writeups/google-cloudskillsboost: [GSP305]

Scale Out and Update a Containerized Application on a Kubernetes Cluster

content/writeups/google-cloudskillsboost/GSP305/index.md

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+---
+title: "[GSP305] Scale Out and Update a Containerized Application on a Kubernetes Cluster"
+description: ""
+summary: "Quest: Cloud Architecture: Design, Implement, and Manage"
+date: 2023-05-25T07:55:03+07:00
+draft: false
+author: "Hiiruki" # ["Me", "You"] # multiple authors
+tags: ["writeups", "challenge", "google-cloudskillsboost", "gsp305", "google-cloud", "cloudskillsboost", "juaragcp", "google-cloud-platform", "gcp", "container", "kubernetes", "cloud-computing", "cloud", "cloud-architecture"]
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+---
+
+### GSP305
+
+![Lab Banner](https://cdn.qwiklabs.com/GMOHykaqmlTHiqEeQXTySaMXYPHeIvaqa2qHEzw6Occ%3D#center)
+
+---
+
+- Time: 1 hour<br>
+- Difficulty: Intermediate<br>
+- Price: 5 Credits
+
+Lab: [GSP305](https://www.cloudskillsboost.google/focuses/1739?parent=catalog)<br>
+Quest: [Cloud Architecture: Design, Implement, and Manage](https://www.cloudskillsboost.google/quests/124)<br>
+
+🔄 Last updated: Sep 7, 2023
+
+---
+
+## Challenge scenario
+
+You are taking over ownership of a test environment and have been given an updated version of a containerized test application to deploy. Your systems' architecture team has started adopting a containerized microservice architecture. You are responsible for managing the containerized test web applications. You will first deploy the initial version of a test application, called `echo-app` to a Kubernetes cluster called `echo-cluster` in a deployment called `echo-web`.
+
+Before you get started, open the navigation menu and select **Cloud Storage**. The last steps in the Deployment Manager script used to set up your environment creates a bucket.
+
+Refresh the Storage browser until you see your bucket. You can move on once your Console resembles the following:
+
+![bucket](./images/bucket.webp#center)
+
+Check to make sure your GKE cluster has been created before continuing. Open the navigation menu and select **Kubernetes Engine** > **Clusters**.
+
+Continue when you see a green checkmark next to `echo-cluster`:
+
+![kubernetes cluster](./images/kubernetes_cluster.webp#center)
+
+To deploy your first version of the application, run the following commands in Cloud Shell to get up and running:
+
+```bash
+gcloud container clusters get-credentials echo-cluster --zone=us-central1-a
+```
+
+```bash
+kubectl create deployment echo-web --image=gcr.io/qwiklabs-resources/echo-app:v1
+```
+
+```bash
+kubectl expose deployment echo-web --type=LoadBalancer --port 80 --target-port 8000
+```
+
+## Your challenge
+
+You need to update the running `echo-app` application in the `echo-web` deployment from the v1 to the v2 code you have been provided. You must also scale out the application to 2 instances and confirm that they are all running.
+
+1. Check that there is a tagged image in gcr.io for echo-app:v2.
+
+    ```bash
+    mkdir echo-web
+    cd echo-web
+    gsutil cp -r gs://$DEVSHELL_PROJECT_ID/echo-web-v2.tar.gz .
+    tar -xzf echo-web-v2.tar.gz
+    rm echo-web-v2.tar.gz
+    docker build -t echo-app:v2 .
+    docker tag echo-app:v2 gcr.io/$DEVSHELL_PROJECT_ID/echo-app:v2
+    docker push gcr.io/$DEVSHELL_PROJECT_ID/echo-app:v2
+    ```
+
+2. Echo-app:v2 is running on the Kubernetes cluster.
+
+    Deploy the first version of the application.
+
+    ```bash
+    gcloud container clusters get-credentials echo-cluster --zone=us-central1-a
+    kubectl create deployment echo-web --image=gcr.io/qwiklabs-resources/echo-app:v1
+    kubectl expose deployment echo-web --type=LoadBalancer --port 80 --target-port 8000
+    ```
+
+    Edit the `deployment.apps` file.
+
+    ```bash
+    kubectl edit deploy echo-web
+    ```
+
+    Start the editor by type `i`. Change `image=...:v1` to `image=...:v2`.
+
+    `image=gcr.io/qwiklabs-resources/echo-app:v2`
+
+    Save the `deployment.apps` file, hit **ESC** then type `:wq` and **Enter**.
+
+3. The Kubernetes cluster deployment reports 2 replicas.
+
+    ```bash
+    kubectl scale deployment echo-web --replicas=2
+    ```
+
+4. The application must respond to web requests with V2.0.0.
+
+    ```bash
+    kubectl expose deployment echo-web --type=LoadBalancer --port 80 --target-port 8000
+
+    kubectl get svc
+    ```
+
+## Congratulations!