windows/linux SHA256

REM: windows: CertUtil -hashfile testfile.zip SHA256

#linux sha256sum testfile.zip

minikube basic

Reference: https://minikube.sigs.k8s.io/docs/handbook/controls/

 Start a cluster by running:

minikube start

Access the Kubernetes dashboard running within the minikube cluster:

minikube dashboard

Once started, you can interact with your cluster using kubectl, just like any other Kubernetes cluster. For instance, starting a server:

# create deployment
kubectl create deployment regex-minikube --image=registry.dev.mbpsmartec.co.jp/regexgo:v4
# expose a service as a NodePort
kubectl expose deployment regex-minikube --type=NodePort --port=8080

minikube makes it easy to open this exposed endpoint in your browser:

minikube service regex-minikube

Upgrade your cluster:

minikube start --kubernetes-version=latest

Start a second local cluster
(note: This will not work if minikube is using the bare-metal/none driver):

minikube start -p cluster2

Deploying apps
kubectl create deployment hello-minikube1 --image=kicbase/echo-server:1.0
kubectl expose deployment hello-minikube1 --type=LoadBalancer --port=8080
kubectl expose deployment hello-minikube1 --type=NodePort --port=8080

$ kubectl get svc
NAME              TYPE        CLUSTER-IP      EXTERNAL-IP   PORT(S)          AGE
hello-minikube1   NodePort    10.100.238.34   <none>        8080:31389/TCP   3s

$ minikube service hello-minikube1 --url

Addons (Istio or Ingress) built-in list of applications and services
minikube addons list 
minikube addons enable <name>
#enable an addon at start-up, where –addons option can be specified multiple times:
minikube start --addons <name1> --addons <name2>

Stop your local cluster:

minikube stop

Delete your local cluster:

minikube delete

#Delete all local clusters and profiles
minikube delete --all

kind(kube in docker) instroduction

Linux:

______________________________________

curl -LO "https://dl.k8s.io/release/$(curl -L -s https://dl.k8s.io/release/stable.txt)/bin/linux/amd64/kubectl"

sudo install -o root -g root -m 0755 kubectl /usr/local/bin/kubectl

#check install 

kubectl version --client

curl -Lo ./kind https://kind.sigs.k8s.io/dl/v0.10.0/kind-linux-amd64

chmod +x ./kind

sudo mv kind /usr/local/bin/

#check install 

kind version

__________________________________________

kind create cluster --name=kind2 --config=kind-config.yaml

-------------------------kind-config.yaml: 

# this config file contains all config fields with comments

# NOTE: this is not a particularly useful config file

kind: Cluster

apiVersion: kind.x-k8s.io/v1alpha4

# patch the generated kubeadm config with some extra settings

kubeadmConfigPatches:

- |

  apiVersion: kubelet.config.k8s.io/v1beta1

  kind: KubeletConfiguration

  evictionHard:

    nodefs.available: "0%"

# patch it further using a JSON 6902 patch

kubeadmConfigPatchesJSON6902:

- group: kubeadm.k8s.io

  version: v1beta2

  kind: ClusterConfiguration

  patch: |

    - op: add

      path: /apiServer/certSANs/-

      value: my-hostname

# 1 control plane node and 3 workers

nodes:

# the control plane node config. default one node hosting a control plane

- role: control-plane

  kubeadmConfigPatches:

  - |

    kind: InitConfiguration

    nodeRegistration:

      kubeletExtraArgs:

        node-labels: "my-label=true"

  extraMounts:

  - hostPath: /home/test-user/data/files/

    containerPath: /files

  extraPortMappings:

  - containerPort: 80

    hostPort: 8000

    listenAddress: "0.0.0.0" # Optional, defaults to "0.0.0.0"

    #protocol: udp # Optional, defaults to tcp

# the three workers

- role: worker

- role: worker

- role: worker