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Pattern 4: Helm Chart for Distributed API-M Deployment with Traffic Manager Separated from the Control Plane

Resources for building a Helm chart for deployment of a simple scalable deployment of WSO2 API Manager.

WSO2 API Manager pattern 4 deployment

For advanced details on the deployment pattern, please refer to the official documentation.

Contents

Prerequisites

  • WSO2 product Docker images used for the Kubernetes deployment.

    WSO2 product Docker images available at DockerHub package General Availability (GA) versions of WSO2 products with no WSO2 Updates.

    For a production grade deployment of the desired WSO2 product-version, it is highly recommended to use the relevant Docker image which packages WSO2 Updates, available at WSO2 Private Docker Registry. In order to use these images, you need an active WSO2 Subscription.

  • Install Git, Helm and Kubernetes client in order to run the steps provided in the following quick start guide.

  • An already setup Kubernetes cluster.

  • Install NGINX Ingress Controller.

  • Add the WSO2 Helm chart repository.

     helm repo add wso2 https://helm.wso2.com && helm repo update

Quick Start Guide

1. Install the Helm Chart

You can install the relevant Helm chart either from WSO2 Helm Chart Repository or by source.

Note:

  • NAMESPACE should be the Kubernetes Namespace in which the resources are deployed.

Install Chart From WSO2 Helm Chart Repository

Helm version 2

helm install --name <RELEASE_NAME> wso2/am-pattern-4 --version 4.2.0-1 --namespace <NAMESPACE>

Helm version 3

  • Deploy the Kubernetes resources using the Helm Chart

    helm install <RELEASE_NAME> wso2/am-pattern-4 --version 4.2.0-1 --namespace <NAMESPACE> --create-namespace

The above steps will deploy the deployment pattern using WSO2 product Docker images available in WSO2 Private Docker Registry. Please provide your WSO2 Subscription credentials via input values (using --set argument).

Please see the following example.

 helm install --name <RELEASE_NAME> wso2/am-pattern-4 --version 4.2.0-1 --namespace <NAMESPACE> --set wso2.subscription.username=<SUBSCRIPTION_USERNAME> --set wso2.subscription.password=<SUBSCRIPTION_PASSWORD>

If you are using a custom WSO2 Docker images you will need to provide those information via the input values. Please refer API Manager Server Configurations and Micro Integrator Server Configurations

Install Chart From Source

In the context of this document,

  • KUBERNETES_HOME will refer to a local copy of the wso2/kubernetes-apim Git repository.
  • HELM_HOME will refer to <KUBERNETES_HOME>/advanced.
Clone the Helm Resources for WSO2 API Manager Git repository.
git clone https://github.com/wso2/kubernetes-apim.git
Deploy Helm chart for WSO2 API Manager Pattern 4 deployment.

Helm version 2

helm install --dep-up --name <RELEASE_NAME> <HELM_HOME>/am-pattern-4 --namespace <NAMESPACE>

Helm version 3

  • Deploy the Kubernetes resources using the Helm Chart

    helm install <RELEASE_NAME> <HELM_HOME>/am-pattern-4 --namespace <NAMESPACE> --dependency-update --create-namespace

The above steps will deploy the deployment pattern using WSO2 product Docker images available in WSO2 Private Docker Registry. Please provide your WSO2 Subscription credentials via input values (using --set argument).

Please see the following example.

 helm install --name <RELEASE_NAME> <HELM_HOME>/am-pattern-4 --namespace <NAMESPACE> --set wso2.subscription.username=<SUBSCRIPTION_USERNAME> --set wso2.subscription.password=<SUBSCRIPTION_PASSWORD>

If you are using a custom WSO2 Docker images you will need to provide those information via the input values. Please refer API Manager Server Configurations and Micro Integrator Server Configurations

Or else, you can configure the default configurations inside the am-pattern-4 helm chart values.yaml file. Refer this for to learn more details about the values.yaml file.

Note:
From the above Helm commands, base image of a Micro Integrator is deployed (without any integration solution). To deploy your integration solution with the Helm charts follow the below steps.

  1. Create an integration service using WSO2 Integration Studio and expose it as a Managed API. Then create a Docker image and push it to your private or public Docker registry.

