As the popularity of microservices continues to rise, so does the need for an efficient means of intercommunication. Features such as service discovery, client-side load balancing, and circuit breakers become invaluable tools as the complexity of your landscape grows. Thus, the rising popularity of the service mesh as means of delivering those capabilities. While this technology space is still young, Istio and Envoy have already become the tools that many use to solve these problems. The Pivotal Application Service (PAS) integration with these solutions introduced weighted routing and guaranteed service identity—and now we’re bringing these features to Pivotal Container Service (PKS) via the new Pivotal Ingress Router. In this webinar, we’ll explore why a service mesh matters and how Pivotal Ingress Router works, and we’ll give you a sneak peak into its future. Speakers: Brian McClain, Assoc. Principal Product Marketing Manager Tyler Britten, Sr. Principal Technologist, Pivotal

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Pivotal Service Mesh
Brian McClain
Tyler Britten

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Safe Harbor Statement
This presentation contains statements which are intended to outline the general direction of certain of Pivotal's offerings. It is
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We’re going to talk about three things.
What is
Service Mesh
and what
problems does
it address?
Why Istio &
Envoy?
A Look at
Pivotal Service
Mesh

4. What is Service Mesh, and what
problems does it address?
Pivotal Service Mesh

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First principles: Why Microservices?
● One-way velocity is not inherently valuable
● The business value of rapid software innovation is in the speed with which an
organization can learn from its customers.
● Architecting applications as composable services enables more rapid
innovation, but introduces complexity.

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Polyglot Microservice Architectures
End
User
v1
v2
v3
v1
v2
v1

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Common Concerns
Developers
● Load Balancing
● Shifting traffic to new versions
● Rate limiting
● Circuit Breaking
● Client-side service discovery, load
balancing, retries, timeouts, etc
● Security
● Metrics and observability
Platform Engineers
● Authorization and Authentication
● Security (Policy)
● Mutual TLS
● Metrics and Observability
● Cross-datacenter failover

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Traditional Solution: Language Specific Libraries
End
User
v1
v2
v3
v1
v2
v1

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Challenges
● Consistency across lines of business and
language frameworks
● Visibility - Operators don’t have a unified view of
current state
● Burden on app developers to implement security
● Configuration and Version Management

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v1
v2
v3
v1
v2
v1
Ingress
Proxy
Service Mesh: Centralized Management of Sidecars
Egress
Proxy
End
User
Service Mesh
Control Plane

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How does the Service Mesh pattern help?
● Polyglot solution
● Policies can be applied and managed at scale
● Security abstracted from the developer
● Consistent, declarative UX for all personas
● Centralized control and observability
● Configuration can be governed by role-based access control

12. Istio & Envoy
Pivotal Service Mesh

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v1
v2
v3
v1
v2
v1
Ingress
Proxy
Service Mesh: Centralized Management of Sidecars
Egress
Proxy
End
User
Service Mesh
Control Plane

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Envoy is the Proxy
● Developed at Lyft, contributed to Cloud Native Foundation
● Designed from scratch to be fully API driven
● Low memory footprint
● Rich telemetry
● Intelligent traffic management
● Distributed security
● Used in PAS since 2.1 (Instance Identity)
● Being adopted widely; used in production by several Pivotal
customers independent from our products

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Istio is the Control Plane
● Purpose built for Envoy
● Vibrant OSS community including contributors
from Google, IBM, Cisco, and Pivotal
● Platform agnostic
● Already being progressively added to PAS
○ Weighted Routing
● Emphasis on pluggability and extensibility

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Why has Pivotal invested in Istio & Envoy?
● With PCF, Pivotal aims to increase operator and developer productivity at every
level of abstraction
● Istio is well-aligned to the vision and roadmap for PCF
○ Applicability to all app types
○ Run and Operate microservices at scale
○ Secure by Default
○ Multi-cloud
● Large OSS community contributing to Istio
● By leveraging Istio & Envoy, we expect to deliver these outcomes more quickly
than if we built our own solutions.

