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|
# frozen_string_literal: true
module Projects
module Prometheus
module Alerts
class NotifyService
include Gitlab::Utils::StrongMemoize
include ::IncidentManagement::Settings
# This set of keys identifies a payload as a valid Prometheus
# payload and thus processable by this service. See also
# https://prometheus.io/docs/alerting/configuration/#webhook_config
REQUIRED_PAYLOAD_KEYS = %w[
version groupKey status receiver groupLabels commonLabels
commonAnnotations externalURL alerts
].to_set.freeze
SUPPORTED_VERSION = '4'
def initialize(project, payload)
@project = project
@payload = payload
end
def execute(token, integration = nil)
return bad_request unless valid_payload_size?
return unprocessable_entity unless self.class.processable?(payload)
return unauthorized unless valid_alert_manager_token?(token, integration)
process_prometheus_alerts
ServiceResponse.success
end
def self.processable?(payload)
# Workaround for https://gitlab.com/gitlab-org/gitlab/-/issues/220496
return false unless payload
REQUIRED_PAYLOAD_KEYS.subset?(payload.keys.to_set) &&
payload['version'] == SUPPORTED_VERSION
end
private
attr_reader :project, :payload
def valid_payload_size?
Gitlab::Utils::DeepSize.new(payload).valid?
end
def firings
@firings ||= alerts_by_status('firing')
end
def alerts_by_status(status)
alerts.select { |alert| alert['status'] == status }
end
def alerts
payload['alerts']
end
def valid_alert_manager_token?(token, integration)
valid_for_manual?(token) ||
valid_for_alerts_endpoint?(token, integration) ||
valid_for_managed?(token)
end
def valid_for_manual?(token)
prometheus = project.find_or_initialize_service('prometheus')
return false unless prometheus.manual_configuration?
if setting = project.alerting_setting
compare_token(token, setting.token)
else
token.nil?
end
end
def valid_for_alerts_endpoint?(token, integration)
return false unless integration&.active?
compare_token(token, integration.token)
end
def valid_for_managed?(token)
prometheus_application = available_prometheus_application(project)
return false unless prometheus_application
if token
compare_token(token, prometheus_application.alert_manager_token)
else
prometheus_application.alert_manager_token.nil?
end
end
def available_prometheus_application(project)
alert_id = gitlab_alert_id
return unless alert_id
alert = find_alert(project, alert_id)
return unless alert
cluster = alert.environment.deployment_platform&.cluster
return unless cluster&.enabled?
return unless cluster.application_prometheus_available?
cluster.application_prometheus
end
def find_alert(project, metric)
Projects::Prometheus::AlertsFinder
.new(project: project, metric: metric)
.execute
.first
end
def gitlab_alert_id
alerts&.first&.dig('labels', 'gitlab_alert_id')
end
def compare_token(expected, actual)
return unless expected && actual
ActiveSupport::SecurityUtils.secure_compare(expected, actual)
end
def process_prometheus_alerts
alerts.each do |alert|
AlertManagement::ProcessPrometheusAlertService
.new(project, alert.to_h)
.execute
end
end
def bad_request
ServiceResponse.error(message: 'Bad Request', http_status: :bad_request)
end
def unauthorized
ServiceResponse.error(message: 'Unauthorized', http_status: :unauthorized)
end
def unprocessable_entity
ServiceResponse.error(message: 'Unprocessable Entity', http_status: :unprocessable_entity)
end
end
end
end
end
|
