CKAD march22 day2

root@control:/etc/kubernetes/pki# history
    1  git clone https://github.com/sandervanvugt/cka
    2  cd cka
    3  ls
    4  vim setup-container.sh
    5  ./setup-container.sh
    6  ./setup-kubetools.sh
    7  kubeadm init
    8  vim /tmp/todo.txt
    9  exit
   10  kubeadm token create --help
   11  kubeadm token create --print-join-command
   12  exit
   13  cd /etc/kubernetes/manifests/
   14  ls
   15  exit
   16  etcdctl --help
   17  etcdctl --help | less
   18  ETCDCTL_APT=3 etcdctl -h | less
   19  ETCDCTL_API=3 etcdctl -h | less
   20  ETCDCTL_API=3 etcdctl snapshot save mysnap.bak
   21  ps aux | grep etcd
   22  #ETCDCTL_API=3 etcdctl snapshot --endpoints=127.0.0.1:2379 save mysnap.bak
   23  cd /etc/kubernetes/pki/
   24  ls
   25  ETCDCTL_API=3 etcdctl --endpoints=https://127.0.0.1:2379 --cacert="/etc/kubernetes/pki/etcd/ca.crt" --cert="/etc/kubernetes/pki/apiserver-etcd-client.crt" --key="/etc/kubernetes/pki/apiserver-etcd-client.key" snapshot save /tmp/etcd-backup
   26  history


student@control:~/cka$ history
    1  cat /etc/hosts
    2  free -m
    3  sudo vim /etc/fstab
    4  swapoff /swap.img
    5  sudo swapoff /swap.img
    6  free -m
    7  sudo -i
    8  sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
    9  sudo chown $(id -u):$(id -g) $HOME/.kube/config
   10  kubectl get all
   11  kubectl apply -f https://docs.projectcalico.org/manifests/calico.yaml
   12  kubectl get ns
   13  kubectl get pods -A
   14  cat /tmp/todo.txt
   15  kubectl get nodes
   16  history
   17  git clone https://github.com/sandervanvugt/cka
   18  cka/counter.sh 15
   19  cd cka
   20  ls
   21  ./counter.sh 15
   22  sudo -i
   23  kubectl get nodes
   24  history
   25  wget https://docs.projectcalico.org/manifests/calico.yaml
   26  vim calico.yaml
   27  kubectl get daemonset
   28  kubectl get daemonset -A
   29  kubectl get pods -A
   30  kubectl get pods -A -o wide
   31  kubectl get pods -A -o wide |  grep calico
   32  history
   33  kubectl create ns mynamespace
   34  kubectl run alpine --image=alpine -- sleep 3600 -n mynamespace
   35  kubectl get pods -A
   36  kubectl run alpine --image=alpine -n mynamespace -- sleep 3600
   37  kubectl get pods -A
   38  kubectl completion -h
   39  source <(kubectl completion bash)
   40  kubectl describe pod alpine
   41  kubectl logs alpine
   42  kubectl run alpine --image=alpine -- sleep 3600 -n mynamespace
   43  kubectl delete pod alpine
   44  ./counter.sh 15
   45  vim bi-doesnwork.yaml
   46  kubectl create -f bi-doesnwork.yaml
   47  kubectl get all
   48  kubectl get pods -A
   49  history | grep calico
   50  ./counter.sh 5
   51  vim knabc.yaml
   52  vim ex4.yaml
   53  kubectl run blah --image=busybox --dry-run=client -o yaml -- mkdir /data; touch /data/myfile.txt
   54  kubectl run blah --image=busybox --dry-run=client -o yaml -- "mkdir /data; touch /data/myfile.txt"
   55  vim ex4.yaml
   56  kubectl create -f ex4.yaml
   57  kubectl get pods
   58  kubectl delete -f ex4.yaml
   59  vim ex4.yaml
   60  kubectl create -f ex4.yaml
   61  kubectl get pods
   62  kubectl describe pod init-demo
   63  vim ex4.yaml
