/prometheus-prune.timer"
  $ps_prune_log_file      = '/var/log/prometheus-prune.log'

  # services
  $ps_prom_service        = 'prometheus'
  $ps_ne_service          = 'node_exporter'
  $ps_prune_service       = 'prometheus-prune.service'
  $ps_prune_timer         = 'prometheus-prune.timer'

  # includes must be last
  include confdroid_prometheus::main::config
}