Besides huge success in mobile, ARM is also ambitious in server field. Software ecosystem is now a barrier for wide deployment of ARM servers in data center. ARM Shanghai Workloads team is working on clouding and big data software enablement and optimization on ARM64 platform. In this presentation, Yibo Cai will introduce the status and challenges of running OpenStack on ARM servers, with emphasis on OpenStack compute, storage and networking.

1. ©ARM 2017
OpenStack on AArch64
Yibo Cai
Beijing / LINUXCON CHINA
Staff Software Engineer
Jun / 19 / 2017

2. ©ARM 20172
Agenda
▪ OpenStack on AArch64
▪ Compute
▪ Networking
▪ Storage
▪ Deployment
▪ Upstream status
▪ Plan
▪ Demo

3. ©ARM 20173
ARM Server
OpenStack on AArch64
OpenStack
Compute Networking Storage
BaremetalVM Container Object Storage Block Storage
SDN

4. ©ARM 20174
OpenStack on AArch64

5. ©ARM 20175
Compute on AArch64
AArch64 BaremetalAArch64VM
AArch64 compute node
Kernel, KVM
QEMU
libvirt
Nova
libvirt driver
VM VM
AArch64 baremetal nodes
Nova
Ironic driver
Ironic
Baremetal Baremetal
▪ Supported Nova libvirt driver and Ironic on AArch64

6. ©ARM 20176
Networking on AArch64
▪ Supported Neutron drivers on AArch64
ML2 Plugin L3 Plugin
Type Drivers
FLAT
VLAN
GRE
VXLAN
Mechanism Drivers
OpenvSwtich
LinuxBridge
OpenDaylight
OpenvSwtich
OpenDaylight
OVS+DPDK
Other Services
DHCP,DNS
MetaData
Metering
…
Neutron API
OVS+DPDK

7. ©ARM 20177
Storage on AArch64
▪ Block storage: Ceph RBD as Cinder backend
▪ Object storage: Swift compatible RADOS gateway
OSDOSD
Ceph cluster
MonMon OSD
librados
radosgw librbd
Swift API QEMU
libvirt
OpenStack
CinderSwift

8. ©ARM 20178
OpenStack Deployment on AArch64
▪ Linaro Reference Architecture: + +
Nova, Neutron, Glance, Cinder,
Heat, Horizon, Ceph-Monitor
Openvswitch-agent, DHCP-agent,
Metadata-agent
Nova-compute, libvirt, QEMU,
Openvswtich-agent, Ceph-OSD
Nova-compute, libvirt, QEMU,
Openvswtich-agent, Ceph-OSD
Jump server
Control node
Network node
Compute node
Compute node
Reference
Architecture
AArch64 nodes
Tenant network
Control network
Public network
Leading collaboration in
ARM Ecosystem

9. ©ARM 20179
Living cloud on AArch64
▪ https://cn1.linaro.cloud

10. ©ARM 201710
Upstream status
▪ 50+ patches merged to support OpenStack on AArch64
▪ Nova, Ironic, Swift, Zun, Kolla, DevStack, Neutron, Magnum, Oslo, …
▪ Lessons learned
▪ Focus on the points
▪ Compute: libvirt on AArch64
▪ Networking: acceleration
▪ Storage: performance tuning
▪ Influence the community
▪ Server ≠ x86
▪ Build ARM server Ecosystem
Leading collaboration in
ARM Ecosystem

11. ©ARM 201711
Plan
▪ Containerize OpenStack on AArch64
▪ Compute: deep container integration through Zun
▪ Networking: flexible container networking through Kuryr
▪ Storage: provide Ceph storage for containers
▪ Deployment: Kolla Ansible and Kolla Kubernetes
▪ OpenStack CI on AArch64
▪ Concrete step toward official supporting OpenStack on AArch64

12. ©ARM 201712
Demo
▪ Spawn a baremetal instance on AArch64
▪ A non-trivial task requires cooperation from Nova, Neutron, Ironic,
Glance, Cinder, Horizon and Ceph.
▪ Demo environment
▪ Multi-node OpenStack cluster setup in one AArch64 host
▪ Four AArch64VMs forms the OpenStack cluster
▪ One control node, one network node, two compute nodes
▪ Use Ceph as image and block storage
▪ Use Nova + Ironic to deploy baremetal instance
▪ One pre-created AArch64VMs as baremetal node.

13. ©ARM 201713
Demo
Baremetal instance
Control node
Compute,
Storage node
Network node
Ironic
conductor
PXE, tftp
Compute,
Storage node
OpenStack Cluster
Launch instance
Schedule, networking
Power on instance
Boot through PXE
Download and dump
working image to disk
Restart instance
Horizon
Nova,
Neutron
Ironic
Ironic
Ironic,
Glance,
Ceph
Instance lifecycle
Nova,
Neutron
Ironic
Ironic
AArch64 baremetal images
- http://people.linaro.org/~yibo.cai/arm64-images/
- https://github.com/openstack/diskimage-builder

14. The trademarks featured in this presentation are registered and/or unregistered
trademarks of ARM Limited (or its subsidiaries) in the US and/or elsewhere. All
rights reserved. All other marks featured may be trademarks of their respective
owners.
Copyright © 2017 ARM Limited
©ARM 2017
Q & A