mirror of
https://github.com/puppetlabs/vmpooler.git
synced 2026-01-27 10:28:41 -05:00
(POOLER-50) Remove VM migration code
The migrate_vm code introduced in commit 705e5d26d8 caused errors
and has since been found to be problematic. This commit removes the changes
introduced as part of PR 167 that peratin to the migrate_vm code.
This commit is contained in:
Glenn Sarti
parent
850919f5db
commit
ddbc8f5046
6 changed files with 2 additions and 505 deletions
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@ -1461,216 +1461,6 @@ EOT
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end
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end
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describe '#migration_limit' do
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# This is a little confusing. Is this supposed to return a boolean
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# or integer type?
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[false,0].each do |testvalue|
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it "should return false for an input of #{testvalue}" do
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expect(subject.migration_limit(testvalue)).to eq(false)
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end
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end
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[1,32768].each do |testvalue|
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it "should return #{testvalue} for an input of #{testvalue}" do
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expect(subject.migration_limit(testvalue)).to eq(testvalue)
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end
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end
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[-1,-32768].each do |testvalue|
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it "should return nil for an input of #{testvalue}" do
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expect(subject.migration_limit(testvalue)).to be_nil
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end
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end
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end
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describe '#migrate_vm' do
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let(:vsphere) { double('vsphere') }
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before do
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expect(subject).not_to be_nil
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end
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it 'calls _migrate_vm' do
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expect(Thread).to receive(:new).and_yield
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expect(subject).to receive(:_migrate_vm).with(vm, pool, vsphere)
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subject.migrate_vm(vm, pool, vsphere)
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end
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end
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describe "#_migrate_vm" do
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let(:vsphere) { double('vsphere') }
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let(:vm_parent_hostname) { 'parent1' }
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let(:config) {
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YAML.load(<<-EOT
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---
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:config:
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migration_limit: 5
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:pools:
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- name: #{pool}
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EOT
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)
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}
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before do
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expect(subject).not_to be_nil
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end
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context 'when an error occurs' do
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it 'should log an error message and attempt to remove from vmpooler_migration queue' do
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expect(vsphere).to receive(:find_vm).with(vm).and_raise(RuntimeError,'MockError')
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expect(logger).to receive(:log).with('s', "[x] [#{pool}] '#{vm}' migration failed with an error: MockError")
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expect(subject).to receive(:remove_vmpooler_migration_vm)
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subject._migrate_vm(vm, pool, vsphere)
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end
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end
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context 'when VM does not exist' do
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it 'should log an error message when VM does not exist' do
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expect(vsphere).to receive(:find_vm).with(vm).and_return(nil)
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# This test is quite fragile. Should refactor the code to make this scenario easier to detect
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expect(logger).to receive(:log).with('s', "[x] [#{pool}] '#{vm}' migration failed with an error: undefined method `summary' for nil:NilClass")
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subject._migrate_vm(vm, pool, vsphere)
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end
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end
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context 'when VM exists but migration is disabled' do
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before(:each) do
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expect(vsphere).to receive(:find_vm).with(vm).and_return(host)
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allow(subject).to receive(:get_vm_host_info).with(host).and_return([{'name' => vm_parent_hostname}, vm_parent_hostname])
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create_migrating_vm(vm, pool)
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end
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[-1,-32768,false,0].each do |testvalue|
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it "should not migrate a VM if the migration limit is #{testvalue}" do
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config[:config]['migration_limit'] = testvalue
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expect(logger).to receive(:log).with('s', "[ ] [#{pool}] '#{vm}' is running on #{vm_parent_hostname}")
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subject._migrate_vm(vm, pool, vsphere)
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end
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it "should remove the VM from vmpooler__migrating queue in redis if the migration limit is #{testvalue}" do
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redis.sadd("vmpooler__migrating__#{pool}", vm)