   64  kubectl delete pod init-demo
   65  kubectl create -f ex4
   66  kubectl create -f ex4.yaml
   67  kubectl get pods
   68  kubectl describe pod init-demo
   69  kubectl delete pod init-demo
   70  vim ex4.yaml
   71  kubectl create -f ex4.yaml
   72  kubectl get pods
   73  kubectl describe pod init-demo
   74  kubectl delete pod init-demo
   75  vim ex4.yaml
   76  kubectl create -f ex4.yaml
   77  kubectl get pods
   78  kubectl delete pod init-demo
   79  vim ex4.yaml
   80  kubectl create -f ex4.yaml
   81  kubectl get pods
   82  vim ex4.yaml
   83  kubectl describe pod init-demo
   84  vim ex4.yaml
   85  kubectl delete pod init-demo
   86  kubectl create -f ex4.yaml
   87  kubectl get pods
   88  vim ex4.yaml
   89  ./counter.sh 18
   90  ./counter.sh 7
   91  sudo -i
   92  kubectl get pods
   93  kubectl --help | less
   94  kubectl cordon --help | less
   95  kubectl drain --help | less
   96  kubectl get pods -A
   97  kubectl get pods -A -o wide
   98  kubectl drain worker2
   99  kubectl drain worker2 --ignore-daemonsets --force
  100  kubectl get pods -o wide -A
  101  kubectl describe node worker2
  102  kubectl describe node worker2 | less
  103  kubectl get nodes
  104  kubectl uncordon worker2
  105  ./counter.sh 12
  106  ./counter.sh 5
  107  kubectl get nodes
  108  ls -l ~/.kube/
  109  sudo cp /etc/kubernetes/admin.conf ~/.kube/config
  110  ls -l ~/.kube/
  111  chown student:student ~/.kube/config
  112  sudo chown student:student ~/.kube/config
  113  ls -l ~/.kube/
  114  kubectl get nodes
  115  kubectl edit node control
  116  kubectl create deploy --image=nginx --replicas=3 tttest
  117  kubectl get pods -o wide
  118  kubectl config view
  119  vim ~/.kube/config
  120  kubectl label nodes worker2 disktype=ssd
  121  kubectl get nodes --show-labels
  122  vim selector-pod.yaml
  123  kubectl apply -f selector-pod.yaml
  124  kubectl get pods -o wide
  125  kubectl delete pod nginx
  126* kubectl label node worker2 disktype=ssd
  127  kubectl edit node worker2
  128  kubectl apply -f selector-pod.yaml
  129  kubectl get pods
  130  kubectl describe pod nginx
  131  kubectl label nodes worker2 disktype=ssd
  132  kubectl get pods
  133  kubectl get daemonset
  134  kubectl get daemonset -A
  135  kubectl get daemonset -n kube-system calico-node -o yaml | less
  136  kubectl taint nodes worker1 example-key=value1:NoSchedule
  137  kubectl describe nodes worker1 | less
  138  kubectl create deploy nginx-taint --image=nginx --replicas=3
  139  kubectl get pods --selector app=nginx-taint
  140  kubectl get pods --selector app=nginx-taint -o wide
  141  vim taint-toleration.yaml
  142  kubectl create -f taint-toleration.yaml
  143  kubectl get pods -o wide | grep tolera
  144  kubectl get pods -o wide
  145  ./counter.sh 5
  146  kubectl edit node worker1
  147  history
  148  https://github.com/kubernetes-sigs/metrics-server
  149  cd
  150  git clone https://github.com/kubernetes-sigs/metrics-server
  151  cd metrics-server/
  152  ls
  153  less README.md
  154  cd manifests/
  155  ls
  156  cd base/
  157  vim
  158  vim deployment.yaml
  159  kubectl create -f .
