Docker: Lessons learned – Logging

After some time working with docker here my experiences:

Some days ago i created my own container with a minimal web service.

Here the
sed -i  's/Hostname:.*/Hostname: '$HOSTNAME'/g' index.html
while true; do { echo -e 'HTTP/1.1 200 OK\r\n'; cat index.html;}  | nc  -l -p 8080  2>&1 >> logfile; done
This is the Dockerfile:
FROM alpine


RUN mkdir ncweb

ADD .  /tmp

ENTRYPOINT [ "/tmp/" (more...)

Virtualbox: failed & Run ‘make oldconfig && make prepare’

After updating to ubuntu 18.04 i had to reinstall virtualbox:

# dpkg -i virtualbox-5.2_5.2.10-122088~Debian~stretch_amd64.deb 
Vormals nicht ausgewähltes Paket virtualbox-5.2 wird gewählt.
(Lese Datenbank ... 378316 Dateien und Verzeichnisse sind derzeit installiert.)
Vorbereitung zum Entpacken von virtualbox-5.2_5.2.10-122088~Debian~stretch_amd64.deb ...
Entpacken von virtualbox-5.2 (5.2.10-122088~Debian~stretch) ...
virtualbox-5.2 (5.2.10-122088~Debian~stretch) wird eingerichtet ...
addgroup: Die Gruppe »vboxusers« existiert bereits als Systemgruppe. Programmende. failed: Look at /var/log/vbox-install. (more...)

Ubuntu 16.04: Installation of chrome-browser fails with libnss3 (>= 2:3.22)

On my old laptop with ubuntu 16.04 i tried to install "chrome-browser":
# dpkg -i google-chrome-stable_current_amd64\ \(1\).deb 
Vormals nicht ausgewähltes Paket google-chrome-stable wird gewählt.
(Lese Datenbank ... 137351 Dateien und Verzeichnisse sind derzeit installiert.)
Vorbereitung zum Entpacken von google-chrome-stable_current_amd64 (1).deb ...
Entpacken von google-chrome-stable (64.0.3282.186-1) ...
dpkg: Abhängigkeitsprobleme verhindern Konfiguration von google-chrome-stable:
 google-chrome-stable hängt ab von libnss3 (>= 2:3.22); aber:
  Version von libnss3:amd64 auf dem System ist 2:3.21-1ubuntu4.


Oracle SOA Suite 12c: Invoking a BPEL process via Jdeveloper

After you deployed a BPEL process to your application server open the application server view in Jdeveloper:
 Open the BPEL inside the Application Server view:
 Do a right click on the BPEL process and select "Test Web Service":
 This will open the HTTP Analyzer:
 Fill in your XML input and click "Send Request". After that you will see:

Very nice are the options via the tab at the bottom:
  • SOAP Strucutre
  • HTTP Content
  • REST Structure
  • (more...)

Run like Hell 2018-05-02 11:37:00

Yesterday redhat announced a new framework to build applications with kubernetes:
The concept of operator framework was build in 2016 from coreos.
CoreOS released the same announcement as redhat. Not really amazing, because:

Here some text snippets from the announcement:
The Operator Framework includes:
  • Operator SDK: Enables developers to build Operators based on their expertise without requiring knowledge of Kubernetes API complexities.
  • Operator Lifecycle Management: Oversees installation, updates, and management of the lifecycle (more...)

Oracle Linux 7.5 released ?!

Oracle released its Linux in version 7.5 without a announcement on their webpages. If you ask google
oracle linux 7.5
you will be directed to this site:

But with the right search string you can find Oracle Linux 7.5 inside

The new features can be found here:
or here:

Ubuntu: Upgrade from 17.10 to 18.04

Last week ubuntu release 18.10 and i upgraded my notebook to the latest version.
I was running 17.10 with wayland:

$ lsb_release  -a
No LSB modules are available.
Distributor ID:    Ubuntu
Description:    Ubuntu 17.10
Release:    17.10
Codename:    artful

# do-release-upgrade -d
Neue Veröffentlichungen von Ubuntu werden gesucht
Holen:1 Signatur der Aktualisierungsanwendung [819 B]                                                                                                                                                                                  
Holen:2 Aktualisierungsanwendung [1.257 kB]                                                                                                                                                                                            
Es wurden 1.258 kB in 0 s geholt (0 B/s)                                                                                                                                                                                               
»bionic. (more...)

