dockerとkubectl とminikube をWSL2で用意

sudo apt-get remove docker docker-engine docker.io containerd runc

$ sudo apt-get install apt-transport-https ca-certificates curl gnupg lsb-release
$ curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo gpg --dearmor -o /usr/share/keyrings/docker-archive-keyring.gpg

$ sudo docker run hello-world
Unable to find image 'hello-world:latest' locally
latest: Pulling from library/hello-world
b8dfde127a29: Pull complete
Digest: sha256:f2266cbfc127c960fd30e76b7c792dc23b588c0db76233517e1891a4e357d519
Status: Downloaded newer image for hello-world:latest

Hello from Docker!
This message shows that your installation appears to be working correctly.

To generate this message, Docker took the following steps:
 1. The Docker client contacted the Docker daemon.
 2. The Docker daemon pulled the "hello-world" image from the Docker Hub.
    (amd64)
 3. The Docker daemon created a new container from that image which runs the
    executable that produces the output you are currently reading.
 4. The Docker daemon streamed that output to the Docker client, which sent it
    to your terminal.

To try something more ambitious, you can run an Ubuntu container with:
 $ docker run -it ubuntu bash

Share images, automate workflows, and more with a free Docker ID:
 https://hub.docker.com/

For more examples and ideas, visit:
 https://docs.docker.com/get-started/

$ sudo docker run hello-world
docker: Cannot connect to the Docker daemon at unix:///var/run/docker.sock. Is the docker daemon running?.
See 'docker run --help'.
$ sudo service docker stop
 * Docker already stopped - file /var/run/docker-ssd.pid not found.
$ sudo service docker start
 * Starting Docker: docker

$ docker login
Login with your Docker ID to push and pull images from Docker Hub. If you don't have a Docker ID, head over to https://hub.docker.com to create one.
Username: xxxyyyzzz
Password:
WARNING! Your password will be stored unencrypted in /home/xxxyyyzzz/.docker/config.json.
Configure a credential helper to remove this warning. See
https://docs.docker.com/engine/reference/commandline/login/#credentials-store

Login Succeeded

$ cat ~/.docker/config.json
{
        "auths": {
                "https://index.docker.io/v1/": {
                        "auth": "eHRrZDc3OnRha2VkYTIwSUd="
                }
        }
}

$ docker images
REPOSITORY                    TAG       IMAGE ID       CREATED       SIZE
hello-world                   latest    d1165f221234   8 weeks ago   13.3kB
$ docker tag d1165f221234 user77/helloworld:v0
$ docker images
REPOSITORY                    TAG       IMAGE ID       CREATED       SIZE
hello-world                   latest    d1165f221234   8 weeks ago   13.3kB
user77/helloworld             v0        d1165f221234   8 weeks ago   13.3kB

$ docker push user77/helloworld:v0
The push refers to repository [docker.io/user77/helloworld]
f22b99068db9: Mounted from library/hello-world
v0: digest: sha256:1b26826f602946860c279fce658f31050cff2c596583af237d971f4629b57792 size: 525

$ curl -LO "https://storage.googleapis.com/kubernetes-release/release/$(curl -s https://storage.googleapis.com/kubernetes-release/release/stable.txt)/bin/linux/amd64/kubectl"
$ chmod +x kubectl
$ sudo mv ./kubectl /usr/local/bin/
$ kubectl version --client
Client Version: version.Info{Major:"1", Minor:"21", GitVersion:"v1.21.0", GitCommit:"cb303e613a121a29364f75cc67d3d580833a7479", GitTreeState:"clean", BuildDate:"2021-04-08T16:31:21Z", GoVersion:"go1.16.1", Compiler:"gc", Platform:"linux/amd64"}

$ kubectl get pods
The connection to the server localhost:8080 was refused - did you specify the right host or port?
$  kubectl config view
apiVersion: v1
clusters: null
contexts: null
current-context: ""
kind: Config
preferences: {}
users: null

