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(QENG-3919) spike for implementation of all-or-nothing checkout

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This commit is contained in:
Rick Bradley 2016-05-20 13:12:44 -05:00
parent b59a1f8886
commit e323a7fb58
1 changed files with 68 additions and 48 deletions
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86
lib/vmpooler/api/v1.rb
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@ -45,10 +45,15 @@ module Vmpooler
newhash
end
def checkout_vm(template, result)
vm = backend.spop('vmpooler__ready__' + template)
def fetch_single_vm(template)
backend.spop('vmpooler__ready__' + template)
end
unless vm.nil?
def return_single_vm(template, vm)
backend.spush('vmpooler__ready__' + template, vm)
end
def account_for_starting_vm(template, vm)
backend.sadd('vmpooler__running__' + template, vm)
backend.hset('vmpooler__active__' + template, vm, Time.now)
backend.hset('vmpooler__vm__' + vm, 'checkout', Time.now)
@ -65,15 +70,14 @@ module Vmpooler
backend.hset('vmpooler__vm__' + vm, 'lifetime', config['vm_lifetime_auth'].to_i)
end
end
result[template] ||= {}
if result[template]['hostname']
result[template]['hostname'] = [result[template]['hostname']] unless result[template]['hostname'].is_a?(Array)
result[template]['hostname'].push(vm)
else
result[template]['hostname'] = vm
end
def checkout_vm(template, result)
vm = fetch_single_vm(template)
unless vm.nil?
account_for_starting_vm(template, vm)
update_result_hosts(result, template, vm)
else
status 503
result['ok'] = false
@ -335,40 +339,56 @@ module Vmpooler
post "#{api_prefix}/vm/?" do
content_type :json
result = { 'ok' => false }
jdata = alias_deref(JSON.parse(request.body.read))
if not jdata.nil? and not jdata.empty?
available = 1
failed = false
vms = []
jdata.each do |template, count|
val.to_i.times do |_i|
vm = fetch_single_vm(template)
if !vm
failed = true
break
else
vms << [ template, vm ]
end
end
end
if failed
vms.each do |(template, vm)|
return_single_vm(template, vm)
end
else
vms.each do |(template, vm)|
account_for_starting_vm(template, vm)
update_result_hosts(results, template, vm)
end
result['ok'] = true
result['domain'] = config['domain'] if config['domain']
end
else
status 404
end
jdata.each do |key, val|
if backend.scard('vmpooler__ready__' + key).to_i < val.to_i
available = 0
end
end
if (available == 1)
result['ok'] = true
jdata.each do |key, val|
val.to_i.times do |_i|
result = checkout_vm(key, result)
end
end
end
if result['ok'] && config['domain']
result['domain'] = config['domain']
end
JSON.pretty_generate(result)
end
def update_result_hosts(result, template, vm)
result[template] ||= {}
if result[template]['hostname']
result[template]['hostname'] = Array(result[template]['hostname'])
result[template]['hostname'].push(vm)
else
result[template]['hostname'] = vm
end
end
post "#{api_prefix}/vm/:template/?" do
content_type :json