Integrating Network. Management for Cloud
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1 Integrating Network Management for Cloud Computing Services Final Public Oral Exam Peng Sun
2 What is Cloud Computing Deliver applications as services over Internet Run applications in datacenters Lower capital and operational expenses 1
3 Cloud Services are Growing Public cloud for consumer service Amazon Web Services Microsoft Azure 2
4 Cloud Services are Growing Public cloud for consumer service Amazon Web Services Microsoft Azure Enterprises out-source IT service Storage: Box, Analytics: Salesforce, Productivity: Office365, 2
5 Quality of Cloud Service Depends on Network Quality Datacenter ISP App Routing OS Hardware ISP Enterprise Network Servers Network Devices ISP 3
6 Improve Network Quality The old way cannot keep up with the growth of cloud services Deploying more devices with higher bandwidth 4
7 Improve Network Quality The old way cannot keep up with the growth of cloud services Deploying more devices with higher bandwidth The key is proper management of network resources 4
8 Examples of Network Management Solutions 5
9 Examples of Network Management Solutions Traffic Engineering 5
10 Examples of Network Management Solutions Traffic Engineering Load Balancing 5
11 Examples of Network Management Solutions Traffic Engineering Load BalancingLink Corruption Mitigation 5
12 Examples of Network Management Solutions Traffic Engineering Load BalancingLink Corruption Network Mitigation Device Configuration 5
13 Examples of Network Management Solutions Traffic Engineering Load BalancingLink Corruption Network Mitigation Device Configuration Device Power Control 5
14 Examples of Network Management Solutions Traffic Engineering Load BalancingLink Corruption Network Mitigation Device Configuration Device Power Control 5
15 Problems of Current Network Management Disjoint management of network components Low-level interfaces with network devices 6
16 Disjoint Management Systems Division of labor in pre-cloud era App OS Servers Routing Hardware Network Devices Users ISP 7
17 Disjoint Management Systems Division of labor in pre-cloud era App OS Routing Hardware Users Servers Server Provisioning Network Devices ISP 7
18 Disjoint Management Systems Division of labor in pre-cloud era Traffic Engineering App OS Routing Hardware Users Servers Server Provisioning Network Devices ISP 7
19 Disjoint Management Systems Division of labor in pre-cloud era Traffic Engineering App OS Servers Server Provisioning Routing Hardware Infrastructure Network Devices ISP Users 7
20 Datacenter Breaks Balance Coordination of server & network: More applications are built as multitier distributed systems Intra-datacenter traffic is new majority 8
21 Datacenter Breaks Balance Coordination of server & network: More applications are built as multitier distributed systems Intra-datacenter traffic is new majority Infrastructure evolution speeds up: Network architecture changes (e.g., FatTree) 8
22 Disjoint Mgmt. is Bottleneck Because: Cloud service providers have stakes in all three management areas: Server, infrastructure, traffic 9
23 Disjoint Mgmt. is Bottleneck Because: Cloud service providers have stakes in all three management areas: Server, infrastructure, traffic Great opportunity exists for consolidation Google and Microsoft on SoftWAN 9
24 Yet Another Problem: Low-level Device Interaction Hardware vendors differentiate with specialized devices Network operation: intensively uses vendor-specific APIs heavily depends on experiences 10
25 Cloud Service is Different Much more devices in datacenters than traditional networks Automation is a must 11
26 Cloud Service is Different Much more devices in datacenters than traditional networks Automation is a must Commodity devices instead of specialized hardware Homogeneity is preferred 11
27 Cloud Service is Different Much more devices in datacenters than traditional networks Automation is a must Commodity devices instead of specialized hardware Homogeneity is preferred Lower vendor dependence pays off (MS & Amazon on SoftLB) 11
28 Promising Yet Limited SDN Great way of automating traffic management with high-level programming paradigms Yet literature focus on just traffic 12
