# Smoke Test In this lab you will complete a series of tasks to ensure your Kubernetes cluster is functioning correctly. ## Data Encryption In this section you will verify the ability to [encrypt secret data at rest](https://kubernetes.io/docs/tasks/administer-cluster/encrypt-data/#verifying-that-data-is-encrypted). Create a generic secret: ``` kubectl create secret generic kubernetes-the-hard-way \ --from-literal="mykey=mydata" ``` Print a hexdump of the `kubernetes-the-hard-way` secret stored in etcd: ``` gcloud compute ssh controller-0 \ --command "sudo ETCDCTL_API=3 etcdctl get \ --endpoints=https://127.0.0.1:2379 \ --cacert=/etc/etcd/ca.pem \ --cert=/etc/etcd/kubernetes.pem \ --key=/etc/etcd/kubernetes-key.pem\ /registry/secrets/default/kubernetes-the-hard-way | hexdump -C" ``` > output ``` 00000000 2f 72 65 67 69 73 74 72 79 2f 73 65 63 72 65 74 |/registry/secret| 00000010 73 2f 64 65 66 61 75 6c 74 2f 6b 75 62 65 72 6e |s/default/kubern| 00000020 65 74 65 73 2d 74 68 65 2d 68 61 72 64 2d 77 61 |etes-the-hard-wa| 00000030 79 0a 6b 38 73 3a 65 6e 63 3a 61 65 73 63 62 63 |y.k8s:enc:aescbc| 00000040 3a 76 31 3a 6b 65 79 31 3a dd 3f 36 6c ce 65 9d |:v1:key1:.?6l.e.| 00000050 b3 b1 46 1a ba ae a2 1f e4 fa 13 0c 4b 6e 2c 3c |..F.........Kn,<| 00000060 15 fa 88 56 84 b7 aa c0 7a ca 66 f3 de db 2b a3 |...V....z.f...+.| 00000070 88 dc b1 b1 d8 2f 16 3e 6b 4a cb ac 88 5d 23 2d |...../.>kJ...]#-| 00000080 99 62 be 72 9f a5 01 38 15 c4 43 ac 38 5f ef 88 |.b.r...8..C.8_..| 00000090 3b 88 c1 e6 b6 06 4f ae a8 6b c8 40 70 ac 0a d3 |;.....O..k.@p...| 000000a0 3e dc 2b b6 0f 01 b6 8b e2 21 29 4d 32 d6 67 a6 |>.+......!)M2.g.| 000000b0 4e 6d bb 61 0d 85 22 ea f4 d6 2d 0a af 3c 71 85 |Nm.a.."...-.. output ``` NAME READY STATUS RESTARTS AGE nginx-dbddb74b8-6lxg2 1/1 Running 0 10s ``` ### Port Forwarding In this section you will verify the ability to access applications remotely using [port forwarding](https://kubernetes.io/docs/tasks/access-application-cluster/port-forward-access-application-cluster/). Retrieve the full name of the `nginx` pod: ``` POD_NAME=$(kubectl get pods -l run=nginx -o jsonpath="{.items[0].metadata.name}") ``` Forward port `8080` on your local machine to port `80` of the `nginx` pod: ``` kubectl port-forward $POD_NAME 8080:80 ``` > output ``` Forwarding from 127.0.0.1:8080 -> 80 Forwarding from [::1]:8080 -> 80 ``` In a new terminal make an HTTP request using the forwarding address: ``` curl --head http://127.0.0.1:8080 ``` > output ``` HTTP/1.1 200 OK Server: nginx/1.15.4 Date: Sun, 30 Sep 2018 19:23:10 GMT Content-Type: text/html Content-Length: 612 Last-Modified: Tue, 25 Sep 2018 15:04:03 GMT Connection: keep-alive ETag: "5baa4e63-264" Accept-Ranges: bytes ``` Switch back to the previous terminal and stop the port forwarding to the `nginx` pod: ``` Forwarding from 127.0.0.1:8080 -> 80 Forwarding from [::1]:8080 -> 80 Handling connection for 8080 ^C ``` ### Logs In this section you will verify the ability to [retrieve container logs](https://kubernetes.io/docs/concepts/cluster-administration/logging/). Print the `nginx` pod logs: ``` kubectl logs $POD_NAME ``` > output ``` 127.0.0.1 - - [30/Sep/2018:19:23:10 +0000] "HEAD / HTTP/1.1" 200 0 "-" "curl/7.58.0" "-" ``` ### Exec In this section you will verify the ability to [execute commands in a container](https://kubernetes.io/docs/tasks/debug-application-cluster/get-shell-running-container/#running-individual-commands-in-a-container). Print the nginx version by executing the `nginx -v` command in the `nginx` container: ``` kubectl exec -ti $POD_NAME -- nginx -v ``` > output ``` nginx version: nginx/1.15.4 ``` ## Services In this section you will verify the ability to expose applications using a [Service](https://kubernetes.io/docs/concepts/services-networking/service/). Expose the `nginx` deployment using a [NodePort](https://kubernetes.io/docs/concepts/services-networking/service/#type-nodeport) service: ``` kubectl expose deployment nginx --port 80 --type NodePort ``` > The LoadBalancer service type can not be used because your cluster is not configured with [cloud provider integration](https://kubernetes.io/docs/getting-started-guides/scratch/#cloud-provider). Setting up cloud provider integration is out of scope for this tutorial. Retrieve the node port assigned to the `nginx` service: ``` NODE_PORT=$(kubectl get svc nginx \ --output=jsonpath='{range .spec.ports[0]}{.nodePort}') ``` Create a firewall rule that allows remote access to the `nginx` node port: ``` gcloud compute firewall-rules create kubernetes-the-hard-way-allow-nginx-service \ --allow=tcp:${NODE_PORT} \ --network kubernetes-the-hard-way ``` Retrieve the external IP address of a worker instance: ``` EXTERNAL_IP=$(gcloud compute instances describe worker-0 \ --format 'value(networkInterfaces[0].accessConfigs[0].natIP)') ``` Make an HTTP request using the external IP address and the `nginx` node port: ``` curl -I http://${EXTERNAL_IP}:${NODE_PORT} ``` > output ``` HTTP/1.1 200 OK Server: nginx/1.15.4 Date: Sun, 30 Sep 2018 19:25:40 GMT Content-Type: text/html Content-Length: 612 Last-Modified: Tue, 25 Sep 2018 15:04:03 GMT Connection: keep-alive ETag: "5baa4e63-264" Accept-Ranges: bytes ``` ## Untrusted Workloads This section will verify the ability to run untrusted workloads using [gVisor](https://github.com/google/gvisor). Create the `untrusted` pod: ``` cat < output ``` I0930 19:31:31.419765 21217 x:0] *************************** I0930 19:31:31.419907 21217 x:0] Args: [runsc --root /run/containerd/runsc/k8s.io ps af7470029008a4520b5db9fb5b358c65d64c9f748fae050afb6eaf014a59fea5] I0930 19:31:31.419959 21217 x:0] Git Revision: 50c283b9f56bb7200938d9e207355f05f79f0d17 I0930 19:31:31.420000 21217 x:0] PID: 21217 I0930 19:31:31.420041 21217 x:0] UID: 0, GID: 0 I0930 19:31:31.420081 21217 x:0] Configuration: I0930 19:31:31.420115 21217 x:0] RootDir: /run/containerd/runsc/k8s.io I0930 19:31:31.420188 21217 x:0] Platform: ptrace I0930 19:31:31.420266 21217 x:0] FileAccess: exclusive, overlay: false I0930 19:31:31.420424 21217 x:0] Network: sandbox, logging: false I0930 19:31:31.420515 21217 x:0] Strace: false, max size: 1024, syscalls: [] I0930 19:31:31.420676 21217 x:0] *************************** UID PID PPID C STIME TIME CMD 0 1 0 0 19:26 10ms app I0930 19:31:31.422022 21217 x:0] Exiting with status: 0 ``` Next: [Cleaning Up](14-cleanup.md)