Deployment

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

Installing TSA chart on Kubernetes

Preparation

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

  1. Install Kubernetes.

  2. Install Helm client.

  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 TSA 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/tsa --name kaa-tsa

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-tsa                       1/1     Running            0          2m
...

Chart Requirements

Repository Name Version
@kaa service-chart 0.0.82

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.license.existingSecret string "-kaa-license"  
global.monitoring.enabled bool false  
global.nats.url string "" NATS URL.
global.opendistro.password string "admin" Elastic password. Overrides opendistro.password.
global.opendistro.url string "" Elastic URL. Overrides opendistro.url.
global.opendistro.username string "admin" Elastic username. Overrides opendistro.username.
global.waitContainers.curl.image string "dev-hub.kaaiot.net/devops/docker/alpine-curl-jq/alpine-curl-jq"  
global.waitContainers.curl.tag string "0.0.3"  
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//" 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 []  
metadata.component string "backend"  
metadata.partOf string "kaa"  
nameOverride string ""  
nodeSelector object {}  
probes.enabled bool true Enables liveness, readiness, and startup probes for containers.
probes.liveness.initialDelaySeconds int 15  
probes.liveness.periodSeconds int 3  
probes.readiness.initialDelaySeconds int 5  
probes.readiness.periodSeconds int 1  
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 "100m"  
resources.requests.memory string "128Mi"  
runbookUrl string ""  
securityContext object {}  
service.externalIPs list []  
service.loadBalancerIP string ""  
service.port int 80  
service.type string "ClusterIP"  
terminationMessagePolicy string "FallbackToLogsOnError" Kubernetes termination message policy.
tolerations list []  
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 TSA Docker image and provides default values along with descriptions.

Variable name Default value Description  
APP_CONFIG_PATH "/srv/tsa/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".  
ELASTICSEARCH_URL "" Elasticsearch connection URL.  
ELASTICSEARCH_USERNAME "" Elasticsearch connection username.  
ELASTICSEARCH_PASSWORD "" Elasticsearch connection password.  
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.