Minikube : Install2022/07/20

Install Minikube to configure Kubernetes Cluster on single node.

[1]	Install a Hypervisor that is supported by Minikube. On this example, Install KVM like here of [1] for it.
[2]	Install Snappy, refer to here of [1].
[3]	Install Minikube and other required tools.

# install kubectl

[root@dlp ~]#

snap install kubectl --classic

kubectl 1.20.5 from Canonical✓ installed

[root@dlp ~]#

wget https://storage.googleapis.com/minikube/releases/latest/minikube-linux-amd64 -O minikube

[root@dlp ~]#

wget https://storage.googleapis.com/minikube/releases/latest/docker-machine-driver-kvm2

[root@dlp ~]#

chmod 755 minikube docker-machine-driver-kvm2

[root@dlp ~]#

mv minikube docker-machine-driver-kvm2 /usr/local/bin/

[root@dlp ~]#

minikube version

minikube version: v1.26.0
commit: f4b412861bb746be73053c9f6d2895f12cf78565

[4]	Add users who use Minikube to [libvirt] group.

[root@dlp ~]#

usermod -aG libvirt cent

[5]	Start Minikube with a user who are in [libvirt] group.

[cent@dlp ~]$

minikube start --vm-driver=kvm2

* minikube v1.26.0 on Centos 9 (kvm/amd64)
* Using the kvm2 driver based on user configuration
* Downloading VM boot image ...
    > minikube-v1.26.0-amd64.iso....: 65 B / 65 B [----------] 100.00% ? p/s 0s
    > minikube-v1.26.0-amd64.iso: 268.86 MiB / 268.86 MiB  100.00% 18.30 MiB p/
* Starting control plane node minikube in cluster minikube
* Downloading Kubernetes v1.24.1 preload ...
    > preloaded-images-k8s-v18-v1...: 405.83 MiB / 405.83 MiB  100.00% 31.69 Mi
* Creating kvm2 VM (CPUs=2, Memory=3900MB, Disk=20000MB) .../
* Preparing Kubernetes v1.24.1 on Docker 20.10.16 ...
  - 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

# show status

[cent@dlp ~]$

minikube status

minikube
type: Control Plane
host: Running
kubelet: Running
apiserver: Running
kubeconfig: Configured

ubuntu@dlp:~$

minikube service list

|-------------|------------|--------------|-----|
|  NAMESPACE  |    NAME    | TARGET PORT  | URL |
|-------------|------------|--------------|-----|
| default     | kubernetes | No node port |
| kube-system | kube-dns   | No node port |
|-------------|------------|--------------|-----|

[cent@dlp ~]$

minikube docker-env

export DOCKER_TLS_VERIFY="1"
export DOCKER_HOST="tcp://192.168.39.57:2376"
export DOCKER_CERT_PATH="/home/cent/.minikube/certs"
export MINIKUBE_ACTIVE_DOCKERD="minikube"

# To point your shell to minikube's docker-daemon, run:
# eval $(minikube -p minikube docker-env)

[cent@dlp ~]$

kubectl cluster-info

Kubernetes control plane is running at https://192.168.39.57:8443
CoreDNS is running at https://192.168.39.57:8443/api/v1/namespaces/kube-system/services/kube-dns:dns/proxy

To further debug and diagnose cluster problems, use 'kubectl cluster-info dump'.

[cent@dlp ~]$

kubectl get nodes

NAME       STATUS   ROLES           AGE     VERSION
minikube   Ready    control-plane   8m49s   v1.24.1

# possible to access with SSH to the VM

[cent@dlp ~]$

minikube ssh

                         _             _
            _         _ ( )           ( )
  ___ ___  (_)  ___  (_)| |/')  _   _ | |_      __
/' _ ` _ `\| |/' _ `\| || , <  ( ) ( )| '_`\  /'__`\
| ( ) ( ) || || ( ) || || |\`\ | (_) || |_) )(  ___/
(_) (_) (_)(_)(_) (_)(_)(_) (_)`\___/'(_,__/'`\____)

