history-15Oct24.txt

    1  git clone https://github.com/sandervanvugt/cka
    2  cd cka
    3  ls
    4  ./setup-container.sh 
    5  ls
    6  ./setup-kubetools.sh 
    7  history
    8  sudo kubeadm init
    9  cd
   10  mkdir -p $HOME/.kube
   11  kubectl get all
   12  kubectl get pods -n kube-system
   13  source <(kubectl completion bash)
   14  kubectl describe -n kube-system pod coredns-7c65d6cfc9-z5rsc 
   15  kubectl apply -f https://docs.projectcalico.org/manifests/calico.yaml
   16  kubectl get pods -n kube-system
   17  history
   18  kubectl get nodes
   19  kubectl describe node control 
   20  history
   21  cd cka/
   22  ./counter.sh 12
   23  kubectl get nodes
   24  sudo apt install helm
   25  helm
   26  cd ..
   27  ls
   28  tar xvf helm-v3.16.2-linux-arm64.tar.gz 
   29  sudo cp linux-arm64/helm /usr/local/bin
   30  helm upgrade --install ingress-nginx ingress-nginx --repo https://kubernetes.github.io/ingress-nginx --namespace ingress-nginx --create-namespace
   31  kubectl get all -n ingress-nginx 
   32  history
   33  kubectl create deploy nginxsvc --image=nginx --port=80
   34  kubectl expose deploy nginxsvc
   35  kubectl get all --selector app=nginxsvc
   36  kubectl create ingress nginxsvc --class=nginx --rule=nginxsvc.info/*=nginxsvc:80
   37  kubectl port-forward -n ingress-nginx svc/ingress-nginx-controller 8080:80
   38  bg
   39  sudo sh -c 'echo "127.0.0.1 nginxsvc.info" >> /etc/hosts'
   40  cat /etc/hosts
   41  curl nginxsvc.info:8080
   42  kubectl create ing -h | less
   43  history
   44  kubectl get all -n ingress-nginx 
   45  kubectl edit -n ingress-nginx svc ingress-nginx-controller
   46  kubectl get all -n ingress-nginx 
   47  cd cka
   48  ./counter.sh 1
   49  history
   50  kubectl edit svc nginxsvc 
   51  kubectl describe ingress nginxsvc 
   52  kubectl describe svc nginxsvc 
   53  kubectl edit svc nginxsvc 
   54  kubectl describe svc nginxsvc 
   55  kubectl describe node control | less
   56  df -h
   57  kubectl create ns limited
   58  kubectl create quota qtest --hard pods=3,cpu=100m,memory=500Mi
   59  kubectl get pods
   60  kubectl scale deploy nginxsvc --replicas=5
   61  kubectl get all
   62  kubectl delete quota qtest 
   63  kubectl scale deploy nginxsvc --replicas=5 -n limited
   64  kubectl create quota qtest --hard pods=3,cpu=100m,memory=500Mi -n limited
   65  kubectl describe quota -n limited 
   66  kubectl create deploy nginx --image=nginx --replicas=3 -n limited
   67  kubectl get all -n limited
   68  kubectl describe rs nginxsvc-7f8cdcb4db 
   69  kubectl get all -n limited 
   70  kubectl -n limited describe rs nginx-676b6c5bbc 
   71  history
   72  kubectl -n limited set resources deploy nginx --requests cpu=100m,memory=5Mi --limits cpu=200m,memory=20m
   73  kubectl -n limited set resources deploy nginx --requests cpu=100m,memory=20Mi --limits cpu=200m,memory=40m
   74  kubectl -n limited set resources deploy nginx --requests cpu=100m,memory=20Mi --limits cpu=200m,memory=40Mi
   75  kubectl get pods -n limited
   76  kubectl get all -n limited
   77  kubectl scale -n limited deploy nginx --replicas=4
   78  kubectl scale -n limited deploy nginx --replicas=3
   79  kubectl get all -n limited
   80  kubectl describe -n limited quota qtest 
   81  kubectl edit quota -n limited qtest 
   82  kubectl get all -n limited
   83  kubectl scale -n limited deploy nginx --replicas=3
   84  kubectl get all -n limited
   85  kubectl describe -n limited quota qtest 
   86  kubectl scale -n limited deploy nginx --replicas=2
   87  kubectl get all -n limited
   88  kubectl scale -n limited deploy nginx --replicas=3
   89  kubectl get all -n limited
   90  history
   91  kubectl create ns limited
   92  vim limitrange.yaml 
   93  kubectl apply -f limitrange.yaml -n limited 
   94  kubectl describe ns limited 
   95  kubectl run limitpod --image=nginx -n limited
   96  kubectl -n limited delete quota
   97  kubectl -n limited delete quota qtest 
   98  kubectl run limitpod --image=nginx -n limited
   99  kubectl describe -n limited pod limitpod 
  100  history
  101  kubectl get pods -A -o wide
  102  kubectl get pods -o wide
  103  kubectl create deploy testdeploy --image=nginx --replicas=6
  104  kubectl get pods -o wide
  105  kubectl drain worker2
