Sidecar Pattern

3.5 Sidecar Pattern

Example YAML configuration for the sidecar pattern. It defines a main application container which writes the current date to a log file every five seconds. The sidecar container is nginx serving that log file.

In practice, your sidecar is likely to be a log collection container that uploads to external storage

Sidecar Pattern - Scenario 1

Step 1: Run the Pod Manifest file

kubectl apply -f sidecar-pattern.yaml

Ensure Once the pod is running

Step 2: Connect to the sidecar pod and Access the log file via the sidecar

kubectl exec pod-with-sidecar -c busyboxplus -it -- curl http://localhost:80/app.txt

Sidecar Pattern - Scenario 2 ( Feel free to Experiment , you need to troubleshoot )

Step 1: Expose the Service for 2048App

kubectl apply -f expose-sidecar.yaml

Step 2: Run the Pod Manifest file

kubectl apply -f sidecar-git-sync.yaml

Ensure Once the pod is running

Step 3: Verify on which worker node the pod is running.

kubectl get pods -o wide

Step 4: Verify the port using the Service Command

kubectl get svc

Step 4: Browse the Node IP with the above mentioned port

http://myhostnodeip:XXXX

You should be able to see 2048 Game App Loaded in your Browser

Clear Pods,Deployments,Services

Delete all Pods

kubectl delete --all pods --namespace=default

Delete all Deployments

kubectl delete --all deployments --namespace=default

Delete all Services

kubectl delete --all svc --namespace=default

Clear Everything in the current namespace

kubectl delete all --all -n default