CKA day1 july23

    1  lscpu
    2  free -m
    3  df -h
    4  git clone https://github.com/sandervanvugt/cka
    5  cd cka
    6  ls
    7  ls *sh
    8  ./setup-container.sh
    9  ls *sh
   10  less setup-kubetools-specific-version.sh
   11  ./setup-kubetools-specific-version.sh
   12  sudo ./setup-kubetools-specific-version.sh
   13  history
   14  sudo kubeadm init
   15  vim setup-kubetools-specific-version.sh
   16  ./setup-kubetools-specific-version.sh
   17  sudo ./setup-kubetools-specific-version.sh
   18  sudo kubeadm -h
   19  sudo kubeadm reset
   20  sudo kubeadm init
   21  vim ./setup-kubetools-specific-version.sh
   22  sudo apt remove -y kubelet=1.24.3-00 kubeadm=1.24.3-00 kubectl=1.24.3-00
   23  sudo apt remove -y --allow-change-held-packages kubelet=1.24.3-00 kubeadm=1.24.3-00 kubectl=1.24.3-00
   24  sudo ./setup-kubetools-specific-version.sh
   25  sudo kubeadm init
   26  kubectl get pods -A
   27  less setup-kubetools.sh
   28  kubectl apply -f https://raw.githubusercontent.com/projectcalico/calico/v3.25.0/manifests/calico.yaml
   29  kubectl get pods -n kube-system
   30  kubectl apply -f https://raw.githubusercontent.com/projectcalico/calico/v3.25.0/manifests/calico.yaml
   31  kubectl get nodes
   32  history
   33  kubectl get nodes
   34  ./counter.sh 5
   35  history
   36  git pull
   37  cd ..
   38  rm -rf cka
   39  git clone https://github.com/sandervanvugt/cka
   40  cd cka
   41  cat cluster-setup.txt
   42  kubectl create ns mynamespace
   43  kubectl run task2pod --image=alpine -n mynamespace -- /bin/sh -c 'sleep 3600'
   44  kubectl get ns
   45  kubectl get pods -n mynamespace
   46  source <(kubectl completion bash)
   47  kubectl get pods -n mynamespace -o yaml
   48  kubectl run task2pod2 --image=alpine -n mynamespace -- sleep 3600
   49  kubectl get pods -n mynamespace task2pod2 -o yaml | less
   50  history
   51  vim co3.yaml
   52  vim jc3.yaml
   53  kubectl apply -f jc3.yaml
   54  kubectl get pods
   55  kubectl logs task3pod
   56  kubectl describe pod task3pod
   57  kubectl run dummy --image=busybox --dry-run -o yaml -- sleep 3600
   58  vim jc3.yaml
   59  kubectl delete pod task3pod
   60  kubectl apply -f jc3.yaml
   61  kubectl get pods
   62  history
   63  vim jc3.yaml
   64  kubectl create deployment nginx-ex5 --image=nginx --replicas=2
   65  kubectl get all
   66  kubectl scale deployment nginx-ex5 --replicas 4
   67  kubectl get all
   68  kubectl create ns limited
   69  kubectl create quota -h | less
   70  kubectl create quota --hard pods=3,cpu=100m,memory=500Mi -n limited
   71  kubectl create quota qtest --hard pods=3,cpu=100m,memory=500Mi -n limited
   72  kubectl describe quota -n limited
   73  kubectl describe ns limited
   74  kubectl create deployment nginx --image=nginx --replicas=3 -n limited
   75  kubectl get all -n limited
   76  kubectl get -n limited rs nginx-77b4fdf86c
   77  kubectl describe -n limited rs nginx-77b4fdf86c
   78  kubectl -n limited set resources -h
   79  kubectl -n limited set resources -h | less
   80  kubectl -n limited set resources deploy nginx --requests cpu=100m,memory=5Mi --limits cpu=200m,memory=20Mi
   81  kubectl get pods -n limited
   82  kubectl get all -n limited
   83  kubectl describe ns limited
   84  kubectl edit -n limited quota qtest
   85  kubectl get all -n limited
   86  kubectl scale deployment -n limited --replicas 4
   87  kubectl scale deployment nginx -n limited --replicas 4
   88  kubectl scale deployment nginx -n limited --replicas 3
   89  kubectl get all -n limited
   90  vim jh7.txt
   91  kubectl describe ns limited
   92  kubectl run testpod --image=nginx -n limited
   93  vim jh7.txt
   94  kubectl run testpod --image=busybox --dry-run=client -o yaml -n limited -- sleep 3600
   95  kubectl run testpod --image=busybox --dry-run=client -o yaml -n limited -- sleep 3600 > mycode.yaml
   96  kubectl get pods -n limited nginx-8647459fc7-pzlkt