  106  kubectl drain worker2 --ignore-daemonsets --force
  107  kubectl get pods
  108  kubectl get pods -o wide
  109  kubectl get nodes
  110  kubectl describe node worker2
  111  kubectl edit node worker2
  112  kubectl uncordon worker2
  113  kubectl get pods -o wide
  114  kubectl create newweb --image=nginx --replicas=20
  115  kubectl create deploy newweb --image=nginx --replicas=20
  116  kubectl get pods -o wide
  117  kubectl delete deploy newweb 
  118  history
  119  sudo ls -l /etc/kubernetes/manifests
  120  kubectl run staticpod --image=nginx --dry-run=client -o yaml
  121  kubectl get pods
  122  sudo -i
  123  history >> /tmp/history-14Oct24.txt
  124  vim /tmp/history-14Oct24.txt 
  125  kubectl config view
  126  kubectl api-resources | grep -i networkp
  127  vim nwpolicy-complete-example.yaml 
  128  kubectl apply -f nwpolicy-complete-example.yaml 
  129  kubectl expose pod nginx --port=80
  130  kubectl get svc
  131  kubectl exec -it busybox -- wget --spider --timeout=1 nginx
  132  vim nwpolicy-complete-example.yaml 
  133  kubectl lab pod busybox access=true
  134  kubectl label pod busybox access=true
  135  kubectl exec -it busybox -- wget --spider --timeout=1 nginx
  136  history
  137  kubectl create ns new-namespace
  138  kubectl create ns nwp-namespace
  139  vim nwp-lab9-1.yaml 
  140  kubectl create -f nwp-lab9-1.yaml 
  141  kubectl expose pod nwp-nginx --port=80
  142  kubectl exec -it nwp-busybox -n nwp-namespace -- wget --spider --timeout=1 nwp-nginx
  143  kubectl exec -it nwp-busybox -n nwp-namespace -- nslookup nwp-nginx
  144  kubectl exec -it nwp-busybox -n nwp-namespace -- wget --spider --timeout=1 nwp-nginx.default.svc.cluster.local
  145  vim nwp-lab9-2.yaml 
  146  kubectl exec -it nwp-busybox -n nwp-namespace -- wget --spider --timeout=1 nwp-nginx.default.svc.cluster.local
  147  kubectl apply -f nwp-lab9-2.yaml 
  148  kubectl exec -it nwp-busybox -n nwp-namespace -- wget --spider --timeout=1 nwp-nginx.default.svc.cluster.local
  149  kubectl create deploy busybox --image=busybox --sleep 3600
  150  kubectl create deploy busybox --image=busybox -- sleep 3600
  151  kubectl exec -it busybox-75cd85d546-wd6wq -- wget --spider --timeout=1 nwp-nginx
  152  kubectl get netpol
  153  kubectl delete netpol access-nginx 
  154  kubectl delete netpol deny-from-other-namespaces 
  155  history
  156  kubectl top pods
  157  kubectl top node
  158  kubectl apply -f https://github.com/kubernetes-sigs/metrics-server/releases/latest/download/components.yaml
  159  kubectl -n kube-system get pods
  160  kubectl edit -n kube-system deployments.apps metrics-server 
  161  kubectl -n kube-system get pods
  162  kubectl top pods
  163  history
  164  kubectl get quota
  165  kubectl create quota -h | less
  166  #kubectl create quota my-quota --hard=cpu=1,memory=1G,pods=2,services=3,replicationcontrollers=2,resourcequotas=1,secrets=5,persistentvolumeclaims=10
  167  kubectl create quota one --hard=cpu=1
  168  kubectl create quota two --hard=memory=4G
  169  kubectl create quota three --hard=cpu=2
  170  kubectl describe ns default 
  171  kubectl delete quota one two three
  172  kubectl top -h | less
  173  kubectl top pod -h | less
  174  kubectl top pod -A --sort-by="memory"
  175  history
  176  kubectl run testpox --image=nginx --dry-run=client -o yaml
  177  kubectl get pods
  178  history
  179  kubectl get pods
  180  sudo apt install etcd-client
  181  sudo etcdctl --help
  182  sudo ETCDCTL_API=2 etcdctl --help
  183  sudo ETCDCTL_API=3 etcdctl --help
  184  ps aux | grep 2379
  185  sudo etcdctl --endpoints=localhost:2379 --cacert /etc/kubernetes/pki/etcd/ca.rt --cert /etc/kubernetes/pki/etcd/server.crt --key /etc/kubernetes/pki/etcd/server.key get / --prefix --keys-only
  186  sudo 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
  187  sudo 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
  188  ls -l /tmp/etcdbackup.db 
  189  sudo etcdctl --write-out=table snapshot status /tmp/etcdbackup.db 
  190  cp /tmp/etcdbackup.db /tmp/etcdbackup.db.2
  191  sudo cp /tmp/etcdbackup.db /tmp/etcdbackup.db.2
  192  history
  193  kubectl get deploy
  194  kubectl delete deploy --all
  195  kubectl get deploy
  196  cd /etc/kubernetes/manifests/
  197  ls
  198  sudo mv * ..