29 Summary of Problems This dissertation solves: Disjoint management of server, infrastructure, and traffic Low-level device interaction for broader scope of network management 13
30 Practical Approach 14
31 Practical Approach Identify opportunity of integration 14
32 Practical Approach Identify opportunity of integration Simple and expressive programming abstraction 14
33 Practical Approach Identify opportunity of integration Simple and expressive programming abstraction Efficient and scalable system for execution 14
34 Practical Approach Identify opportunity of integration Simple and expressive programming abstraction Deployment in real world Efficient and scalable system for execution 14
35 Practical Approach Identify opportunity of integration Simple and expressive programming abstraction Deployment in real world Efficient and scalable system for execution 14
36 Contributions Project Publication Deployment Statesman SIGCOMM 14 Microsoft Azure HONE JNSM, Vol. 23, 2015 Overture/ Verizon Sprite SOSR 15 In process with OIT 15
37 Statesman: Safe Datacenter Traffic/Infrastructure Management Other ISPs Datacenter ISP ISP App Routing Enterprises OS Hardware Servers Network Devices 16
38 Hone: End-host/Network Cooperative Traffic Management Other ISPs Datacenter ISP ISP App Routing Enterprises OS Hardware Servers Network Devices 17
39 Sprite: Direct Control of Entrant ISP for Enterprise Traffic Other ISPs Datacenter ISP ISP App Routing Enterprises OS Hardware Servers Network Devices 18
40 What Follows Brief explanation of each project Open issues Related work Q&A 19
41 Statesman: Integrating Network Infrastructure Management 20
42 Problem for Cloud Providers Multiple mgmt. solutions coexist for traffic and infrastructure mgmt.
43 Problem for Cloud Providers Multiple mgmt. solutions coexist for traffic and infrastructure mgmt. Complexity is the main problem
44 Problem for Cloud Providers Multiple mgmt. solutions coexist for traffic and infrastructure mgmt. Complexity is the main problem Development Scale & heterogeneity of devices
45 Problem for Cloud Providers Multiple mgmt. solutions coexist for traffic and infrastructure mgmt. Complexity is the main problem Development Scale & heterogeneity of devices Coordination Conflicts and safety violations
46 Conflict Core1 2 Agg A Agg B ToRs 22
47 Conflict Core1 2 Agg A Agg B Link-corruptionmitigation adjusts traffic away from Core1 ToRs 22
48 Conflict Core1 2 Agg A Agg B Link-corruptionmitigation adjusts traffic away from Core1 ToRs TE tunes traffic among links to Core1, 2 22
49 Safety Violation Core1 2 Agg A Agg B ToRs 23
50 Safety Violation Core1 2 Agg A Agg B Link-corruptionmitigation shuts down faulty Agg A ToRs 23
51 Safety Violation Core1 2 Agg A Agg B Link-corruptionmitigation shuts down faulty Agg A ToRs Firmware-upgrade schedules Agg B to upgrade 23
52 The Statesman System Network operating system Common layer to consolidate traffic and infrastructure management Resolve conflicts & safety violations 24
53 The Statesman System Network operating system Common layer to consolidate traffic and infrastructure management Resolve conflicts & safety violations Core techniques: Network state & three-view workflow State dependency model Scalable & robust system 24
54 Three-view Workflow with Network State Observed State Proposed State Target State 25
55 Three-view Workflow with Network State Application Application Solutions Observed State Proposed State Target State 25
56 Three-view Workflow with Network State Application Application Solutions Observed State What we see from the network Proposed State Target State 25
57 Three-view Workflow with Network State Application Application Solutions Observed State What we see from the network Proposed State What we want the network to be Target State 25
58 Three-view Workflow with Network State Application Application Solutions Statesman Observed State Proposed State Target State What we see from the network What we want the network to be What can be actually done on the network 25
59 State Dependency for Conflict Detection Link Device 26
60 State Dependency for Conflict Detection Link PowerState Device 26
61 State Dependency for Conflict Detection FirmwareVersion Link PowerState Device 26
62 State Dependency for Conflict Detection ConfigurationState FirmwareVersion Link PowerState Device 26
