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== cluster details and health status == {{{#!highlight bash $ kubectl cluster-info Kubernetes master is running at https://172.17.0.30:8443 KubeDNS is running at https://172.17.0.30:8443/api/v1/namespaces/kube-system/services/kube-dns:dns/proxy To further debug and diagnose cluster problems, use 'kubectl cluster-info dump'. }}} == get cluster nodes == {{{#!highlight bash $ kubectl get nodes NAME STATUS ROLES AGE VERSION minikube Ready master 3m1s v1.15.0 }}} == deploy containers == {{{ # deploy container $ kubectl create deployment first-deployment --image=katacoda/docker-http-server deployment.apps/first-deployment created $ # deploy container in cluster # check pods $ kubectl get pods NAME READY STATUS RESTARTS AGE first-deployment-8cbf74484-s2fkl 1/1 Running 0 25s # expose deployment $ kubectl expose deployment first-deployment --port=80 --type=NodePort service/first-deployment exposed $ kubectl get svc first-deployment NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE first-deployment NodePort 10.98.246.87 <none> 80:31219/TCP 105s # do request to port 80 in cluster ip $ curl 10.98.246.87:80 <h1>This request was processed by host: first-deployment-8cbf74484-s2fkl</h1> $curl host01:31219 <h1>This request was processed by host: first-deployment-8cbf74484-s2fkl</h1> }}} == dashboard == {{{ $ minikube addons enable dashboard #The Kubernetes dashboard allows you to view your applications in a UI. * dashboard was successfully enabled $ kubectl apply -f /opt/kubernetes-dashboard.yaml # only in katacoda service/kubernetes-dashboard-katacoda created # check progress $ kubectl get pods -n kube-system -w #check progress NAME READY STATUS RESTARTS AGE coredns-5c98db65d4-b2kxm 1/1 Running 0 17m coredns-5c98db65d4-mm567 1/1 Running 1 17m etcd-minikube 1/1 Running 0 16m kube-addon-manager-minikube 1/1 Running 0 16m kube-apiserver-minikube 1/1 Running 0 16m kube-controller-manager-minikube 1/1 Running 0 16m kube-proxy-pngm9 1/1 Running 0 17m kube-scheduler-minikube 1/1 Running 0 16m kubernetes-dashboard-7b8ddcb5d6-xt5nt 1/1 Running 0 76s storage-provisioner 1/1 Running 0 17m ^C$ # dashboard url https://2886795294-30000-kitek05.environments.katacoda.com/ }}} |
kubernetes
- minikube version # check version 1.2.0
- minikube start
1 $ minikube version
2 minikube version: v1.2.0
3 $ minikube start
4 * minikube v1.2.0 on linux (amd64)
5 * Creating none VM (CPUs=2, Memory=2048MB, Disk=20000MB) ...
6 * Configuring environment for Kubernetes v1.15.0 on Docker 18.09.5
7 - kubelet.resolv-conf=/run/systemd/resolve/resolv.conf
8 * Pulling images ...
9 * Launching Kubernetes ...
10
11 * Configuring local host environment ...
12 * Verifying: apiserver proxy etcd scheduler controller dns
13 * Done! kubectl is now configured to use "minikube"
cluster details and health status
get cluster nodes
deploy containers
# deploy container $ kubectl create deployment first-deployment --image=katacoda/docker-http-server deployment.apps/first-deployment created $ # deploy container in cluster # check pods $ kubectl get pods NAME READY STATUS RESTARTS AGE first-deployment-8cbf74484-s2fkl 1/1 Running 0 25s # expose deployment $ kubectl expose deployment first-deployment --port=80 --type=NodePort service/first-deployment exposed $ kubectl get svc first-deployment NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE first-deployment NodePort 10.98.246.87 <none> 80:31219/TCP 105s # do request to port 80 in cluster ip $ curl 10.98.246.87:80 <h1>This request was processed by host: first-deployment-8cbf74484-s2fkl</h1> $curl host01:31219 <h1>This request was processed by host: first-deployment-8cbf74484-s2fkl</h1>
dashboard
$ minikube addons enable dashboard #The Kubernetes dashboard allows you to view your applications in a UI. * dashboard was successfully enabled $ kubectl apply -f /opt/kubernetes-dashboard.yaml # only in katacoda service/kubernetes-dashboard-katacoda created # check progress $ kubectl get pods -n kube-system -w #check progress NAME READY STATUS RESTARTS AGE coredns-5c98db65d4-b2kxm 1/1 Running 0 17m coredns-5c98db65d4-mm567 1/1 Running 1 17m etcd-minikube 1/1 Running 0 16m kube-addon-manager-minikube 1/1 Running 0 16m kube-apiserver-minikube 1/1 Running 0 16m kube-controller-manager-minikube 1/1 Running 0 16m kube-proxy-pngm9 1/1 Running 0 17m kube-scheduler-minikube 1/1 Running 0 16m kubernetes-dashboard-7b8ddcb5d6-xt5nt 1/1 Running 0 76s storage-provisioner 1/1 Running 0 17m ^C$ # dashboard url https://2886795294-30000-kitek05.environments.katacoda.com/