jan20-live-class-student-history.txt

# this is an unedited copy of the student history file used in the
# live class I've done on Jan. 16/17 2020. Use at your own risk

mkdir -p .kube
sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
exit
sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
sudo chown $(id -u):$(id -g) $HOME/.kube/config
cd .kube/
ls -l
cat config 
kubectl get all
kubectl get nodes
cd
kubectl get pods -n kube-system
kubectl apply -f "https://cloud.weave.works/k8s/net?k8s-version=$(kubectl version | base64 | tr -d '\n')"
kubectl get pods -n kube-system
sysctl -a | grep bridge-nf-call-iptables
exit
kubectl get nodes
ssh root@worker2
ssh root@worker3
kubectl get nodes
exit
cat /etc/hosts
su -
kubectl api-resources
kubectl api-resources | less
kubectl get ns 
kubectl create namespace mynamespace
kubectl create -h | less
kubectl create namespace -h
kubect get ns
kubectl get ns
kubectl explain pod
kubectl explain pod.metadata
git clone https://github.com/sandervanvugt/cka
cd cka
ls
vim ex1.yaml
kubectl create -f ex1.yaml 
kubectl get pods
kubectl get pods -n mynamespace
kubectl get pods --all-namespaces
kubectl completion bash > ~/.kube/completion.bash.inc
history
cat ex1.yaml 
kubectl create deployment --image=busybox
kubectl create deployment failin --image=busybox
kubectl get pods
vim exam.txt
./counter.sh 10
vim ex4.yaml
kubectl create -f ex4.yaml 
vim ex4.yaml
kubectl create -f ex4.yaml 
vim ex4.yaml
kubectl create -f ex4.yaml 
cat ex4.yaml 
vim ex4.yaml 
kubectl get pods
kubectl describe pods myapp-pod
cp ex4.yaml ex4b.yaml
vim ex4b.yaml 
kubectl create -f ex4b.yaml; kubectl get pods
kubectl get pods
ls
cat ex1.yaml 
kubectl create deploy nginx-ex5 --image=nginx --replicas=5
kubectl run deploy nginx-ex5 --image=nginx --replicas=5
kubectl create deploy nginx-ex5b --image=nginx 
kubectl edit deploy nginx-ex5b
kubectl get pods
kubectl scale deployment nginx-ex5b --replicas=5
kubectl run mydeploy --image busybox --command sleep 10000 --replicas 3 --dry-run -o yaml > mydep.yaml
vim mydep.yaml 
kubectl create -f mydep.yaml 
vim mydep.yaml 
kubectl get all --selector run=mydeploy
kubectl delete deployment mydeploy
history
kubectl get nodes
kubectl explain pod.spec | less
kubectl explain pod.spec.volumes | less
cd cka/
ls
cd ..
git clone https://github.com/sandervanvugt/ckad
cd ckad/
ls
vim pv.yaml 
kubectl create -f pv.yaml 
kubectl get pv
vim pvc.yaml 
kubectl create -f pvc.yaml 
kubectl get pvc
kubectl get pv
vim pv-pod.yaml 
kubectl explain pv.spec
kubectl explain pv.spec.emptydir
kubectl explain pod.spec.volumes.emptydir
kubectl explain pod.spec.volumes.emptyDir
kubectl explain pv.spec.emptyDir
vim pv.yaml 
kubectl create -f pv.yaml 
vim pv.yaml
kubectl get pv
kubectl get pv pv-volume -o yaml > ex7.yaml
vim ex7.yaml 
kubectl create -f ex7.yaml 
kubectl get pv emtpy-volume -o yaml
kubectl explain persistentvolume.spec.persistentvolumereclaimpolicy
kubectl explain persistentvolume.spec.persistentVolumeReclaimPolicy
vim pv-pod.yaml 
kubectl create secret generic ex8-secret --from-literal=userpw=s3crt3tPW
kubectl get secret ex8-secret -o yaml
cd ../cka
ls
cd ../ckad/
ls 
cd ../cka
vim ex8-pod.yaml
kubectl get pv
kubectl get secret
vim ex8-pod.yaml
kubectl create -f ex8-pod.yaml 
vim ex8-pod.yaml
kubectl create -f ex8-pod.yaml 
kubectl get pods
kubectl exec -it secret-test-pod -- /bin/bash
kubectl get secret
kubectl get secret ex8-secret -o yaml
./counter.sh 10
kubectl get pods -n kube-system
sudo docker ps
sudo ps aux | grep etcd
sudo find / -name "etcdctl"
sudo etcdctl
sudo yum provides etcdctl
ping 8.8.8.8
sudo -i
source <(kubectl completion bash)
kubectl -h | less
kubectl cordon -h | less
kubectl drain -h | less
sudo yum install -y bash-completion
source <(kubectl completion bash)
kubectl get nodes
kubectl cordon worker2.example.com
kubectl get nodes
