CKAD dec22 2 days

#### root commands

apt update
    2  apt-cache madison kubeadm
    3  #apt-mark unhold kubeadm && \
    4  apt-mark unhold kubeadm
    5  #apt-get update && apt-get install -y kubeadm=1.25.5-00
    6  kubectl version
    7  apt-get update && apt-get install -y kubeadm=1.25.5-00
    8  apt-mark hold kubeadm
    9  kubeadm version
   10  exit
   11  kubeadm upgrade plan
   12  kubeadm upgrade apply v1.25.5
   13  exit
   14  apt-cache madison kubeadm
   15  apt-mark unhold kubeadm &&  apt-get update && apt-get install -y kubeadm=1.24.9-00 &&  apt-mark hold kubeadm
   16  kubeadm version
   17  kubeadm upgrade plan
   18  exit
   19  kubeadm upgrade apply v1.24.9
   20  kubeadm upgrade apply v1.25.5
   21  exit
   22  history

#### student commands
student@control:~/cka$ history
    1  cd ckad
    2  cd cka
    3  ./counter.sh 18
    4  ./counter.sh 5
    5  ./counter.sh 6
    6  vim lab4.yaml
    7  ./counter.sh 13
    8  ./counter.sh 10
    9  ./counter.sh 5
   10  ./counter.sh 6
   11  ./counter.sh 20
   12  ./counter.sh 24
   13  ./counter.sh 7
   14  ./counter.sh 15
   15  sudo apt install vim git -y
   16  git clone https://github.com/sandervanvugt/cka
   17  cd cka
   18  ls
   19  sudo ./setup-container.sh
   20  ls
   21  sudo ./setup-kubetools-specific-version.sh
   22  history
   23  sudo kubeadm init
   24  mkdir -p $HOME/.kube
   25  kubectl get all
   26  kubectl apply -f https://docs.projectcalico.org/manifests/calico.yaml
   27  history
   28  kubectl get nodes
   29  kubectl create deploy testginx --image=nginx --replicas=3
   30  source <(kubectl completion bash)
   31  kubectl get all
   32  ./counter.sh 20
   33  history
   34  sudo kubeadm token create --print-join-command
   35  sudo kubeadm --help | less
   36  kubectl create ns mynamespace
   37  kubectl run alpine --image alpine --command sleep 3600 --restart Always -n mynamespace
   38  kubectl run -h | less
   39  kubectl get pods
   40  kubectl get pods -n mynamespace
   41  kubectl get pods -n mynamespace -o yaml | less
   42  history
   43  ls
   44  history
   45  vim ah.yaml
   46  kubectl apply -f ah.yaml
   47  kubectl get pods
   48  vim ah.yaml
   49  history
   50  vim lab4.yaml
   51  kubectl apply -f lab4.yaml
   52  kubectl get pods
   53  cat lab4.yaml
   54  kubectl create ns limited
   55  kubectl create quota -h | less
   56  kubectl create quota qtest --hard pods=3,cpu=100m,memory=500Mi -n limited
   57  kubectl describe ns limited
   58  kubectl describe quota -n limited
   59  kubectl create deploy nginx --image=nginx --replicas=3 -n limited
   60  kubectl get all -n limited
   61  kubectl describe -n limited replicasets.apps nginx-8f458dc5b
   62  kubectl set resources -h | less
   63  kubectl set resources -n limited deploy nginx --requests cpu=100m,memory=5Mi --limits cpu=200m,memory=20Mi
   64  kubectl get all -n limited
   65  kubectl describe ns limited
   66  kubectl edit quota -n limited
   67  kubectl describe ns limited
   68  kubectl scale deploy -n limited nginx --replicas=4
   69  kubectl scale deploy -n limited nginx --replicas=3
   70  kubectl describe ns limited
   71  kubectl set resources -n limited deploy nginx --requests cpu=100m,memory=5Gi --limits cpu=200m,memory=20Gi
   72  kubectl get all -n limited
   73  kubectl scale deploy -n limited nginx --replicas=0
   74  kubectl scale deploy -n limited nginx --replicas=3
   75  kubectl get all -n limited
   76  kubectl describe -n limited rs nginx-5bc7db48df
   77  history
   78  ./counter.sh 10
   79  history
   80  kubectl create deploy nginx-ex5 --image=nginx --replicas=2
   81  kubectl get all --selector app=nginx-ex5
   82  kubectl scale deployment nginx-ex5 --replicas=4
   83  kubectl get all --selector app=nginx-ex5
   84  history
   85  kubectl create deploy lab9 --image=nginx:1.14 --replicas=4 --dry-run=client -o yaml > lab9.yaml
   86  vim lab9.yaml
   87  kubectl explain deploy.spec.strategy
   88  kubectl explain --recursive deploy.spec.strategy
   89  kubectl explain deploy.spec.strategy
   90  vim lab9.yaml
