Added knative preparation script

Signed-off-by: Abhishek Kumar <abhishek22512@gmail.com>

Author: octonawish-akcodes

tools/knative_preparation.py

@@ -0,0 +1,83 @@
+import subprocess
+import shutil
+
+def run_command(command, check=True):
+    try:
+        subprocess.run(command, shell=True, check=check)
+    except subprocess.CalledProcessError as e:
+        print(f"Error occurred: {e}")
+        exit(1)
+
+def is_installed(command):
+    return shutil.which(command) is not None
+
+def install_minikube():
+    if is_installed("minikube"):
+        print("Minikube is already installed.")
+    else:
+        print("Installing Minikube...")
+        run_command("curl -LO https://storage.googleapis.com/minikube/releases/latest/minikube-linux-amd64")
+        run_command("sudo install minikube-linux-amd64 /usr/local/bin/minikube && rm minikube-linux-amd64")
+
+def install_kubectl():
+    if is_installed("kubectl"):
+        print("kubectl is already installed.")
+    else:
+        print("Installing kubectl...")
+        run_command('curl -LO "https://dl.k8s.io/release/$(curl -L -s https://dl.k8s.io/release/stable.txt)/bin/linux/amd64/kubectl"')
+        run_command('curl -LO "https://dl.k8s.io/release/$(curl -L -s https://dl.k8s.io/release/stable.txt)/bin/linux/amd64/kubectl.sha256"')
+        run_command('echo "$(cat kubectl.sha256)  kubectl" | sha256sum --check')
+        run_command("sudo install -o root -g root -m 0755 kubectl /usr/local/bin/kubectl")
+
+def install_cosign():
+    if is_installed("cosign"):
+        print("Cosign is already installed.")
+    else:
+        print("Installing Cosign...")
+        run_command('curl -O -L "https://github.com/sigstore/cosign/releases/latest/download/cosign-linux-amd64"')
+        run_command('sudo mv cosign-linux-amd64 /usr/local/bin/cosign')
+        run_command('sudo chmod +x /usr/local/bin/cosign')
+
+def install_jq():
+    if is_installed("jq"):
+        print("jq is already installed.")
+    else:
+        print("Installing jq...")
+        run_command('sudo apt-get update && sudo apt-get install -y jq')
+
+def install_knative():
+    print("Extracting images from the manifest and verifying signatures...")
+    run_command(
+        'curl -sSL https://github.com/knative/serving/releases/download/knative-v1.14.1/serving-core.yaml '
+        '| grep "gcr.io/" | awk \'{print $2}\' | sort | uniq '
+        '| xargs -n 1 cosign verify -o text '
+        '--certificate-identity=signer@knative-releases.iam.gserviceaccount.com '
+        '--certificate-oidc-issuer=https://accounts.google.com'
+    )
+
+    print("Installing Knative Serving component...")
+    run_command('kubectl apply -f https://github.com/knative/serving/releases/download/knative-v1.14.1/serving-crds.yaml')
+    run_command('kubectl apply -f https://github.com/knative/serving/releases/download/knative-v1.14.1/serving-core.yaml')
+
+    print("Installing Knative Kourier networking layer...")
+    run_command('kubectl apply -f https://github.com/knative/net-kourier/releases/download/knative-v1.14.0/kourier.yaml')
+    run_command('kubectl patch configmap/config-network '
+                '--namespace knative-serving '
+                '--type merge '
+                '--patch \'{"data":{"ingress-class":"kourier.ingress.networking.knative.dev"}}\'')
+
+    print("Fetching External IP address or CNAME...")
+    run_command('kubectl --namespace kourier-system get service kourier')
+
+    print("Verifying Knative Serving installation...")
+    run_command('kubectl get pods -n knative-serving')
+
+def main():
+    install_minikube()
+    install_kubectl()
+    install_cosign()
+    install_jq()
+    install_knative()
+
+if __name__ == "__main__":
+    main()