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(POOLER-72) Add Dummy Provider
Previously the only VM Provider was vSphere however this made testing and making changes difficult as it required a functioning vSphere instance. This commit adds a Dummy Provider which presents a VM provider to Pool Manager but manages provisioned "VM"s in a hashtable. The Dummy Provider can also be configured to randomly fail operations and take random amounts of time to perform operations, such as cloning a VM, which is useful to see how the Pool Manager copes with these events. This commit also updates the configuration YAML documentation and adds appropriate unit tests.
This commit is contained in:
Glenn Sarti
parent
d9d45109f2
commit
77afc86aeb
4 changed files with 962 additions and 1 deletions
509
spec/unit/providers/dummy_spec.rb
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509
spec/unit/providers/dummy_spec.rb
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require 'spec_helper'
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describe 'Vmpooler::PoolManager::Provider::Dummy' do
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let(:logger) { MockLogger.new }
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let(:metrics) { Vmpooler::DummyStatsd.new }
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let(:pool_name) { 'pool1' }
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let(:other_pool_name) { 'pool2' }
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let(:vm_name) { 'vm1' }
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let(:running_vm_name) { 'vm2' }
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let(:notready_vm_name) { 'vm3' }
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let (:provider_options) {
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# Construct an initial state for testing
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dummylist = {}
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dummylist['pool'] = {}
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# pool1 is a pool of "normal" VMs
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dummylist['pool'][pool_name] = []
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# A normal running VM
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vm = {}
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vm['name'] = vm_name
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vm['hostname'] = vm_name
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vm['domain'] = 'dummy.local'
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vm['vm_template'] = 'template1'
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vm['template'] = pool_name
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vm['poolname'] = pool_name
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vm['ready'] = true
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vm['boottime'] = Time.now
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vm['powerstate'] = 'PoweredOn'
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vm['vm_host'] = 'HOST1'
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vm['snapshots'] = []
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vm['disks'] = []
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vm['dummy_state'] = 'RUNNING'
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dummylist['pool'][pool_name] << vm
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# pool2 is a pool of "abnormal" VMs e.g. PoweredOff etc.
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dummylist['pool'][other_pool_name] = []
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# A freshly provisioned VM that is not ready
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vm = {}
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vm['name'] = running_vm_name
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vm['hostname'] = running_vm_name
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vm['domain'] = 'dummy.local'
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vm['vm_template'] = 'template1'
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vm['template'] = other_pool_name
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vm['poolname'] = other_pool_name
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vm['ready'] = false
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vm['boottime'] = Time.now
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vm['powerstate'] = 'PoweredOn'
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vm['vm_host'] = 'HOST1'
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vm['snapshots'] = []
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vm['disks'] = []
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vm['dummy_state'] = 'UNKNOWN'
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dummylist['pool'][other_pool_name] << vm
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# A freshly provisioned VM that is running but not ready
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vm = {}
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vm['name'] = notready_vm_name
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vm['hostname'] = notready_vm_name
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vm['domain'] = 'dummy.local'
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vm['vm_template'] = 'template1'
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vm['template'] = other_pool_name
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vm['poolname'] = other_pool_name
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vm['ready'] = false
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vm['boottime'] = Time.now
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vm['powerstate'] = 'PoweredOn'
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vm['vm_host'] = 'HOST1'
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vm['snapshots'] = []
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vm['disks'] = []
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vm['dummy_state'] = 'RUNNING'
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dummylist['pool'][other_pool_name] << vm
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{
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'initial_state' => dummylist
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}
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}
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let(:config) { YAML.load(<<-EOT
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---
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:config:
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max_tries: 3
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retry_factor: 10
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:providers:
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:dummy:
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key1: 'value1'
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:pools:
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- name: '#{pool_name}'
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size: 5
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- name: 'pool2'
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size: 5
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EOT
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)
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}
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subject { Vmpooler::PoolManager::Provider::Dummy.new(config, logger, metrics, 'dummy', provider_options) }
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describe '#name' do
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it 'should be dummy' do
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expect(subject.name).to eq('dummy')
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end
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end
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describe '#vms_in_pool' do
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it 'should return [] when pool does not exist' do
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vm_list = subject.vms_in_pool('missing_pool')
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expect(vm_list).to eq([])
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end
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it 'should return an array of VMs when pool exists' do
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vm_list = subject.vms_in_pool(pool_name)
