Deployment

All Kaa services, including Tekton, are distributed as Helm charts. You can run these charts using Kubernetes.

Installing Tekton chart on Kubernetes

Preparation

These steps should be done once for your entire Kaa cluster in Kubernetes.

  1. Install Kubernetes.

  2. Install Helm client and Tiller server.

  3. Create a Kaa license secret (remember to put in your Kaa license key file contents and password):

     export HISTCONTROL=ignorespace # Prevent saving your key password in the shell history; note the leading space in the next line
      cat << EOF > /tmp/kaa-licence.yaml
     apiVersion: v1
     data:
       file: < your licence key file contents, base64-encoded >
       password: < your licence key password >
     kind: Secret
     metadata:
       name: license
       type: Opaque
     EOF
     kubectl create -f /tmp/kaa-licence.yaml
    
  4. Specify the image pull secret for the official KaaIoT docker registry. To define this secret, use your KaaID credentials:

     export HISTCONTROL=ignorespace  # Prevent saving your credentials in the shell history; note the leading space in the next line
      export KAAID_EMAIL=<your KaaID email, eg. bob@example.com> KAAID_PASSWORD=<your KaaID password>
     kubectl create secret docker-registry kaaid --docker-server=dev-hub.kaaiot.net --docker-username=$KAAID_EMAIL --docker-email=$KAAID_EMAIL --docker-password=$KAAID_PASSWORD
    
  5. If you want to enable API security in your Kaa cluster (recommended), you should create an auth server backend secret for the service to be able to request PAT tokens.

     export HISTCONTROL=ignorespace # Prevent saving your client ID amd secret in the shell history; note the leading space in the next line
      cat << EOF > /tmp/keycloak-backend-secret.yaml
     apiVersion: v1
     data:
       client-id: < your client-id, base64-encoded >
       client-secret: < your client-secret, base64-encoded >
     kind: Secret
     metadata:
       name: "keycloak-backend"
       labels:
         app.kubernetes.io/name: "kaa-name"
         helm.sh/chart: "kaa-chart-version"
         app.kubernetes.io/instance: "kaa-instance-name"
         app.kubernetes.io/managed-by: "release-service-name"
     EOF
     kubectl create -f /tmp/keycloak-backend-secret.yaml
    
  6. Add the KaaIoT Helm repository:

     helm repo add kaa-museum https://museum.kaaiot.net/
    

Installation

Once you have completed the preparation steps, everything is ready for deploying Tekton on your Kubernetes cluster. To deploy the service, run the following command (observe the reference to the previously created license secret):

helm install --set global.license.secretName=license kaa-museum/tekton --name kaa-tekton

Check that pods are running:

kubectl get pods

Once the service initialization is complete, you should observe the output similar to the below:

NAME                                          READY   STATUS             RESTARTS   AGE
...
kaa-tekton                                       1/1     Running            0          2m
...

