changes plain to plaintext

docs/02-client-tools.md

@@ -56,7 +56,7 @@ cfssl version
 
 > output
 
-```plain
+```plaintext
 Version: 1.3.4
 Revision: dev
 Runtime: go1.13
@@ -113,7 +113,7 @@ kubectl version --client
 
 > output
 
-```plain
+```plaintext
 Client Version: version.Info{Major:"1", Minor:"15", GitVersion:"v1.15.3", GitCommit:"2d3c76f9091b6bec110a5e63777c332469e0cba2", GitTreeState:"clean", BuildDate:"2019-08-19T11:13:54Z", GoVersion:"go1.12.9", Compiler:"gc", Platform:"linux/amd64"}
 ```
 

docs/03-compute-resources.md

@@ -62,7 +62,7 @@ gcloud compute firewall-rules list --filter="network:kubernetes-the-hard-way"
 
 > output
 
-```plain
+```plaintext
 NAME                                    NETWORK                  DIRECTION  PRIORITY  ALLOW                 DENY
 kubernetes-the-hard-way-allow-external  kubernetes-the-hard-way  INGRESS    1000      tcp:22,tcp:6443,icmp
 kubernetes-the-hard-way-allow-internal  kubernetes-the-hard-way  INGRESS    1000      tcp,udp,icmp
@@ -85,7 +85,7 @@ gcloud compute addresses list --filter="name=('kubernetes-the-hard-way')"
 
 > output
 
-```plain
+```plaintext
 NAME                     REGION    ADDRESS        STATUS
 kubernetes-the-hard-way  us-west1  XX.XXX.XXX.XX  RESERVED
 ```
@@ -149,7 +149,7 @@ gcloud compute instances list
 
 > output
 
-```plain
+```plaintext
 NAME          ZONE        MACHINE_TYPE   PREEMPTIBLE  INTERNAL_IP  EXTERNAL_IP     STATUS
 controller-0  us-west1-c  n1-standard-1               10.240.0.10  XX.XXX.XXX.XXX  RUNNING
 controller-1  us-west1-c  n1-standard-1               10.240.0.11  XX.XXX.X.XX     RUNNING
@@ -171,7 +171,7 @@ gcloud compute ssh controller-0
 
 If this is your first time connecting to a compute instance SSH keys will be generated for you. Enter a passphrase at the prompt to continue:
 
-```plain
+```plaintext
 WARNING: The public SSH key file for gcloud does not exist.
 WARNING: The private SSH key file for gcloud does not exist.
 WARNING: You do not have an SSH key for gcloud.
@@ -183,7 +183,7 @@ Enter same passphrase again:
 
 At this point the generated SSH keys will be uploaded and stored in your project:
 
-```plain
+```plaintext
 Your identification has been saved in /home/$USER/.ssh/google_compute_engine.
 Your public key has been saved in /home/$USER/.ssh/google_compute_engine.pub.
 The key fingerprint is:
@@ -207,7 +207,7 @@ Waiting for SSH key to propagate.
 
 After the SSH keys have been updated you'll be logged into the `controller-0` instance:
 
-```plain
+```plaintext
 Welcome to Ubuntu 18.04.3 LTS (GNU/Linux 4.15.0-1042-gcp x86_64)
 ...
 
@@ -221,7 +221,7 @@ $USER@controller-0:~$ exit
 ```
 > output
 
-```plain
+```plaintext
 logout
 Connection to XX.XXX.XXX.XXX closed
 ```

docs/04-certificate-authority.md

@@ -53,7 +53,7 @@ cfssl gencert -initca ca-csr.json | cfssljson -bare ca
 
 Results:
 
-```plain
+```plaintext
 ca-key.pem
 ca.pem
 ```
@@ -100,7 +100,7 @@ cfssl gencert \
 
 Results:
 
-```plain
+```plaintext
 admin-key.pem
 admin.pem
 ```
@@ -150,7 +150,7 @@ done
 
 Results:
 
-```plain
+```plaintext
 worker-0-key.pem
 worker-0.pem
 worker-1-key.pem
@@ -197,7 +197,7 @@ cfssl gencert \
 
 Results:
 
