103 lines
2.4 KiB
Ruby
103 lines
2.4 KiB
Ruby
# frozen_string_literal: true
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module Importers
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class PrometheusMetric < ActiveRecord::Base
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enum group: {
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# built-in groups
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nginx_ingress: -1,
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ha_proxy: -2,
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aws_elb: -3,
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nginx: -4,
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kubernetes: -5,
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# custom groups
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business: 0,
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response: 1,
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system: 2
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}
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scope :common, -> { where(common: true) }
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GROUP_TITLES = {
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business: _('Business metrics (Custom)'),
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response: _('Response metrics (Custom)'),
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system: _('System metrics (Custom)'),
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nginx_ingress: _('Response metrics (NGINX Ingress)'),
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ha_proxy: _('Response metrics (HA Proxy)'),
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aws_elb: _('Response metrics (AWS ELB)'),
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nginx: _('Response metrics (NGINX)'),
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kubernetes: _('System metrics (Kubernetes)')
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}.freeze
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end
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class CommonMetricsImporter
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MissingQueryId = Class.new(StandardError)
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attr_reader :content
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def initialize(filename = 'common_metrics.yml')
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@content = YAML.load_file(Rails.root.join('config', 'prometheus', filename))
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end
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def execute
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PrometheusMetric.reset_column_information
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process_content do |id, attributes|
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find_or_build_metric!(id)
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.update!(**attributes)
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end
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end
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private
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def process_content(&blk)
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content.map do |group|
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process_group(group, &blk)
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end
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end
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def process_group(group, &blk)
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attributes = {
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group: find_group_title_key(group['group'])
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}
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group['metrics'].map do |metric|
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process_metric(metric, attributes, &blk)
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end
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end
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def process_metric(metric, attributes, &blk)
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attributes = attributes.merge(
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title: metric['title'],
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y_label: metric['y_label'])
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metric['queries'].map do |query|
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process_metric_query(query, attributes, &blk)
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end
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end
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def process_metric_query(query, attributes, &blk)
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attributes = attributes.merge(
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legend: query['label'],
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query: query['query_range'],
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unit: query['unit'])
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yield(query['id'], attributes)
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end
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def find_or_build_metric!(id)
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raise MissingQueryId unless id
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PrometheusMetric.common.find_by(identifier: id) ||
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PrometheusMetric.new(common: true, identifier: id)
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end
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def find_group_title_key(title)
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PrometheusMetric.groups[find_group_title(title)]
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end
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def find_group_title(title)
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PrometheusMetric::GROUP_TITLES.invert[title]
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end
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end
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end
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