Achieving Five Nines of VNF Reliability in Telco-grade OpenStack - - PowerPoint PPT Presentation
Achieving Five Nines of VNF Reliability in Telco-grade OpenStack Cloud Panel Discussion 1:50 PM 2:30 PM on Wednesday, April 27, 2016 Kandan Kathirvel, AT&T; Eoin Walsh, Intel; Rimma Iontel, Red Hat Inc. and Fausto Marzi, Ericsson.
Kandan Kathirvel, AT&T; Eoin Walsh, Intel; Rimma Iontel, Red Hat Inc. and Fausto Marzi, Ericsson. Moderated by Haseeb Akhtar, Ericsson 1:50 PM – 2:30 PM on Wednesday, April 27, 2016
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Compute Datacenter / Central Office
Application Orchestration Software Software defined Network
Same Purpose built and dedicated for field of use
N/w Fabric
Purpose built & dedicated (Most cases) Physical Connection – no SDN
Physical Network Function Virtual Network Function
Same
Host OS & Virtualization
Not Virtualized (most cases) Vendor provided OS Mostly Manual or Contained Purpose build software
Operationally Perfected over decades
Early adoption and rapid evolution
Same
Multi-tenant (Common framework) Commodity hardware (any Vendor) Cloud Provided (Common) Common automation Rapidly evolving New & Evolving
Requires significant innovation
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High Risk of Application Outages Low Risk of Application Outages Cloud Aware Applications
Most of VNFs
Few
1 2 3 4 5
Openstack Region
Geo Location 1 (DC1) Geo Location 2 (DC2) Geo Location 1 (DC1) Geo Location 4 (DC4)
99.99% (52.56 mins down/year) 99.9% (8.76 hrs down/year) 99.999%(5.26 Mins down/year) VNF Availability Some VNFs current state VNF HA in a region VNF - Single VM VNF HA in 2 regions at same DC VNF HA across 2 DCs VNF HA across 4 DCs Optimal
VNF
Single Instance of OpenStack region is about 99.9% (8.76 hours unplanned downtime per year)
Openstack Region Openstack Region1 Openstack Region2 Single DC Single DC Single DC
Few
Optimal
2 Regions at a DC
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Few
different servers
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Open APIs
VIM
Compute Platform Resource Monitoring & Reporting Virtualization Enhanced Platform Awareness
Service Catalog Service Orchestration Service Assurance VNF Manager
SDN Controller
Network Orchestration Security
Services
Virtual Resource Monitoring & Reporting
Descriptor Repositories OSS/BSS
VNFC
Analytics
Storage Network vCompute vStorage vNetwork
VNF VNFC VNFC VNF VNFC
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Few
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Open APIs
VIM
Compute Platform Resource Monitoring & Reporting Virtualization Enhanced Platform Awareness
Service Catalog Service Orchestration Service Assurance VNF Manager
SDN Controller
Network Orchestration Security
Services
Virtual Resource Monitoring & Reporting
Descriptor Repositories OSS/BSS
VNFC
Analytics
Storage Network vCompute vStorage vNetwork
VNF VNFC VNFC VNF VNFC
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Few
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Prerequisite:
Compute nodes shared storage
Disaster Workflow:
Disaster is detected Compute node evacuation Users connect to the new service
Risks:
Node Fencing
Active HA Controller
Compute Node 1
VM VM VM
HA Agent Compute Node n HA Agent Compute Node 2
VM VM VM
HA Agent
VM VM VM
Control Node 1 Control Node 2 Control Node 3
Database
Corosync + Pacemaker HA HA HA
VM VM VM VM VM VM VM VM VM
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BGP
AS XXXXX
Internet
DC1 DC2 1.1.1.0/24 1.1.2.0/24 VM1 Evacuation VM1
FIP: 100.100.1.15 Freezer-dr-api FIP: 100.100.1.15 Freezer-dr-api
Prerequisite:
Data replication
Operational Workflow:
Floating IPs retrieved from Nova Announce IPs with BGP or OSPF
Disaster Workflow:
Disaster is detected Compute node evacuation On the other Compute Nodes the floating IPs are retrieved Floating IP announced with BGP or OSPF Users connect to the new service
Risks:
Node and DC Fencing
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Few
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