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# frozen_string_literal: true
module Clusters
module Concerns
module PrometheusClient
extend ActiveSupport::Concern
included do
include PrometheusAdapter
def service_name
'prometheus-prometheus-server'
end
def service_port
80
end
def prometheus_client
return unless kube_client
proxy_url = kube_client.proxy_url('service', service_name, service_port, Gitlab::Kubernetes::Helm::NAMESPACE)
# ensures headers containing auth data are appended to original k8s client options
options = kube_client.rest_client.options
.merge(prometheus_client_default_options)
.merge(headers: kube_client.headers)
Gitlab::PrometheusClient.new(proxy_url, options)
rescue Kubeclient::HttpError, Errno::ECONNRESET, Errno::ECONNREFUSED, Errno::ENETUNREACH
# If users have mistakenly set parameters or removed the depended clusters,
# `proxy_url` could raise an exception because gitlab can not communicate with the cluster.
# Since `PrometheusAdapter#can_query?` is eargely loaded on environment pages in gitlab,
# we need to silence the exceptions
end
def configured?
kube_client.present? && available?
rescue Gitlab::UrlBlocker::BlockedUrlError
false
end
private
def kube_client
cluster&.kubeclient&.core_client
end
end
end
end
end
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