Minikube in container

环境

Ubuntu18.04 VMware虚拟机

步骤

安装curl

root@ubuntu:~# apt install curl

安装docker

root@ubuntu:~# curl -fsSL https://get.docker.com | bash -s docker --mirror Aliyun

下载minikube

root@ubuntu:~# curl -Lo minikube https://kubernetes.oss-cn-hangzhou.aliyuncs.com/minikube/releases/v1.16.0/minikube-linux-amd64 && chmod +x minikube && sudo mv minikube /usr/local/bin/

下载kubectl

root@ubuntu:~# cat <<EOF >/etc/apt/sources.list.d/kubernetes.list
> deb https://mirrors.aliyun.com/kubernetes/apt/ kubernetes-xenial main
> EOF
root@ubuntu:~# apt update
root@ubuntu:~# apt install kubectl

添加新user

root@ubuntu:~# adduser k8smini

给新user添加权限

root@ubuntu:~# chmod u+w /etc/sudoers
root@ubuntu:~# vi /etc/sudoers  

在root    ALL=(ALL:ALL) ALL下面添加新user    ALL=(ALL:ALL) ALL
# User privilege specification
root    ALL=(ALL:ALL) ALL
k8smini ALL=(ALL:ALL) ALL

将新user添加到docker group以具有使用docker权限

root@ubuntu:~# su - k8smini
k8smini@ubuntu:~$ sudo usermod -aG docker $USER && newgrp docker

以docker driver启动minikube

k8smini@ubuntu:~$ minikube start --driver=docker
* minikube v1.16.0 on Ubuntu 18.04
* Using the docker driver based on user configuration

X The requested memory allocation of 1970MiB does not leave room for system overhead (total system memory: 1970MiB). You may face stability issues.
* Suggestion: Start minikube with less memory allocated: 'minikube start --memory=1970mb'

* Starting control plane node minikube in cluster minikube
* Pulling base image ...
* Creating docker container (CPUs=2, Memory=1970MB) ...
    > kubeadm.sha256: 64 B / 64 B [--------------------------] 100.00% ? p/s 0s
    > kubectl.sha256: 64 B / 64 B [--------------------------] 100.00% ? p/s 0s
    > kubelet.sha256: 64 B / 64 B [--------------------------] 100.00% ? p/s 0s
    > kubeadm: 37.40 MiB / 37.40 MiB [---------------] 100.00% 13.76 MiB p/s 3s
    > kubectl: 38.37 MiB / 38.37 MiB [---------------] 100.00% 12.48 MiB p/s 3s
    > kubelet: 108.69 MiB / 108.69 MiB [-------------] 100.00% 14.51 MiB p/s 8s

  - Generating certificates and keys ...
  - Booting up control plane ...
  - Configuring RBAC rules ...
* Verifying Kubernetes components...
* Enabled addons: default-storageclass, storage-provisioner
* Done! kubectl is now configured to use "minikube" cluster and "default" namespace by default

查看

查看宿主机容器情况

宿主机的docker上运行着minikube的容器

k8smini@ubuntu:~$ docker ps
CONTAINER ID   IMAGE                                                                           COMMAND                  CREATED         STATUS         PORTS                                                                                                      NAMES
d52d295d9936   registry.cn-hangzhou.aliyuncs.com/google_containers/kicbase:v0.0.15-snapshot4   "/usr/local/bin/entr…"   6 minutes ago   Up 5 minutes   127.0.0.1:49156->22/tcp, 127.0.0.1:49155->2376/tcp, 127.0.0.1:49154->5000/tcp, 127.0.0.1:49153->8443/tcp   minikube