hostname

minikube

docker ps

CONTAINER ID   IMAGE                  COMMAND                  CREATED         STATUS         PORTS     NAMES
f37e966fbe31   6e38f40d628d           "/storage-provisioner"   8 minutes ago   Up 8 minutes             k8s_storage-provisioner_storage-provisioner_kube-system_54391d95-4506-4f6d-91bb-a7d0b1088c00_1
55b93b6397b4   a4ca41631cc7           "/coredns -conf /etc…"   9 minutes ago   Up 9 minutes             k8s_coredns_coredns-6d4b75cb6d-8vrft_kube-system_30983de1-07df-45d2-bfc6-c32e1193e208_0
8a3b4442a0d2   beb86f5d8e6c           "/usr/local/bin/kube…"   9 minutes ago   Up 9 minutes             k8s_kube-proxy_kube-proxy-8bbqs_kube-system_04c003bb-916c-4c74-8158-6d4a87c3ea22_0
217c17fa2b91   k8s.gcr.io/pause:3.6   "/pause"                 9 minutes ago   Up 9 minutes             k8s_POD_coredns-6d4b75cb6d-8vrft_kube-system_30983de1-07df-45d2-bfc6-c32e1193e208_0
2bf6aeb538ab   k8s.gcr.io/pause:3.6   "/pause"                 9 minutes ago   Up 9 minutes             k8s_POD_kube-proxy-8bbqs_kube-system_04c003bb-916c-4c74-8158-6d4a87c3ea22_0
575844887b93   k8s.gcr.io/pause:3.6   "/pause"                 9 minutes ago   Up 9 minutes             k8s_POD_storage-provisioner_kube-system_54391d95-4506-4f6d-91bb-a7d0b1088c00_0
ccfcba6133c4   aebe758cef4c           "etcd --advertise-cl…"   9 minutes ago   Up 9 minutes             k8s_etcd_etcd-minikube_kube-system_b7ffe82a71ea2140a512d428ae7a9525_0
93ec486b2ce9   18688a72645c           "kube-scheduler --au…"   9 minutes ago   Up 9 minutes             k8s_kube-scheduler_kube-scheduler-minikube_kube-system_bab0508344d11c6fdb45b1f91c440ff5_0
39e516608272   e9f4b425f919           "kube-apiserver --ad…"   9 minutes ago   Up 9 minutes             k8s_kube-apiserver_kube-apiserver-minikube_kube-system_e879b64daded4ab7b904ff5bed6a6b51_0
d15f25af1328   b4ea7e648530           "kube-controller-man…"   9 minutes ago   Up 9 minutes             k8s_kube-controller-manager_kube-controller-manager-minikube_kube-system_852f03e6fe9ac86ddd174fb038c47d74_0
b46aa57b382a   k8s.gcr.io/pause:3.6   "/pause"                 9 minutes ago   Up 9 minutes             k8s_POD_etcd-minikube_kube-system_b7ffe82a71ea2140a512d428ae7a9525_0
40328d0d0ebb   k8s.gcr.io/pause:3.6   "/pause"                 9 minutes ago   Up 9 minutes             k8s_POD_kube-apiserver-minikube_kube-system_e879b64daded4ab7b904ff5bed6a6b51_0
07ddb0590ee6   k8s.gcr.io/pause:3.6   "/pause"                 9 minutes ago   Up 9 minutes             k8s_POD_kube-controller-manager-minikube_kube-system_852f03e6fe9ac86ddd174fb038c47d74_0
7a967bac761f   k8s.gcr.io/pause:3.6   "/pause"                 9 minutes ago   Up 9 minutes             k8s_POD_kube-scheduler-minikube_kube-system_bab0508344d11c6fdb45b1f91c440ff5_0

exit

# stop minikube

[cent@dlp ~]$

minikube stop

* Stopping node "minikube" ...
* 1 nodes stopped.

# start minikube

[cent@dlp ~]$

minikube start

* minikube v1.26.0 on Centos 9 (kvm/amd64)
* Using the kvm2 driver based on existing profile
* Starting control plane node minikube in cluster minikube
* Restarting existing kvm2 VM for "minikube" ...
* Preparing Kubernetes v1.24.1 on Docker 20.10.16 ...
* 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

# remove minikube VM

[cent@dlp ~]$

minikube delete

* Deleting "minikube" in kvm2 ...
* Removed all traces of the "minikube" cluster.

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