Author: <span>kenio.carvalho</span>

Published 07/11/2021

Create VM templates on KVM

Continuing with the preparation of my lab I have installed a vm with RHEL 8.4 updated and from there I will create a template.

To create a template and use it later in the KVM the steps are as follows:

obs: My host is an Ubuntu 20.04

Install the tools to work with guests:

sudo apt install libguestfs-tools

List the vms:

virsh list --all

Prepare the rhel8-2 virtual machine to be a template

sudo virt-sysprep -d rhel8-2

Rename the vm to be a template

sudo virsh domrename rhel8-2 rhel8-Template

Open the VM Manager (virt-manager), and then select the rhel-Template. Right-click on it and select the Clone option, which will open the Clone Virtual Machine window.

Linux openshift

Published 05/11/2021

RedHat OpenShift Certification – Home Lab Setup

I am studying to take some RedHat certification exams including the OpenShift Enterprise Administration (DO280) exam.  I could set up Linux cloud servers such as IBM Cloud or even on AWS but I have an old laptop and decided to setup

a cluster with 3 Linux machines on it. I will start building a small k8s cluster. The first step was to install Ubuntu 20.04 as host.

My old laptop is a Toshiba Satellite P875 – S3210 32GB RAM 512GB SSD 750 GB HD SATA

Install and Enable SSH server on Ubuntu 20.04

  1. Update ubuntu : sudo apt-get update
  2. Install OpenSSH: sudo apt-get install openssh-server
  3. Verify the status: sudo systemctl status sshd
  4. Enable ssh connections on the host: sudo ufw allow ssh
  5.  Check if openssh is enabled:  sudo systemctl list-unit-files | grep enabled | grep ssh6
  6. If you have no results on step 5: sudo systemctl enable ssh

Now I can connect to my ubuntu laptop using ssh.

The second step was to install Timeshift and perform a backup of the system.

  1. Add the repository: add-apt-repository -y ppa:teejee2008/ppa2
  2. Install TimeShift: apt install timeshift

Then I made the first backup and started the KVM installation

Install KVM on Ubuntu 20.04

Install KVM:

  1. sudo apt install qemu qemu-kvm libvirt-clients libvirt-daemon-system virtinst bridge-utilsb
  2. sudo systemctl enable libvirtd
  3. sudo systemctl start libvirtd

Configure VNC:  VNC support should be available by default, and I do this configuration:

Edit /etc/libvirt/qemu.conf and add: vnc_listen = “0.0.0.0”
This will enable VNC on all networks. This is not a problem for me because it’s a local machine. Don’t do this if you are using a machine exposed to internet.b.

Edit /etc/libvirt/libvirtd.conf and add: listen_tcp = 1

Reboot the machine.

Enable VNC connections: sudo ufw allow 5900:5903 (VNC uses TCP port 5900+n and I will setup 3 machines)

Setup a bridge network

 The default network virbr0, created by KVM does not allow virtual machines to communicate with external hosts (inbound and outbound).

Using the nmcli tool I setup a bridge network. I try to use my wireless connection but it’s not work, some documents show that this only work with ethernet interfaces. My host ethernet connection is enp1s0

nmcli con add ifname br0 type bridge con-name br0

nmcli con add type bridge-slave ifname enp1s0 master br0

nmcli con down “Wired connection 1”

nmcli con up br0

Declaring KVM Bridged Network Create a xml file anmed bridge.xml with the lines:

<network>  <name>br0</name>  <forward mode="bridge"/>  <bridge name="br0" /></network>

Use the file to define the new network:

virsh net-define ./bridge.xml 

Start the network and configure it for auto-start

 virsh net-start br0virsh net-autostart br0   

Now I can use this network on the Virtual Machines 

For example using virt-install –network option

  Next step is to setup 3 machines and K8s

openshift

openshift k8s kubernetes

Published 26/08/2021

One Monitor Two Macbooks

 

I have on my desk now 2 MacBooks Pro a monitor, a keyboard and a magic mouse. For the two computers to share the monitor, keyboard and mouse I should buy a KVM but I don’t want to have too many cables on the desk and also the cost of the KVM for the macbooks is too expensive for me in Brazil.

I found an interesting solution which was to connect each macbook using HDMI adapters to the monitor and use a software to switch the keyboard and mouse between the computers.

I’m testing Barrier and so far everything is working fine.

There is feature very cool :  You can copy and paste from one computer to another.

You can see this video and see how it works

Uncategorized

desktop kvm

Published 12/08/2021

A career change

For over 20 years I worked with Lotus/IBM technologies most notably Domino/Notes, Sametime, IBM WebSphere, IBM Websphere Portal, IBM Watson and lastly Maximo Asset Manager and NodeRed on IoT projects.

Many years working with IBM and now working at IBM.

I started my career at IBM as Customer Success Manager – Architect Cloud & Data Platform

Many new things to learn and many challenges. I am part of a diverse, bright team with a lot of drive to ensure the success of our customers using IBM technologies.

 

Change

Published 08/06/2021

Domino V12 and Verse 2.1 How to add a Photo URL

Today i setup a Domino V12 server just for test some new features. A customer ask to use photos on Verse hosting photos on Domino.

Domino V12 comes with Verse 2.0. I just download the version 2.1 of Verse and follow the installation instructions.

