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# frozen_string_literal: true
module Clusters
module Applications
class Prometheus < ApplicationRecord
include PrometheusAdapter
VERSION = '6.7.3'
self.table_name = 'clusters_applications_prometheus'
include ::Clusters::Concerns::ApplicationCore
include ::Clusters::Concerns::ApplicationStatus
include ::Clusters::Concerns::ApplicationVersion
include ::Clusters::Concerns::ApplicationData
default_value_for :version, VERSION
state_machine :status do
after_transition any => [:installed] do |application|
application.cluster.projects.each do |project|
project.find_or_initialize_service('prometheus').update(active: true)
end
end
end
def chart
'stable/prometheus'
end
def service_name
'prometheus-prometheus-server'
end
def service_port
80
end
def install_command
Gitlab::Kubernetes::Helm::InstallCommand.new(
name: name,
version: VERSION,
rbac: cluster.platform_kubernetes_rbac?,
chart: chart,
files: files,
postinstall: install_knative_metrics
)
end
def upgrade_command(values)
::Gitlab::Kubernetes::Helm::InstallCommand.new(
name: name,
version: VERSION,
rbac: cluster.platform_kubernetes_rbac?,
chart: chart,
files: files_with_replaced_values(values)
)
end
# Returns a copy of files where the values of 'values.yaml'
# are replaced by the argument.
#
# See #values for the data format required
def files_with_replaced_values(replaced_values)
files.merge('values.yaml': replaced_values)
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(headers: kube_client.headers)
RestClient::Resource.new(proxy_url, options)
rescue Kubeclient::HttpError
# 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 environement pages in gitlab,
# we need to silence the exceptions
end
private
def kube_client
cluster&.kubeclient&.core_client
end
def install_knative_metrics
["kubectl apply -f #{Clusters::Applications::Knative::METRICS_CONFIG}"] if cluster.application_knative_available?
end
end
end
end
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