   91  kubectl apply -f lab9.yaml
   92  kubectl explain deployment.spec
   93  kubectl explain deployment.spec.strategy
   94  kubectl apply -f lab9.yaml
   95  vim lab9.yaml
   96  kubectl apply -f lab9.yaml
   97  kubectl set image deploy lab9 nginx=nginx:latest
   98  kubectl rollout history deploy lab9
   99  kubectl rollout undo deploy lab9
  100  history
  101  vim nwpolicy-complete-example.yaml
  102  kubectl apply -f nwpolicy-complete-example.yaml
  103  kubectl expose pod nginx --port=80
  104  kubectl exec -it busybox -- wget --spider --timeout=1 nginx
  105  kubectl label pod busybox access=true
  106  kubectl exec -it busybox -- wget --spider --timeout=1 nginx
  107  kubectl create ns nwp-namespace
  108  vim nwp-lab9-1.yaml
  109  kubectl create -f nwp-lab9-1.yaml
  110  kubectl expose pod nwp-nginx --port=80
  111  kubectl exec -it nwp-busybox -n nwp-namespace -- wget --spider --timeout=1 nwp-nginx
  112  kubectl exec -it nwp-busybox -n nwp-namespace -- nslookup nwp-nginx
  113  kubectl exec -it nwp-busybox -n nwp-namespace -- nslookup nwp-nginx.default.svc.cluster.local
  114  kubectl exec -it nwp-busybox -n nwp-namespace -- wget --spider --timeout=1 nwp-nginx.default.svc.cluster.local
  115  vim nwp-lab9-2.yaml
  116  kubectl create -f nwp-lab9-2.yaml
  117  kubectl exec -it nwp-busybox -n nwp-namespace -- wget --spider --timeout=1 nwp-nginx.default.svc.cluster.local
  118  kubectl create deployment busybox --image=busybox -- sleep 3600
  119  kubectl exec -it busybox-6588d4995c-hwqxl -- wget --spider --timeout=1 nwp-nginx
  120  history
  121  vim lab9.yaml
  122  vim lab9ah.yaml
  123  vim lab9-ab.yaml
  124  kubectl get ns default -o yaml
  125  vim lab9.yaml
  126  ls lab*
  127  cat lesson9lab.yaml
  128  kubectl get nodes
  129  kubectl drain -h | less
  130  kubectl get pods -o wide
  131  kubectl drain worker2
  132  kubectl drain worker2 --ignore-daemonsets --force
  133  kubectl get pods -o wide
  134  #kubectl drain worker2
  135  kubectl get nodes
  136  kubectl describe node worker2 | less
  137  kubectl uncordon node worker2
  138  kubectl uncordon worker2
  139  kubectl get nodes
  140  history
  141  kubectl get nodes
  142  kubectl get pods -o wide
  143  kubectl create deploy manyginx --image=nginx --replicas=8
  144  kubectl get pods -o wide
  145  sudo ls -l /etc/kubernetes/manifests
  146  sudo less /etc/kubernetes/manifests/etcd.yaml
  147  kubectl run myweb --image=nginx --dry-run=client -o yaml
  148  kubectl get pods -o wide
  149  history
  150  kubectl get networkpolicy -A
  151  kubectl delete networkpolicy deny-from-other-namespaces
  152  kubectl delete networkpolicy access-nginx
  153  kubectl get nodes --show-labels
  154  kubectl label nodes worker2 disktype=ssd
  155  kubectl get nodes --show-labels
  156  vim selector-pod.yaml
  157  kubectl cordon worker2
  158  kubectl apply -f selector-pod.yaml
  159  kubectl delete pod nginx
  160  vim selector-pod.yaml
  161  kubectl apply -f selector-pod.yaml
  162  kubectl get pods
  163  kubectl describe pod selectornginx
  164  kubectl uncordon worker2
  165  kubectl get pods
  166  kubectl taint nodes worker1 example-key=value1:NoSchedule
  167  kubectl describe node worker1 | less
  168  kubectl create deploy nginx-taint --image=nginx --replicas=5
  169  kubectl get pods -o wide
  170  kubectl delete deploy nginx-taint
  171  vim taint-toleration.yaml
  172  kubectl apply -f taint-toleration.yaml
  173  kubectl get pods -o wide nginx-ssd
  174  kubectl get pods -o wide
  175  history
  176  kubectl explain pod.spec.toleration
  177  kubectl explain pod.spec.tolerations
  178  history
  179  vim task8.yaml
  180  kubectl apply -f task8.yaml
  181  kubectl get pvc,pv
  182  kubectl get pvc,pv -n myvol
  183  kubectl describe pod pv-pod -n myvol
  184  kubectl get pods -n myvol
  185  sudo reboot
  186  vim task8.yamk
  187  vim task8.yaml
  188  cd cka
  189  source <(kubectl completion bash)
  190  kubectl get ns
  191  kubectl get pods -n myvol
  192  kubectl delete -f task8.yaml
  193  kubectl get pv,pvc,pod -n myvol
  194  cd ..
