README.md

Deployment

Deployment
Imperative commands for deployment
Tips and Tricks

For simulated Practice problems visit KillerCoda.

1. create a deployment with nginx:1.18.0 image with 2 replicas, in the default namespace, expose port 80 on the containers.

   Solution

   #generate yaml file
   k create deploy nginx --image=nginx:1.18.0 --replicas=2 --dry-run=client -o yaml > deploy.yaml
   
   #update pod.yaml
   apiVersion: apps/v1
   kind: Deployment
   metadata:
     creationTimestamp: null
     labels:
       app: nginx
     name: nginx
   spec:
     replicas: 2
     selector:
       matchLabels:
         app: nginx
     strategy: {}
     template:
       metadata:
         creationTimestamp: null
         labels:
           app: nginx
       spec:
         containers:
         - image: nginx:1.18.0
           name: nginx
           ports:
             - containerPort: 80
           resources: {}
   status: {}
   
   
   # create deployment
   k create -f deploy.yaml

2. update the nginx deployment to use image nginx:1.19.8.

   Solution

   #update the deployment
   k edit deploy nginx 
   # then edit the container image
   
   OR
   
   # set new image on the deployment
   k set image deploy nginx nginx=nginx:1.19.8

3. Rollback image nginx:1.19.8 update to nginx:1.18.0 on the nginx deployment.

   Solution

   #update the deployment
   k rollout undo deploy nginx
   # then edit the container image
   
   OR
   
   # set new image on the deployment
   k set image deploy nginx nginx=nginx:1.18.0

4. Update replicas on nginx deployment to 5.

   Solution

   #update the replicas
   k scale deploy nginx --replicas=5
   
   OR
   
   # edit the deploy & set the replicas
   k edit deploy nginx 

5. Set horizontal autoscaling on the nginx deployment to have min of 5 pods and max of 10 pods.

   Solution

   #update the replicas
   k autoscale deploy nginx --min=5 --max=10
   
   # check the horizontal auto scaler
   k get hpa nginx