    - INTEGRATION_IMAGE_REGISTRY will refer to the Docker registry that created Docker image has been pushed
    - INTEGRATION_IMAGE_NAME will refer to the name of the created Docker image
    - INTEGRATION_IMAGE_TAG will refer to the tag of the created Docker image

  2. If your Docker registry is a private registry, create an imagePullSecret.

    - IMAGE_PULL_SECRET will refer to the created image pull secret

  3. Deploy the helm resource using following command.

helm install <RELEASE_NAME> wso2/am-pattern-4 --version 4.2.0-1 --namespace <NAMESPACE> --set wso2.deployment.mi.dockerRegistry=<INTEGRATION_IMAGE_REGISTRY> --set wso2.deployment.mi.imageName=<INTEGRATION_IMAGE_NAME> --set wso2.deployment.mi.imageTag=<INTEGRATION_IMAGE_TAG> --set wso2.deployment.mi.imagePullSecrets=<IMAGE_PULL_SECRET>

Note: If you are using Rancher Desktop for the Kubernetes cluster, add the following changes.

  1. Change storageClass to local-path in values.yaml.
  2. Change accessModes in Persistent Volume Claims to ReadWriteOnce.

Choreo Analytics

If you need to enable Choreo Analytics with WSO2 API Manager, please follow the documentation on Register for Analytics to obtain the on-prem key for Analytics.

The following example shows how to enable Analytics with the helm charts.

Helm v2

helm install --name <RELEASE_NAME> wso2/am-pattern-4 --version 4.2.0-1 --namespace <NAMESPACE> --set wso2.choreoAnalytics.enabled=true --set wso2.choreoAnalytics.endpoint=<CHOREO_ANALYTICS_ENDPOINT> --set wso2.choreoAnalytics.onpremKey=<ONPREM_KEY>

Helm v3

helm install <RELEASE_NAME> wso2/am-pattern-4 --version 4.2.0-1 --namespace <NAMESPACE> --set wso2.choreoAnalytics.enabled=true --set wso2.choreoAnalytics.endpoint=<CHOREO_ANALYTICS_ENDPOINT> --set wso2.choreoAnalytics.onpremKey=<ONPREM_KEY> --create-namespace

You will be able to see the Analytics data when you log into Choreo Analytics Portal.

2. Obtain the external IP

Obtain the external IP (EXTERNAL-IP) of the API Manager Ingress resources, by listing down the Kubernetes Ingresses.

kubectl get ing -n <NAMESPACE>

The output under the relevant column stands for the following.

API Manager Control Plane

  • NAME: Metadata name of the Kubernetes Ingress resource (defaults to wso2am-pattern-4-am-cp-ingress)
  • HOSTS: Hostname of the WSO2 API Manager's Control Plane service (<wso2.deployment.am.cp.ingress.hostname>)
  • ADDRESS: External IP (EXTERNAL-IP) exposing the API Manager's Control Plane service to outside of the Kubernetes environment
  • PORTS: Externally exposed service ports of the API Manager's Control Plane service

API Manager Gateway

  • NAME: Metadata name of the Kubernetes Ingress resource (defaults to wso2am-pattern-4-am-gateway-ingress)
  • HOSTS: Hostname of the WSO2 API Manager's Gateway service (<wso2.deployment.am.gateway.ingress.hostname>)
  • ADDRESS: External IP (EXTERNAL-IP) exposing the API Manager's Gateway service to outside of the Kubernetes environment
  • PORTS: Externally exposed service ports of the API Manager's Gateway service

API Manager Websub

  • NAME: Metadata name of the Kubernetes Ingress resource (defaults to wso2am-pattern-4-am-websub-ingress)
  • HOSTS: Hostname of the WSO2 API Manager's Websub service (<wso2.deployment.am.websub.ingress.hostname>)
  • ADDRESS: External IP (EXTERNAL-IP) exposing the API Manager's Websub service to outside of the Kubernetes environment
  • PORTS: Externally exposed service ports of the API Manager's Websub service

Micro Integrator Management APIs

  • NAME: Metadata name of the Kubernetes Ingress resource (defaults to wso2am-pattern-4-mi-1-management-ingress)
  • HOSTS: Hostname of the WSO2 Micro Integrator service (<wso2.deployment.mi.ingress.management.hostname>)
  • ADDRESS: External IP (EXTERNAL-IP) exposing the Micro Integrator service to outside of the Kubernetes environment PORTS: Externally exposed service ports of the Micro Integrator service

3. Add a DNS record mapping the hostnames and the external IP

If the defined hostnames (in the previous step) are backed by a DNS service, add a DNS record mapping the hostnames and the external IP (EXTERNAL-IP) in the relevant DNS service.

If the defined hostnames are not backed by a DNS service, for the purpose of evaluation you may add an entry mapping the hostnames and the external IP in the /etc/hosts file at the client-side.

4. Access Management Consoles

  • API Manager Publisher: https://<wso2.deployment.am.cp.ingress.hostname>/publisher

  • API Manager DevPortal: https://<wso2.deployment.am.cp.ingress.hostname>/devportal

Configuration

The following tables lists the configurable parameters of the chart and their default values.

WSO2 Subscription Configurations
Parameter Description Default Value
wso2.subscription.username Your WSO2 Subscription username -
wso2.subscription.password Your WSO2 Subscription password -
wso2.choreoAnalytics.enabled Chorero Analytics enabled or not false
wso2.choreoAnalytics.endpoint Choreo Analytics endpoint https://analytics-event-auth.choreo.dev/auth/v1
wso2.choreoAnalytics.onpremKey On-prem key for Choreo Analytics -

If you do not have an active WSO2 subscription, do not change the parameters wso2.subscription.username and wso2.subscription.password.

Chart Dependencies
Parameter Description Default Value
wso2.deployment.dependencies.mysql Enable the deployment and usage of WSO2 API Management MySQL based Helm Chart true
wso2.deployment.dependencies.nfsProvisioner Enable the deployment and usage of NFS Server Provisioner (https://github.com/helm/charts/tree/master/stable/nfs-server-provisioner) true
Persistent Runtime Artifact Configurations
Parameter Description Default Value
wso2.deployment.persistentRuntimeArtifacts.storageClass Appropriate Kubernetes Storage Class nfs
wso2.deployment.persistentRuntimeArtifacts.sharedArtifacts.capacity.executionPlans Capacity for execution plans shared between the Traffic Manager profile instances 20M
wso2.deployment.persistentRuntimeArtifacts.sharedArtifacts.capacity.synapseConfigs Capacity for synapse artifacts of APIs shared between the Gateway profile instances 50M
wso2.deployment.persistentRuntimeArtifacts.apacheSolrIndexing.enabled Indicates if persistence of the runtime artifacts for Apache Solr-based indexing is enabled false
wso2.deployment.persistentRuntimeArtifacts.apacheSolrIndexing.capacity.carbonDatabase Capacity for persisting the H2 based local Carbon database file 50M
wso2.deployment.persistentRuntimeArtifacts.apacheSolrIndexing.capacity.solrIndexedData Capacity for persisting the Apache Solr indexed data 50M
API Manager Server Configurations
Parameter Description Default Value
wso2.deployment.am.dockerRegistry Registry location of the Docker image to be used to create API Manager instances -
wso2.deployment.am.imageName Name of the Docker image to be used to create API Manager instances wso2am
wso2.deployment.am.imageTag Tag of the image used to create API Manager instances 4.2.0
wso2.deployment.am.imagePullPolicy Refer to doc Always
wso2.deployment.am.resources.requests.memory The minimum amount of memory that should be allocated for running API Manager product profiles with profile optimization 1Gi
wso2.deployment.am.resources.requests.cpu The minimum amount of CPU that should be allocated for running API Manager product profiles with profile optimization 1000m
wso2.deployment.am.resources.limits.memory The maximum amount of memory that should be allocated for running API Manager product profiles with profile optimization 2Gi
wso2.deployment.am.resources.limits.cpu The maximum amount of CPU that should be allocated for running API Manager product profiles with profile optimization 2000m
wso2.deployment.am.livenessProbe.initialDelaySeconds Initial delay for the live-ness probe for API Manager optimized profile 60
wso2.deployment.am.livenessProbe.periodSeconds Period of the live-ness probe for API Manager optimized profile 10
wso2.deployment.am.readinessProbe.initialDelaySeconds Initial delay for the readiness probe for API Manager optimized profile 60
wso2.deployment.am.readinessProbe.periodSeconds Period of the readiness probe for API Manager optimized profile 10
wso2.deployment.am.websub.ingress.enabled If enabled, create ingress resource for WebSub service true
wso2.deployment.am.websub.ingress.hostname Hostname for API Manager WebSub service websub.am.wso2.com
wso2.deployment.am.websub.ingress.annotations Ingress resource annotations for API Manager WebSub Community NGINX Ingress controller annotations
wso2.deployment.am.gateway.ingress.enabled If enabled, create ingress resource for API Manager Gateway true
wso2.deployment.am.gateway.ingress.hostname Hostname for API Manager Gateway gateway.am.wso2.com
wso2.deployment.am.gateway.ingress.annotations Ingress resource annotations for API Manager Gateway Community NGINX Ingress controller annotations
wso2.deployment.am.gateway.replicas Number of replicas of API Manager Gateway to be started 2
wso2.deployment.am.gateway.strategy.rollingUpdate.maxSurge Refer to doc 2
wso2.deployment.am.gateway.strategy.rollingUpdate.maxUnavailable Refer to doc 0
