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Improving Service Availabiliy with Rule-Based Adaptation SSP 2018, - - PowerPoint PPT Presentation
Improving Service Availabiliy with Rule-Based Adaptation SSP 2018, - - PowerPoint PPT Presentation
Improving Service Availabiliy with Rule-Based Adaptation SSP 2018, Hildesheim Marc Adolf Reiner Jung & Lars Blmke 8 th November 2018 Introduction Cloud application rely on adaptation Up- and Down-Scaling (De-)Replication
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Example Scenarios
EasyPay
134.2.5.125
Cart A
10.10.1.3
Frontend
10.10.1.2
Database
10.10.1.4
System Border
Reiner Jung 3 / 10
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Example Scenarios
deploy Cart B, configure Database
EasyPay
134.2.5.125
Cart A
10.10.1.3
Cart B
10.10.1.7
Frontend
10.10.1.2
Database
10.10.1.4
System Border
Reiner Jung 3 / 10
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Example Scenarios
transfer state
EasyPay
134.2.5.125
Cart A
10.10.1.3
Cart B
10.10.1.7
Frontend
10.10.1.2
Database
10.10.1.4
System Border
Reiner Jung 3 / 10
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Example Scenarios
connect Cart B, update state
EasyPay
134.2.5.125
Cart A
10.10.1.3
Cart B
10.10.1.7
Frontend
10.10.1.2
Database
10.10.1.4
System Border
Reiner Jung 3 / 10
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Example Scenarios
disconnect Cart A
EasyPay
134.2.5.125
Cart A
10.10.1.3
Cart B
10.10.1.7
Frontend
10.10.1.2
Database
10.10.1.4
System Border
Reiner Jung 3 / 10
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Example Scenarios
EasyPay
134.2.5.125
Cart A
10.10.1.3
Cart B
10.10.1.7
Frontend
10.10.1.2
Database
10.10.1.4
System Border
Reiner Jung 3 / 10
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Example Scenarios
undeploy Cart A
EasyPay
134.2.5.125
Cart B
10.10.1.7
Frontend
10.10.1.2
Database
10.10.1.4
System Border
Reiner Jung 3 / 10
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Example Scenarios
configure Cart B to use SecuPay
SecuPay
104.9.4.22
EasyPay
134.2.5.125
Cart B
10.10.1.7
Frontend
10.10.1.2
Database
10.10.1.4
System Border
Reiner Jung 3 / 10
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Example Scenarios
confiugure Cart B to no longer use EasyPay
SecuPay
104.9.4.22
EasyPay
134.2.5.125
Cart B
10.10.1.7
Frontend
10.10.1.2
Database
10.10.1.4
System Border
Reiner Jung 3 / 10
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Solution
Divide adaptions actions in smaller execution actions
Reiner Jung 4 / 10
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iObserve
Application
Reiner Jung 5 / 10
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iObserve
Application
Monitoring <<service>>
Analysis <<service>>
Monitoring Events TCP
Reiner Jung 5 / 10
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iObserve
Application Candidate Architecture Selection Adaptation Planning
HTTP
Planning <<service>> <<service>>
PAM CAM
HTTP
PAM Monitoring <<service>>
Analysis <<service>>
Monitoring Events TCP
Reiner Jung 5 / 10
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iObserve
Application Candidate Architecture Selection Adaptation Planning
HTTP
Planning <<service>> <<service>>
PAM CAM
HTTP
PAM Monitoring <<service>>
Analysis <<service>>
Monitoring Events TCP
PAM Ex.- Plan
Execution <<service>>
HTTP
CAM
Reiner Jung 5 / 10
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iObserve
Application Candidate Architecture Selection Adaptation Planning
HTTP
Planning <<service>> <<service>>
PAM CAM
HTTP
PAM Monitoring <<service>>
Analysis <<service>>
Monitoring Events TCP
PAM Ex.- Plan
Execution <<service>>
HTTP
CAM
Execute Adaptations
Reiner Jung 5 / 10
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Planning
Candidate Architecutre Selection
PerOpteryx Runner PerOpteryx Model Receiver Model Sender Model Selection
Adaptation Planning
Model Receiver Palladio Model Model Send Execution Planner
Reiner Jung 6 / 10
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Adaptation Planning
Compute composed adaptation actions ‚ Difference PAM vs. CAM ‚ Consider data dependencies ‚ Consider state
B B' C C' B B' C' C B C' B' C B C B' C' B C C' B' B C' C B' C' B' B C
... 4! = 24 options, only two safe
A C B C' B'
Reiner Jung 7 / 10
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Generating atomic actions
Migration of B to B'
A C C'
deploy B' start state sync complete sync connect B' -> C' connect A -> B' disallow new sessions from A -> B wait for session completion disconnect A -> B disconnect B -> C undeploy B
B
Reiner Jung 8 / 10
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Generating atomic actions
Migration of B to B'
A C C'
deploy B' start state sync complete sync connect B' -> C' connect A -> B' disallow new sessions from A -> B wait for session completion disconnect A -> B disconnect B -> C undeploy B deploy B'
B B'
Reiner Jung 8 / 10
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Generating atomic actions
Migration of B to B'
A C C'
deploy B' start state sync complete sync connect B' -> C' connect A -> B' disallow new sessions from A -> B wait for session completion disconnect A -> B disconnect B -> C undeploy B start state sync
B B'
Reiner Jung 8 / 10
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Generating atomic actions
Migration of B to B'
A C C'
deploy B' start state sync complete sync connect B' -> C' connect A -> B' disallow new sessions from A -> B wait for session completion disconnect A -> B disconnect B -> C undeploy B connect B' -> C' connect A -> B'
B B'
Reiner Jung 8 / 10
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Generating atomic actions
Migration of B to B'
A C C'
deploy B' start state sync complete sync connect B' -> C' connect A -> B' disallow new sessions from A -> B wait for session completion disconnect A -> B disconnect B -> C undeploy B disallow new sessions from A -> B wait for session completion
B B'
Reiner Jung 8 / 10
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Generating atomic actions
Migration of B to B'
A C C'
deploy B' start state sync complete sync connect B' -> C' connect A -> B' disallow new sessions from A -> B wait for session completion disconnect A -> B disconnect B -> C undeploy B complete sync
B B'
Reiner Jung 8 / 10
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Generating atomic actions
Migration of B to B'
A C C'
deploy B' start state sync complete sync connect B' -> C' connect A -> B' disallow new sessions from A -> B wait for session completion disconnect A -> B disconnect B -> C undeploy B disconnect A -> B disconnect B -> C
B B'
Reiner Jung 8 / 10
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Generating atomic actions
Migration of B to B'
A C C'
deploy B' start state sync complete sync connect B' -> C' connect A -> B' disallow new sessions from A -> B wait for session completion disconnect A -> B disconnect B -> C undeploy B undeploy B
B'
Reiner Jung 8 / 10
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Execution
Service ‚ Map atomic action to cloud API calls ‚ Execute actions without violating data constraints ‚ Currently sequential execution ‚ Future concurrent execution Mapping ‚ Depends on cloud API ‚ Depends on service features ‚ State transfer ‚ Availability checks
Reiner Jung 9 / 10
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