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config[:config]['migration_limit'] = testvalue
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expect(redis.sismember("vmpooler__migrating__#{pool}",vm)).to be_truthy
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subject._migrate_vm(vm, pool, vsphere)
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expect(redis.sismember("vmpooler__migrating__#{pool}",vm)).to be_falsey
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end
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end
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end
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context 'when VM exists but migration limit is reached' do
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before(:each) do
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expect(vsphere).to receive(:find_vm).with(vm).and_return(host)
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allow(subject).to receive(:get_vm_host_info).with(host).and_return([{'name' => vm_parent_hostname}, vm_parent_hostname])
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create_migrating_vm(vm, pool)
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redis.sadd('vmpooler__migration', 'fakevm1')
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redis.sadd('vmpooler__migration', 'fakevm2')
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redis.sadd('vmpooler__migration', 'fakevm3')
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redis.sadd('vmpooler__migration', 'fakevm4')
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redis.sadd('vmpooler__migration', 'fakevm5')
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end
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it "should not migrate a VM if the migration limit is reached" do
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expect(logger).to receive(:log).with('s',"[ ] [#{pool}] '#{vm}' is running on #{vm_parent_hostname}. No migration will be evaluated since the migration_limit has been reached")
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subject._migrate_vm(vm, pool, vsphere)
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end
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it "should remove the VM from vmpooler__migrating queue in redis if the migration limit is reached" do
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expect(redis.sismember("vmpooler__migrating__#{pool}",vm)).to be_truthy
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subject._migrate_vm(vm, pool, vsphere)
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expect(redis.sismember("vmpooler__migrating__#{pool}",vm)).to be_falsey
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end
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end
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context 'when VM exists but migration limit is not yet reached' do
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before(:each) do
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expect(vsphere).to receive(:find_vm).with(vm).and_return(host)
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allow(subject).to receive(:get_vm_host_info).with(host).and_return([{'name' => vm_parent_hostname}, vm_parent_hostname])
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create_migrating_vm(vm, pool)
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redis.sadd('vmpooler__migration', 'fakevm1')
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redis.sadd('vmpooler__migration', 'fakevm2')
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end
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context 'and host to migrate to is the same as the current host' do
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before(:each) do
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expect(vsphere).to receive(:find_least_used_compatible_host).with(host).and_return([{'name' => vm_parent_hostname}, vm_parent_hostname])
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end
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it "should not migrate the VM" do
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expect(logger).to receive(:log).with('s', "[ ] [#{pool}] No migration required for '#{vm}' running on #{vm_parent_hostname}")
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subject._migrate_vm(vm, pool, vsphere)
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end
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it "should remove the VM from vmpooler__migrating queue in redis" do
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expect(redis.sismember("vmpooler__migrating__#{pool}",vm)).to be_truthy
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subject._migrate_vm(vm, pool, vsphere)
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expect(redis.sismember("vmpooler__migrating__#{pool}",vm)).to be_falsey
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end
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it "should not change the vmpooler_migration queue count" do
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before_count = redis.scard('vmpooler__migration')
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subject._migrate_vm(vm, pool, vsphere)
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expect(redis.scard('vmpooler__migration')).to eq(before_count)
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end
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it "should call remove_vmpooler_migration_vm" do
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expect(subject).to receive(:remove_vmpooler_migration_vm)
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subject._migrate_vm(vm, pool, vsphere)
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end
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end
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context 'and host to migrate to different to the current host' do
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let(:vm_new_hostname) { 'new_hostname' }
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before(:each) do
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expect(vsphere).to receive(:find_least_used_compatible_host).with(host).and_return([{'name' => vm_new_hostname}, vm_new_hostname])
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expect(subject).to receive(:migrate_vm_and_record_timing).with(host, vm, pool, Object, vm_parent_hostname, vm_new_hostname, vsphere).and_return('1.00')
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end
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it "should migrate the VM" do
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expect(logger).to receive(:log).with('s', "[>] [#{pool}] '#{vm}' migrated from #{vm_parent_hostname} to #{vm_new_hostname} in 1.00 seconds")
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subject._migrate_vm(vm, pool, vsphere)
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end
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it "should remove the VM from vmpooler__migrating queue in redis" do
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expect(redis.sismember("vmpooler__migrating__#{pool}",vm)).to be_truthy
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subject._migrate_vm(vm, pool, vsphere)