63 State Dependency for Conflict Detection ConfigurationState ConfigurationState AdminState FirmwareVersion Link PowerState Device 26
64 State Dependency for Conflict Detection RoutingState ConfigurationState ConfigurationState FirmwareVersion AdminState Link PowerState Device 26
65 State Dependency for Conflict Detection PathState RoutingState ConfigurationState ConfigurationState FirmwareVersion AdminState Link PowerState Device 26
66 Statesman System Observed State Proposed State Target State 27
67 Statesman System Storage Service Observed State Proposed State Target State 27
68 Statesman System Storage Service Observed State Proposed State Target State Monitor 27
69 Statesman System Storage Service Checker Observed State Proposed State Target State Monitor 27
70 Statesman System Storage Service Checker Observed State Proposed State Target State Monitor Updater 27
71 Deployment Overview Operational in Microsoft Azure since October 2013 Cover 10 DCs of 20K devices 3 production management solutions built and running 28
72 Case: Resolve Conflict Inter-DC TE & Firmware-upgrade DC = Data Center BR = Border Router BR 3 DC 2 BR 4 BR 1 DC 1 BR 2 BR 8 DC 4 BR 7 BR 6 BR 5 DC 3 29
73 30
74 30
75 Firmware-upgrade acquires lock of BR1 30
76 TE fails to acquire lock, and moves traffic away 30
77 TE fails to acquire lock, and moves traffic away 30
78 BR1 firmware upgrade starts 30
79 BR1 firmware upgrade starts BR1 firmware upgrade ends. Lock released. 30
80 BR1 firmware upgrade starts TE re-acquires lock, and moves traffic back 30
81 BR1 firmware upgrade starts TE re-acquires lock, and moves traffic back 30
82 Statesman Summary Programming abstraction Three-view network state model Efficient and scalable system Automatic and safe infrastructure management system Deployment Operational in Microsoft Azure worldwide SIGCOMM
83 Hone: Combining End-host and Network for Traffic Management 32
84 Problem Server Traffic Management Solutions App OS Network Traffic management is limited by the scope of network devices Coarse granularity & limited view 33
85 The Hone System Bring end hosts into traffic mgmt. 34
86 The Hone System Bring end hosts into traffic mgmt. Core techniques: Access of socket & transport layers 34
87 The Hone System Bring end hosts into traffic mgmt. Core techniques: Access of socket & transport layers Expressive three-stage programming framework 34
88 The Hone System Bring end hosts into traffic mgmt. Core techniques: Access of socket & transport layers Expressive three-stage programming framework Efficient system with parallel execution of partitioned program 34
89 Programming Model Measure Stage Analyze Stage Control Stage Framework for each stage Programmable body of each stage Focus on measurement and analysis 35
90 Hone System Host App Server OS Network 36
91 Hone System Host App Server OS Hone Agent Network 36
92 Hone System Controller Mgmt. Program Hone Runtime System Host App Server OS Hone Agent Network 36
93 Hone System Controller Mgmt. Hone Runtime Program System Host App Server OS Hone Agent Network 36
94 Hone System Controller Host Host Local Exe. Plan Global Hone Runtime System Net Local Exe. Plan Exe. Plan App Server OS Hone Agent Network 36
95 Hone System Controller Global Hone Runtime System Exe. Plan Host Host Local App Hone Exe. Plan Agent Server OS Net Local Exe. Plan Network 36
96 Evaluation Built multiple traffic management solutions on Hone Show distributed rate limiting here Limit total bandwidth across all instances of a tenant in a public cloud 37
97 DRL on HONE Host-side execution: Measure Calculate throughput Aggregate among connections Controller-side execution: Aggregate among hosts Generate new rate-limit policies 38
98 Distributed Rate Limiting 39
99 Distributed Rate Limiting 39
100 Distributed Rate Limiting 39
101 Distributed Rate Limiting 39
102 Distributed Rate Limiting 39
103 Hone Summary Programming abstraction Access to fine-grained data in servers Three-stage framework Efficient and scalable runtime Deployment Integrated into product of Overture for Verizon Business Cloud Springer JNSM Volume 23,
104 Sprite: Bridging Enterprise and ISP for Inbound Traffic Control 41
105 Problem for Enterprises: Inbound Traffic Engineering Service 1 ISP 1 Internet ISP 2 Enterprise Network Service 2 ISP 3 42
106 Problem for Enterprises: Inbound Traffic Engineering ISP 1 Internet ISP 2 Enterprise Network Service 2 ISP 3 42
