Multi-Tenant Ingress with Istio

Multi-Tenant Ingress using Istio
Christian Posta | @christianposta | Solo.io
Sandeep Parikh | @crcsmnky | Google Cloud

Challenge
Examples
Solutions
What’s new
Questions
What we’ll cover

Running multi-
tenant-ingress
deployments

What is multi-ingress?
When running large multi-
tenant deployments, teams
or workloads may need
their own dedicated
ingress, or apps may need
different ingress setups.

Isolation for individual teams
and logical workloads
Why multi-ingress?
Multiple ingress types like APIs
vs user-facing services
Serving multiple applications
out of different domains
Require unique SSL certificates
for each domain being served

Isolate teams and
logical workloads
Support for different
ingress types
Each ingress needs
HTTPS support
Top-level requirements

Critical features
Platform load
balancer support
SSL certificate
support
Kubernetes-native
service
Traffic management
mechanisms
API gateway
support
Auth support for in-
cluster services

Kubernetes Ingress
● More capable than Service
LoadBalancer
● SSL certificate support
● Multiple ingress resources can be
deployed
● Can integrate with L7 platform load
balancers
● Supports single-service, simple
fanout, or name-based virtual hosts

Kubernetes Ingress Controllers!

Traefik
Features!
Tiny, fast, Go!
IngressRoute CRD!
Ingress-only?
traefik.io

nginx
Features!
Tried and true
Many examples
Ingress-only?
nginx.com/products/nginx/
kubernetes-ingress-controller

Is there an Istio-
native option?

Istio Ingress Gateway
● Supports workloads across different
namespaces
● Native Kubernetes Service, integrates
with platform load balancers
● Support for SSL certificates
● Encrypted traffic to downstream
services

Istio Ingress Gateway
Out of the box, you get one.
What if you want more?

Generate a new
ingressgateway
Use helm to generate the
required components to run your
own ingress gateway.
cd istio-1.3.2/install/kubernetes/helm
helm template istio
--name istio --namespace istio-system
-x charts/gateways/templates/serviceaccount.yaml
>> my-ingressgateway.yaml
helm template istio
-x charts/gateways/templates/deployment.yaml
helm template istio
-x charts/gateways/templates/service.yaml

Update
metadata
Update the generated
ServiceAccount, Deployment,
and Service
ServiceAccount:
- metadata.name
- metadata.labels
Deployment:
- metadata.name
- metadata.labels
- spec.selector.matchLabels
- spec.template.metadata.labels
- spec.containers[].name
- spec.containers[].volumeMounts[]
- spec.serviceAccountName
- spec.volumes[]
Service:
- metadata.name
- metadata.labels
- spec.ports[].http2.nodePort
- spec.ports[].https.nodePort
- spec.ports[].tcp.nodePort
- spec.selector

Wiring up
Istio objects
When creating Gateway objects,
configure spec.selector for
your new ingressgateway
apiVersion: networking.istio.io/v1alpha3
kind: Gateway
metadata:
name: gateway-example
spec:
selector:
istio: example-ingressgateway
servers:
- port:
number: 80
name: http
protocol: HTTP
hosts:
- "*"

23 | Copyright © 2019
Gloo Edge Proxy
EAST-WEST
TRAFFIC
NORTH-SOUTH
TRAFFIC
SERVIC
E
I
SERVIC
E
II
SERVIC
E
III
SERVIC
E
IV
SERVIC
E
V

GLOO FEATURES
Gloo is a fully-featured edge
Gateway and Ingress
Controller built on Envoy
Proxy.
Gloo was built to extend the
capabilities of the service
mesh.
Gloo runs on any platform
bare-metal, VM, Kubernetes,
and Cloud.

Gloo Gateway Complements Service Mesh
• Extend with powerful edge capabilities (as seen previously)
• Integrate with mTLS (SDS)
• Integrate with telemetry collection
• Integrate with distributed tracing
• Provide full North-South & East-West networking abstraction

ENVIRONMENT
SECRET
CONFIGURATION
Data Plane
Upstream
gRPC-JSON transcoder
Rate limiting
External AUTH
…
Control Plane
Configure and manage
envoy’s plugins
Router

Istio 1.3
52 improvements
662 commits
400+ contributors
300 companies
Full release notes
Released 2019-09-12

Istio 1.3 Improve the UX for new users adopting Istio
Key Improve the UX for debugging problems
Themes Support more apps w/o addt’l config

Istio 1.3 highlights
containerPort no longer required
Customizable generated Envoy config
Mixer-less telemetry (experimental)
Intelligent protocol detection (experimental)
Operator-based install (experimental)
New commands in istioctl experimental for debugging

$ istioctl x --help
Experimental commands that may be modified or deprecated
Usage:
istioctl experimental [command]
Aliases:
experimental, x, exp
Available Commands:
add-to-mesh Add workloads into Istio service mesh
analyze Analyze Istio configuration and print validation messages
auth Inspect and interact with authn/authz policies in the mesh
describe Describe resource and related Istio configuration
kube-uninject Uninject Envoy sidecar from Kubernetes pod resources
manifest Commands related to Istio manifests
metrics Prints metrics for specified workload(s) when running in K8S
profile Commands related to Istio configuration profiles
remove-from-mesh Remove workloads from Istio service mesh

$ istioctl x --help
Usage:
Aliases:
Available Commands:
Analyze YAML files
Analyze live cluster
Simulate effect of applying YAML

$ istioctl x --help
Usage:
Aliases:
Available Commands:
Operator-based install!
Generate and/or apply manifests
Diff against multiple manifests
Migrate from Helm config to Operator

What’s Next
Security
Around 3 weeks after the next
Istio release, we’ll dig into
security-centric use cases,
and how Istio can help.
Istio 1.4 → Late Q4 2019

Thank You!
Questions or Comments?
Find us @christianposta and @crcsmnky
Learn More
● Istio istio.io
● Google Cloud cloud.google.com
● Solo.io www.solo.io
● Gloo gloo.solo.io
● Service Mesh Hub servicemeshhub.io
Demo
● github.com/crcsmnky/istio-multi-ingress

Multi-Tenant Ingress with Istio

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