mirror of
https://github.com/puppetlabs/vmpooler.git
synced 2026-01-26 01:58:41 -05:00
811fd8b60f
This change adds a capability to vmpooler to provision instances on demand. Without this change vmpooler only supports retrieving machines from pre-provisioned pools. Additionally, this change refactors redis interactions to reduce round trips to redis. Specifically, multi and pipelined redis commands are added where possible to reduce the number of times we are calling redis. To support the redis refactor the redis interaction has changed to leveraging a connection pool. In addition to offering multiple connections for pool manager to use, the redis interactions in pool manager are now thread safe. Ready TTL is now a global parameter that can be set as a default for all pools. A default of 0 has been removed, because this is an unreasonable default behavior, which would leave a provisioned instance in the pool indefinitely. Pool empty messages have been removed when the pool size is set to 0. Without this change, when a pool was set to a size of 0 the API and pool manager would both show that a pool is empty.
228 lines
10 KiB
Ruby
228 lines
10 KiB
Ruby
# frozen_string_literal: true
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module Vmpooler
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require 'concurrent'
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require 'date'
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require 'json'
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require 'net/ldap'
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require 'open-uri'
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require 'pickup'
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require 'rbvmomi'
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require 'redis'
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require 'set'
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require 'sinatra/base'
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require 'time'
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require 'timeout'
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require 'yaml'
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%w[api graphite logger pool_manager statsd dummy_statsd generic_connection_pool].each do |lib|
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require "vmpooler/#{lib}"
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end
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def self.config(filepath = 'vmpooler.yaml')
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# Take the config either from an ENV config variable or from a config file
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if ENV['VMPOOLER_CONFIG']
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config_string = ENV['VMPOOLER_CONFIG']
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# Parse the YAML config into a Hash
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# Whitelist the Symbol class
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parsed_config = YAML.safe_load(config_string, [Symbol])
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else
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# Take the name of the config file either from an ENV variable or from the filepath argument
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config_file = ENV['VMPOOLER_CONFIG_FILE'] || filepath
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parsed_config = YAML.load_file(config_file) if File.exist? config_file
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parsed_config[:config]['extra_config'] = ENV['EXTRA_CONFIG'] if ENV['EXTRA_CONFIG']
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if parsed_config[:config]['extra_config']
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extra_configs = parsed_config[:config]['extra_config'].split(',')
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extra_configs.each do |config|
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extra_config = YAML.load_file(config)
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parsed_config.merge!(extra_config)
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end
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end
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end
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parsed_config ||= { config: {} }
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# Bail out if someone attempts to start vmpooler with dummy authentication
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# without enbaling debug mode.
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if parsed_config.key? :auth
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if parsed_config[:auth]['provider'] == 'dummy'
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unless ENV['VMPOOLER_DEBUG']
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warning = [
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'Dummy authentication should not be used outside of debug mode',
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'please set environment variable VMPOOLER_DEBUG to \'true\' if you want to use dummy authentication'
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]
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raise warning.join(";\s")
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end
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end
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end
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# Set some configuration defaults
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parsed_config[:config]['task_limit'] = string_to_int(ENV['TASK_LIMIT']) || parsed_config[:config]['task_limit'] || 10
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parsed_config[:config]['ondemand_clone_limit'] = string_to_int(ENV['ONDEMAND_CLONE_LIMIT']) || parsed_config[:config]['ondemand_clone_limit'] || 10
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parsed_config[:config]['max_ondemand_instances_per_request'] = string_to_int(ENV['MAX_ONDEMAND_INSTANCES_PER_REQUEST']) || parsed_config[:config]['max_ondemand_instances_per_request'] || 10
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parsed_config[:config]['migration_limit'] = string_to_int(ENV['MIGRATION_LIMIT']) if ENV['MIGRATION_LIMIT']
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parsed_config[:config]['vm_checktime'] = string_to_int(ENV['VM_CHECKTIME']) || parsed_config[:config]['vm_checktime'] || 1
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parsed_config[:config]['vm_lifetime'] = string_to_int(ENV['VM_LIFETIME']) || parsed_config[:config]['vm_lifetime'] || 24
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parsed_config[:config]['max_lifetime_upper_limit'] = string_to_int(ENV['MAX_LIFETIME_UPPER_LIMIT']) || parsed_config[:config]['max_lifetime_upper_limit']
