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draw.io Diagram
bordertrue
diagramNameus-to-us intent
simpleViewerfalse
width
linksauto
tbstyletop
lboxtrue
diagramWidth1136
revision15


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

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service1 01

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

Code Block
languagejs
themeMidnight
titlePOST
linenumberstrue
URL: /v2/projects/{project-name}/composite-apps/{composite-app-name}/{version}/traffic-intent-set/us-to-us-intents/

POST BODY:
{
	"metadata": {
	"name": "<name>bookinfo-reviews" // unique name for each intent
    "description": "connectivity intent for stateless micro-service to stateless micro-service communication"
	"userdata1": <>,
	"userdata2": <>
	}

	"spec": { // update the memory allocation for each field as per OpenAPI standards
	"application": "<app1>",
	"servicename": "httpbin" //actual name of the client service
	"protocol": "HTTP",
	"headless": "false", // default is false. Option "True" will make sure all the instances of the headless service will have access to the client service
	"mutualTLS": "ISTIO_MUTUAL", // Support 2 modes. SIMPLE and ISTIO_MUTUAL, For external Client, it is SIMPLE and MUTUAL (caCertificate required)
	"port" : "80", // port on which service is exposed as through servicemesh, not the port it is actually running on
	"serviceMesh": "istio", // get it from cluster record
	"istio-proxy": "yes", // The features (mTLS, LB, Circuit breaking) are nonot avaialble to services without istio-proxy. Only inbound routing is possible.

	// Traffic configuration - Loadbalancing is applicable per service. The traffic to this service is distrbuted amongst the pods under it.
	"loadbalancingType": "ConsistenHash", // "Simple" and "consistentHash" are the two modes
	"loadBalancerMode": "httpCookie" // Modes for consistentHash - "httpHeaderName", "httpCookie", "useSourceIP", "minimumRingSize", Modes for simple - "LEAST_CONN", "ROUND_ROBIN", "RANDOM", "PASSTHROUGH" // choices of the mode must be explicit
	"httpCookie": "user1" // Name of the cookie to maitain stick sessions

	// Circuit Breaking
	"maxConnections": 10 //connection pool for tcp and http traffic
	"concurrenthttp2Requests": 1000 // concurent http2 requests which can be allowed
	"httpRequestPerConnection": 100 //number of http requests per connection. Valid only for http traffic
	"consecutiveErrors": 8 // Default is 5.  Number of consecutive error before the host is removed from load balancing pool
	"baseEjectionTime" : 15 // Default is 5, time for which the host will be removed from load balancing pool when it returns error for no of times more than "consecutiveErrors" limit
	"intervalSweep": 5m, //time limit before the removed hosts are added back to the load balancing pool.

	// credentials for mTLS. Not required in this scenario since the services are in one logical cloud with common rootCA. ISTIO_MUTUAL is enabled by default.
	"Servicecertificate" : "" // Present actual certificate here.
	"ServicePrivateKey" : "" // Present actual private key here.

	// Access Control
	namespaces: [] // Workloads from this namespaces can access the inbound service
	
	}
}

RETURN STATUS: 201
RETURN BODY: 
{ 
  "name": "servicehttpbin<name>"
  "Message": "inbound service created"
}

Add Clients to inbound service 01

POST - traffic intent to add clients for accessing a specific inbound service

Code Block
languagejs
themeMidnight
titlePOST
linenumberstrue
URL: /v2/projects/{project-name}/composite-apps/{composite-app-name}/{version}/traffic-group-intent/uservice-to-uservice-intent/clients
POST BODY:
{
	"metadata": {
	"name": "<name>" // unique name for each intent
    "description": "connectivity intent add client communication"
	"application": "<app1>",
	"userdata1": <>,
	"userdata2": <>
	}

	spec: {
		"clientServiceName": "sleep", // Name of the client service
		"headless": "false", // default is false. Option "True" will generate the required configs for all the instances of headless service
	}
}

RETURN STATUS: 201
RETURN BODY:
{ 
  "name": "sleep<name>"
  "Message": "Client created"
}

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
languagejs
themeMidnight
titleGET
linenumberstrue
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 Inbound services 02

POST

Code Block
languagejs
themeMidnight
titlePOST
linenumberstrue
URL: /v2/projects/{project-name}/composite-apps/{composite-app-name}/{version}/traffic-intent-set/us-to-us-intents/

