diff --git a/feb25.txt b/feb25.txt new file mode 100644 index 0000000..e874de1 --- /dev/null +++ b/feb25.txt @@ -0,0 +1,96 @@ + 1 git clone https://github.com/sandervanvugt/cka + 2 cd cka + 3 ls + 4 ./setup-container.sh + 5 systemctl status containerd + 6 history + 7 ls + 8 ./setup-kubetools.sh + 9 sudo kubeadm init + 10 mkdir -p $HOME/.kube + 11 kubectl get all + 12 vim ~/.kube/config + 13 kubectl config view + 14 history + 15 kubectl get pods -n kube-system + 16 kubectl apply -f https://docs.projectcalico.org/manifests/calico.yaml + 17 kubectl get pods -n kube-system + 18 kubectl get nodes + 19 history + 20 kubectl kustomize https://github.com/nginxinc/nginx-gateway-fabric/config/crd/gatway-api/standard?ref=v1.5.1 | kubectl apply -f - + 21 kubectl kustomize https://github.com/nginxinc/nginx-gateway-fabric/config/crd/gateway-api/standard?ref=v1.5.1 | kubectl apply -f - + 22 helm install ngf oci://ghcr.io/nginxinc/charts/nginx-gateway-fabric --create-namespace -n nginx-gateway + 23 helm + 24 snap install helm + 25 sudo snap install helm + 26 sudo snap install helm --classic + 27 helm install ngf oci://ghcr.io/nginxinc/charts/nginx-gateway-fabric --create-namespace -n nginx-gateway + 28 kubectl get pods,svc -n nginx-gateway + 29 kubectl get gc + 30 source <(kubectl completion bash) + 31 kubectl edit -n nginx-gateway svc ngf-nginx-gateway-fabric + 32 kubectl create deploy nginxgw --image=nginx --replicas=3 + 33 kubectl expose deploy nginxgw --port=80 + 34 kubectl get endpoints + 35 vim http-routing.yaml + 36 kubectl apply -f http-routing.yaml + 37 sudo vim /etc/hosts + 38 kubectl -n nginx-gateway port-forward pods/ngf-nginx-gateway-fabric-cdc5dfc94-62l6x 8080:80 8443:443 + 39 bg + 40 curl whatever.com:8080 + 41 openssl req -x509 -nodes -days 365 -newkey rsa:2048 -keyout tls.key -out tls.crt -subj "/CN=whatever.com" + 42 kubectl create secret tls gateway-tls --cert=tls.crt --key=tls.key + 43 vim tls-gateway.yaml + 44 kubectl apply -f tls-gateway.yaml + 45 vim tls-gateway.yaml + 46 kubectl apply -f tls-gateway.yaml + 47 vim https-routing.yaml + 48 kubectl apply -f https-routing.yaml + 49 sudo apt install socat + 50 sudo socat TCP4-LISTEN:80,fork TCP4:127.0.0.1:32080 & + 51 sudo socat TCP4-LISTEN:443,fork TCP4:127.0.0.1:32443 & + 52 curl -k https://whatever.com + 53 ./counter.sh 12 + 54 vim tls-gateway.yaml + 55 history + 56 kubectl create quota qtest --help | less + 57 #kubectl create quota qtest --hard pods=3,cpu=100m,memory=500Mi --namespace limited + 58 kubectl create ns limited + 59 kubectl create quota qtest --hard pods=3,cpu=100m,memory=500Mi --namespace limited + 60 kubectl describe ns limited + 61 kubectl create deploy nginx --image=nginx:latest --replicas=3 -n limited + 62 kubectl get all -n limited + 63 kubectl describe -n limited rs nginx-54c98b4f84 + 64 kubectl set resources deploy nginx --requests cpu=100m,memory=5Mi --limits cpu=200m,memory=200Mi -n limited + 65 kubectl get pods -n limited + 66 kubectl describe ns limited + 67 kubectl edit quota -n limited + 68 kubectl describe ns limited + 69 kubectl explain limitrange.spec + 70 kubectl explain limitrange.spec.limits + 71 kubectl get ns + 72 vim limitrange.yaml + 73 kubectl get quota -n limited + 74 kubectl delete quota -n limited + 75 kubectl delete quota qtest -n limited + 76 kubectl apply -f limitrange.yaml -n limited + 77 kubectl describe ns limited + 78 kubectl run limitpod --image=nginx -n limited + 79 kubectl describe pod limitpod -n limiteds + 80 kubectl describe pod limitpod -n limited + 81 kubectl cordon worker1 + 82 kubectl edit node worker1 + 83 kubectl uncordon worker1 + 84 kubectl edit node control + 85 kubectl get nodes + 86 kubectl apply -f https://github.com/kubernetes-sigs/metrics-server/releases/latest/download/components.yaml + 87 kubectl get pods -n kube-system + 88 kubectl edit deploy -n kube-system metrics-server + 89 kubectl get pods -n kube-system + 90 kubectl top pods + 91 kubectl create deploy webstress --image=nginx + 92 kubectl autoscale deploy webstress --min=2 --max=3 --cpu-percent=80 + 93 kubectl get hpa + 94 kubectl autoscale deploy webstress --min=2 --max=5 --cpu-percent=80 + 95 kubectl get deploy webstress + 96 history > /tmp/feb25.txt diff --git a/setup-kubetools-previousversion 2.sh b/setup-kubetools-previousversion 2.sh new file mode 100755 index 0000000..ec69a20 --- /dev/null +++ b/setup-kubetools-previousversion 2.sh @@ -0,0 +1,59 @@ +#!/bin/bash +# kubeadm installation instructions as on +# https://kubernetes.io/docs/setup/production-environment/tools/kubeadm/install-kubeadm/ + +# this script supports Ubuntu 20.04 LTS and later only +# run this script with sudo + +if ! [ -f /tmp/container.txt ] +then + echo run ./setup-container.sh before running this script + exit 4 +fi + +# setting MYOS variable +MYOS=$(hostnamectl | awk '/Operating/ { print $3 }') +OSVERSION=$(hostnamectl | awk '/Operating/ { print $4 }') + +# detecting latest Kubernetes version +KUBEVERSION=$(curl -s https://api.github.com/repos/kubernetes/kubernetes/releases/latest | jq -r '.tag_name') +KUBEVERSION=${KUBEVERSION%.*} + +# setting previous version +VERSION=${KUBEVERSION#*.} +PREVIOUSVERSION=$(( VERSION - 1 )) +PREVIOUSVERSION=v1.${PREVIOUSVERSION} + + +if [ $MYOS = "Ubuntu" ] +then + echo RUNNING UBUNTU CONFIG + cat < /etc/sysctl.d/k8s.conf +#net.bridge.bridge-nf-call-ip6tables = 1 +#net.bridge.bridge-nf-call-iptables = 1 +#EOF +#sudo sysctl --system + +sudo crictl config --set \ + runtime-endpoint=unix:///run/containerd/containerd.sock +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' + +