$ curl -LO https://storage.googleapis.com/minikube/releases/latest/minikube-linux-amd64
$ sudo install minikube-linux-amd64 /usr/local/bin/minikube

$ minikube start --driver=docker
😄  minikube v1.19.0 on Ubuntu 20.04
✨  Using the docker driver based on user configuration

💣  Exiting due to PROVIDER_DOCKER_NEWGRP: "docker version --format -" exit status 1: Got permission denied while trying to connect to the Docker daemon socket at unix:///var/run/docker.sock: Get http://%2Fvar%2Frun%2Fdocker.sock/v1.24/version: dial unix /var/run/docker.sock: connect: permission denied
💡  Suggestion: Add your user to the 'docker' group: 'sudo usermod -aG docker $USER && newgrp docker'
📘  Documentation: https://docs.docker.com/engine/install/linux-postinstall/

$ sudo usermod -aG docker $USER && newgrp docker

$ minikube start --driver=docker
😄  minikube v1.19.0 on Ubuntu 20.04
✨  Using the docker driver based on user configuration
👍  Starting control plane node minikube in cluster minikube
🚜  Pulling base image ...
💾  Downloading Kubernetes v1.20.2 preload ...
    > gcr.io/k8s-minikube/kicbase...: 357.67 MiB / 357.67 MiB  100.00% 1.99 MiB
    > preloaded-images-k8s-v10-v1...: 491.71 MiB / 491.71 MiB  100.00% 2.55 MiB
🔥  Creating docker container (CPUs=2, Memory=3100MB) ...
❗  This container is having trouble accessing https://k8s.gcr.io
💡  To pull new external images, you may need to configure a proxy: https://minikube.sigs.k8s.io/docs/reference/networking/proxy/
🐳  Preparing Kubernetes v1.20.2 on Docker 20.10.5 ...
    ▪ Generating certificates and keys ...
    ▪ Booting up control plane ...
    ▪ Configuring RBAC rules ...
🔎  Verifying Kubernetes components...
    ▪ Using image gcr.io/k8s-minikube/storage-provisioner:v5
🌟  Enabled addons: storage-provisioner, default-storageclass
🏄  Done! kubectl is now configured to use "minikube" cluster and "default" namespace by default

$ kubectl cluster-info
Kubernetes control plane is running at https://127.0.0.1:49154
KubeDNS is running at https://127.0.0.1:49154/api/v1/namespaces/kube-system/services/kube-dns:dns/proxy

To further debug and diagnose cluster problems, use 'kubectl cluster-info dump'.
$ kubectl get po -A
NAMESPACE     NAME                               READY   STATUS    RESTARTS   AGE
kube-system   coredns-74ff55c5b-f2sb9            1/1     Running   0          6m29s
kube-system   etcd-minikube                      1/1     Running   0          6m36s
kube-system   kube-apiserver-minikube            1/1     Running   0          6m36s
kube-system   kube-controller-manager-minikube   1/1     Running   0          6m36s
kube-system   kube-proxy-9zvzc                   1/1     Running   0          6m29s
kube-system   kube-scheduler-minikube            1/1     Running   0          6m36s
kube-system   storage-provisioner                1/1     Running   0          6m43s

kubectl create deployment hello-minikube --image=k8s.gcr.io/echoserver:1.4
kubectl expose deployment hello-minikube --type=NodePort --port=8080

minikube tunnel

$ kubectl get svc
NAME              TYPE           CLUSTER-IP      EXTERNAL-IP   PORT(S)          AGE
hello-minikube1   LoadBalancer   10.104.80.113   127.0.0.1     8080:31984/TCP   32m
kubernetes        ClusterIP      10.96.0.1       <none>        443/TCP          77m

$ minikube addons list

$ minikube delete
🔥  Deleting "minikube" in docker ...
🔥  Deleting container "minikube" ...
🔥  Removing /home/xtkd/.minikube/machines/minikube ...
💀  Removed all traces of the "minikube" cluster.