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expect(vm_list.count).to eq(1)
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end
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end
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describe '#get_vm_host' do
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it 'should return the hostname when VM exists' do
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expect(subject.get_vm_host(pool_name, vm_name)).to eq('HOST1')
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end
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it 'should error when VM does not exist' do
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expect{subject.get_vm_host(pool_name, 'doesnotexist')}.to raise_error(RuntimeError)
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end
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end
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describe '#find_least_used_compatible_host' do
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it 'should return the current host' do
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new_host = subject.find_least_used_compatible_host(pool_name, vm_name)
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expect(new_host).to eq('HOST1')
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end
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context 'using migratevm_couldmove_percent' do
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describe 'of zero' do
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before(:each) do
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config[:providers][:dummy]['migratevm_couldmove_percent'] = 0
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end
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it 'should return the current host' do
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new_host = subject.find_least_used_compatible_host(pool_name, vm_name)
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expect(new_host).to eq('HOST1')
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end
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end
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describe 'of 100' do
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before(:each) do
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config[:providers][:dummy]['migratevm_couldmove_percent'] = 100
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end
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it 'should return a different host' do
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new_host = subject.find_least_used_compatible_host(pool_name, vm_name)
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expect(new_host).to_not eq('HOST1')
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end
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end
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end
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end
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describe '#migrate_vm_to_host' do
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it 'should move to the new host' do
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expect(subject.migrate_vm_to_host(pool_name, 'vm1','NEWHOST')).to eq(true)
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expect(subject.get_vm_host(pool_name, 'vm1')).to eq('NEWHOST')
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end
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context 'using migratevm_fail_percent' do
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describe 'of zero' do
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before(:each) do
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config[:providers][:dummy]['migratevm_fail_percent'] = 0
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end
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it 'should move to the new host' do
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expect(subject.migrate_vm_to_host(pool_name, 'vm1','NEWHOST')).to eq(true)
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expect(subject.get_vm_host(pool_name, 'vm1')).to eq('NEWHOST')
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end
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end
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describe 'of 100' do
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before(:each) do
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config[:providers][:dummy]['migratevm_fail_percent'] = 100
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end
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it 'should raise an error' do
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expect{subject.migrate_vm_to_host(pool_name, 'vm1','NEWHOST')}.to raise_error(/migratevm_fail_percent/)
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end
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end
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end
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end
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describe '#get_vm' do
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it 'should return the VM when VM exists' do
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vm = subject.get_vm(pool_name, vm_name)
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expect(vm['name']).to eq(vm_name)
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expect(vm['powerstate']).to eq('PoweredOn')
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expect(vm['hostname']).to eq(vm['name'])
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end
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it 'should return nil when VM does not exist' do
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expect(subject.get_vm(pool_name, 'doesnotexist')).to eq(nil)
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end
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context 'using getvm_poweroff_percent' do
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describe 'of zero' do
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before(:each) do
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config[:providers][:dummy]['getvm_poweroff_percent'] = 0
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end
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it 'will not power off a VM' do
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vm = subject.get_vm(pool_name, vm_name)
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expect(vm['name']).to eq(vm_name)
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expect(vm['powerstate']).to eq('PoweredOn')
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end
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end
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describe 'of 100' do
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before(:each) do
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config[:providers][:dummy]['getvm_poweroff_percent'] = 100
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end
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it 'will power off a VM' do
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vm = subject.get_vm(pool_name, vm_name)
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expect(vm['name']).to eq(vm_name)
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expect(vm['powerstate']).to eq('PoweredOff')
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end
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end
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end
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context 'using getvm_rename_percent' do
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describe 'of zero' do
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before(:each) do
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config[:providers][:dummy]['getvm_rename_percent'] = 0
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end
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it 'will not rename a VM' do
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vm = subject.get_vm(pool_name, vm_name)
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expect(vm['name']).to eq(vm_name)
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expect(vm['hostname']).to eq(vm['name'])
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end
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end
