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module Gitlab
module Metrics
extend Gitlab::CurrentSettings
RAILS_ROOT = Rails.root.to_s
METRICS_ROOT = Rails.root.join('lib', 'gitlab', 'metrics').to_s
PATH_REGEX = /^#{RAILS_ROOT}\/?/
def self.pool_size
current_application_settings[:metrics_pool_size] || 16
end
def self.timeout
current_application_settings[:metrics_timeout] || 10
end
def self.enabled?
current_application_settings[:metrics_enabled] || false
end
def self.mri?
RUBY_ENGINE == 'ruby'
end
def self.method_call_threshold
# This is memoized since this method is called for every instrumented
# method. Loading data from an external cache on every method call slows
# things down too much.
@method_call_threshold ||=
(current_application_settings[:metrics_method_call_threshold] || 10)
end
def self.pool
@pool
end
def self.hostname
@hostname
end
# Returns a relative path and line number based on the last application call
# frame.
def self.last_relative_application_frame
frame = caller_locations.find do |l|
l.path.start_with?(RAILS_ROOT) && !l.path.start_with?(METRICS_ROOT)
end
if frame
return frame.path.sub(PATH_REGEX, ''), frame.lineno
else
return nil, nil
end
end
def self.submit_metrics(metrics)
prepared = prepare_metrics(metrics)
pool.with do |connection|
prepared.each do |metric|
begin
connection.write_points([metric])
rescue StandardError
end
end
end
end
def self.prepare_metrics(metrics)
metrics.map do |hash|
new_hash = hash.symbolize_keys
new_hash[:tags].each do |key, value|
if value.blank?
new_hash[:tags].delete(key)
else
new_hash[:tags][key] = escape_value(value)
end
end
new_hash
end
end
def self.escape_value(value)
value.to_s.gsub('=', '\\=')
end
@hostname = Socket.gethostname
# When enabled this should be set before being used as the usual pattern
# "@foo ||= bar" is _not_ thread-safe.
if enabled?
@pool = ConnectionPool.new(size: pool_size, timeout: timeout) do
host = current_application_settings[:metrics_host]
user = current_application_settings[:metrics_username]
pw = current_application_settings[:metrics_password]
port = current_application_settings[:metrics_port]
InfluxDB::Client.
new(udp: { host: host, port: port }, username: user, password: pw)
end
end
end
end
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