-```plain
+```plaintext
 kube-controller-manager-key.pem
 kube-controller-manager.pem
 ```
@@ -241,7 +241,7 @@ cfssl gencert \
 
 Results:
 
-```plain
+```plaintext
 kube-proxy-key.pem
 kube-proxy.pem
 ```
@@ -284,7 +284,7 @@ cfssl gencert \
 
 Results:
 
-```plain
+```plaintext
 kube-scheduler-key.pem
 kube-scheduler.pem
 ```
@@ -339,7 +339,7 @@ cfssl gencert \
 
 Results:
 
-```plain
+```plaintext
 kubernetes-key.pem
 kubernetes.pem
 ```
@@ -384,7 +384,7 @@ cfssl gencert \
 
 Results:
 
-```plain
+```plaintext
 service-account-key.pem
 service-account.pem
 ```

docs/05-kubernetes-configuration-files.md

@@ -51,7 +51,7 @@ done
 
 Results:
 
-```plain
+```plaintext
 worker-0.kubeconfig
 worker-1.kubeconfig
 worker-2.kubeconfig
@@ -86,7 +86,7 @@ Generate a kubeconfig file for the `kube-proxy` service:
 
 Results:
 
-```plain
+```plaintext
 kube-proxy.kubeconfig
 ```
 
@@ -119,7 +119,7 @@ Generate a kubeconfig file for the `kube-controller-manager` service:
 
 Results:
 
-```plain
+```plaintext
 kube-controller-manager.kubeconfig
 ```
 
@@ -153,7 +153,7 @@ Generate a kubeconfig file for the `kube-scheduler` service:
 
 Results:
 
-```plain
+```plaintext
 kube-scheduler.kubeconfig
 ```
 
@@ -186,7 +186,7 @@ Generate a kubeconfig file for the `admin` user:
 
 Results:
 
-```plain
+```plaintext
 admin.kubeconfig
 ```
 

docs/07-bootstrapping-etcd.md

@@ -118,7 +118,7 @@ sudo ETCDCTL_API=3 etcdctl member list \
 
 > output
 
-```plain
+```plaintext
 3a57933972cb5131, started, controller-2, https://10.240.0.12:2380, https://10.240.0.12:2379
 f98dc20bce6225a0, started, controller-0, https://10.240.0.10:2380, https://10.240.0.10:2379
 ffed16798470cab5, started, controller-1, https://10.240.0.11:2380, https://10.240.0.11:2379

docs/08-bootstrapping-kubernetes-controllers.md

@@ -249,7 +249,7 @@ sudo systemctl enable nginx
 kubectl get componentstatuses --kubeconfig admin.kubeconfig
 ```
 