After the setup i just put a URL of a PNG image on the person document, field photoURL  and add the entry VOP_GK_FEATURE_230=1 to the notes.ini of the server.

Works Great

Domino

Published 04/02/2021

Notes / Domino is forever

Yesterday it seemed like it would be an ordinary working day but a client called me informing about the expiration of a certifier. It would be normal to resolve the problem with the re-certification procedures but it was a special certificate.

This client has been using Notes/Domino since version 4.0.  When I saw the certificate creation date 05/09/1996 I was impressed.

This customer uses the environment for mail and applications for 25 years!. How times flies

I started working for this client in 1999 by installing the first R5 server (5.0.4) on an IBM Netfinity 5500 Server running Windows NT 4.0.

The hardware is gone, the operating system and the administrators who created this certifer are no longer in the company.  I believe they never imagined that the day to re-certify would come.

I learned a lot from this client and from the environment they have.

There are dozens of servers, thousands of users, hundreds of applications and a lot of success history to tell.

 

Domino

Domino

Published 21/01/2021

Restart Domino HTTP task using a Program Document

1. Open the Domino directory
2. Select the Server view
3. Select Programs view
4. Click Add Program
5. Under the Basics tab and in the field Program name enter: nserver
6. In the Command line enter:
    -c “tell http restart” ( for restarting the HTTP Task )
 7. Fill in the Server to run on field and also set a schedule under the Schedule tab.
8. Save the document
If you want to see the schedule at the Domino console type show sched

Domino

Published 20/01/2021

Red Hat introduces new no-cost RHEL option

On December 8, 2020, Red Hat announced a major change to the enterprise Linux ecosystem: Red Hat will begin shifting our work from CentOS Linux to CentOS Stream on December 31, 2021. We and the CentOS Project governing board believe that CentOS Stream represents the best way to further drive Linux innovation. It will give everyone in the broader ecosystem community, including open source developers, hardware and software creators, individual contributors, and systems administrators, a closer connection to the development of the world’s leading enterprise Linux platform.

Now you can have a 100% RHEL no-cost subscription.

No-cost RHEL for customer development teams

We recognized a challenge of the developer program was limiting it to an individual developer. We’re now expanding the Red Hat Developer program to make it easier for a customer’s development teams to join the program and take advantage of its benefits. These development teams can now be added to this program at no additional cost via the customer’s existing subscription, helping to make RHEL more accessible as a development platform for the entire organization. Through this program, RHEL can also be deployed via Red Hat Cloud Access and is accessible on major public clouds including AWS, Google Cloud Platform and Microsoft Azure at no additional costs except for the usual hosting fees charged by your cloud provider of choice.

See details here

Linux

Published 14/01/2021

Proud to be an IBM Champion 2021

This history began in 2011 when the category IBM Champions for Social Business was created. At that time there were only 50.  During the following years I was also nominated in other categories such as IBM Middleware, IBM Cloud and recently IBM Watson IoT.

It is a journey of many years, a lot of learning and also knowledge sharing.

 

IoT

Published 22/12/2020

Remove encryption from Domino documents

When you create mail journaling you can encrypt all documents using the Administrator ID.  Last week a customer ask to add access for another user (developer). The Admin remove the database encryption but lots off documents remain encrypted . The solution was to remove the document encryption using the following steps:

To remove encryption from documents:

1. First, create a view named “Encrypted”. The view selection formula you use will vary depending on the type of database with which you are working.

 

  • If working in a mail file, then use the following:
      • SELECT (Encrypt = “1” |  EncryptionFlags = “2”)

    If you are working in a non-mail file and want to remove encryption from documents encrypted with a Private key, then use the following formula:

      • SELECT @IsAvailable(SecretEncryptionKeys)

    If you are working in a non-mail file and documents may be encrypted using either a Public or Private key, then use the following:

      • SELECT @All

    In the above scenario, if you want to remove encryption based on the Form or other field value, then remove the @All. For example: Select Form = “Report”.

    In other scenarios, use an ampersand (&) to add additional criteria to the selection formula. For example: Select Form=”Report” & @IsAvailable(SecretEncryptionKeys)

  • 2. Create an agent with the following code. Set it to run manually from Actions menu on all documents in the database.

Dim s As New notessession
Dim db As notesdatabase
Dim view As notesview
Dim doc As notesdocument
Dim nextdoc As notesdocument

Set db = s.currentdatabase
Set view = db.getview(“Encrypted”)
Set doc = view.getfirstdocument

While Not doc Is Nothing

  • Set nextdoc = view.getnextdocument(doc)
    'The below loop is mandatory to ensure that all $File entries are unecrypted
    Forall i In doc.items

    • If i.isencrypted Then
      • i.isencrypted=False

      End If

    End Forall
    'Must have at least 1 field encrypted in order to call Encrypt method
    Dim temp As New NotesItem(doc,"tempjunk","temp")
    temp.IsEncrypted=True
    Call doc.encrypt
    Call doc.save(True, False)
    'This portion can now remove the fields relative to encrypting the
    'single token encrypted field.
    Call doc.removeitem("$Seal")
    Call doc.removeitem("$SealData")
    Call doc.removeitem("SecretEncryptionKeys")
    Call doc.removeitem("Encrypt")
    Call doc.removeItem("tempjunk")
    Call doc.save(True, False)
    Set doc = nextdoc

Wend

Domino