debian-mirror-gitlab/app/models/project_services/prometheus_service.rb

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# frozen_string_literal: true
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class PrometheusService < MonitoringService
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include PrometheusAdapter
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# Access to prometheus is directly through the API
prop_accessor :api_url
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prop_accessor :google_iap_service_account_json
prop_accessor :google_iap_audience_client_id
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boolean_accessor :manual_configuration
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# We need to allow the self-monitoring project to connect to the internal
# Prometheus instance.
# Since the internal Prometheus instance is usually a localhost URL, we need
# to allow localhost URLs when the following conditions are true:
# 1. project is the self-monitoring project.
# 2. api_url is the internal Prometheus URL.
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with_options presence: true do
validates :api_url, public_url: true, if: ->(object) { object.manual_configuration? && !object.allow_local_api_url? }
validates :api_url, url: true, if: ->(object) { object.manual_configuration? && object.allow_local_api_url? }
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end
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before_save :synchronize_service_state
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after_save :clear_reactive_cache!
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after_commit :track_events
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after_create_commit :create_default_alerts
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def initialize_properties
if properties.nil?
self.properties = {}
end
end
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def show_active_box?
false
end
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def title
'Prometheus'
end
def description
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s_('PrometheusService|Time-series monitoring service')
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end
def self.to_param
'prometheus'
end
def fields
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result = [
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{
type: 'checkbox',
name: 'manual_configuration',
title: s_('PrometheusService|Active'),
required: true
},
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{
type: 'text',
name: 'api_url',
title: 'API URL',
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placeholder: s_('PrometheusService|Prometheus API Base URL, like http://prometheus.example.com/'),
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required: true
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}
]
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if Feature.enabled?(:prometheus_service_iap_auth)
result += [
{
type: 'text',
name: 'google_iap_audience_client_id',
title: 'Google IAP Audience Client ID',
placeholder: s_('PrometheusService|Client ID of the IAP secured resource (looks like IAP_CLIENT_ID.apps.googleusercontent.com)'),
autocomplete: 'off',
required: false
},
{
type: 'textarea',
name: 'google_iap_service_account_json',
title: 'Google IAP Service Account JSON',
placeholder: s_('PrometheusService|Contents of the credentials.json file of your service account, like: { "type": "service_account", "project_id": ... }'),
required: false
}
]
end
result
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end
# Check we can connect to the Prometheus API
def test(*args)
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prometheus_client.ping
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{ success: true, result: 'Checked API endpoint' }
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rescue Gitlab::PrometheusClient::Error => err
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{ success: false, result: err }
end
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def prometheus_client
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return unless should_return_client?
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options = { allow_local_requests: allow_local_api_url? }
if Feature.enabled?(:prometheus_service_iap_auth) && behind_iap?
# Adds the Authorization header
options[:headers] = iap_client.apply({})
end
Gitlab::PrometheusClient.new(api_url, options)
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end
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def prometheus_available?
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return false if template?
return false unless project
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project.all_clusters.enabled.eager_load(:application_prometheus).any? do |cluster|
cluster.application_prometheus&.available?
end
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end
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def allow_local_api_url?
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allow_local_requests_from_web_hooks_and_services? ||
(self_monitoring_project? && internal_prometheus_url?)
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end
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def configured?
should_return_client?
end
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private
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def self_monitoring_project?
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project && project.id == current_settings.self_monitoring_project_id
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end
def internal_prometheus_url?
api_url.present? && api_url == ::Gitlab::Prometheus::Internal.uri
end
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def allow_local_requests_from_web_hooks_and_services?
current_settings.allow_local_requests_from_web_hooks_and_services?
end
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def should_return_client?
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api_url.present? && manual_configuration? && active? && valid?
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end
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def current_settings
Gitlab::CurrentSettings.current_application_settings
end
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def synchronize_service_state
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self.active = prometheus_available? || manual_configuration?
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true
end
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def track_events
if enabled_manual_prometheus?
Gitlab::Tracking.event('cluster:services:prometheus', 'enabled_manual_prometheus')
elsif disabled_manual_prometheus?
Gitlab::Tracking.event('cluster:services:prometheus', 'disabled_manual_prometheus')
end
true
end
def enabled_manual_prometheus?
manual_configuration_changed? && manual_configuration?
end
def disabled_manual_prometheus?
manual_configuration_changed? && !manual_configuration?
end
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def create_default_alerts
return unless project_id
Prometheus::CreateDefaultAlertsWorker.perform_async(project_id)
end
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def behind_iap?
manual_configuration? && google_iap_audience_client_id.present? && google_iap_service_account_json.present?
end
def iap_client
@iap_client ||= Google::Auth::Credentials.new(Gitlab::Json.parse(google_iap_service_account_json), target_audience: google_iap_audience_client_id).client
end
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end