Chart Requirements

Repository Name Version
@stable mongodb 4.0.5
@stable nats 2.0.6

Chart Values

Key Type Default Description
affinity object {}  
annotations.deployment object {}  
annotations.pod object {}  
config string "" Content for the service config map, automatically mounted as a config file into the pod.
env object {} Defines the environment variables that Kubernetes passes to the service replica.
extraPodSpecs.automountServiceAccountToken bool false  
fullnameOverride string ""  
global.image.pullSecrets list [] List of image pull secret names. Each must be defined as a record with the name field. Overrides image.pullSecrets.
global.keycloak.backendSecretName string "" Name of the backend auth server secret, which must contain base64-encoded client-id and client-secret. Required.
global.keycloak.baseUrl string "" Auth provider base URL. Required.
global.keycloak.enabled string "" Enables API security using the auth provider. Overrides keycloak.enabled.
global.license.secretName string "" Name of the license secret, which must contain two base64-encoded fields: file (license file contents in PKCS #12) and password. Overrides license.secretName.
global.mongodb.url string "" Mongodb URL. Overrides mongodb.url.
global.monitoring.enabled bool false Monitoring status
global.nats.url string "" NATS URL. Overrides nats.url.
global.tenantManager.baseUrl string "" Tenant manager base URL.
global.tenantManager.enabled string "" Enables multitenancy using the Kaa Tenant Manager. Overrides tenantManager.enabled.
image.pullPolicy string "IfNotPresent" Docker image pull policy.
image.pullSecrets list [] List of image pull secret names. Each must be defined as a record with the name field.
image.repository string "dev-hub.kaaiot.net/core/service/tekton/tekton" Docker image repository image URL.
image.tag string "" Docker image tag version to pull and run.
ingress.annotations object {}  
ingress.enabled bool false  
ingress.hosts[0] string "chart-example.local"  
ingress.paths list []  
ingress.tls list []  
keycloak.enabled string "" Enables API security using the auth provider.
license.secretName string "" Name of the license secret, which must contain two base64-encoded fields: file (license file contents in PKCS #12) and password.
metadata.component string "backend"  
metadata.partOf string "kaa"  
mongodb.enabled bool true For detailed info look in https://github.com/helm/charts/tree/master/stable/mongodb
mongodb.image.pullPolicy string "IfNotPresent"  
mongodb.image.tag string "3.6.10"  
mongodb.persistence.enabled bool false  
mongodb.resourses.requests.cpu string "300m"  
mongodb.url string "mongodb://-:27017" Mongodb URL.
mongodb.urlOverride string "" Mongodb URL. Overrides global.mongodb.url and mongodb.url .
mongodb.usePassword bool false  
nameOverride string ""  
nats.auth.enabled bool false  
nats.enabled bool true Enables NATS dependency. For detailed info refer https://github.com/helm/charts/tree/master/stable/nats.
nats.url string "nats://-nats-client:4222" NATS URL.
nats.urlOverride string "" NATS URL. Overrides global.nats.url and nats.url.
nodeSelector object {}  
probes.enabled bool true Enables liveness, readiness, and startup probes for containers.
probes.liveness.initialDelaySeconds int 60  
probes.liveness.periodSeconds int 15  
probes.liveness.timeout int 10  
probes.readiness.periodSeconds int 15  
probes.readiness.timeout int 10  
replicaCount int 1 The number of service instance replicas to run.
resources.limits.cpu int 1  
resources.limits.memory string "512Mi"  
resources.requests.cpu string "200m"  
resources.requests.memory string "128Mi"  
securityContext object {}  
service.externalIPs list []  
service.loadBalancerIP string ""  
service.port int 80  
service.type string "ClusterIP"  
tenantManager.enabled string "" Enables multitenancy using the Kaa Tenant Manager.
terminationMessagePolicy string "FallbackToLogsOnError" Kubernetes termination message policy.
tolerations list []  
updateStrategy.type string "RollingUpdate" Deployment update strategy.
waitContainers.curl.image string "dev-hub.kaaiot.net/devops/docker/alpine-curl-jq/alpine-curl-jq"  
waitContainers.curl.tag string "0.0.2"  
waitContainers.enabled bool true Wait for dependency services.
waitContainers.timeout int 300 Wait timeout for dependency services in seconds.

The keys with no description are standard Kubernetes values. Refer to the official Kubernetes documentation for more information on these.

Environment variables

The table below summarizes the variables supported by the Tekton Docker image and provides default values along with descriptions.

Variable name Default value Description
APP_CONFIG_PATH "/srv/tekton/service-config.yml" Path to the service configuration YAML file inside container. In case of running in Kubernetes, consider using K8s Volumes for externalization.
NATS_URLS "nats://nats:4222" NATS connection URLs. May include connection credentials, e.g. "nats://derek:pass@localhost:4222".
KAA_LICENSE_CERT_PATH "/run/license/license.p12" Path to the Kaa platform license certificate file in PKCS #12 format.
KAA_LICENSE_CERT_PASSWORD   License certificate password. Required.
KAA_MONGODB_URL "mongodb://mongodb:27017" MongoDB URL.
KAA_MONGODB_NAME "tekton" MongoDB database name.
KAA_MONGODB_USER   MongoDB username.
KAA_MONGODB_PASSWORD   MongoDB password.
KAA_SECURITY_ENABLED false Enables authentication and authorization on REST API endpoints (inbound and outbound API calls).
KAA_SECURITY_ISSUER   OAuth 2.0 issuer URL for the system tenant (“kaa”).
KAA_SECURITY_CLIENT_ID   Client ID for making requests in the system tenant scope.
KAA_SECURITY_CLIENT_SECRET   Client secret for making requests in the system tenant scope.
KAA_SECURITY_MULTITENANCY_ENABLED false Enables multitenancy via integration with the Kaa Tenant Manager. Only effective when kaa.security.enabled is set to true.
KAA_SECURITY_MULTITENANCY_TENANT_MANAGER_URL "http://tenant-manager" URL of the Kaa Tenant Manager that provides security configurations for tenants.
KAA_LICENSE_CERT_PATH "/run/license/license.p12" Path to the Kaa platform license certificate file in PKCS #12 format.
KAA_LICENSE_CERT_PASSWORD   License certificate password. Required.
SERVICE_DEBUG false Enables debug level logging.

Some of the listed above settings can also be controlled via the configuration options. When set, environment variables take precedence over corresponding configuration file settings.