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parsed_config[:config]['ready_ttl'] = string_to_int(ENV['READY_TTL']) || parsed_config[:config]['ready_ttl'] || 60
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parsed_config[:config]['ondemand_request_ttl'] = string_to_int(ENV['ONDEMAND_REQUEST_TTL']) || parsed_config[:config]['ondemand_request_ttl'] || 5
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parsed_config[:config]['prefix'] = ENV['PREFIX'] || parsed_config[:config]['prefix'] || ''
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parsed_config[:config]['logfile'] = ENV['LOGFILE'] if ENV['LOGFILE']
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parsed_config[:config]['site_name'] = ENV['SITE_NAME'] if ENV['SITE_NAME']
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parsed_config[:config]['domain'] = ENV['DOMAIN'] if ENV['DOMAIN']
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parsed_config[:config]['clone_target'] = ENV['CLONE_TARGET'] if ENV['CLONE_TARGET']
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parsed_config[:config]['timeout'] = string_to_int(ENV['TIMEOUT']) if ENV['TIMEOUT']
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parsed_config[:config]['vm_lifetime_auth'] = string_to_int(ENV['VM_LIFETIME_AUTH']) if ENV['VM_LIFETIME_AUTH']
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parsed_config[:config]['max_tries'] = string_to_int(ENV['MAX_TRIES']) if ENV['MAX_TRIES']
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parsed_config[:config]['retry_factor'] = string_to_int(ENV['RETRY_FACTOR']) if ENV['RETRY_FACTOR']
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parsed_config[:config]['create_folders'] = true?(ENV['CREATE_FOLDERS']) if ENV['CREATE_FOLDERS']
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parsed_config[:config]['create_template_delta_disks'] = ENV['CREATE_TEMPLATE_DELTA_DISKS'] if ENV['CREATE_TEMPLATE_DELTA_DISKS']
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set_linked_clone(parsed_config)
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parsed_config[:config]['experimental_features'] = ENV['EXPERIMENTAL_FEATURES'] if ENV['EXPERIMENTAL_FEATURES']
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parsed_config[:config]['purge_unconfigured_folders'] = ENV['PURGE_UNCONFIGURED_FOLDERS'] if ENV['PURGE_UNCONFIGURED_FOLDERS']
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parsed_config[:config]['usage_stats'] = ENV['USAGE_STATS'] if ENV['USAGE_STATS']
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parsed_config[:redis] = parsed_config[:redis] || {}
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parsed_config[:redis]['server'] = ENV['REDIS_SERVER'] || parsed_config[:redis]['server'] || 'localhost'
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parsed_config[:redis]['port'] = string_to_int(ENV['REDIS_PORT']) if ENV['REDIS_PORT']
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parsed_config[:redis]['password'] = ENV['REDIS_PASSWORD'] if ENV['REDIS_PASSWORD']
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parsed_config[:redis]['data_ttl'] = string_to_int(ENV['REDIS_DATA_TTL']) || parsed_config[:redis]['data_ttl'] || 168
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parsed_config[:redis]['connection_pool_size'] = string_to_int(ENV['REDIS_CONNECTION_POOL_SIZE']) || parsed_config[:redis]['connection_pool_size'] || 10
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parsed_config[:redis]['connection_pool_timeout'] = string_to_int(ENV['REDIS_CONNECTION_POOL_TIMEOUT']) || parsed_config[:redis]['connection_pool_timeout'] || 5
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parsed_config[:statsd] = parsed_config[:statsd] || {} if ENV['STATSD_SERVER']
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parsed_config[:statsd]['server'] = ENV['STATSD_SERVER'] if ENV['STATSD_SERVER']
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parsed_config[:statsd]['prefix'] = ENV['STATSD_PREFIX'] if ENV['STATSD_PREFIX']
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parsed_config[:statsd]['port'] = string_to_int(ENV['STATSD_PORT']) if ENV['STATSD_PORT']
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parsed_config[:graphite] = parsed_config[:graphite] || {} if ENV['GRAPHITE_SERVER']
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parsed_config[:graphite]['server'] = ENV['GRAPHITE_SERVER'] if ENV['GRAPHITE_SERVER']
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parsed_config[:graphite]['prefix'] = ENV['GRAPHITE_PREFIX'] if ENV['GRAPHITE_PREFIX']
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parsed_config[:graphite]['port'] = string_to_int(ENV['GRAPHITE_PORT']) if ENV['GRAPHITE_PORT']
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parsed_config[:auth] = parsed_config[:auth] || {} if ENV['AUTH_PROVIDER']
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if parsed_config.key? :auth
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parsed_config[:auth]['provider'] = ENV['AUTH_PROVIDER'] if ENV['AUTH_PROVIDER']
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parsed_config[:auth][:ldap] = parsed_config[:auth][:ldap] || {} if parsed_config[:auth]['provider'] == 'ldap'
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parsed_config[:auth][:ldap]['host'] = ENV['LDAP_HOST'] if ENV['LDAP_HOST']
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parsed_config[:auth][:ldap]['port'] = string_to_int(ENV['LDAP_PORT']) if ENV['LDAP_PORT']
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parsed_config[:auth][:ldap]['base'] = ENV['LDAP_BASE'] if ENV['LDAP_BASE']
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parsed_config[:auth][:ldap]['user_object'] = ENV['LDAP_USER_OBJECT'] if ENV['LDAP_USER_OBJECT']
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end
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# Create an index of pool aliases
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parsed_config[:pool_names] = Set.new
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unless parsed_config[:pools]
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redis = new_redis(parsed_config[:redis]['server'], parsed_config[:redis]['port'], parsed_config[:redis]['password'])
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parsed_config[:pools] = load_pools_from_redis(redis)
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end
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# Create an index of pools by title
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parsed_config[:pool_index] = pool_index(parsed_config[:pools])
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parsed_config[:pools].each do |pool|
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parsed_config[:pool_names] << pool['name']
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pool['ready_ttl'] ||= parsed_config[:config]['ready_ttl']
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if pool['alias']