  160  kubectl get pods -n kube-system
  161  kubectl top pods
  162  cd cka
  163  ./counter.sh 5
  164  kubectl create deploy nginx-ds --image=nginx --dry-run=client -o yaml nginx-ds.yaml
  165  kubectl create deploy nginx-ds --image=nginx --dry-run=client -o yaml >nginx-ds.yaml
  166  vim nginx-ds.yaml
  167  kubectl create -f nginx-ds.yaml
  168  vim nginx-ds.yaml
  169  kubectl create -f nginx-ds.yaml
  170  vim newds.yaml
  171  kubectl create -f newds.yaml
  172  kubectl create -f nginx-ds.yaml  --validate=false
  173  kubectl get ds,pods
  174  kubectl get ds,pods -o wide
  175  kubectl top pods
  176  history
  177  kubectl top pods
  178  kubectl get all -n kube-system
  179  kubectl describe svc -n kube-system metrics-server
  180  kubectl -n kube-system get pods --show-labels
  181  kubectl describe svc kubernetes
  182  kubectl get svc kubernetes -o yaml
  183  kubectl edit -n kube-system svc metrics-server
  184  kubectl describe svc -n kube-system metrics-server
  185  kubectl get svc kubernetes -o yaml
  186  kubectl get all
  187  kubectl expose deployment nginx-taint --port=80
  188  kubectl get svc nginx-taint -o yaml
  189  kubectl get svc kubernetes -o yaml
  190  kubectl edit -n kube-system svc metrics-server
  191  kubectl describe svc -n kube-system metrics-server
  192  kubectl top pods
  193  history
  194  kubectl get svc -n kube-system -o yaml
  195  vim nwpolicy-complete-example.yaml
  196  kubectl apply -f nwpolicy-complete-example.yaml
  197  kubectl delete -f nwpolicy-complete-example.yaml
  198  kubectl get pods
  199  kubectl apply -f nwpolicy-complete-example.yaml
  200  kubectl expose pod nginx --port=80
  201  kubectl exec -it busybox -- wget --spider --timeout=1 nginx
  202  kubectl get pods busybox --show-labels
  203  kubectl label pod busybox access=true
  204  kubectl exec -it busybox -- wget --spider --timeout=1 nginx
  205  ls
  206  kubectl create ns nwp-namespace
  207  vim nwp-lab11-1.yaml
  208  kubectl create -f nwp-lab11-1.yaml
  209  kubectl expose pod nwp-nginx --port=80
  210  kubectl exec -it nwp-busybox -n nwp-namespace -- wget --spider --timeout=1 nwp-nginx
  211  kubectl exec -it nwp-busybox -n nwp-namespace -- nslookup nwp-nginx
  212  kubectl exec -it nwp-busybox -n nwp-namespace -- wget --spider --timeout=1 nwp-nginx.default.svc.cluster.local
  213  vim nwp-lab11-2.yaml
  214  kubectl create -f nwp-lab11-2.yaml
  215  kubectl exec -it nwp-busybox -n nwp-namespace -- wget --spider --timeout=1 nwp-nginx.default.svc.cluster.local
  216  kubectl create deploy busybox --image=busybox -- sleep 3600
  217  kubectl exec -it busybox-669745485f-dqwft -- wget --spider --timeout=1 nwp-nginx
  218  ./counter.sh 18
  219  kubectl apply -f nwpolicy-complete-example.yaml
  220  kubectl describe networkpolicy access-nginx
  221  vim nwp-lab11-1.yaml
  222  kubectl exec -it nwp-busybox -n nwp-namespace -- wget --spider --timeout=1 nwp-nginx.default.svc.cluster.local
  223  kubectl get networkpolicy
  224  kubectl delete nwp access-nginx
  225  kubectl delete networkpolicy access-nginx
  226  kubectl exec -it nwp-busybox -n nwp-namespace -- wget --spider --timeout=1 nwp-nginx.default.svc.cluster.local
  227  vim nwp-lab11-2.yaml
  228  kubectl create -f nwp-lab11-2.yaml
  229  kubectl exec -it nwp-busybox -n nwp-namespace -- wget --spider --timeout=1 nwp-nginx.default.svc.cluster.local
  230  vim nwp-lab11-2.yaml
  231  kubectl get pods -o wide --sort-by=.spec.nodeName
  232  kubectl create -h
  233  kubectl create -h | less
  234  kubectl create quota -h | less
  235  kubectl create ns limited
  236  kubectl create quota qtest --hard pods=3,cpu=100m,memory=500Mi -n limited
  237  kubectl describe ns limited
  238  kubectl describe quota -n limited
  239  kubectl get quota -A
  240  kubectl create deploy qginx --image=nginx --replicas=3 -n limited
  241  kubectl get all -n limited
  242  kubectl describe rs -n limited qginx-844f68fd9c
  243  kubectl set -h | less
  244  kubectl set resources -h | less
  245  kubectl set resources -n limited deploy qginx --requests cpu=100m,memory=5Mi --limits cpu=200m,memory=20Mi
  246  kubectl get all -n limited
  247  kubectl describe -n limited rs qginx-5457b94959
  248  kubectl edit -n limited quota qtest
  249  kubectl get all -n limited
  250  history
  251  ./counter.sh 12
  252  ./counter.sh 7
  253  TCDCTL_API=3 etcdctl --endpoints=https://127.0.0.1:2379   --cacert=<trusted-ca-file> --cert=<cert-file> --key=<key-file>   snapshot save <backup-file-location>
  254  etcdctl
  255  sudo apt install etcd-client
  256  sudo -i
  257  history