POST BODY:
{
	"metadata": {
	"name": "<httpbin>" // unique name for each intent
    "description": "connectivity intent for stateless micro-service to stateless micro-service communication"
	"userdata1": <>,
	"userdata2": <>
	}

	"spec": { // update the memory allocation for each field as per OpenAPI standards
	"application": "<app1>",
	"servicename": "productpage" //actual name of the client service
	"protocol": "HTTP",
	"headless": "false", // default is false. Option "True" will make sure all the instances of the headless service will have access to the client service
	"mutualTLS": "ISTIO_MUTUAL", // Support 2 modes. SIMPLE and ISTIO_MUTUAL, For external Client, it is SIMPLE and MUTUAL (caCertificate required)
	"port" : "80", // port on which service is exposed as through servicemesh, not the port it is actually running on
	"serviceMesh": "istio", // get it from cluster record
	"istio-proxy": "yes", // The features (mTLS, LB, Circuit breaking) are no avaialble to services without istio-proxy. Only inbound routing is possible.

	// Traffic configuration - Loadbalancing is applicable per service. The traffic to this service is distrbuted amongst the pods under it.
	"loadbalancingType": "ConsistenHash", // "Simple" and "consistentHash" are the two modes
	"loadBalancerMode": "httpCookie" // Modes for consistentHash - "httpHeaderName", "httpCookie", "useSourceIP", "minimumRingSize", Modes for simple - "LEAST_CONN", "ROUND_ROBIN", "RANDOM", "PASSTHROUGH" // choices of the mode must be explicit
	"httpCookie": "user1" // Name of the cookie to maitain stick sessions

	// Circuit Breaking
	"maxConnections": 10 //connection pool for tcp and http traffic
	"concurrenthttp2Requests": 1000 // concurent http2 requests which can be allowed
	"httpRequestPerConnection": 100 //number of http requests per connection. Valid only for http traffic
	"consecutiveErrors": 8 // Default is 5.  Number of consecutive error before the host is removed from load balancing pool
	"baseEjectionTime" : 15 // Default is 5, time for which the host will be removed from load balancing pool when it returns error for no of times more than "consecutiveErrors" limit
	"intervalSweep": 5m, //time limit before the removed hosts are added back to the load balancing pool.

	// credentials for mTLS. Not required in this scenario since the services are in one logical cloud with common rootCA. ISTIO_MUTUAL is enabled by default.
	"Servicecertificate" : "" // Present actual certificate here.
	"ServicePrivateKey" : "" // Present actual private key here.

	// Access Control
	namespaces: [] // Workloads from this namespaces can access the inbound service
	
	}
}

RETURN STATUS: 201
RETURN BODY: 
{ 
  "name": "<name>"
  "Message": "inbound service created"
}

Add Client to inbound service 02

Client 01

POST - traffic intent to add clients for accessing a specific inbound service

Code Block
languagejs
themeMidnight
titlePOST
linenumberstrue
URL: /v2/projects/{project-name}/composite-apps/{composite-app-name}/{version}/traffic-group-intent/uservice-to-uservice-intent/clients
POST BODY:
{
	"metadata": {
	"name": "<name>" // unique name for each intent
    "description": "connectivity intent add client communication"
	"application": "<app1>",
	"userdata1": <>,
	"userdata2": <>
	}

	spec: {
		"clientServiceName": "sleep", // Name of the client service
		"headless": "false", // default is false. Option "True" will generate the required configs for all the instances of headless service
	}
}

RETURN STATUS: 201
RETURN BODY:
{ 
  "name": "<name>"
  "Message": "Client 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
languagejs
themeMidnight
titleGET
linenumberstrue
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"
}
Client 02

POST - traffic intent to add clients for accessing a specific inbound service

Code Block
languagejs
themeMidnight
titlePOST
linenumberstrue
URL: /v2/projects/{project-name}/composite-apps/{composite-app-name}/{version}/traffic-group-intent/uservice-to-uservice-intent/clients
POST BODY:
{
	"metadata": {
	"name": "<name>" // unique name for each intent
    "description": "connectivity intent add client communication"
	"application": "<app1>",
	"userdata1": <>,
	"userdata2": <>
	}

	spec: {
		"clientServiceName": "bookinfo-user", // Name of the client service
		"headless": "false", // default is false. Option "True" will generate the required configs for all the instances of headless service
	}
}

RETURN STATUS: 201
RETURN BODY:
{ 
  "name": "<name>"
  "Message": "Client 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
languagejs
themeMidnight
titleGET
linenumberstrue
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"
}

...