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if pool['alias'].is_a?(Array)
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pool['alias'].each do |pool_alias|
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parsed_config[:alias] ||= {}
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parsed_config[:alias][pool_alias] = [pool['name']] unless parsed_config[:alias].key? pool_alias
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parsed_config[:alias][pool_alias] << pool['name'] unless parsed_config[:alias][pool_alias].include? pool['name']
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parsed_config[:pool_names] << pool_alias
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end
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elsif pool['alias'].is_a?(String)
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parsed_config[:alias][pool['alias']] = pool['name']
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parsed_config[:pool_names] << pool['alias']
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end
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end
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end
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parsed_config[:tagfilter]&.keys&.each do |tag|
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parsed_config[:tagfilter][tag] = Regexp.new(parsed_config[:tagfilter][tag])
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end
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parsed_config[:uptime] = Time.now
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parsed_config
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end
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def self.load_pools_from_redis(redis)
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pools = []
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redis.smembers('vmpooler__pools').each do |pool|
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pool_hash = {}
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redis.hgetall("vmpooler__pool__#{pool}").each do |k, v|
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pool_hash[k] = v
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end
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pool_hash['alias'] = pool_hash['alias'].split(',')
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pools << pool_hash
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end
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pools
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end
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def self.redis_connection_pool(host, port, password, size, timeout, metrics)
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Vmpooler::PoolManager::GenericConnectionPool.new(
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metrics: metrics,
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metric_prefix: 'redis_connection_pool',
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size: size,
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timeout: timeout
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) do
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connection = Concurrent::Hash.new
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redis = new_redis(host, port, password)
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connection['connection'] = redis
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end
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end
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def self.new_redis(host = 'localhost', port = nil, password = nil)
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Redis.new(host: host, port: port, password: password)
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end
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def self.new_logger(logfile)
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Vmpooler::Logger.new logfile
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end
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def self.new_metrics(params)
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if params[:statsd]
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Vmpooler::Statsd.new(params[:statsd])
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elsif params[:graphite]
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Vmpooler::Graphite.new(params[:graphite])
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else
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Vmpooler::DummyStatsd.new
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end
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end
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def self.pools(conf)
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conf[:pools]
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end
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def self.pool_index(pools)
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pools_hash = {}
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index = 0
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pools.each do |pool|
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pools_hash[pool['name']] = index
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index += 1
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end
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pools_hash
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end
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def self.string_to_int(s)
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# Returns a integer if input is a string
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return if s.nil?
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return unless s =~ /\d/
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Integer(s)
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end
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def self.true?(obj)
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obj.to_s.downcase == 'true'
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end
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def self.set_linked_clone(parsed_config) # rubocop:disable Naming/AccessorMethodName
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parsed_config[:config]['create_linked_clones'] = parsed_config[:config]['create_linked_clones'] || true
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parsed_config[:config]['create_linked_clones'] = ENV['CREATE_LINKED_CLONES'] if ENV['CREATE_LINKED_CLONES'] =~ /true|false/
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parsed_config[:config]['create_linked_clones'] = true?(parsed_config[:config]['create_linked_clones']) if parsed_config[:config]['create_linked_clones']
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end
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end
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