   97  kubectl get pods -n limited nginx-8647459fc7-pzlkt -o yaml
   98  vim mycode.yaml
   99  kubectl apply -f mycode.yaml
  100  historey
  101  history
  102  vim jh7.txt
  103  vim nwpolicy-complete-example.yaml
  104  kubectl apply -f nwpolicy-complete-example.yaml
  105  kubectl expose pod nginx --port=80
  106  kubectl exec -it busybox -- wget --spider --timeout=1 nginx
  107  kubectl get pods --show-labels
  108  kubectl label pod busybox access=true
  109  kubectl exec -it busybox -- wget --spider --timeout=1 nginx
  110  kubectl get pods --show-labels
  111  kubectl create ns nwp-namespace
  112  vim nwp-lab9-1.yaml
  113  kubectl apply -f nwp-lab9-1.yaml
  114  kubectl expose pod nwp-nginx --port=80
  115  kubectl get svc
  116  kubectl exec -it nwp-busybox -n nwp-namespace -- wget --spider --timeout=1 nwp-nginx
  117  kubectl exec -it nwp-busybox -n nwp-namespace -- nslookup nwp-nginx
  118  kubectl get svc,pods -n kube-system
  119  kubectl exec -it nwp-busybox -n nwp-namespace -- nslookup nwp-nginx.default.svc.cluster.local
  120  kubectl get svc
  121  kubectl exec -it nwp-busybox -n nwp-namespace -- wget --spider --timeout=1 nwp-nginx.default.svc.cluster.local
  122  vim nwp-lab9-2.yaml
  123  kubectl apply -f nwp-lab9-2.yaml
  124  kubectl exec -it nwp-busybox -n nwp-namespace -- wget --spider --timeout=1 nwp-nginx.default.svc.cluster.local
  125  kubectl create deploy busybox --image=busybox -- sleep 3600
  126  kubectl exec -it busybox-c95495658-8jnj5 -- wget --spider --timeout=1 nwp-nginx
  127  kubectl default -f nwp-lab9-2.yaml
  128  kubectl delete -f nwp-lab9-2.yaml
  129  vim jh12.yaml
  130  kubectl apply -f jh12.yaml
  131  kubectl create ns restricted
  132  kubectl apply -f jh12.yaml
  133  kubectl delete -f jh12.yaml
  134  kubectl apply -f jh12.yaml
  135  vim jh12.yaml
  136  kubectl exec -it busybox -- wget --spider --timeout=1 nginx.restricted.svc.cluster.local
  137  kubectl get pods --show-labels
  138  kubectl exec -it busybox-c95495658-8jnj5 -- wget --spider --timeout=1 nginx.restricted.svc.cluster.local
  139  history
  140  ./counter.sh 5
  141  kubectl -h | less
  142  kubectl cordon -h | less
  143  kubectl drain -h | less
  144  kubectl drain worker2
  145  kubectl drain worker2 --ignore-daemonsets --force
  146  kubectl get pods -o wide
  147  kubectl get nodes
  148  kubectl edit worker2
  149  kubectl edit node worker2
  150  kubectl uncordon worker2
  151  kubectl get nodes
  152  kubectl edit node worker2
  153  kubectl get pods -A -o wide
  154  kubectl get ds -A
  155  kubectl get pods -o wide
  156  kubectl create newdep --image=nginx --replicas=5
  157  kubectl create deploy newdep --image=nginx --replicas=5
  158  kubectl get pods -o wide
  159  kubectl scale deploy nginx-ex5 --replicas=1
  160  kubectl scale deploy nginx-ex5 --replicas=4
  161  kubectl get pods -o wide
  162  kubectl label nodes worker2 disktype=ssd
  163  vim selector-pod.yaml
  164  kubectl cordon worker2
  165  kubectl apply -f selector-pod.yaml
  166  kubectl get pods -o wide
  167  kubectl describe pod nginx
  168  kubectl uncordon worker2
  169  kubectl get pods -o wide
  170  kubectl edit node control
  171  kubectl get pods -n kube-system -o wide
  172  kubectl edit -n kube-system pod coredns-5d78c9869d-
  173  kubectl edit -n kube-system pod coredns-5d78c9869d-2brbt
  174  kubectl taint nodes worker1 example-key=value1:NoSchedule
  175  kubectl describe node worker1
  176  kubectl describe node worker1 | less
  177  kubectl create deploy nginx-taint --image=nginx --replicas=5
  178  kubectl get pods -o wide
  179  kubectl delete deploy nginx-taint
  180  vim taint-toleration.yaml
  181  kubectl create -f taint-toleration.yaml
  182  kubectl get pods -o wide
  183  kubectl delete -f taint-toleration.yaml
  184  vim taint-toleration.yaml
  185  kubectl describe node worker1
  186  vim taint-toleration.yaml
  187  kubectl create -f taint-toleration.yaml
  188  history