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describe 'of 100' do
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before(:each) do
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config[:providers][:dummy]['getvm_rename_percent'] = 100
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end
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it 'will rename a VM' do
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vm = subject.get_vm(pool_name, vm_name)
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expect(vm['name']).to eq(vm_name)
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expect(vm['hostname']).to_not eq(vm['name'])
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end
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end
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end
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end
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describe '#create_vm' do
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let(:new_vm_name) { 'newvm' }
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it 'should return a new VM' do
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expect(subject.create_vm(pool_name, new_vm_name)['name']).to eq(new_vm_name)
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end
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it 'should increase the number of VMs in the pool' do
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old_pool_count = subject.vms_in_pool(pool_name).count
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new_vm = subject.create_vm(pool_name, new_vm_name)
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expect(subject.vms_in_pool(pool_name).count).to eq(old_pool_count + 1)
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end
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context 'using createvm_fail_percent' do
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describe 'of zero' do
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before(:each) do
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config[:providers][:dummy]['createvm_fail_percent'] = 0
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end
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it 'should return a new VM' do
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expect(subject.create_vm(pool_name, new_vm_name)['name']).to eq(new_vm_name)
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end
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end
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describe 'of 100' do
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before(:each) do
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config[:providers][:dummy]['createvm_fail_percent'] = 100
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end
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it 'should raise an error' do
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expect{subject.create_vm(pool_name, new_vm_name)}.to raise_error(/createvm_fail_percent/)
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end
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it 'new VM should not exist' do
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begin
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subject.create_vm(pool_name, new_vm_name)
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rescue
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end
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expect(subject.get_vm(pool_name, new_vm_name)).to eq(nil)
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end
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end
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end
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end
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describe '#create_disk' do
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let(:disk_size) { 10 }
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it 'should return true when the disk is created' do
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expect(subject.create_disk(pool_name, vm_name,disk_size)).to be true
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end
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it 'should raise an error when VM does not exist' do
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expect{ subject.create_disk(pool_name, 'doesnotexist',disk_size) }.to raise_error(/VM doesnotexist does not exist/)
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end
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context 'using createdisk_fail_percent' do
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describe 'of zero' do
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before(:each) do
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config[:providers][:dummy]['createdisk_fail_percent'] = 0
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end
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it 'should return true when the disk is created' do
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expect(subject.create_disk(pool_name, vm_name,disk_size)).to be true
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end
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end
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describe 'of 100' do
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before(:each) do
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config[:providers][:dummy]['createdisk_fail_percent'] = 100
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end
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it 'should raise an error' do
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expect{subject.create_disk(pool_name, vm_name,disk_size)}.to raise_error(/createdisk_fail_percent/)
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end
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end
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end
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end
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describe '#create_snapshot' do
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let(:snapshot_name) { 'newsnapshot' }
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it 'should return true when the snapshot is created' do
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expect(subject.create_snapshot(pool_name, vm_name, snapshot_name)).to be true
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end
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it 'should raise an error when VM does not exist' do
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expect{ subject.create_snapshot(pool_name, 'doesnotexist', snapshot_name) }.to raise_error(/VM doesnotexist does not exist/)
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end
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context 'using createsnapshot_fail_percent' do
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describe 'of zero' do
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before(:each) do
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config[:providers][:dummy]['createsnapshot_fail_percent'] = 0
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end
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it 'should return true when the disk is created' do
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expect(subject.create_snapshot(pool_name, vm_name, snapshot_name)).to be true
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end
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end
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describe 'of 100' do
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before(:each) do
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config[:providers][:dummy]['createsnapshot_fail_percent'] = 100
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end
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it 'should raise an error' do
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expect{ subject.create_snapshot(pool_name, vm_name, snapshot_name) }.to raise_error(/createsnapshot_fail_percent/)
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end
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end
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end
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end
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describe '#revert_snapshot' do
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let(:snapshot_name) { 'newsnapshot' }
