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Drawio |
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border | true |
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diagramName | us-to-us intent |
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simpleViewer | false |
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width | |
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links | auto |
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tbstyle | top |
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lbox | true |
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diagramWidth | 15481688 |
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revision | 56 |
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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 service 01
POST - traffic intent for the inbound service (service hosted behind the cluster)
Code Block |
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language | js |
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theme | Midnight |
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title | POST |
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linenumbers | true |
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URL: /v2/projects/{project-name}/composite-apps/{compositeblue-app-name}/{version}/traffic-intent-set/us-to-us-intentsinbound-intent/
POST BODY:
{
"metadata": {
"name": "<>" // 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 - {istioobject - serviceEntry of client's cluster}
"externName": ""
"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": "MUTUAL", // default is simple. Option MUTUAL will enforce mtls {istioobject - destinationRule}
"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
"istiosidecar-proxy": "yes", // The features (mTLS, LB, Circuit breaking) are not avaialbleavailable to services without istio-proxy. Only inbound routing is possible.
traffic-management-info : {
// 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 - {istioobject - destinationRule}
"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 - {istioobject - destinationRule}
"httpCookie": "user1" // Name of the cookie to maitain stick sessions - {istioobject - destinationRule}
// Circuit Breaking
"maxConnections": 10 //connection pool for tcp and http traffic - {istioobject - destinationRule}
"concurrenthttp2Requests": 1000 // concurent http2 requests which can be allowed - {istioobject - destinationRule}
"httpRequestPerConnection": 100 //number of http requests per connection. Valid only for http traffic - {istioobject - destinationRule}
"consecutiveErrors": 8 // Default is 5. Number of consecutive error before the host is removed from load balancing pool - {istioobject - destinationRule}
"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 - {istioobject - destinationRule}
"intervalSweep": 5m, //time limit before the removed hosts are added back to the load balancing pool. - {istioobject - destinationRule}
}
// credentials for mTLS.
"Servicecertificate" : "" // Present actual certificate here.
"ServicePrivateKey" : "" // Present actual private key here.
"caCertificate" : "" // present the trusted certificate to verify the client connection, Required only when mtls mode is MUTUAL
// Access Control
namespaces: [] // Workloads from this namespaces can access the inbound service - {istioobject - authorizationPolicy}
}
}
RETURN STATUS: 201
RETURN BODY:
{
"name": "<name>"
"Message": "inbound service created"
} |
...
Add Security detail for a client of inbound service 01
WARNING - This task requires mutual TLS enabled because the following examples use principal and namespace in the policies
Code Block |
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language | js |
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theme | Midnight |
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title | GET |
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linenumbers | true |
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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"]} // {istioobject - authorizationPolicy, will be applied for the inbound service}
}
}
RETURN STATUS: 201
RETURN BODY:
{
"name": "<name>"
"Message": "Security Rule created"
}
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Add another Security detail for a client of inbound service 01
WARNING - This task requires mutual TLS enabled because the following examples use principal and namespace in the policies
Code Block |
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language | js |
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theme | Midnight |
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title | GET |
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linenumbers | true |
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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": "/headers"]} // {istioobject - authorizationPolicy, will be applied for the inbound service}
}
}
RETURN STATUS: 201
RETURN BODY:
{
"name": "<name>"
"Message": "Security Rule created"
}
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...
Add Security detail 01 for client 01
WARNING - This task requires mutual TLS enabled because the following examples use principal and namespace in the policies
Code Block |
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language | js |
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theme | Midnight |
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title | GET |
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linenumbers | true |
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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"}} // {istioobject - authorizationPolicy, will be applied for the inbound service}
}
}
RETURN STATUS: 201
RETURN BODY:
{
"name": "<name>"
"Message": "Security Rule created"
}
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Add Security detail 02 for client 01
WARNING - This task requires mutual TLS enabled because the following examples use principal and namespace in the policies
Code Block |
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language | js |
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theme | Midnight |
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title | GET |
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linenumbers | true |
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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"}} // {istioobject - authorizationPolicy, will be applied for the inbound service}
}
}
RETURN STATUS: 201
RETURN BODY:
{
"name": "<name>"
"Message": "Security Rule created"
}
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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 |
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language | js |
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theme | Midnight |
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title | GET |
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linenumbers | true |
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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"}}, // {istioobject - authorizationPolicy, will be applied for the inbound service}
}
}
RETURN STATUS: 201
RETURN BODY:
{
"name": "<name>"
"Message": "Security Rule created"
}
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...