-```plain
+```plaintext
 NAME                 STATUS    MESSAGE              ERROR
 controller-manager   Healthy   ok
 scheduler            Healthy   ok
@@ -264,7 +264,7 @@ Test the nginx HTTP health check proxy:
 curl -H "Host: kubernetes.default.svc.cluster.local" -i http://127.0.0.1/healthz
 ```
 
-```plain
+```plaintext
 HTTP/1.1 200 OK
 Server: nginx/1.14.0 (Ubuntu)
 Date: Sat, 14 Sep 2019 18:34:11 GMT

docs/09-bootstrapping-kubernetes-workers.md

@@ -303,7 +303,7 @@ gcloud compute ssh controller-0 \
 
 > output
 
-```plain
+```plaintext
 NAME       STATUS   ROLES    AGE   VERSION
 worker-0   Ready    <none>   15s   v1.15.3
 worker-1   Ready    <none>   15s   v1.15.3

docs/10-configuring-kubectl.md

@@ -43,7 +43,7 @@ kubectl get componentstatuses
 
 > output
 
-```plain
+```plaintext
 NAME                 STATUS    MESSAGE             ERROR
 controller-manager   Healthy   ok
 scheduler            Healthy   ok
@@ -60,7 +60,7 @@ kubectl get nodes
 
 > output
 
-```plain
+```plaintext
 NAME       STATUS   ROLES    AGE    VERSION
 worker-0   Ready    <none>   2m9s   v1.15.3
 worker-1   Ready    <none>   2m9s   v1.15.3

docs/11-pod-network-routes.md

@@ -21,7 +21,7 @@ done
 
 > output
 
-```plain
+```plaintext
 10.240.0.20 10.200.0.0/24
 10.240.0.21 10.200.1.0/24
 10.240.0.22 10.200.2.0/24
@@ -48,7 +48,7 @@ gcloud compute routes list --filter "network: kubernetes-the-hard-way"
 
 > output
 
-```plain
+```plaintext
 NAME                            NETWORK                  DEST_RANGE     NEXT_HOP                  PRIORITY
 default-route-081879136902de56  kubernetes-the-hard-way  10.240.0.0/24  kubernetes-the-hard-way   1000
 default-route-55199a5aa126d7aa  kubernetes-the-hard-way  0.0.0.0/0      default-internet-gateway  1000

docs/12-dns-addon.md

@@ -12,7 +12,7 @@ kubectl apply -f https://storage.googleapis.com/kubernetes-the-hard-way/coredns.
 
 > output
 
-```plain
+```plaintext
 serviceaccount/coredns created
 clusterrole.rbac.authorization.k8s.io/system:coredns created
 clusterrolebinding.rbac.authorization.k8s.io/system:coredns created
@@ -29,7 +29,7 @@ kubectl get pods -l k8s-app=kube-dns -n kube-system
 
 > output
 
-```plain
+```plaintext
 NAME                       READY   STATUS    RESTARTS   AGE
 coredns-699f8ddd77-94qv9   1/1     Running   0          20s
 coredns-699f8ddd77-gtcgb   1/1     Running   0          20s
@@ -51,7 +51,7 @@ kubectl get pods -l run=busybox
 
 > output
 
-```plain
+```plaintext
 NAME      READY   STATUS    RESTARTS   AGE
 busybox   1/1     Running   0          3s
 ```
@@ -70,7 +70,7 @@ kubectl exec -ti $POD_NAME -- nslookup kubernetes
 
 > output
 
-```plain
+```plaintext
 Server:    10.32.0.10
 Address 1: 10.32.0.10 kube-dns.kube-system.svc.cluster.local
 

docs/13-smoke-test.md

@@ -27,7 +27,7 @@ gcloud compute ssh controller-0 \
 
 > output
 
-```plain
+```plaintext
 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|
@@ -65,7 +65,7 @@ kubectl get pods -l app=nginx
 
 > output
 
-```plain
+```plaintext
 NAME                     READY   STATUS    RESTARTS   AGE
 nginx-554b9c67f9-vt5rn   1/1     Running   0          10s
 ```
@@ -88,7 +88,7 @@ kubectl port-forward $POD_NAME 8080:80
 
 > output
 
-```plain
+```plaintext
 Forwarding from 127.0.0.1:8080 -> 80
 Forwarding from [::1]:8080 -> 80
 ```
@@ -101,7 +101,7 @@ curl --head http://127.0.0.1:8080
 
 > output
 
-```plain
+```plaintext
 HTTP/1.1 200 OK
 Server: nginx/1.17.3
 Date: Sat, 14 Sep 2019 21:10:11 GMT
@@ -115,7 +115,7 @@ Accept-Ranges: bytes
 
 Switch back to the previous terminal and stop the port forwarding to the `nginx` pod:
 
-```plain
+```plaintext
 Forwarding from 127.0.0.1:8080 -> 80
 Forwarding from [::1]:8080 -> 80
 Handling connection for 8080
@@ -134,7 +134,7 @@ kubectl logs $POD_NAME
 
 > output
 
-```plain
+```plaintext
 127.0.0.1 - - [14/Sep/2019:21:10:11 +0000] "HEAD / HTTP/1.1" 200 0 "-" "curl/7.52.1" "-"
 ```
 
@@ -150,7 +150,7 @@ kubectl exec -ti $POD_NAME -- nginx -v
 
 > output
 
-```plain
+```plaintext
 nginx version: nginx/1.17.3
 ```
 
@@ -196,7 +196,7 @@ curl -I http://${EXTERNAL_IP}:${NODE_PORT}
 
 > output
 
-```plain
+```plaintext
 HTTP/1.1 200 OK
 Server: nginx/1.17.3
 Date: Sat, 14 Sep 2019 21:12:35 GMT