  195  vim task8.yaml
  196  kubectl apply -f task8.yaml
  197  kubectl get pod,pvc,pv,storageclass -n myvol
  198  kubectl edit -n myvol pvc mypvc
  199  history
  200  history | grep git
  201  kubectl run faildb --image=mariadb
  202  kubectl logs faildb
  203  vim /tmp/mariadb-error.txt
  204  sudo apt install etcd-client
  205  sudo etcdctl --help
  206  sudo ETCDCTL_API=3 etcdctl --help
  207  sudo ETCDCTL_API=3 etcdctl snapshot save --help
  208  ps aux | grep etcd
  209  sudo ls -l /etc/kubernetes/pki/
  210  sudo ls -l /etc/kubernetes/pki/etcd/
  211  sudo ETCDCTL_API=3 etcdctl --endpoints=localhost:2379 --cacert /etc/kubernetes/pki/etcd/ca.crt --cert /etc/kubernetes/pki/etcd/server.crt --key /etc/kubernetes/pki/etcd/server.key get / --prefix --keys-only
  212  sudo ETCDCTL_API=3 etcdctl --endpoints=localhost:2379 --cacert /etc/kubernetes/pki/etcd/ca.crt --cert /etc/kubernetes/pki/etcd/server.crt --key /etc/kubernetes/pki/etcd/server.key snapshot save /tmp/etcdbackup.db
  213  sudo ETCDCTL_API=3 etcdctl --write-out=table snapshot status /tmp/etcdbackup.db
  214  cd cka/
  215  ./counter.sh 15
  216  history
  217  sudo ETCDCTL_API=3 etcdctl --help
  218  sudo ls -l /etc/kubernetes/pki/etcd/
  219  kubectl get deploy
  220  kubectl delete deploy manyginx
  221  cd /etc/kubernetes/manifests/
  222  ls -l
  223  sudo crictl ps
  224  sudo mv *.yaml ..
  225  ls
  226  sudo crictl ps
  227  sudo ETCDCTL_API=3 etcdctl snapshot restore /tmp/etcdbackup.db --data-dir /var/lib/etcd-backup
  228  sudo ls -l /var/lib/etcd-backup/
  229  sudo vim /etc/kubernetes/etcd.yaml
  230  sudo mv ../*.yaml .
  231  sudo crictl ps
  232  kubectl get deploy
  233  history
  234  grep HostPath -C 4 etcd.yaml
  235  sudo grep HostPath -C 4 etcd.yaml
  236  sudo grep hostPath -C 4 etcd.yaml
  237  cd
  238  kubectl edit node control
  239  kubectl create deploy manymore --image=nginx --replicas=10
  240  kubectl get pods --selector app=manymore -o wide
  241  kubectl delete deploy manymore
  242  kubectl edit node control
  243  kubectl edit node worker1
  244  kubectl create deploy manymore --image=nginx --replicas=10
  245  kubectl get pods --selector app=manymore -o wide
  246  cd cka
  247  history
  248  kubectl describe pods | grep cpu
  249  kubectl describe pods -A | grep cpu
  250  kubectl apply -f https://github.com/kubernetes-sigs/metrics-server/releases/latest/download/components.yaml
  251  kubectl -n kube-system get pods
  252  kubectl -n kube-system edit deployments.apps metrics-server
  253  kubectl -n kube-system get pods
  254  kubectl top pods
  255  kubectl top pods -A
  256  kubectl describe pods -A | grep cpu
  257  kubectl top pods
  258  history
  259  sudo -i
  260  kubectl get nodes
  261  sudo -i
  262  kubectl get nodes
  263  ./counter.sh 11
  264  vim ~/.kube/config
  265  kubectl create ns students
  266  kubectl create ns staff
  267  kubectl config get-context
  268  kubectl config get-contexts
  269  sudo useradd -m -G sudo -s /bin/bash anna
  270  sudo passwd anna
  271  su - anna
  272  vim staff-role.yaml
  273  kubectl api-resources | less
  274  vim staff-role.yaml
  275  kubectl create role -h | less
  276  kubectl apply -f staff-role.yaml
  277  kubectl get roles
  278  kubectl get roles -n staff
  279  vim rolebind.yaml
  280  kubectl create rolebinding -h | less
  281  kubectl apply -f rolebind.yaml
  282  su - anna
  283  vim students-role.yaml
  284  kubectl apply -f students-role.yaml
  285  vim rolebindstudents.yaml
  286  kubectl apply -f rolebindstudents.yaml
  287  su - anna
  288  sudo -i
  289  kubectl get ndoes
  290  kubectl get nodes
  291  sudo -i
  292  history