Code Block |
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language | yml |
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theme | Eclipse |
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title | ServiceEntry |
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linenumbers | true |
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apiVersion: networking.istio.io/v1alpha3
kind: ServiceEntry
metadata:
name: service-entry-httpbin
namespace: namespace01 <> // namespace where the client service are deployed
spec:
hosts:
- httpbin.namespace02<namespace_of_service>.logicalcloud02
# 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 // IP of the istio-ingress-gateway
ports:
http1: 15443 //Sni. Do not change this
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...
Code Block |
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language | yml |
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theme | Eclipse |
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title | DestinationRule |
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linenumbers | true |
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apiVersion: networking.istio.io/v1alpha3
kind: DestinationRule
metadata:
name: sleep-dr
namespace: default<namespace_of_sleep>
spec:
host: "sleep.namespace01.svc.cluster.local"
trafficPolicy:
tls:
mode: MUTUAL
serverCertificate: /etc/certs/cert-chain.pem
privateKey: /etc/certs/key.pem
caCertificates: /etc/certs/root-cert.pem
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...
Code Block |
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language | yml |
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theme | Eclipse |
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title | DestinationRule |
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linenumbers | true |
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apiVersion: networking.istio.io/v1alpha3
kind: DestinationRule
metadata:
name: bookinfo-productpage-dr
namespace: default<namespace_of_productpage>
spec:
host: "productpage.namespace02.svc.cluster.local"
trafficPolicy:
tls:
mode: MUTUAL
serverCertificate: /etc/certs/cert-chain.pem
privateKey: /etc/certs/key.pem
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
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...
Code Block |
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language | yml |
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theme | Eclipse |
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title | AuthorizationPolicy |
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linenumbers | true |
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apiVersion: security.istio.io/v1beta1
kind: AuthorizationPolicy
metadata:
name: deny-all
namespace: default<namespace_of_prodfuct-page>
spec:
selector:
matchLabels:
app: <name_used_for_productpage>
rules:
- from:
- source:
principals: ["cluster.global/ns/default/sa/sleep", "cluster.global/ns/default/sa/bookinfo-user" ]
to:
- operation:
methods: ["GET"]
paths: ["/static*"]
- operation:
methods: ["GET"]
paths: ["/api/v1/products"]
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...
Code Block |
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language | yml |
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theme | Eclipse |
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title | DestinationRule |
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linenumbers | true |
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apiVersion: networking.istio.io/v1alpha3
kind: DestinationRule
metadata:
name: sleep-dr
namespace: namespace01
spec:
host: "bookinfo-user"
trafficPolicy:
tls:
mode: MUTUAL
serverCertificate: /etc/certs/cert-chain.pem
privateKey: /etc/certs/key.pem
caCertificates: /etc/certs/root-cert.pem
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4. DestinationRule for simple TLS, Loadbalancing and circuit breaking for httpbin - (logicalCloud02)
Code Block |
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language | yml |
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theme | Eclipse |
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title | DestinationRule |
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linenumbers | true |
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apiVersion: networking.istio.io/v1alpha3
kind: DestinationRule
metadata:
name: httpbin-dr
namespace: namespace02
spec:
host: "httpbin"
trafficPolicy:
tls:
mode: MUTUAL
serverCertificate: /etc/certs/cert-chain.pem
privateKey: /etc/certs/key.pem
caCertificates: /etc/certs/root-cert.pem
loadbalancer:
consistentHash:
httpCookie: "user1"
connectionPool:
tcp:
maxConnections: 10
http:
http2MaxRequests: 1000
maxRequestsPerConnection: 100
outlierDetection:
consecutiveErrors: 7
interval: 5m
baseEjectionTime: 15m
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...