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module Gitlab
module Metrics
class UnicornSampler < BaseSampler
def initialize(interval)
super(interval)
end
def unicorn_active_connections
@unicorn_active_connections ||= Gitlab::Metrics.gauge(:unicorn_active_connections, 'Unicorn active connections', {}, :max)
end
def unicorn_queued_connections
@unicorn_queued_connections ||= Gitlab::Metrics.gauge(:unicorn_queued_connections, 'Unicorn queued connections', {}, :max)
end
def enabled?
# Raindrops::Linux.tcp_listener_stats is only present on Linux
unicorn_with_listeners? && Raindrops::Linux.respond_to?(:tcp_listener_stats)
end
def sample
Raindrops::Linux.tcp_listener_stats(tcp_listeners).each do |addr, stats|
unicorn_active_connections.set({ type: 'tcp', address: addr }, stats.active)
unicorn_queued_connections.set({ type: 'tcp', address: addr }, stats.queued)
end
Raindrops::Linux.unix_listener_stats(unix_listeners).each do |addr, stats|
unicorn_active_connections.set({ type: 'unix', address: addr }, stats.active)
unicorn_queued_connections.set({ type: 'unix', address: addr }, stats.queued)
end
end
private
def tcp_listeners
@tcp_listeners ||= Unicorn.listener_names.grep(%r{\A[^/]+:\d+\z})
end
def unix_listeners
@unix_listeners ||= Unicorn.listener_names - tcp_listeners
end
def unicorn_with_listeners?
defined?(Unicorn) && Unicorn.listener_names.any?
end
end
end
end
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