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before(:each) do
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# Create a snapshot
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subject.create_snapshot(pool_name, vm_name, snapshot_name)
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end
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it 'should return true when the snapshot is reverted' do
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expect(subject.revert_snapshot(pool_name, vm_name, snapshot_name)).to be true
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end
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it 'should raise an error when VM does not exist' do
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expect{ subject.revert_snapshot(pool_name, 'doesnotexist', snapshot_name) }.to raise_error(/VM doesnotexist does not exist/)
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end
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it 'should return false when the snapshot does not exist' do
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expect(subject.revert_snapshot(pool_name, vm_name, 'doesnotexist')).to be false
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end
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context 'using revertsnapshot_fail_percent' do
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describe 'of zero' do
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before(:each) do
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config[:providers][:dummy]['revertsnapshot_fail_percent'] = 0
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end
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it 'should return true when the snapshot is reverted' do
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expect(subject.revert_snapshot(pool_name, vm_name, snapshot_name)).to be true
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end
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end
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describe 'of 100' do
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before(:each) do
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config[:providers][:dummy]['revertsnapshot_fail_percent'] = 100
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end
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it 'should raise an error when VM does not exist' do
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expect{ subject.revert_snapshot(pool_name, vm_name, snapshot_name) }.to raise_error(/revertsnapshot_fail_percent/)
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end
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end
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end
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end
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describe '#destroy_vm' do
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it 'should return true when destroyed' do
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expect(subject.destroy_vm(pool_name, vm_name)).to eq(true)
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end
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it 'should log if the VM is powered off' do
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allow(logger).to receive(:log)
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expect(logger).to receive(:log).with('d', "[ ] [pool1] 'vm1' is being shut down")
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expect(subject.destroy_vm(pool_name, vm_name)).to eq(true)
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end
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it 'should return false if VM does not exist' do
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expect(subject.destroy_vm('doesnotexist',vm_name)).to eq(false)
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end
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it 'should return false if VM is not in the correct pool' do
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expect(subject.destroy_vm(other_pool_name, vm_name)).to eq(false)
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end
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context 'using destroyvm_fail_percent' do
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describe 'of zero' do
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before(:each) do
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config[:providers][:dummy]['destroyvm_fail_percent'] = 0
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end
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it 'should return true when destroyed' do
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expect(subject.destroy_vm(pool_name, vm_name)).to eq(true)
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end
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end
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describe 'of 100' do
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before(:each) do
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config[:providers][:dummy]['destroyvm_fail_percent'] = 100
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end
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it 'should raise an error' do
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expect{subject.destroy_vm(pool_name, vm_name)}.to raise_error(/migratevm_fail_percent/)
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end
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end
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end
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end
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describe '#vm_ready?' do
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before(:each) do
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# Speed up tests and ignore sleeping
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allow(subject).to receive(:sleep)
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end
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it 'should return true if ready' do
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expect(subject.vm_ready?(pool_name, vm_name)).to eq(true)
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end
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it 'should return false if VM does not exist' do
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expect(subject.vm_ready?(pool_name, 'doesnotexist')).to eq(false)
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end
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it 'should return false if VM is not in the correct pool' do
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expect(subject.vm_ready?(other_pool_name, vm_name)).to eq(false)
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end
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it 'should raise an error if timeout expires' do
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expect{subject.vm_ready?(other_pool_name, running_vm_name)}.to raise_error(Timeout::Error)
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end
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it 'should return true if VM becomes ready' do
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expect(subject.vm_ready?(other_pool_name, notready_vm_name)).to eq(true)
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end
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context 'using vmready_fail_percent' do
|
||||
describe 'of zero' do
|
||||
before(:each) do
|
||||
config[:providers][:dummy]['vmready_fail_percent'] = 0
|
||||
end
|
||||
|
||||
it 'should return true if VM becomes ready' do
|
||||
expect(subject.vm_ready?(other_pool_name, notready_vm_name)).to eq(true)
|
||||
end
|
||||
end
|
||||
|
||||
describe 'of 100' do
|
||||
before(:each) do
|
||||
config[:providers][:dummy]['vmready_fail_percent'] = 100
|
||||
end
|
||||
|
||||
it 'should raise an error' do
|
||||
expect{subject.vm_ready?(other_pool_name, notready_vm_name)}.to raise_error(/vmready_fail_percent/)
|
||||
end
|
||||
end
|
||||
end
|
||||
end
|
||||
|
||||
describe '#vm_exists?' do
|
||||
it 'should return true when VM exists' do
|
||||
expect(subject.vm_exists?(pool_name, vm_name)).to eq(true)
|
||||
end
|
||||
|
||||
it 'should return true when VM does not exist' do
|
||||
expect(subject.vm_exists?(pool_name, 'doesnotexist')).to eq(false)
|
||||
end
|
||||
end
|
||||
end
|
||||
Loading…
Add table
Add a link
Reference in a new issue