Deploying another application on Tectonic
This guide outlines deploying a more complicated application on our Tectonic cluster, the Kubernetes Guestbook application, which has three moving parts: a frontend, and two Redis deployments. The guide outlines deploying the app using kubectl and the Tectonic Console, and monitoring the app with the Tectonic Console.
This guide expects you to be familiar with the material covered in Deploying an application on Tectonic and to have a working Tectonic cluster on AWS.
Using kubectl
First, we'll deploy the Guestbook app, using the kubectl CLI and the Tectonic Console.
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First create a directory called guestbook, which may exist anywhere on your system. Then, copy the following YAML files to that directory.
$ mkdir guestbook
Create the following six YAML files, saved to the guestbook directory.
guestbook/redis-master-deployment.yaml
apiVersion: extensions/v1beta1
kind: Deployment
metadata:
name: redis-master
namespace: default
spec:
replicas: 1
template:
metadata:
labels:
k8s-app: redis
role: master
tier: backend
spec:
containers:
- name: master
image: redis
resources:
requests:
cpu: 100m
memory: 100Mi
ports:
- containerPort: 6379
guestbook/redis-master-service.yaml:
apiVersion: v1
kind: Service
metadata:
name: redis-master
namespace: default
labels:
k8s-app: redis
tier: backend
role: master
spec:
ports:
- port: 6379
targetPort: 6379
selector:
k8s-app: redis
tier: backend
role: master
guestbook/redis-slave-deployment.yaml:
apiVersion: extensions/v1beta1
kind: Deployment
metadata:
name: redis-slave
namespace: default
spec:
replicas: 2
template:
metadata:
labels:
k8s-app: redis
role: slave
tier: backend
spec:
containers:
- name: slave
image: gcr.io/google_samples/gb-redisslave:v1
resources:
requests:
cpu: 100m
memory: 100Mi
# Take note of this env section!
env:
- name: GET_HOSTS_FROM
value: dns
ports:
- containerPort: 6379
guestbook/redis-slave-service.yaml:
apiVersion: v1
kind: Service
metadata:
name: redis-slave
namespace: default
labels:
k8s-app: redis
tier: backend
role: slave
spec:
ports:
- port: 6379
selector:
k8s-app: redis
tier: backend
role: slave
guestbook/frontend-deployment.yaml:
apiVersion: extensions/v1beta1
kind: Deployment
metadata:
name: frontend
namespace: default
spec:
replicas: 3
template:
metadata:
labels:
k8s-app: guestbook
tier: frontend
spec:
containers:
- name: php-redis
image: gcr.io/google-samples/gb-frontend:v4
resources:
requests:
cpu: 100m
memory: 100Mi
env:
- name: GET_HOSTS_FROM
value: dns
ports:
- containerPort: 80
guestbook/frontend-service.yaml:
apiVersion: v1
kind: Service
metadata:
name: frontend
namespace: default
labels:
k8s-app: guestbook
tier: frontend
spec:
type: LoadBalancer
ports:
- port: 80
selector:
k8s-app: guestbook
tier: frontend
Launch command:
$ kubectl create -f guestbook/
service "frontend" created
deployment "frontend" created
service "redis-master" created
deployment "redis-master" created
service "redis-slave" created
deployment "redis-slave" created
$ kubectl get deploy/frontend svc/frontend -o wide
NAME CLUSTER-IP EXTERNAL-IP PORT(S) AGE SELECTOR
svc/frontend 10.3.0.175 aaebd8247ef2311e6a045021d1620193-54019671.us-west-2.elb.amazonaws.com 80:31020/TCP 1m k8s-app=guestbook,tier=frontend
NAME DESIRED CURRENT UP-TO-DATE AVAILABLE AGE
deploy/frontend 3 3 3 3 1m
In a browser, navigate to the EXTERNAL-IP address:
Using the Tectonic Console
The Guestbook app can also be deployed using the Tectonic Console.
If you have already deployed the Guestbook app, either delete the deployment using the kubectl CLI, or copy your files, and rename them.
Delete your app from the terminal:
$ kubectl delete deploy/frontend svc/frontend deploy/redis-master svc/redis-master deploy/redis-slave svc/redis-slave
service "frontend" deleted
deployment "frontend" deleted
service "redis-master" deleted
deployment "redis-master" deleted
service "redis-slave" deleted
deployment "redis-slave" deleted
First, create the redis-master deployment by copying and pasting your YAML files into the Tectonic Console.
Go to Workloads > Deployments, and click Create Deployment to copy and paste your three deployment.yaml files into the Console: frontend-deployment.yaml, redis-master-deployment.yaml, and redis-slave-deployment.yaml.
Then, go to Routing > Services and add the Service files: frontend-service.yaml, redis-master-service.yaml, and redis-slave-service.yaml.
Finally, go to the URL listed on the frontend service's Tectonic Console page to see your Guestbook.
Further reading
Now that you have deployed an application on your Tectonic cluster you may find these guides useful:
