Uncategorized Archives - Supereon Network Consultancy

BGP Table Data 2020

Measurements of the size of the routing table have been taken regularly since the start of 1988, although highly detailed snapshots of the routing system only date back to early

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

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:

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

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

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:

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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

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

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

Ferdi Bulbul

Kubernetes Components

This entry is part 2 of 5 in the series Kubernetes

Kubernetes is an open source platform for managing containerised workloads and services that facilitates declarative configuration and automation. The figure below shows the Kubernetes master and worker node components. MASTER