wso2.deployment.am.gateway.config Custom deployment configuration file for Gateway profile (<WSO2AM>/repository/conf/deployment.toml) -
wso2.deployment.am.cp.livenessProbe.initialDelaySeconds Initial delay for the live-ness probe for API Manager Control Plane profile 60
wso2.deployment.am.cp.livenessProbe.periodSeconds Period of the live-ness probe for API Manager Control Plane profile 10
wso2.deployment.am.cp.readinessProbe.initialDelaySeconds Initial delay for the readiness probe for API Manager Control Plane profile 60
wso2.deployment.am.cp.readinessProbe.periodSeconds Period of the readiness probe for API Manager Control Plane profile 10
wso2.deployment.am.cp.ingress.enabled If enabled, create ingress resource for API Manager management consoles true
wso2.deployment.am.cp.ingress.hostname Hostname for API Manager Control Plane am.wso2.com
wso2.deployment.am.cp.ingress.annotations Ingress resource annotations for API Manager Control Plane Community NGINX Ingress controller annotations
wso2.deployment.am.cp.resources.requests.memory The minimum amount of memory that should be allocated for running API Manager API Manager Control Plane 1Gi
wso2.deployment.am.cp.resources.requests.cpu The minimum amount of CPU that should be allocated for running API ManagerAPI Manager Control Plane 1000m
wso2.deployment.am.cp.resources.limits.memory The maximum amount of memory that should be allocated for running API Manager API Manager Control Plane 2Gi
wso2.deployment.am.cp.resources.limits.cpu The maximum amount of CPU that should be allocated for running API Manager API Manager Control Plane 2000m
wso2.deployment.am.cp.config Custom deployment configuration file for Control Plane profile (<WSO2AM>/repository/conf/deployment.toml) -
wso2.deployment.am.trafficmanager.livenessProbe.initialDelaySeconds Initial delay for the live-ness probe for API Manager Traffic Manager profile 180
wso2.deployment.am.trafficmanager.livenessProbe.periodSeconds Period of the live-ness probe for API Manager Traffic manager profile 10
wso2.deployment.am.trafficmanager.readinessProbe.initialDelaySeconds Initial delay for the readiness probe for API Manager Control Plane profile 180
wso2.deployment.am.trafficmanager.readinessProbe.periodSeconds Period of the readiness probe for API Manager Control Plane profile 10
wso2.deployment.am.trafficmanager.replicas Number of replicas of API Manager Traffic Manager to be started 2
wso2.deployment.am.trafficmanager.resources.requests.memory The minimum amount of memory that should be allocated for running API Manager Traffic Manager 2Gi
wso2.deployment.am.trafficmanager.resources.requests.cpu The minimum amount of CPU that should be allocated for running API Manager Traffic Manager 2000m
wso2.deployment.am.trafficmanager.resources.limits.memory The maximum amount of memory that should be allocated for running API Manager Traffic Manager 3Gi
wso2.deployment.am.trafficmanager.resources.limits.cpu The maximum amount of CPU that should be allocated for running API Manager Traffic Manager 3000m
wso2.deployment.am.trafficmanager.resources.jvm.heap.memory.xms The minimum Resource allocation for the Java Heap size for running API Manager Traffic Manager 1024m
wso2.deployment.am.trafficmanager.resources.jvm.heap.memory.xmx The maximum Resource allocation for the Java Heap size for running API Manager Traffic Manager 1024m
Micro Integrator Server Configurations
Parameter Description Default Value
wso2.deployment.mi.dockerRegistry Registry location of the Docker image to be used to create Micro Integrator instances -
wso2.deployment.mi.imageName Name of the Docker image to be used to create API Manager instances wso2mi
wso2.deployment.mi.imageTag Tag of the image used to create API Manager instances 4.2.0
wso2.deployment.mi.imagePullPolicy Refer to doc Always
wso2.deployment.mi.livenessProbe.initialDelaySeconds Initial delay for the live-ness probe for Micro Integrator node 35
wso2.deployment.mi.livenessProbe.periodSeconds Period of the live-ness probe for Micro Integrator node 10
wso2.deployment.mi.readinessProbe.initialDelaySeconds Initial delay for the readiness probe for Micro Integrator node 35
wso2.deployment.mi.readinessProbe.periodSeconds Period of the readiness probe for Micro Integrator node 10
wso2.deployment.mi.resources.requests.memory The minimum amount of memory that should be allocated for a Pod 512Mi
wso2.deployment.mi.resources.requests.cpu The minimum amount of CPU that should be allocated for a Pod 500m
wso2.deployment.mi.resources.limits.memory The maximum amount of memory that should be allocated for a Pod 1Gi
wso2.deployment.mi.resources.limits.cpu The maximum amount of CPU that should be allocated for a Pod 1000m
wso2.deployment.mi.config Custom deployment configuration file (<WSO2MI>/conf/deployment.toml) -
wso2.deployment.mi.ingress.management.hostname Hostname for Micro Integrator management apis management.mi.wso2.com
wso2.deployment.mi.ingress.management.annotations Ingress resource annotations for API Manager Gateway Community NGINX Ingress controller annotations