kubectl uncordon worker2.example.com
kubectl get nodes
kubectl drain worker2.example.com
exit
source <(kubectl completion bash)
echo "source <(kubectl completion bash)" >> > ~/.bashrc
echo "source <(kubectl completion bash)" >>  ~/.bashrc
exit
cd ckad/
./countdown 20
grep busybox2 *
vim busybox.yaml 
kubectl create -f busybox.yaml
exit
kubectl get pods
kubectl get svc
kubectl exec -it busybox2 -- nslookup kubernetes
cd cka
ls
vim pod-and-service-dns.yaml 
kubectl create -f pod-and-service-dns.yaml 
kubectl exec -it busybox22 -- nslookup default-subdomain
kubectl exec -it busybox22 -- nslookup busybox-1
kubectl get pods -n kube-system
kubectl get service -n kube-system
kubectl exec -it busybox22 -- cat /etc/resolv.conf
kubectl -n kube-system describe pods coredns-6955765f44-4mg22 
for p in $(kubectl get pods -n kube-system -l k8s-app=kube-dns -o name); do kubectl logs -n kube-system $p; done
kubectl get svc -n kube-system
kubectl get ep kube-dns -n kube-system
kubectl get pods --show-labels --all-namespaces
kubectl run busy22 --image busybox --restart Never; kubectl expose pod busy22 --name mysvc --port 80 --type ClusterIP; kubectl exec busy22 -- sh -c "mkdir -p /var/exam && nslookup busy22 > /var/exam/dnsnames.txt"
kubectl exec busy22 -- sh -c "mkdir -p /var/exam && nslookup busy22 > /var/exam/dnsnames.txt"
kubectl -it exec busy22 -- sh -c "mkdir -p /var/exam && nslookup busy22 > /var/exam/dnsnames.txt"
kubectl get svc
kubectl get pods
kubectl -it exec busybox22 -- sh -c "mkdir -p /var/exam && nslookup busy22 > /var/exam/dnsnames.txt"
kubectl -it exec busybox22 -- sh -c "mkdir -p /var/exam && nslookup busybox22 > /var/exam/dnsnames.txt"
kubectl -it exec busybox22 -- nslookup busybox22
kubectl get 
kubectl -it exec busybox22 -- nslookup myapp-pod
kubectl get sv
kubectl -it exec busybox22 -- nslookup mysvc
iptables -L
sudo iptables -L
ssh root@worker1
kubectl get pods -n kube-system
ssh root@worker3
kubectl get pods -o wide
./counter.sh 10
git clone https://github.com/kubernetes-incubator/metrics-server.git
kubectl create -f metrics-server/deploy/1.8+/
kubectl get all -n kube-system
kubectl top pods
kubectl top pods --all-namespaces
kubectl -n kube-system edit deployment metrics-server
kubectl -n kube-system logs metric-server
kubectl -n kube-system logs metrics-server-d98f494df-jhdht 
kubectl top pods --all-namespaces
ssh worker3
kubectl get pods --all-namespaces
kubectl top pods --all-namespaces
kubectl delete pod/busy22
kubectl top pods --all-namespaces
cd
vim .kube/config 
sudo vim /etc/kubernetes/admin.conf 
kubectl get pods -n kube-system
su -i
su -
kubectl get pods -n kube-system
kubectl -n kube-system delete pod metrics-server-d98f494df-jhdht 
kubectl top pods --all-namespaces
kubectl create deployment mydaemonset --image nginx -o yaml --dry-run > ds.yaml
vim ds.yaml 
kubectl api-resources | grep -i daemon
vim ds.yaml 
kubectl create -f ds.yaml 
cd cka
ls
vim daemonset-fluentd.yaml 
kubectl explain DaemonSet
kubectl explain DaemonSet | less
vim daemonset-fluentd.yaml 
kubectl create -f daemonset-fluentd.yaml 
kubectl get daemonset.apps/fluentd-elasticsearch
kubectl get daemonset
vim daemonset-fluentd.yaml 
kubectl -n kube-system get daemonset fluentd-elasticsearch -o yaml | less
history | grep edit
kubectl -n kube-system edit deployment metrics-server
history | grep delete
kubectl -n kube-system delete pod metrics-server-5d7898476-nhlq7 
kubectl top pods --all-namespaces
kubectl -n kube-system edit deployment metrics-server
kubectl top pods --all-namespaces
kubectl top pods
kubectl -n kube-system edit deployment metrics-server
kubectl get pods -n kube-system
kubectl -n kube-system exec -it metrics-server-5d7898476-465j7 -- /bin/sh
kubectl -n kube-system exec -it metrics-server-5d7898476-465j7 -- /bin/bash
kubectl -n kube-system exec -it metrics-server-5d7898476-465j7 -- bash
history
exit