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expect(redis.sismember("vmpooler__migrating__#{pool}",vm)).to be_falsey
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end
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it "should not change the vmpooler_migration queue count" do
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before_count = redis.scard('vmpooler__migration')
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subject._migrate_vm(vm, pool, vsphere)
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expect(redis.scard('vmpooler__migration')).to eq(before_count)
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end
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it "should call remove_vmpooler_migration_vm" do
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expect(subject).to receive(:remove_vmpooler_migration_vm)
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subject._migrate_vm(vm, pool, vsphere)
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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_host_info" do
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before do
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expect(subject).not_to be_nil
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end
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let(:vm_object) { double('vm_object') }
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let(:parent_host) { double('parent_host') }
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it 'should return an array with host information' do
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expect(vm_object).to receive_message_chain(:summary, :runtime, :host).and_return(parent_host)
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expect(parent_host).to receive(:name).and_return('vmhostname')
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expect(subject.get_vm_host_info(vm_object)).to eq([parent_host,'vmhostname'])
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end
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end
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describe "#execute!" do
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let(:threads) {{}}
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@ -1703,12 +1493,6 @@ EOT
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expect(redis.get('vmpooler__tasks__clone')).to eq('0')
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end
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it 'should clear migration tasks' do
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redis.set('vmpooler__migration', 1)
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subject.execute!(1,0)
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expect(redis.get('vmpooler__migration')).to be_nil
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end
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it 'should run the check_disk_queue method' do
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expect(subject).to receive(:check_disk_queue)
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@ -1965,69 +1749,6 @@ EOT
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end
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end
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describe '#remove_vmpooler_migration_vm' do
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before do
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expect(subject).not_to be_nil
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end
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it 'should remove the migration from redis' do
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redis.sadd('vmpooler__migration', vm)
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expect(redis.sismember('vmpooler__migration',vm)).to be(true)
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subject.remove_vmpooler_migration_vm(pool, vm)
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expect(redis.sismember('vmpooler__migration',vm)).to be(false)
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end
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it 'should log a message and swallow an error if one occurs' do
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expect(redis).to receive(:srem).and_raise(RuntimeError,'MockError')
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expect(logger).to receive(:log).with('s', "[x] [#{pool}] '#{vm}' removal from vmpooler__migration failed with an error: MockError")
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subject.remove_vmpooler_migration_vm(pool, vm)
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end
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end
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describe '#migrate_vm_and_record_timing' do
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let(:vsphere) { double('vsphere') }
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let(:vm_object) { double('vm_object') }
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let(:source_host_name) { 'source_host' }
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let(:dest_host_name) { 'dest_host' }
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before do
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expect(subject).not_to be_nil
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end
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before(:each) do
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create_vm(vm,token)
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expect(vsphere).to receive(:migrate_vm_host).with(vm_object, host)
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end
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it 'should return the elapsed time for the migration' do
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result = subject.migrate_vm_and_record_timing(vm_object, vm, pool, host, source_host_name, dest_host_name, vsphere)
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expect(result).to match(/0\.[\d]+/)
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end
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it 'should add timing metric' do
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expect(metrics).to receive(:timing).with("migrate.#{pool}",String)
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subject.migrate_vm_and_record_timing(vm_object, vm, pool, host, source_host_name, dest_host_name, vsphere)
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end
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it 'should increment from_host and to_host metric' do
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expect(metrics).to receive(:increment).with("migrate_from.#{source_host_name}")
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expect(metrics).to receive(:increment).with("migrate_to.#{dest_host_name}")
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subject.migrate_vm_and_record_timing(vm_object, vm, pool, host, source_host_name, dest_host_name, vsphere)
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end
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it 'should set migration_time metric in redis' do
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expect(redis.hget("vmpooler__vm__#{vm}", 'migration_time')).to be_nil
