Installing Microk8s on CentOs7

Microk8s is a high availability, low-ops, production-ready kubernetes for developers, cloud, clusters, workstations, Edge, and IoT.

Minikube likewise lets you set up a single-node Kubernetes cluster locally,?but with one major difference: it's VM-based, which means it'll operate best in a virtual machine,?mostly on Mac and Windows, but also on Linux. MicroK8s, on the other hand, were created with?Linux in mind and do not require a virtual machine.

Instead, it's straightforward to install?as a snap package with only one command. Because MicroK8s does not require a virtual machine,?there are more resources available on the provided system to run applications, making it ideal for?edge deployments. It's even possible to use it to set up Kubernetes on a Raspberry Pi!

Follow below steps to install microk8s on CentOs7 :

[root@node1 ~]# hostname

node1.example.com

[root@node1 ~]# cat /etc/os-release

NAME="CentOS Linux"
VERSION="7 (Core)"
ID="centos"
ID_LIKE="rhel fedora"
VERSION_ID="7"
PRETTY_NAME="CentOS Linux 7 (Core)"
ANSI_COLOR="0;31"
CPE_NAME="cpe:/o:centos:centos:7"
HOME_URL="https://www.centos.org/"
BUG_REPORT_URL="https://bugs.centos.org/"

CENTOS_MANTISBT_PROJECT="CentOS-7"
CENTOS_MANTISBT_PROJECT_VERSION="7"
REDHAT_SUPPORT_PRODUCT="centos"
REDHAT_SUPPORT_PRODUCT_VERSION="7"
[root@node1 ~]#
        

Install epel yum repos

[root@node1 ~]# yum install epel-release        

Install snapd

[root@node1 ~]# yum install snapd        

Enable main snap communication socket

[root@node1 ~]# systemctl enable --now snapd.socket        

Create a symbolic link to enable classic snap support

[root@node1 ~]# ln -s /var/lib/snapd/snap /snap        

To verify snap's paths are changed correctly, log out and back in again, or restart?your machine.

[root@node1 ~]# snap install microk8s --classic

2021-09-29T12:46:21-04:00 INFO Waiting for automatic snapd restart..
microk8s (1.21/stable) v1.21.5 from Canonical? installed.
[root@node1 ~]#

        

Check microk8s status

[root@node1 ~]# microk8s status
microk8s is running
high-availability: no
? datastore master nodes: 127.0.0.1:19001
? datastore standby nodes: none
addons:
? enabled:
? ? ha-cluster? ? ? ? ? ?# Configure high availability on the current node
? disabled:
? ? ambassador? ? ? ? ? ?# Ambassador API Gateway and Ingress
? ? cilium? ? ? ? ? ? ? ?# SDN, fast with full network policy
? ? dashboard? ? ? ? ? ? # The Kubernetes dashboard
? ? dns? ? ? ? ? ? ? ? ? # CoreDNS
? ? fluentd? ? ? ? ? ? ? # Elasticsearch-Fluentd-Kibana logging and monitoring
? ? gpu? ? ? ? ? ? ? ? ? # Automatic enablement of Nvidia CUDA
? ? helm? ? ? ? ? ? ? ? ?# Helm 2 - the package manager for Kubernetes
? ? helm3? ? ? ? ? ? ? ? # Helm 3 - Kubernetes package manager
? ? host-access? ? ? ? ? # Allow Pods connecting to Host services smoothly
? ? ingress? ? ? ? ? ? ? # Ingress controller for external access
? ? istio? ? ? ? ? ? ? ? # Core Istio service mesh services
? ? jaeger? ? ? ? ? ? ? ?# Kubernetes Jaeger operator with its simple config
? ? keda? ? ? ? ? ? ? ? ?# Kubernetes-based Event Driven Autoscaling
? ? knative? ? ? ? ? ? ? # The Knative framework on Kubernetes.
? ? kubeflow? ? ? ? ? ? ?# Kubeflow for easy ML deployments
? ? linkerd? ? ? ? ? ? ? # Linkerd is a service mesh for Kubernetes and other frameworks
? ? metallb? ? ? ? ? ? ? # Loadbalancer for your Kubernetes cluster
? ? metrics-server? ? ? ?# K8s Metrics Server for API access to service metrics
? ? multus? ? ? ? ? ? ? ?# Multus CNI enables attaching multiple network interfaces to pods
? ? openebs? ? ? ? ? ? ? # OpenEBS is the open-source storage solution for Kubernetes
? ? openfaas? ? ? ? ? ? ?# openfaas serverless framework
? ? portainer? ? ? ? ? ? # Portainer UI for your Kubernetes cluster
? ? prometheus? ? ? ? ? ?# Prometheus operator for monitoring and logging
? ? rbac? ? ? ? ? ? ? ? ?# Role-Based Access Control for authorisation
? ? registry? ? ? ? ? ? ?# Private image registry exposed on localhost:32000
? ? storage? ? ? ? ? ? ? # Storage class; allocates storage from host directory
? ? traefik? ? ? ? ? ? ? # traefik Ingress controller for external access
[root@node1 ~]#

        

That's it. I hope you found this to be useful in some way. I'll be back with some more interesting new Kubernetes articles soon.