  199  sudo dnf install tree
  200  sudo apt install tree
  201  sudo tree /var/lib/etcd
  202  sudo mv /var/lib/etcd /var/lib/etcd-backup
  203  sudo tree /var/lib/etcd
  204  sudo etcdctl snapshot restore /tmp/etcdbackup.db --data-dir /var/lib/etcd
  205  sudo tree /var/lib/etcd
  206  sudo mv ../*.yaml .
  207  sudo crictl ps 
  208  kubectl get deploy
  209  kubectl get pods
  210  kubectl delete deploy testdeploy 
  211  history
  212  kubectl get nodes
  213* 
  214  cd
  215  vim nodesel.yam;l
  216  vim nodesel.yaml
  217  kubectl apply -f nodesel.yaml 
  218  kubectl get pods -o yaml
  219  kubectl get pods -o wide
  220  vim nodesel.yaml
  221  kubectl apply -f nodesel.yaml 
  222  kubectl get pods
  223  kubectl describe pod islectnginxxxxxx 
  224  kubectl get deploy
  225  kubectl get pods
  226  kubectl delete pods --force --timeout=0 testdeploy-7cd7d7ddc8-28mcq testdeploy-7cd7d7ddc8-fqh6v testdeploy-7cd7d7ddc8-ftk48 testdeploy-7cd7d7ddc8-pd7sd testdeploy-7cd7d7ddc8-stj67 testdeploy-7cd7d7ddc8-stxsx 
  227  kubectl get pods
  228  history
  229  kubectl get node control -o yaml | less
  230  kubectl get ds -A
  231  kubectl get ds -n kube-system kube-proxy -o yaml | less
  232  kubectl get ds -n kube-system calico-node -o yaml | less
  233  history
  234  kubectl taint nodes worker1 storage=ssd:NoSchedule
  235  kubectl describe node worker1
  236  kubectl create deploy nginx-taint --image=nginx --replicas=3
  237  kubectl get pods -o wide
  238  cd cka/
  239  vim taint-toleration.yaml 
  240  kubectl apply -f taint-toleration.yaml 
  241  kubectl get pods -o wide | grep tole
  242  vim taint-toleration2.yaml 
  243  kubectl apply -f taint-toleration2.yaml 
  244  kubectl get pods -o wide | grep hdd
  245  vim taint-toleration2.yaml 
  246  kubectl apply -f taint-toleration2.yaml 
  247  vim taint-toleration2.yaml 
  248  kubectl apply -f taint-toleration2.yaml 
  249  kubectl get pods -o wide | grep exists
  250  history
  251  vim ~/.kube/config 
  252  kubectl get sa
  253  kubectl get sa -n kube-system
  254  kubectl create role -h | less
  255  kubectl create rolebinding -h | less
  256  kubectl run mypod --image=alpine -- sleep 3600
  257  kubectl get pods mypod -o yaml | less
  258  kubectl exec -it mypod -- sh
  259  historyt
  260  history
  261  kubectl create sa mysa
  262  kubectl create role list-pods --resource=pods --verbs=list
  263  kubectl create role list-pods --resource=pods --verb=list
  264  kubectl describe role list-pods 
  265  kubectl create rolebinding list-pods --role=list-pods --serviceaccount=default:default
  266  vim mysapod.yaml 
  267  kubectl apply -f mysapod.yaml 
  268  kubectl exec -it mysapod -- sh
  269  ls *role*
  270  grep -li 'type=role' *
  271  kubectl get rolebindings
  272  kubectl create rolebinding list-pods --role=list-pods --serviceaccount=default:mysa
  273  kubectl delete rolebindings.rbac.authorization.k8s.io list-pods
  274  kubectl create rolebinding list-pods --role=list-pods --serviceaccount=default:mysa
  275  kubectl exec -it mysapod -- sh
  276  kubectl get pods
  277  kubectl delete pod mysapod 
  278  kubectl delete pod mysapod --force --timeout=1
  279  kubectl delete pod mysapod --force --timeout=0
  280  kubectl apply -f mysapod.yaml 
  281  kubectl exec -it mysapod -- sh
  282  history > /tmp/history-15Oct24.txt