MicroK8s quick start guide
https://microk8s.io/docs/
K8S tutorial for sample app
Deploy introduction
https://kubernetes.io/docs/tutorials/kubernetes-basics/deploy-app/deploy-intro/
Explore introduction https://kubernetes.io/docs/tutorials/kubernetes-basics/explore/explore-intro/
Intercative tutorial
https://kubernetes.io/docs/tutorials/kubernetes-basics/deploy-app/deploy-interactive/
K8S tutorial for sample app
Deploy introduction
https://kubernetes.io/docs/tutorials/kubernetes-basics/deploy-app/deploy-intro/
Explore introduction https://kubernetes.io/docs/tutorials/kubernetes-basics/explore/explore-intro/
Intercative tutorial
https://kubernetes.io/docs/tutorials/kubernetes-basics/deploy-app/deploy-interactive/
Get nodes
[dave@localhost ~]$ microk8s.kubectl get nodes
NAME STATUS ROLES AGE VERSION
localhost.localdomain Ready <none> 24h v1.17.2
Get services
[dave@localhost ~]$ microk8s.kubectl get services
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
kubernetes ClusterIP 10.152.183.1 <none> 443/TCP 24h
[dave@localhost ~]$ microk8s.kubectl create deployment kubernetes-bootcamp --image=gcr.io/google-samples/kubernetes-bootcamp:v1
deployment.apps/kubernetes-bootcamp created
[dave@localhost ~]$ microk8s.kubectl get pods
NAME READY STATUS RESTARTS AGE
kubernetes-bootcamp-69fbc6f4cf-f2vvk 1/1 Running 0 41s
Get deployments
Get pod name
Describe pods
Explore introduction https://kubernetes.io/docs/tutorials/kubernetes-basics/explore/explore-intro/
Get logs from pod
Exec commands on pod
Run bash in pod
[dave@localhost ~]$ kubectl get deployments
NAME READY UP-TO-DATE AVAILABLE AGE
kubernetes-bootcamp 1/1 1 1 7m12s
Get pod name
[dave@localhost ~]$ export POD_NAME=$(kubectl get pods -o go-template --template '{{range .items}}{{.metadata.name}}{{"\n"}}{{end}}')
[dave@localhost ~]$ echo Name of the Pod: $POD_NAME
Name of the Pod: kubernetes-bootcamp-69fbc6f4cf-f2vvk
Describe pods
[dave@localhost ~]$ kubectl describe pods
Name: kubernetes-bootcamp-69fbc6f4cf-f2vvk
Namespace: default
Priority: 0
Node: localhost.localdomain/192.168.0.116
Start Time: Sun, 09 Feb 2020 08:53:15 +0100
Labels: app=kubernetes-bootcamp
pod-template-hash=69fbc6f4cf
Annotations: <none>
Status: Running
IP: 10.1.30.34
IPs:
IP: 10.1.30.34
Controlled By: ReplicaSet/kubernetes-bootcamp-69fbc6f4cf
Containers:
kubernetes-bootcamp:
Container ID: containerd://e1c171143d299f88fb686f83e2fa2aae1cbe59e14cff53f4f332c2ccc2fb3f2e
Image: gcr.io/google-samples/kubernetes-bootcamp:v1
Image ID: gcr.io/google-samples/kubernetes-bootcamp@sha256:0d6b8ee63bb57c5f5b6156f446b3bc3b3c143d233037f3a2f00e279c8fcc64af
Port: <none>
Host Port: <none>
State: Running
Started: Sun, 09 Feb 2020 08:53:26 +0100
Ready: True
Restart Count: 0
Environment: <none>
Mounts:
/var/run/secrets/kubernetes.io/serviceaccount from default-token-msp2q (ro)
Conditions:
Type Status
Initialized True
Ready True
ContainersReady True
PodScheduled True
Volumes:
default-token-msp2q:
Type: Secret (a volume populated by a Secret)
SecretName: default-token-msp2q
Optional: false
QoS Class: BestEffort
Node-Selectors: <none>
Tolerations: node.kubernetes.io/not-ready:NoExecute for 300s
node.kubernetes.io/unreachable:NoExecute for 300s
Events:
Type Reason Age From Message
---- ------ ---- ---- -------
Normal Scheduled 11m default-scheduler Successfully assigned default/kubernetes-bootcamp-69fbc6f4cf-f2vvk to localhost.localdomain
Normal Pulling 11m kubelet, localhost.localdomain Pulling image "gcr.io/google-samples/kubernetes-bootcamp:v1"
Normal Pulled 11m kubelet, localhost.localdomain Successfully pulled image "gcr.io/google-samples/kubernetes-bootcamp:v1"
Normal Created 11m kubelet, localhost.localdomain Created container kubernetes-bootcamp
Normal Started 11m kubelet, localhost.localdomain Started container kubernetes-bootcamp
Explore introduction https://kubernetes.io/docs/tutorials/kubernetes-basics/explore/explore-intro/
Get logs from pod
[dave@localhost ~]$ kubectl logs $POD_NAME
Kubernetes Bootcamp App Started At: 2020-02-09T07:53:26.300Z | Running On: kubernetes-bootcamp-69fbc6f4cf-f2vvk
Exec commands on pod
[dave@localhost ~]$ kubectl exec $POD_NAME env
PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
HOSTNAME=kubernetes-bootcamp-69fbc6f4cf-f2vvk
NPM_CONFIG_LOGLEVEL=info
NODE_VERSION=6.3.1
KUBERNETES_PORT=tcp://10.152.183.1:443
KUBERNETES_PORT_443_TCP=tcp://10.152.183.1:443
KUBERNETES_PORT_443_TCP_PROTO=tcp
KUBERNETES_PORT_443_TCP_PORT=443
KUBERNETES_PORT_443_TCP_ADDR=10.152.183.1
KUBERNETES_SERVICE_HOST=10.152.183.1
KUBERNETES_SERVICE_PORT=443
KUBERNETES_SERVICE_PORT_HTTPS=443
HOME=/root
Run bash in pod
[dave@localhost ~]$ kubectl exec -ti $POD_NAME bash
root@kubernetes-bootcamp-69fbc6f4cf-f2vvk:/# cat server.js
var http = require('http');
var requests=0;
var podname= process.env.HOSTNAME;
var startTime;
var host;
var handleRequest = function(request, response) {
response.setHeader('Content-Type', 'text/plain');
response.writeHead(200);
response.write("Hello Kubernetes bootcamp! | Running on: ");
response.write(host);
response.end(" | v=1\n");
console.log("Running On:" ,host, "| Total Requests:", ++requests,"| App Uptime:", (new Date() - startTime)/1000 , "seconds", "| Log Time:",new Date());
}
var www = http.createServer(handleRequest);
www.listen(8080,function () {
startTime = new Date();;
host = process.env.HOSTNAME;
console.log ("Kubernetes Bootcamp App Started At:",startTime, "| Running On: " ,host, "\n" );
});
root@kubernetes-bootcamp-69fbc6f4cf-f2vvk:/# curl localhost:8080
Hello Kubernetes bootcamp! | Running on: kubernetes-bootcamp-69fbc6f4cf-f2vvk | v=1
