StartVM and TerminateVM Main Flow of Cloud Drivers

StartVM()/TerminateVM() retry timeout 조정 이력

[Init]

• StartVM: 30s
• TerminateVM: 10s
• issues:
  • Alibaba TerminateVM 시 오류 발생
  • OpenStack StartVM 시 오류 발생

[2021.05.21.]

• StartVM: 120s
• TerminateVM: 60s

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[StartVM main flow]

• Focusing on CallLog and Waiting Loop
• Waiting Loop: VM 정보 제공을 위해서 VM 정보가 생성될 때까지(=running status) 기다리는 작업
  • StartVM 규격 참고: StartVM(vmReqInfo VMReqInfo) (VMInfo, error)
• Flow에서 함수 이름은 실제 이름과 다를 수 있음
  • SetUser('cb-user'): cloud-init 데이터 설정
  • CreateUser('cb-user'): runSSH into VM

Driver Names	StartVM Flow	Etc
ALIBABA	GetKey() SetUser('cb-user') StartTime   RunInstances() EndTime   Loop-120sec(getStatus('Running'): sleep 1s) return GetVMInfo()
AWS	GetKey() SetUser('cb-user') StartTime   RunInstances() EndTime   WaitUntilInstanceRunning() return GetVMInfo()
AZURE	CheckVM() CreatePublicIP() CreateVNic() GetPublicKey() StartTime   CreateOrUpdate() EndTime   WaitForCompletionRef() return GetVMInfo()
CLOUDIT	StartTime   Rest.Post(ACE, servers) EndTime   Loop-120sec(get(PrivateIP && Running): sleep 1s)   Loop-120sec(echo: sleep 1) CreateUser('cb-user') Restart(sshd) return GetVMInfo()
GCP	GetKey() StartTime   Instances.Insert.Do() EndTime   Loop-120sec(getStatus('Running'): sleep 1s) return GetVMInfo()
OPENSTACK	CheckVM() setUser('cb-user') StartTime   servers.Create() EndTime   Loop-120sec(getStatus('active'): sleep 1s)   AssociatePublicIP() return GetVMInfo()

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[TerminateVM main flow]

• Focusing on CallLog and Waiting Loop
• Waiting Loop: VM이 원하는 상태로 될 때까지 기다리는 작업
  • TerminateVM 규격 참고: TerminateVM(vmIID IID) (VMStatus, error)
• Flow에서 함수 이름은 실제 이름과 다를 수 있음

Driver Names	TerminateVM Flow	Etc
ALIBABA	SuspendVM()   Loop-60sec(getStatus('Suspended'): sleep 1s) Starttime   DeleteInstance() EndTime return 'Terminating'
AWS	StartTime   TerminateInstances() EndTime return 'Terminating'
AZURE	GetVM() StartTime   Delete() EndTime   WaitForCompletionRef() DeleteVNic() DeletePublicIP() DeleteVMDisk() return irs.NotExist
CLOUDIT	GetVM() DisassociatePublicIP() sleep 5s StartTime   Terminate() EndTime return irs.Terminating
GCP	StartTime   Delete() EndTime return 'Terminating'
OPENSTACK	GetVM() floatingip.Delete() StartTime   Delete() EndTime return irs.Terminating