查看minikube容器

可以看到minikube是一个linux的container，后续查看到是ubuntu20.04的container，并且在minikube容器里面，也有自己的docker 以及kubernetes 相关容器
所以宿主机与minikube容器的关系就是kubernetes集群是部署在minikube容器之中，而这个集群的管理者是宿主机，kubectl工具也在宿主机上

k8smini@ubuntu:~$ minikube ssh
docker@minikube:~$ uname -a
Linux minikube 4.15.0-76-generic #86-Ubuntu SMP Fri Jan 17 17:24:28 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux
docker@minikube:~$ docker images
REPOSITORY                                                                    TAG        IMAGE ID       CREATED         SIZE
kubernetesui/dashboard                                                        v2.1.0     9a07b5b4bfac   2 weeks ago     226MB
registry.cn-hangzhou.aliyuncs.com/google_containers/dashboard                 v2.1.0     9a07b5b4bfac   2 weeks ago     226MB
registry.cn-hangzhou.aliyuncs.com/google_containers/kube-proxy                v1.20.0    10cc881966cf   2 weeks ago     118MB
registry.cn-hangzhou.aliyuncs.com/google_containers/kube-controller-manager   v1.20.0    b9fa1895dcaa   2 weeks ago     116MB
registry.cn-hangzhou.aliyuncs.com/google_containers/kube-apiserver            v1.20.0    ca9843d3b545   2 weeks ago     122MB
registry.cn-hangzhou.aliyuncs.com/google_containers/kube-scheduler            v1.20.0    3138b6e3d471   2 weeks ago     46.4MB
registry.cn-hangzhou.aliyuncs.com/google_containers/storage-provisioner       v4         85069258b98a   3 weeks ago     29.7MB
registry.cn-hangzhou.aliyuncs.com/google_containers/etcd                      3.4.13-0   0369cf4303ff   4 months ago    253MB
registry.cn-hangzhou.aliyuncs.com/google_containers/coredns                   1.7.0      bfe3a36ebd25   6 months ago    45.2MB
kubernetesui/metrics-scraper                                                  v1.0.4     86262685d9ab   9 months ago    36.9MB
registry.cn-hangzhou.aliyuncs.com/google_containers/metrics-scraper           v1.0.4     86262685d9ab   9 months ago    36.9MB
registry.cn-hangzhou.aliyuncs.com/google_containers/pause                     3.2        80d28bedfe5d   10 months ago   683kB
docker@minikube:~$ kubectl get all -n kube-system
-bash: kubectl: command not found
docker@minikube:~$ docker images                 
REPOSITORY                                                                    TAG        IMAGE ID       CREATED         SIZE
kubernetesui/dashboard                                                        v2.1.0     9a07b5b4bfac   2 weeks ago     226MB
registry.cn-hangzhou.aliyuncs.com/google_containers/dashboard                 v2.1.0     9a07b5b4bfac   2 weeks ago     226MB
registry.cn-hangzhou.aliyuncs.com/google_containers/kube-proxy                v1.20.0    10cc881966cf   2 weeks ago     118MB
registry.cn-hangzhou.aliyuncs.com/google_containers/kube-apiserver            v1.20.0    ca9843d3b545   2 weeks ago     122MB
registry.cn-hangzhou.aliyuncs.com/google_containers/kube-scheduler            v1.20.0    3138b6e3d471   2 weeks ago     46.4MB
registry.cn-hangzhou.aliyuncs.com/google_containers/kube-controller-manager   v1.20.0    b9fa1895dcaa   2 weeks ago     116MB
registry.cn-hangzhou.aliyuncs.com/google_containers/storage-provisioner       v4         85069258b98a   3 weeks ago     29.7MB
registry.cn-hangzhou.aliyuncs.com/google_containers/etcd                      3.4.13-0   0369cf4303ff   4 months ago    253MB
registry.cn-hangzhou.aliyuncs.com/google_containers/coredns                   1.7.0      bfe3a36ebd25   6 months ago    45.2MB
kubernetesui/metrics-scraper                                                  v1.0.4     86262685d9ab   9 months ago    36.9MB
registry.cn-hangzhou.aliyuncs.com/google_containers/metrics-scraper           v1.0.4     86262685d9ab   9 months ago    36.9MB
registry.cn-hangzhou.aliyuncs.com/google_containers/pause                     3.2        80d28bedfe5d   10 months ago   683kB
docker@minikube:~$ e