107 Problem for Enterprises: Inbound Traffic Engineering ISP 1 Internet ISP 2 Enterprise Network Service 2 ISP 3 42
108 Mechanism of Sprite Enterprise Network ISP 1 YouTube User Other ISPs ISP 2 VoIP 43
109 Mechanism of Sprite Enterprise Network /24 ISP 1 YouTube User Other ISPs ISP 2 VoIP /24 43
110 Mechanism of Sprite Enterprise Network /24 ISP 1 YouTube User Other ISPs ISP 2 VoIP /24 43
111 Mechanism of Sprite /24 Enterprise Network Src: User ISP 1 Other ISPs YouTube ISP 2 VoIP /24 43
112 Mechanism of Sprite /24 Enterprise Network Src: User ISP 1 Other ISPs YouTube Src: ISP 2 VoIP /24 43
113 Challenges Naïve solution All done by the border router 44
114 Challenges Naïve solution All done by the border router Need a distributed solution 44
115 Challenges Naïve solution All done by the border router Need a distributed solution Control-plane scaling 44
116 Challenges Naïve solution All done by the border router Need a distributed solution Control-plane scaling Data-plane scaling 44
117 Challenges Naïve solution All done by the border router Need a distributed solution Control-plane scaling Data-plane scaling Need a simple management interface 44
118 Three Tiers of Abstractions Abstraction Example 45
119 Three Tiers of Abstractions Abstraction Example High-level Policy 45
120 Three Tiers of Abstractions Abstraction High-level Policy Example <BioDept, Analytic> BestLatency 45
121 Three Tiers of Abstractions Abstraction High-level Policy Example <BioDept, Analytic> BestLatency Networklevel Rule 45
122 Three Tiers of Abstractions Abstraction High-level Policy Example <BioDept, Analytic> BestLatency Networklevel Rule < /16, /24> ISP1 45
123 Three Tiers of Abstractions Abstraction High-level Policy Example <BioDept, Analytic> BestLatency Networklevel Rule < /16, /24> ISP1 45
124 Three Tiers of Abstractions Abstraction High-level Policy Example <BioDept, Analytic> BestLatency Networklevel Rule < /16, /24> ISP1 Per-flow Rule 45
125 Three Tiers of Abstractions Abstraction High-level Policy Example <BioDept, Analytic> BestLatency Networklevel Rule < /16, /24> ISP1 Per-flow Rule < , > SNAT to
126 Case: Dynamic Perf-driven Balancing Move users connections among ISPs for best per-user performance Live Internet experiment on AWS VPC and PEERING 10 users watch movies on YouTube 46
127 User YouTube Throughput 47
128 Sprite Summary Direct and fine-grained inbound traffic control Scalable solution Scaling control and data planes Evaluation In collaboration with OIT SOSR 15 48
129 Open Issue #1 Statesman + Hone Merge Hone into Statesman Joint server, traffic, infrastructure mgmt. Possible exploration State abstraction for server data Dependency of server and network states Safety invariants involving servers 49
130 Open Issue #2 Transactional Statesman Transactional semantics for conflict resolution Possible exploration Grouping semantics Condition semantics 50
131 Open Issue #3 Hone for Multi-tenant Cloud Loosen the assumption of having access to the hosts OS Possible exploration Infer stats in guest OS from data in hypervisor 51
132 Related work 52
133 Statesman Related Work Work What they do Statesman SDN works Onix Pyretic Corybantic Centralized control of flows Single repository of network stats Target at flow management Tight cross-application proposal evaluation Wider spectrum of management applications Three-view network state model Wider spectrum of applications Loose coupling FlowVisor Virtual topology slicing Network state model 53
134 Hone Related Work Work What they do Hone Network Exception Handler Use hosts only as software switches Go deeper into socket layer Gigascope Extend SQL Use functional language to construct Chimera Specific application (intrusion detection) Support various management solutions MapReduce Naturally parallelizable data Data inherently associated with collection point 54
135 Sprite Related Work Work What they do Sprite BGP AS-path prepending Works on Internet rearchitecture Tunnel-based works Tune BGP configurations to influence neighboring ASes Clean-slate design in routing or hosts Two ends cooperate to control traffic Direct control from inside enterprise networks Incrementally deployable Only need the client side to act 55
136 Thanks! Q&A 56
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