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Versions: 43
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Contents
module PgEngine
class HealthController < ApplicationController
rescue_from(Exception) do |error|
pg_err error
render_down
end
def show
check_redis
check_postgres
check_websocket
render_up
end
private
def check_postgres
return if User.count.is_a? Integer
raise PgEngine::Error, 'postgres is down'
end
def check_redis
return if Kredis.counter('healthcheck').increment.is_a? Integer
raise PgEngine::Error, 'redis is down'
end
# rubocop:disable Metrics/MethodLength
def check_websocket
result = nil
begin
Timeout.timeout(5) do
EM.run do
url = Rails.application.config.action_cable.url
ws = Faye::WebSocket::Client.new(url)
ws.on :message do |event|
type = JSON.parse(event.data)['type']
if type == 'welcome'
result = :success
ws.close
EM.stop
end
end
end
end
rescue Timeout::Error
raise PgEngine::Error, 'websocket server is down'
end
return if result == :success
raise PgEngine::Error, 'websocket server is down'
end
# rubocop:enable Metrics/MethodLength
def render_up
render html: html_status(color: '#005500')
end
def render_down
render html: html_status(color: '#990000'), status: :internal_server_error
end
def html_status(color:)
%(<!DOCTYPE html><html><body style="background-color: #{color}"></body></html>).html_safe
end
end
end
Version data entries
43 entries across 43 versions & 1 rubygems