17. Current State & Roadmap
Pivotal Service Mesh

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Client
Load Balancer Load Balancer
PAS
Container
Sidecar
App
TCP
Router
Gorouter
TLS for Ingress to Container, Routing Guarantees
Shipped in PAS 2.1
● Envoy sidecar running in every Linux
container (Windows support coming
soon)
● Single purpose: terminating TLS for
ingress via Gorouter - entire data
path encrypted from client to
container (encryption of C2C coming
soon)
● Providing container identity so that
Gorouter can prevent misrouting

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Weighted Routing for PAS Ingress
Shipped in PAS 2.5 (Beta)
● Enable app developer to
control percentage of HTTP
requests sent to each version
of an app
● Envoy as platform Istio ingress
gateway, deployed alongside
Gorouter and TCP Router,
dynamically configured by Istio
● Operator must enable Service
Mesh in PAS tile
Client
Load Balancer
PAS
Container
Sidecar
App v1
Istio
Ingress
TCP
Router
Gorouter
Container
Sidecar
App v2
90% 10%
Load Balancer

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Platform managed sidecars for app-to-app
communication
● In development; targeting Beta
support in PAS 2.7
● Platform managed sidecars enable
client-side load balancing, timeouts,
and retries
○ Improve developer efficiency
● Platform managed sidecars enable
mTLS between all applications in
PAS
○ Improves developer efficiency
○ Increase security posture
PAS
Container
Sidecar
App v1
Istio
Ingress
TCP
Router
Gorouter
Container
Sidecar
App v2

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Pivotal is Bringing Envoy and Istio to .NET and Windows
Workloads
Pivotal have been actively contributing
Windows support to Envoy. Once that
milestone is reached, Windows workloads
will be ready to participate in the upcoming
PCF service mesh and routing capabilities.

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Observations
PAS, PKS, and all data services have common needs with
regard to security policy, routing, and observability of
inter-service communications.
Customers, especially Security teams, are enthusiastic
about the service mesh pattern.
Kubernetes users are feeling pain with the lack of a multi-
cluster ingress routing solution. (PAS, in contrast, includes
automation to mask network config complexity.)
Istio and Envoy are strategically critical technologies to
delivering on customer requirements.

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Pivotal Service Mesh Vision
Pivotal Service Mesh is a collection of platform services that improve security,
traffic management, and observability for Pivotal and partner products, including
PAS, PKS, and data services.
● Ingress, service to service, and egress
● Within clusters, between clusters, between clouds
● Security policy enforcement at application protocol layer, in addition to
SDN-based enforcement
● Traffic management
● Exposing telemetry to operators and app developers from all sidecars in
the mesh
The 1.0 release of Pivotal Service Mesh is the first step in realizing this vision.

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K8s (PKS)
Pivotal Service Mesh 1.0
Eliminates the need for platform
operators to configure load
balancers and DNS for each PKS-
deployed K8s cluster
● HTTP routing to K8s API nodes
● Runs on K8s; bring-your-own or
use PKS
K8s (PKS)
Worker
Pod
Load Balancer
K8s API client (kubectl)
K8s (PKS)
Worker
Pod
API API
workload client
WorkerWorker
Mesh
Ingress
(Envoy)
Mesh Control
Plane (Istio)

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Pivotal Service Mesh: Roadmap
● Consolidated ingress service for
PAS and PKS
○ Improve platform operator
efficiency
● Support for other Pivotal services
(PFS, Data Services, etc)
PAS
Diego Cell
Sidecar
App
K8s (PKS)
Load Balancer
K8s API client
(kubectl)
K8s (PKS)
Worker
App
Master
workload client
WorkerWorker
Mesh
Ingress
(Envoy)
Mesh Control
Plane (Istio)
Cloud Controller
PAS API client
(cf)
Other Services

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Pivotal Service Mesh: Roadmap
Security
● Bring your own certs for custom
domains
● Require HTTPS, redirect HTTP to
HTTPS
● Workload JWT Token Acquisition,
Validation, and RBAC
Traffic Management
● HTTP/2, UDP
● Rate limiting
Observability
● Tracing
● Metrics
Multi-cluster / Multi-cloud / Off-platform
● Traffic Management
● Security
● Observability
Prioritization subject to customer feedback.

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28. Thank you!
Pivotal Service Mesh