156 lines
3.8 KiB
Ruby
156 lines
3.8 KiB
Ruby
# frozen_string_literal: true
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module Clusters
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module Applications
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class PrometheusConfigService
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def initialize(project, cluster, app)
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@project = project
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@cluster = cluster
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@app = app
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end
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def execute(config = {})
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if has_alerts?
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generate_alert_manager(config)
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else
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reset_alert_manager(config)
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end
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end
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private
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attr_reader :project, :cluster, :app
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def reset_alert_manager(config)
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config = set_alert_manager_enabled(config, false)
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config.delete('alertmanagerFiles')
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config['serverFiles'] ||= {}
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config['serverFiles']['alerts'] = {}
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config
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end
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def generate_alert_manager(config)
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config = set_alert_manager_enabled(config, true)
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config = set_alert_manager_files(config)
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set_alert_manager_groups(config)
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end
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def set_alert_manager_enabled(config, enabled)
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config['alertmanager'] ||= {}
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config['alertmanager']['enabled'] = enabled
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config
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end
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def set_alert_manager_files(config)
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config['alertmanagerFiles'] = {
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'alertmanager.yml' => {
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'receivers' => alert_manager_receivers_params,
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'route' => alert_manager_route_params
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}
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}
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config
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end
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def set_alert_manager_groups(config)
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config['serverFiles'] ||= {}
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config['serverFiles']['alerts'] ||= {}
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config['serverFiles']['alerts']['groups'] ||= []
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environments_with_alerts.each do |env_name, alerts|
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index = config['serverFiles']['alerts']['groups'].find_index do |group|
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group['name'] == env_name
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end
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if index
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config['serverFiles']['alerts']['groups'][index]['rules'] = alerts
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else
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config['serverFiles']['alerts']['groups'] << {
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'name' => env_name,
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'rules' => alerts
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}
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end
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end
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config
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end
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def alert_manager_receivers_params
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[
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{
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'name' => 'gitlab',
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'webhook_configs' => [
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{
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'url' => notify_url,
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'send_resolved' => true,
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'http_config' => {
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'bearer_token' => alert_manager_token
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}
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}
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]
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}
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]
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end
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def alert_manager_token
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app.alert_manager_token
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end
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def alert_manager_route_params
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{
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'receiver' => 'gitlab',
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'group_wait' => '30s',
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'group_interval' => '5m',
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'repeat_interval' => '4h'
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}
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end
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def notify_url
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::Gitlab::Routing.url_helpers
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.notify_project_prometheus_alerts_url(project, format: :json)
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end
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def has_alerts?
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environments_with_alerts.values.flatten(1).any?
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end
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def environments_with_alerts
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@environments_with_alerts ||=
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environments.each_with_object({}) do |environment, hash|
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name = rule_name(environment)
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hash[name] = alerts(environment)
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end
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end
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def rule_name(environment)
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"#{environment.name}.rules"
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end
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def alerts(environment)
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alerts = Projects::Prometheus::AlertsFinder
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.new(environment: environment)
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.execute
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alerts.map do |alert|
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hash = alert.to_param
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hash['expr'] = substitute_query_variables(hash['expr'], environment)
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hash
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end
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end
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def substitute_query_variables(query, environment)
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result = ::Prometheus::ProxyVariableSubstitutionService.new(environment, query: query).execute
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result[:params][:query]
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end
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def environments
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project.environments_for_scope(cluster.environment_scope)
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end
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end
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end
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end
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