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sandervanvugt
parent
6fc66b67ca
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96
feb25.txt
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96
feb25.txt
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1 git clone https://github.com/sandervanvugt/cka
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2 cd cka
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3 ls
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4 ./setup-container.sh
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5 systemctl status containerd
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6 history
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7 ls
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8 ./setup-kubetools.sh
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9 sudo kubeadm init
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10 mkdir -p $HOME/.kube
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11 kubectl get all
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12 vim ~/.kube/config
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13 kubectl config view
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14 history
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15 kubectl get pods -n kube-system
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16 kubectl apply -f https://docs.projectcalico.org/manifests/calico.yaml
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17 kubectl get pods -n kube-system
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18 kubectl get nodes
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19 history
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20 kubectl kustomize https://github.com/nginxinc/nginx-gateway-fabric/config/crd/gatway-api/standard?ref=v1.5.1 | kubectl apply -f -
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21 kubectl kustomize https://github.com/nginxinc/nginx-gateway-fabric/config/crd/gateway-api/standard?ref=v1.5.1 | kubectl apply -f -
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22 helm install ngf oci://ghcr.io/nginxinc/charts/nginx-gateway-fabric --create-namespace -n nginx-gateway
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23 helm
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24 snap install helm
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25 sudo snap install helm
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26 sudo snap install helm --classic
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27 helm install ngf oci://ghcr.io/nginxinc/charts/nginx-gateway-fabric --create-namespace -n nginx-gateway
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28 kubectl get pods,svc -n nginx-gateway
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29 kubectl get gc
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30 source <(kubectl completion bash)
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31 kubectl edit -n nginx-gateway svc ngf-nginx-gateway-fabric
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32 kubectl create deploy nginxgw --image=nginx --replicas=3
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33 kubectl expose deploy nginxgw --port=80
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34 kubectl get endpoints
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35 vim http-routing.yaml
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36 kubectl apply -f http-routing.yaml
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37 sudo vim /etc/hosts
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38 kubectl -n nginx-gateway port-forward pods/ngf-nginx-gateway-fabric-cdc5dfc94-62l6x 8080:80 8443:443
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39 bg
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40 curl whatever.com:8080
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41 openssl req -x509 -nodes -days 365 -newkey rsa:2048 -keyout tls.key -out tls.crt -subj "/CN=whatever.com"
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42 kubectl create secret tls gateway-tls --cert=tls.crt --key=tls.key
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43 vim tls-gateway.yaml
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44 kubectl apply -f tls-gateway.yaml
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45 vim tls-gateway.yaml
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46 kubectl apply -f tls-gateway.yaml
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47 vim https-routing.yaml
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48 kubectl apply -f https-routing.yaml
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49 sudo apt install socat
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50 sudo socat TCP4-LISTEN:80,fork TCP4:127.0.0.1:32080 &
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51 sudo socat TCP4-LISTEN:443,fork TCP4:127.0.0.1:32443 &
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52 curl -k https://whatever.com
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53 ./counter.sh 12
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54 vim tls-gateway.yaml
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55 history
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56 kubectl create quota qtest --help | less
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57 #kubectl create quota qtest --hard pods=3,cpu=100m,memory=500Mi --namespace limited
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58 kubectl create ns limited
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59 kubectl create quota qtest --hard pods=3,cpu=100m,memory=500Mi --namespace limited
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60 kubectl describe ns limited
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61 kubectl create deploy nginx --image=nginx:latest --replicas=3 -n limited
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62 kubectl get all -n limited
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63 kubectl describe -n limited rs nginx-54c98b4f84
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64 kubectl set resources deploy nginx --requests cpu=100m,memory=5Mi --limits cpu=200m,memory=200Mi -n limited
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65 kubectl get pods -n limited
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66 kubectl describe ns limited
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67 kubectl edit quota -n limited
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68 kubectl describe ns limited
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69 kubectl explain limitrange.spec
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70 kubectl explain limitrange.spec.limits
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71 kubectl get ns
