Kubernetes Namespaces & Contexts


Делаю: 06.04.2019


По материалам из видео индуса:

https://www.youtube.com/watch?v=2h6TAJirDqI&list=PL34sAs7_26wNBRWM6BDhnonoA5FMERax0&index=9


Подготовили кластер и окружение как здесь.


$ kubectl get ns
NAME              STATUS   AGE
default           Active   3h12m
kube-node-lease   Active   3h12m
kube-public       Active   3h12m
kube-system       Active   3h12m


$ kubectl --namespace kube-system get pods
NAME                                 READY   STATUS    RESTARTS   AGE
coredns-fb8b8dccf-rv6kf              1/1     Running   0          3h14m
coredns-fb8b8dccf-x72r6              1/1     Running   0          3h14m
etcd-master.k8s                      1/1     Running   0          3h13m
kube-apiserver-master.k8s            1/1     Running   0          3h13m
kube-controller-manager-master.k8s   1/1     Running   0          3h13m
kube-flannel-ds-amd64-d2bv7          1/1     Running   0          3h14m
kube-flannel-ds-amd64-dxmlp          1/1     Running   0          3h12m
kube-flannel-ds-amd64-qzr5m          1/1     Running   2          3h10m
kube-proxy-9n587                     1/1     Running   0          3h14m
kube-proxy-mxfxj                     1/1     Running   0          3h10m
kube-proxy-xhprk                     1/1     Running   0          3h12m
kube-scheduler-master.k8s            1/1     Running   0          3h13m
tiller-deploy-8458f6c667-j5ld8       1/1     Running   0          165m


$ kubectl create namespace demo


$ kubectl config get-contexts

$ kubectl config set-context kubesys --namespace=kube-system --user=kubernetes-admin --cluster=kubernetes

$ kubectl config current-context
[email protected]

$ kubectl config use-context kubesys

$ kubectl get pods

$ kubectl config set-context demo --namespace=demo --user=kubernetes-admin --cluster=kubernetes

$ kubectl config get-contexts

$ kubectl config use-context demo

$ kubectl create -f https://bitbucket.org/sysadm-ru/kubernetes/raw/faf2f86a2c1bb82053c5aba9ea7c96463e4e61b0/yamls/1-nginx-pod.yaml

$ kubectl get pods
NAME    READY   STATUS    RESTARTS   AGE
nginx   1/1     Running   0          27s

$ kubectl -n demo get pods
NAME    READY   STATUS    RESTARTS   AGE
nginx   1/1     Running   0          87s


Удаление

$ kubectl delete pod nginx