kubernetes Archives - Supereon Network Consultancy

May 6, 2020 Ferdi Bulbul

Kubernetes Node Deployment Problems

This entry is part 5 of 5 in the series Kubernetes

Error Messages The guest additions on this VM do not match the install version of VirtualBox. detected “cgroupfs” as the Docker cgroup driver. The recommended driver is “systemd” Unable to

May 6, 2020 Ferdi Bulbul

detected “cgroupfs” as the Docker cgroup driver. The recommended driver is “systemd”

This entry is part 5 of 6 in the series Kubernetes Deployment Errors

When you run kubeadm init to create a token for the cluster, cgroup driver error appears as below. [email protected]:~# kubeadm init –apiserver-advertise-address=$IP_ADDR –apiserver-cert-extra-sans=$IP_ADDR –node-name $HOST_NAME –pod-network-cidr=193.168.0.0/16W0416 21:25:59.142906 10872 configset.go:202] WARNING:

May 6, 2020 Ferdi Bulbul

Kubelet folder is missing on worker node

This entry is part 4 of 6 in the series Kubernetes Deployment Errors

When you run the kubeadm command to join to token on master node, you can receive an error as “kubelet folder is missing”. You must install “kubelet” manually on worker

May 6, 2020 Ferdi Bulbul

Unable to connect to the server: x509: certificate is valid for x.x.x.x” error

This entry is part 3 of 6 in the series Kubernetes Deployment Errors

If you have multiple interface IP addresses on your master node and configured kube api-server with one of them. You can receive the certification error, the reason is certification is

May 6, 2020 Ferdi Bulbul

Unable to connect to the server: x509: certificate signed by unknown authority (possibly because of “crypto/rsa: verification error” while trying to verify candidate authority certificate “kubernetes”)

This entry is part 2 of 6 in the series Kubernetes Deployment Errors

This is a permission error with the “admin” user. [email protected]:~$ kubectl get pods -n kube-systemUnable to connect to the server: x509: certificate signed by unknown authority (possibly because of “crypto/rsa:

May 6, 2020 Ferdi Bulbul

No supported authentication methods available [server sent:publickey]

This entry is part 6 of 6 in the series Kubernetes Deployment Errors

An SSH client is generally not distributed with Windows by default. Because of this, if you are on Windows, Vagrant will instead output SSH authentication info which you can use

May 6, 2020 Ferdi Bulbul

The guest additions on this VM do not match the install version of VirtualBox.

This entry is part 1 of 6 in the series Kubernetes Deployment Errors

When a node is started with the “vagrant up” command, error below appeared about the Guest Additions version mismatch. k8-master1: Checking for guest additions in VM…k8-master1: The guest additions on

April 26, 2020 Ferdi Bulbul

Kubernetes Worker Node

This entry is part 4 of 5 in the series Kubernetes

This includes the steps to implement a worker node using the ubuntu/xenial64 (16.04.6 LTS) image with Vagrant, and VirtualBox on Windows 10. Initialize the current directory to be a Vagrant

March 20, 2020 Ferdi Bulbul

Kubernetes Single Master Node

This entry is part 3 of 5 in the series Kubernetes

A single master cluster has one master node and can easily fail, while a multi-master cluster uses multiple master nodes, any of them has access to all worker nodes in

March 15, 2020 Ferdi Bulbul

Vagrant – Vagrantfile

Vagrant is a tool for building and managing virtual machine environments in a single workflow. Vagrant provides a simple and easy to use command-line client for managing these environments, and