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72 vim limitrange.yaml
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73 kubectl get quota -n limited
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74 kubectl delete quota -n limited
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75 kubectl delete quota qtest -n limited
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76 kubectl apply -f limitrange.yaml -n limited
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77 kubectl describe ns limited
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78 kubectl run limitpod --image=nginx -n limited
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79 kubectl describe pod limitpod -n limiteds
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80 kubectl describe pod limitpod -n limited
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81 kubectl cordon worker1
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82 kubectl edit node worker1
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83 kubectl uncordon worker1
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84 kubectl edit node control
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85 kubectl get nodes
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86 kubectl apply -f https://github.com/kubernetes-sigs/metrics-server/releases/latest/download/components.yaml
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87 kubectl get pods -n kube-system
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88 kubectl edit deploy -n kube-system metrics-server
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89 kubectl get pods -n kube-system
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90 kubectl top pods
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91 kubectl create deploy webstress --image=nginx
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92 kubectl autoscale deploy webstress --min=2 --max=3 --cpu-percent=80
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93 kubectl get hpa
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94 kubectl autoscale deploy webstress --min=2 --max=5 --cpu-percent=80
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95 kubectl get deploy webstress
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96 history > /tmp/feb25.txt
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59
setup-kubetools-previousversion 2.sh
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59
setup-kubetools-previousversion 2.sh
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#!/bin/bash
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# kubeadm installation instructions as on
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# https://kubernetes.io/docs/setup/production-environment/tools/kubeadm/install-kubeadm/
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# this script supports Ubuntu 20.04 LTS and later only
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# run this script with sudo
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if ! [ -f /tmp/container.txt ]
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then
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echo run ./setup-container.sh before running this script
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exit 4
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fi
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# setting MYOS variable
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MYOS=$(hostnamectl | awk '/Operating/ { print $3 }')
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OSVERSION=$(hostnamectl | awk '/Operating/ { print $4 }')
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# detecting latest Kubernetes version
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KUBEVERSION=$(curl -s https://api.github.com/repos/kubernetes/kubernetes/releases/latest | jq -r '.tag_name')
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KUBEVERSION=${KUBEVERSION%.*}
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# setting previous version
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VERSION=${KUBEVERSION#*.}
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PREVIOUSVERSION=$(( VERSION - 1 ))
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PREVIOUSVERSION=v1.${PREVIOUSVERSION}
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if [ $MYOS = "Ubuntu" ]
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then
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echo RUNNING UBUNTU CONFIG
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cat <<EOF | sudo tee /etc/modules-load.d/k8s.conf
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br_netfilter
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EOF
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sudo apt-get update && sudo apt-get install -y apt-transport-https curl
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curl -fsSL https://pkgs.k8s.io/core:/stable:/${PREVIOUSVERSION}/deb/Release.key | sudo gpg --dearmor -o /etc/apt/keyrings/kubernetes-apt-keyring.gpg
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echo "deb [signed-by=/etc/apt/keyrings/kubernetes-apt-keyring.gpg] https://pkgs.k8s.io/core:/stable:/${PREVIOUSVERSION}/deb/ /" | sudo tee /etc/apt/sources.list.d/kubernetes.list
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sleep 2
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sudo apt-get update
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sudo apt-get install -y kubelet kubeadm kubectl
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sudo apt-mark hold kubelet kubeadm kubectl
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sudo swapoff -a
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sudo sed -i 's/\/swap/#\/swap/' /etc/fstab
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fi
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# Set iptables bridging
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#sudo cat <<EOF > /etc/sysctl.d/k8s.conf
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#net.bridge.bridge-nf-call-ip6tables = 1
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#net.bridge.bridge-nf-call-iptables = 1
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#EOF
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#sudo sysctl --system
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sudo crictl config --set \
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runtime-endpoint=unix:///run/containerd/containerd.sock
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echo 'after initializing the control node, follow instructions and use kubectl apply -f https://docs.projectcalico.org/manifests/calico.yaml to install the calico plugin (control node only). On the worker nodes, use sudo kubeadm join ... to join'
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