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subject.migrate_vm_and_record_timing(vm_object, vm, pool, host, source_host_name, dest_host_name, vsphere)
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expect(redis.hget("vmpooler__vm__#{vm}", 'migration_time')).to match(/0\.[\d]+/)
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end
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it 'should set checkout_to_migration metric in redis' do
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expect(redis.hget("vmpooler__vm__#{vm}", 'checkout_to_migration')).to be_nil
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subject.migrate_vm_and_record_timing(vm_object, vm, pool, host, source_host_name, dest_host_name, vsphere)
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expect(redis.hget("vmpooler__vm__#{vm}", 'checkout_to_migration')).to match(/0\.[\d]+/)
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end
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end
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describe '#_check_pool' do
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# Default test fixtures will consist of;
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# - Empty Redis dataset
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@ -2057,7 +1778,6 @@ EOT
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# INVENTORY
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context 'Conducting inventory' do
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before(:each) do
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allow(subject).to receive(:migrate_vm)
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allow(subject).to receive(:check_running_vm)
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allow(subject).to receive(:check_ready_vm)
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allow(subject).to receive(:check_pending_vm)
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@ -2092,7 +1812,7 @@ EOT
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expect(redis.sismember("vmpooler__completed__#{pool}", new_vm)).to be(true)
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end
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['running','ready','pending','completed','discovered','migrating'].each do |queue_name|
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['running','ready','pending','completed','discovered'].each do |queue_name|
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it "should not discover VMs in the #{queue_name} queue" do
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expect(vsphere).to receive(:find_folder).and_return(MockFindFolder.new([new_vm]))
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@ -2356,7 +2076,6 @@ EOT
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['pending','ready','running','completed'].each do |queue_name|
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context "exists in the #{queue_name} queue" do
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before(:each) do
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allow(subject).to receive(:migrate_vm)
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allow(subject).to receive(:check_running_vm)
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allow(subject).to receive(:check_ready_vm)
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allow(subject).to receive(:check_pending_vm)
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@ -2392,43 +2111,6 @@ EOT
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end
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end
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# MIGRATIONS
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context 'Migrating VM not in the inventory' do
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before(:each) do
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expect(vsphere).to receive(:find_folder).and_return(MockFindFolder.new([new_vm]))
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expect(logger).to receive(:log).with('s', "[?] [#{pool}] '#{new_vm}' added to 'discovered' queue")
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create_migrating_vm(vm,pool)
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end
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it 'should not do anything' do
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expect(subject).to receive(:migrate_vm).exactly(0).times
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subject._check_pool(pool_object,vsphere)
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end
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end
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context 'Migrating VM in the inventory' do
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before(:each) do
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expect(vsphere).to receive(:find_folder).and_return(MockFindFolder.new([vm]))
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allow(subject).to receive(:check_ready_vm)
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allow(logger).to receive(:log).with("s", "[!] [#{pool}] is empty")
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create_migrating_vm(vm,pool)
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end
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it 'should log an error if one occurs' do
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expect(subject).to receive(:migrate_vm).and_raise(RuntimeError,'MockError')
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expect(logger).to receive(:log).with('s', "[x] [#{pool}] '#{vm}' failed to migrate: MockError")
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subject._check_pool(pool_object,vsphere)
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end
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it 'should call migrate_vm' do
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expect(subject).to receive(:migrate_vm).with(vm,pool,vsphere)
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subject._check_pool(pool_object,vsphere)
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end
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end
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# REPOPULATE
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context 'Repopulate a pool' do
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it 'should not call clone_vm when number of VMs is equal to the pool size' do
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@ -2458,7 +2140,7 @@ EOT
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end
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end
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['running','completed','discovered','migrating'].each do |queue_name|
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['running','completed','discovered'].each do |queue_name|
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it "should not use VMs in #{queue_name} queue to caculate pool size" do
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expect(vsphere).to receive(:find_folder).and_return(MockFindFolder.new([vm]))
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expect(subject).to receive(:clone_vm)
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