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Table of Contents

...

Drawio

border	true

diagramName	us-to-us intent
simpleViewer	false
width
links	auto
tbstyle	top
lbox	true
diagramWidth	15511538
revision	23

NOTE - For this scenario, the default mesh wide policy must be set to "PERMISSIVE" on both the clusters. It will not work if the default Mesh Policy is "STRICT"

Important Info - cert-chain.pem is Envoy’s cert that needs to be presented to the other side. key.pem is Envoy’s private key paired with Envoy’s cert in cert-chain.pem. root-cert.pem is the root cert to verify the peer’s cert. In this example, we only have one Citadel in a cluster, so all Envoys have the same root-cert.pem.

Add Inbound service1 01

POST - traffic intent for the inbound service (service hosted behind the cluster)

...

Add Security details for clients of inbound service 01

WARNING - This task requires mutual TLS enabled because the following examples use principal and namespace in the policies

Code Block

language	js
theme	Midnight
title	GET
linenumbers	true

URL: /v2/projects/{project-name}/composite-apps/{composite-app-name}/{version}/traffic-group-intent/uservice-to-uservice-intent/clients/sleep/security/security-intent
{
	"metadata": {
	"name": "<name>" // unique name for each intent
    "description": "Security intent"
	"application": "<app1>",
	"userdata1": <>,
	"userdata2": <>
	}

	spec:{
	serviceAccountAccess : {[ "cluster.local/ns/default/sa/sleep": ["GET": "/status"],
							  "cluster.local/ns/default/sa/sleep" : ["GET": "/headers"]}
	}
}

RETURN STATUS: 201
RETURN BODY:
{ 
  "name": "<name>"
  "Message": "Security Rules created"
}

...

Add Security details for client 01

WARNING - This task requires mutual TLS enabled because the following examples use principal and namespace in the policies

Code Block

language	js
theme	Midnight
title	GET
linenumbers	true

URL: /v2/projects/{project-name}/composite-apps/{composite-app-name}/{version}/traffic-group-intent/uservice-to-uservice-intent/clients/sleep/security/security-intent
{
	"metadata": {
	"name": "<name>" // unique name for each intent
    "description": "Security intent"
	"application": "<app1>",
	"userdata1": <>,
	"userdata2": <>
	}

	spec:{
	serviceAccountAccess : {[ "cluster.local/ns/default/sa/sleep": ["GET": "/static"],
							  "cluster.local/ns/default/sa/sleep" : ["GET": "/api/v1/products"]}
	}
}

RETURN STATUS: 201
RETURN BODY:
{ 
  "name": "<name>"
  "Message": "Security Rules created"
}

...

Add Security details for client 02

WARNING - This task requires mutual TLS enabled because the following examples use principal and namespace in the policies

Code Block

language	js
theme	Midnight
title	GET
linenumbers	true

URL: /v2/projects/{project-name}/composite-apps/{composite-app-name}/{version}/traffic-group-intent/uservice-to-uservice-intent/clients/sleep/security/security-intent
{
	"metadata": {
	"name": "<name>" // unique name for each intent
    "description": "Security intent"
	"application": "<app1>",
	"userdata1": <>,
	"userdata2": <>
	}

	spec:{
	serviceAccountAccess : {[ "cluster.local/ns/default/sa/sleep": ["GET": "/api/v1/products"],
							  "cluster.local/ns/default/sa/sleep" : ["GET": "/static"]}
	}
}

RETURN STATUS: 201
RETURN BODY:
{ 
  "name": "<name>"
  "Message": "Security Rules created"
}

...

Code Block

language	yml
theme	Eclipse
title	ServiceEntry
linenumbers	true

apiVersion: networking.istio.io/v1alpha3
kind: ServiceEntry
metadata:
  name: servicename-httpbin
spec:
  hosts:
  - httpbin.defaultnamespace02.globallogicalcloud02
  # template for the remote service name - <servicename.namespace.global>
  # Treat remote cluster services as part of the service mesh
  # as all clusters in the service mesh share the same root of trust.
  location: MESH_INTERNAL
  ports:
  - name: http1
    number: 8000
    protocol: http
  resolution: DNS
  addresses:
  # the IP address to which httpbin.<namespace>.<logicalcloudname> will resolve to
  # must be unique for each remote service, within a given cluster.
  # This address need not be routable. Traffic for this IP will be captured
  # by the sidecar and routed appropriately.
  - 240.0.0.2
  endpoints:
  # This is the routable address of the istio ingress gateway in cluster02
  # routed to this address.
  - address: 172.25.55.50
    ports:
      http1: 15443 //Sni. Do not change this

...

Code Block

language	yml
theme	Eclipse
title	DestinationRule
linenumbers	true

apiVersion: networking.istio.io/v1alpha3
kind: DestinationRule
metadata:
  name: bookinfo-productpage-dr
  namespace: default
spec:
  host: "productpage.default.svc.cluster.local"
  trafficPolicy:
    tls:
    	  mode: ISTIO_MUTUAL
    loadbalancer:       consistentHashserverCertificate: /etc/certs/cert-chain.pem
       httpCookieprivateKey: "user2"/etc/certs/key.pem
    connectionPool:  caCertificates: /etc/certs/root-cert.pem
    loadbalancer:
      consistentHash:
        httpCookie: "user2"
    connectionPool:
      tcp:
        maxConnections: 10
      http:
        http2MaxRequests: 1000
        maxRequestsPerConnection: 100
    outlierDetection:
      consecutiveErrors: 7
      interval: 5m
      baseEjectionTime: 15m

...

Code Block

language	yml
theme	Eclipse
title	DestinationRule
linenumbers	true

apiVersion: networking.istio.io/v1alpha3
kind: DestinationRule
metadata:
  name: sleep-dr
  namespace: default
spec:
  host: "sleep.default.svc.cluster.local"
  trafficPolicy:
    tls:
      mode: ISTIO_MUTUAL

MUTUAL
	  mode: MUTUAL
      serverCertificate: /etc/certs/cert-chain.pem
      privateKey: /etc/certs/key.pem
      caCertificates: /etc/certs/root-cert.pem

Cluster 02 Resources

1. ServiceEntry - To enable access to bookinfo-productpage

Code Block

language	yml
theme	Eclipse
title	ServiceEntry
linenumbers	true

apiVersion: networking.istio.io/v1alpha3
kind: ServiceEntry
metadata:
  name: servicename-bookinfo-productpage
spec:
  hosts:
  - productpage.default.globalnamespace01.logicalcloud01 // format is <svc>.<namespace>.<logical_cluster_domain>
  # template for the remote service name - <servicename.namespace.global>
  # Treat remote cluster services as part of the service mesh
  # as all clusters in the service mesh share the same root of trust.
  location: MESH_INTERNAL
  ports:
  - name: http1
    number: 8000
    protocol: http
  resolution: DNS
  addresses:
  # the IP address to which httpbin.<namespace>.<logicalcloudname> will resolve to
  # must be unique for each remote service, within a given cluster.
  # This address need not be routable. Traffic for this IP will be captured
  # by the sidecar and routed appropriately.
  - 240.0.0.3
  endpoints:
  # This is the routable address of the istio ingress gateway in cluster02
  # routed to this address.
  - address: 172.25.55.210
    ports:
      http1: 15443 //Sni. Do not change this

...

Versions Compared

Old Version 2

New Version 3

Key

Add Inbound service1 01

Add Security details for clients of inbound service 01

Add Security details for client 01

Add Security details for client 02

Cluster 02 Resources

1. ServiceEntry - To enable access to bookinfo-productpage