docker info | grep "Storage Driver"
 
Storage Driver: overlay2

        docker stop $(docker ps -a -q)
        docker rm $(docker ps -a -q)
        docker rmi $(docker images -f "dangling-true" -q)
        docker volume rm $(docker volume ls -f dangling=true -q)

        docker images --format '{{.Size}}\t{{.Repository}}\t{{.Tag}}\t{{.ID}}' | sed 's/ //' | sort -h | column -t
 
 
1.24MB  busybox                        latest             bc01a3326866
18.6MB  gns3/openvswitch               latest             64b5202d0623
56.4MB  google/shaka-packager          latest             fbda4f81f776
117MB   redis                          latest             f9c173b0f012
202MB   postgres                       10                 1cad456b3a24
216MB   postgres                       14-alpine          664ff9e724c9
218MB   ffmpeg-multicast               latest             3a2431803ae8
218MB   jrottenberg/ffmpeg             latest             2100506dfbea
331MB   docker                         latest             ca9c20c1e8a7
429MB   zabbix/zabbix-server-pgsql     centos-6.2-latest  fa3ddcfd31c5
546MB   zabbix/zabbix-web-nginx-pgsql  centos-6.2-latest  93498dc51b1f
1.06GB  terratrax/scannerapi           latest             3b08ad5fff14
1.3GB   ansible/awx                    14.1.0             8a29b4e35f5f
 

alias ubund='docker run --name ubuntu -it 1ce8erg0/ubuntu:16.04 bash'

# Use an official Python runtime as a parent image
FROM python:3.8-slim
 
# Set the working directory
WORKDIR /app
 
# Copy the current directory contents into the container
COPY . /app
 
# Install any needed packages
RUN pip install -r requirements.txt
 
# Run the app when the container starts
CMD ["python", "app.py"]
 

 
 
sudo apt update
sudo apt install -y apt-transport-https ca-certificates curl net-tools 
 
sudo apt install docker.io
sudo systemctl start docker
sudo systemctl enable docker
 
 
echo "deb [signed-by=/etc/apt/keyrings/kubernetes-apt-keyring.gpg] https://pkgs.k8s.io/core:/stable:/v1.28/deb/ /" | sudo tee /etc/apt/sources.list.d/kubernetes.list
 
curl -fsSL https://pkgs.k8s.io/core:/stable:/v1.28/deb/Release.key | sudo gpg --dearmor -o /etc/apt/keyrings/kubernetes-apt-keyring.gpg
 
sudo apt-get update
sudo hostnamectl set-hostname kubernetes-master
 

sudo swapoff -a
sudo apt install -y kubelet kubeadm kubectl
 
sudo apt-mark hold kubelet kubeadm kubectl
 
mkdir -p $HOME/.kube
sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
sudo chown $(id -u):$(id -g) $HOME/.kube/config
 
 
kubelet --version
kubectl version --client
kubeadm version
 
sudo kubeadm init --apiserver-advertise-address=192.168.56.10 --pod-network-cidr=192.168.0.0/16
 
  export KUBECONFIG=/etc/kubernetes/admin.conf
 
kubectl get pods -n kube-system
sudo systemctl restart kubelet
sudo journalctl -u kubelet -f
 
kubectl apply -f https://docs.projectcalico.org/manifests/calico.yaml
 
 

I0914 08:47:44.807948    1764 version.go:256] remote version is much newer: v1.31.0; falling back to: stable-1.28
[init] Using Kubernetes version: v1.28.13
[preflight] Running pre-flight checks
        [WARNING FileExisting-socat]: socat not found in system path
[preflight] Pulling images required for setting up a Kubernetes cluster
[preflight] This might take a minute or two, depending on the speed of your internet connection
[preflight] You can also perform this action in beforehand using 'kubeadm config images pull'
 

kubeadm token create --print-join-command
kubeadm join 10.0.2.15:6443 --token o1i282.fofbqewf8jys3xkk --discovery-token-ca-cert-hash sha256:907deb30877b3566dee7c39a4da03b47b6e6a08c37aeb959a2a231090ca433b3
 

Your Kubernetes control-plane has initialized successfully!
 
To start using your cluster, you need to run the following as a regular user:
 
  mkdir -p $HOME/.kube
  sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
  sudo chown $(id -u):$(id -g) $HOME/.kube/config
 
Alternatively, if you are the root user, you can run:
 
  export KUBECONFIG=/etc/kubernetes/admin.conf
 
You should now deploy a pod network to the cluster.
Run "kubectl apply -f [podnetwork].yaml" with one of the options listed at:
  https://kubernetes.io/docs/concepts/cluster-administration/addons/
 
Then you can join any number of worker nodes by running the following on each as root:
 
kubeadm join 192.168.56.10:6443 --token e48ljd.kf2sij6e16dapbv9 \
        --discovery-token-ca-cert-hash sha256:2c07edaed836a06c8f75b234f82aa7f5d41eb838956b7d50d33eab551a821603

kubectl cluster-info
kubeadm token list
kubectl get nodes
 
kubectl get cm -n kube-system kubeadm-config -o yaml > kubeadm-config.yaml

kubeadm reset 
root@focal:~# rm -rf ~/.kube/ /etc/kubernetes/ /etc/cni/

kubernetes-master:~$ kubectl apply -f https://raw.githubusercontent.com/coreos/flannel/master/Documentation/kube-flannel.yml
kubernetes-master:~$ kubectl apply -f https://raw.githubusercontent.com/coreos/flannel/master/Documentation/k8s-manifests/kube-flannel-rbac.yml
 
kubernetes-master:~$ kubectl get pods --all-namespaces
 
kubernetes-worker:~$ sudo kubeadm join 192.168.1.220:6443 --token 1exb8s.2t4k3b5syfc3jfmo --discovery-token-ca-cert-hash sha256:72ad481cee4918cf2314738419356c9a402fb609263adad48c13797d0cba2341
 
kubernetes-master:~$ kubectl apply -f https://k8s.io/examples/controllers/nginx-deployment.yaml
kubernetes-master:~$ kubectl run --image=nginx nginx-server --port=80 --env="DOMAIN=cluster"
kubernetes-master:~$ kubectl expose deployment nginx-deployment --port=80 --name=nginx-http
 
kubernetes-master:~$ kubectl get svc