#StandingWithUkraine (English)

Usually I write about technology in this blog. Today, I’m breaking the rule.

I can’t be silent anymore. I am a Ukrainian who has lived in Germany for 26 years. I am a citizen of Germany and share German and European values.

The day before yesterday a crazy dictator attacked my country. Because Ukrainians chose the European way and wanted to build a democratic society. Now civilians are dying, beautiful cities and villages are being destroyed.

My dear Germans and European citizens! Help Ukraine. Military help is very important. This country is now fighting for itself, for the whole Europe, for democratic values. Because if Ukraine goes down, next targets are Narva in Estonia, Lithuania and Poland. Putin wants to win the cold war 2.0 and go down in the history books as the greatest politician of all time.

We, Europeans, must learn to stand against the wind and not always take a half step back in the hope that this will satisfy Putin. Let us be strong! We need to get out of the comfort zone at last! We need strong politics and strong society. Help Ukraine, please make the first step in the right direction!

#StandingWithUkraine (German)

Normalerweise schreibe ich in diesem Blog über Technik. Heute breche ich die Regel.

Ich kann nicht mehr schweigen.

Ich bin ein Ukrainer, der seit 26 Jahren in Deutschland lebt. Ich bin Bürger von Deutschland und teile deutsche und europäische Werte.

Vorgestern ein verrückter Diktator hat mein Land angegriffen. Denn Ukrainer haben den europäischen Weg gewählt und eine demokratische Gesellschaft aufbauen wollen. Jetzt sterben Zivilisten, schöne Städte und Dörfer werden zerstört.

Meine Liebe Deutsche und Europäische Mitbürgern! Hilft der Ukraine. Militärische Hilfe ist sehr wichtig. Dieses Land kämpft jetzt für sich, für die ganze Europa, für die demokratischen Werte. Denn wenn die Ukraine niedergeht, nächste Ziele sind Narva in Estland, Litauen und Polen. Putin will den kalten Krieg 2.0 gewinnen und als größten Politiker aller Zeiten in die Geschichtsbücher eingehen. Wir, Europäer, müssen lernen, uns gegen den Wind zu stellen und nicht immer ein halber Schritt zurückzugehen, in der Hoffnung, dass wir damit Putin befriedigen können. Lasst uns stark sein! Wir müssen aus der Komfortzone endlich raus! Wir brauchen starkes Politikum und starke Gesellschaft. Hilft der Ukraine, macht bitte den ersten Schritt in die richtige Richtung!

Getting started with Kubernetes in the Microsoft Azure Cloud

In order to test the Azure Kubernetes Service (AKS), I just created the Azure free account. Now I am ready to start the installation

Create the Azure Kubernetes Service via the Cloud Console

Klick on „Create Kubernetes Service“:

Getting started with Kubernetes in the Oracle Cloud

In this blog post I am going to explain how to create and configure the Kubernetes Cluster in the Oracle Cloud Infrastructure. Oracle offers its own service called Oracle Kubetnetes Engine (OKE).

As a prerequisite, a user must already exist in the cloud who has permission to create and manage the Kubernetes cluster in a compartment. The following policies are necessary to create, update and delete cluster components:

Allow group <group-name> to manage instance-family in <location>
Allow group <group-name> to use subnets in <location>
Allow group <group-name> to read virtual-network-family in <location>
Allow group <group-name> to use vnics in <location>
Allow group <group-name> to inspect compartments in <location>

For more information about users, groups and policies refer to my post Oracle OCI : Administer User, Groups, Compartments in the Oracle Cloud Infrastructure

Considerations before installation

Create and use the Oracle File storage service in the Oracle Cloud Infrastructure (OCI)

In this blog post I am going to explain how to create the file storage service in the Oracle Cloud (OCI) and mount it via NFS to the Linux VM.

A virtual cloud network and a linux vm should already exist.

Firstly, we are going to create the four security rules to allow traffic via the NFS protocol.

Oracle Cloud: Configuring the Load Balancer and attaching it to the instance pool

In the previous blog post I explained the creation and configuration of the instance pool and autoscaling configuration.

If you run farm from the web server and the application server, you should route the client accesses to these servers via a load balancer. The load balancer receives the client requests and distributes them within the server pool.

In this blog post I am going to describe how to create and configure a load balancer and associate it with the instance pool. For the creation of the instance pool and autoscaling configuration please refer to my post How to configure and check the autoscaling of compute nodes in the Oracle Cloud Infrastructure (OCI)

Now we will provision the load balancer in the OCI.

How to configure and check the autoscaling of compute nodes in the Oracle Cloud Infrastructure (OCI)

In this blog post I am going to explain the provisioning of the compute pool node with autoscaling configuration. I have already created the VM instance-bne and installed the Nginx web server in the VM.

During the provisioning of the Linux VM I added the Cloud-Init script as the advanced option that executes the installation and configuration of the Nginx webserver in my vm:

#cloud-config

package_update: false
packages:
  - nginx
runcmd:
 - systemctl enable nginx
 - systemctl start nginx
 - firewall-offline-cmd --add-service=http
 - systemctl restart firewalld

Go DevOps Veranstaltung in Berlin

Auf der Go DevOps 2019 am 2. und 3. September in Berlin dreht sich alles um Infrastruktur, Security und kulturelle Aspekte von DevOps. In drei laufenden Streams wird viel Know-how geboten, um allerlei Herausforderungen im IT-Umfeld bewältigen zu können. Beugen Sie verzögerten Projekten oder verpassten Deadlines vor und tauschen Sie sich mit Gleichgesinnten aus. Melden Sie sich jetzt an: GoDevOps

Oracle OCI : Administer User, Groups, Compartments in the Oracle Cloud Infrastructure

In this blogpost about the Oracle Cloud Infrastructure I will describe how to administer user, groups etc. Refer to the first blogpost Getting started with the Oracle Cloud Infrastructure for explain the first steps with the OCI.

A user in the OCI can access, create and administer cloud services. The permissions for users can be consolidated in groups as policies. Policies define the allowed actions for group members and in which department.

A Compartment is logical group of resources that represents an organizational unit. Resources will be created in a compartment. You cannot move the cloud resources from one compartment into another…

Install, configure and test Oracle Cloud (OCI) CLI on the Oracle Linux 7.4

Every cloud administrator wants to administer and monitor their cloud resources from a central location. The Cloud (OCI) Command-Line interface OCI CLI enables this. In this blog post I will describe the installation and configuration of the Cloud CLI on an Linux Server with OS Oracle Enterprise Linux.

Installation CLI

To install and use the Cloud CLI you must have the following data:

OCI User: Users for connecting to cloud services
A SSH Keypair used for signing API requests, with the public key uploaded to Oracle OCI
Python version 2.7.5 or 3.5 or later