Note: The above mentioned default, minimum resource amounts for running WSO2 API Manager server profiles are based on its official documentation.

Kubernetes Specific Configurations

Parameter Description Default Value
kubernetes.serviceAccount Name of the Kubernetes Service Account to which the Pods are to be bound `wso2am-pattern-4-
svc-account`

Runtime Artifact Persistence and Sharing

  • It is mandatory to set an appropriate Kubernetes StorageClass in this deployment, for persistence and sharing.

  • By default, this deployment uses the nfs Kubernetes StorageClass created using the official, stable NFS Server Provisioner.

  • Only persistent storage solutions supporting ReadWriteMany access mode are applicable for wso2.deployment.persistentRuntimeArtifacts.storageClass.

  • Please refer to the official WSO2 container guide for advanced details with regards to WSO2 recommended, storage options.

Managing Java Keystores and Truststores

  • By default, this deployment uses the default keystores and truststores provided by the relevant WSO2 product.

  • For advanced details with regards to managing custom Java keystores and truststores in a container based WSO2 product deployment please refer to the official WSO2 container guide.

Configuring SSL in Service Exposure

  • For WSO2 recommended best practices in configuring SSL when exposing the internal product services to outside of the Kubernetes cluster, please refer to the official WSO2 container guide.

Setting up API Manager without Micro Integrator

If you want to setup API Manager only without Micro Integrator, you have to install the charts from source after removing MI templates.

  • Clone the repository

    git clone https://github.com/wso2/kubernetes-apim.git

  • Remove the MI templates by removing the mi folder in <KUBERNETES_HOME>/advanced/am-pattern-4/templates/.

  • Deploy Helm charts

    helm install <RELEASE_NAME> <HELM_HOME>/am-pattern-4 --version 4.2.0-1 --namespace <NAMESPACE> --dependency-update --create-namespace