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Auto-expire Redis metadata key via Redis EXPIRE

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This commit also removed the unnecessary Vmpooler::Janitor lib
This commit is contained in:
Scott Schneider 2015-04-07 10:26:55 -07:00
parent 2b9f66b8d2
commit f9de28236b
5 changed files with 19 additions and 127 deletions
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2
lib/vmpooler.rb
View file

@ -11,7 +11,7 @@ module Vmpooler
require 'timeout'
require 'yaml'
%w( api graphite janitor logger pool_manager vsphere_helper ).each do |lib|
%w( api graphite logger pool_manager vsphere_helper ).each do |lib|
begin
require "vmpooler/#{lib}"
rescue LoadError

36
lib/vmpooler/janitor.rb
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@ -1,36 +0,0 @@
module Vmpooler
class Janitor
def initialize(logger, redis, data_ttl)
# Load logger library
$logger = logger
# Connect to Redis
$redis = redis
# TTL
$data_ttl = data_ttl
end
def execute!
loop do
find_stale_vms
sleep(600)
end
end
def find_stale_vms
$redis.keys('vmpooler__vm__*').each do |key|
data = $redis.hgetall(key)
if data['destroy']
lifetime = (Time.now - Time.parse(data['destroy'])) / 60 / 60
if lifetime > $data_ttl
$redis.del(key)
end
end
end
end
end
end

9
lib/vmpooler/pool_manager.rb
View file

@ -1,10 +1,8 @@
module Vmpooler
class PoolManager
def initialize(config, pools, logger, redis, graphite=nil)
def initialize(config, logger, redis, graphite=nil)
$config = config
$pools = pools
# Load logger library
$logger = logger
@ -257,6 +255,9 @@ module Vmpooler
$redis.hdel('vmpooler__active__' + pool, vm)
$redis.hset('vmpooler__vm__' + vm, 'destroy', Time.now)
# Auto-expire metadata key
$redis.expire('vmpooler__vm__' + vm, ($config[:redis]['data_ttl'].to_i * 60 * 60))
host = $vsphere[pool].find_vm(vm) ||
$vsphere[pool].find_vm_heavy(vm)[vm]
@ -451,7 +452,7 @@ module Vmpooler
$redis.set('vmpooler__tasks__clone', 0)
loop do
$pools.each do |pool|
$config[:pools].each do |pool|
if ! $threads[pool['name']]
check_pool(pool)
else

71
spec/vmpooler/janitor_spec.rb
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@ -1,71 +0,0 @@
require 'spec_helper'
describe 'Janitor' do
let(:logger) { double('logger') }
let(:redis) { double('redis') }
let(:data_ttl) { 3 } # number of hours to retain
let(:old_destroy) { '2015-01-30 11:24:30 -0700' }
let(:fut_destroy) { '3015-01-30 11:24:30 -0700' }
subject { Vmpooler::Janitor.new(logger, redis, data_ttl) }
before do
allow(redis).to receive(:hgetall).with('key1').and_return({'destroy' => old_destroy})
allow(redis).to receive(:hgetall).with('key2').and_return({'destroy' => old_destroy})
allow(redis).to receive(:hgetall).with('key3').and_return({'destroy' => Time.now.to_s})
allow(redis).to receive(:hgetall).with('key4').and_return({'destroy' => Time.now.to_s})
allow(redis).to receive(:hgetall).with('key5').and_return({'destroy' => fut_destroy})
allow(redis).to receive(:del)
end
describe '#find_stale_vms' do
context 'has stale vms' do
it 'has one key' do
allow(redis).to receive(:keys) {['key1']}
expect(redis).to receive(:del).with('key1').once
expect(redis).to receive(:hgetall).with('key1').once
expect(redis).not_to receive(:hgetall).with('key2')
subject.find_stale_vms
end
it 'has two keys' do
allow(redis).to receive(:keys) {(%w(key1 key2))}
expect(redis).to receive(:hgetall).twice
expect(redis).to receive(:del).with('key1')
expect(redis).to receive(:del).with('key2')
subject.find_stale_vms
end
it 'has 5 keys and 2 stales' do
allow(redis).to receive(:keys) {(%w(key1 key2 key3 key4 key5))}
expect(redis).to receive(:hgetall).exactly(5).times
expect(redis).to receive(:del).with('key1')
expect(redis).to receive(:del).with('key2')
expect(redis).not_to receive(:del).with('key3')
expect(redis).not_to receive(:del).with('key4')
expect(redis).not_to receive(:del).with('key5')
subject.find_stale_vms
end
end
it 'does not have stale vms' do
allow(redis).to receive(:keys).and_return(['key1'])
allow(redis).to receive(:hgetall).with('key1') {{'destroy' => Time.now.to_s}}
allow(redis).to receive(:del).with('key1')
expect(redis).not_to receive(:del).with('key1')
subject.find_stale_vms
end
end
end

28
vmpooler
View file

@ -7,25 +7,23 @@ require 'lib/vmpooler'
config = Vmpooler.config
redis_host = config[:redis]['server']
redis_ttl = config[:redis]['data_ttl']
logger_file = config[:config]['logfile']
graphite = config[:graphite]['server'] ? config[:graphite]['server'] : nil
api = Thread.new {
thr = Vmpooler::API.new
thr.helpers.configure(config, Vmpooler.new_redis(redis_host))
thr.helpers.execute!
}
janitor = Thread.new {
Vmpooler::Janitor.new(Vmpooler.new_logger(logger_file), Vmpooler.new_redis(redis_host), redis_ttl).execute!
}
thr = Vmpooler::API.new
thr.helpers.configure(config, Vmpooler.new_redis(redis_host))
thr.helpers.execute!
}
manager = Thread.new {
Vmpooler::PoolManager.new(config,
config[:pools],
Vmpooler.new_logger(logger_file),
Vmpooler.new_redis(redis_host),
Vmpooler.new_graphite(graphite)).execute!
}
Vmpooler::PoolManager.new(
config,
Vmpooler.new_logger(logger_file),
Vmpooler.new_redis(redis_host),
Vmpooler.new_graphite(graphite)
).execute!
}
[api, janitor, manager].each { |t| t.join }
[api, manager].each { |t| t.join }