Oracle SOA Suite 12c: complete startup procedure including database and application server

After the first reboot i had to work hard to get the complete system up again. So here a list of all commands:

  1. database
    export ORACLE_HOME=/home/oracle/app/oracle/product/12.2.0/dbhome_1
    export PATH=$PATH:$ORACLE_HOME/bin
    export ORACLE_SID=orcl

    $ sqlplus / as sysdba

    SQL*Plus: Release Production on Fri Feb 16 20:53:02 2018

    Copyright (c) 1982, 2016, Oracle.  All rights reserved.

    Connected to an idle instance.

    SQL> startup
    ORACLE instance started.

    Total System Global Area 1560281088 (more...)

Oracle VM Server: How to add ISO images to your repository

After  setting up
you have to upload some ISO images to your repository, so that your virtual machines can boot with these ISO images.

So inside Oracle VM Manager go to the "Repositories" tab and use the "import iso icon" (the blue arrow):

The only way to import ISO images is to give a URL to Oracle (more...)

Oracle VM Server: my first vm: Error: HVM guest support is unavailable

All my tests with Oracle VM Server are running inside Oracle Virtualbox. If you want to do some tests yourself with this setup, you can easily get this error message after powering on your VM:

Server error: Command: ['xm', 'create', '/OVS/Repositories/0004fb0000030000dad74d9c43176d2e/VirtualMachines/0004fb00000600005e79798ecb1a63cf/vm.cfg'] failed (1): stderr: Error: HVM guest support is unavailable: is VT/AMD-V supported by your CPU and enabled in your BIOS?
stdout: Using config file "/OVS/Repositories/0004fb0000030000dad74d9c43176d2e/VirtualMachines/0004fb00000600005e79798ecb1a63cf/vm.cfg".
To get your system running, you have (more...)

Docker: How to build you own container with your own application

atThere are many tutorials out there, how to create a docker container with a apache webserver inside or a nginx.
But you can hardly find a manual how to build your own docker container without pulling everything from a foreign repository.
Why should you not pull everything from foreign repositories?

You should read this article or this:
But since each phase of the development pipeline is built at a different time, …
…you can’t (more...)

Oracle SOA Suite 12c: Invoking a BPEL process via Enterprise Manager (EM)

After you logged in via http://yourhost:7001/em navigate to "soa-infra":
 Then choose "Deployed Composites":
 There you have to click on your composite (here: "Project1"):
 Choose "Test":
 Go to the bottom of the page and expand the payload:
 There you have  fill in your test string:
 And after a click on "Test Web Service"
The response is shown incl. the response time.

To list the audit trails goto "Home-> Flow instances

And choose "search" on the right side:

Oracle VM Server x86: Creation of a virtual machine

After all these steps
it is possible to create a VM:

 Click the third icon:

And here is the summary:
One thing still missing: I did not put an ISO image into the repository, so this VM has no media to start from. The Import of an ISO image i will post in a week.

Ubuntu: unmet dependencies gparted (libparted-fs-resize0 (>= 3.1))

After a new ubuntu installation i got the following error:
root@pc:/etc/apt/sources.list.d# apt install   gparted
Paketlisten werden gelesen... Fertig
Abhängigkeitsbaum wird aufgebaut.   
Statusinformationen werden eingelesen.... Fertig
Einige Pakete konnten nicht installiert werden. Das kann bedeuten, dass
Sie eine unmögliche Situation angefordert haben oder, wenn Sie die
Unstable-Distribution verwenden, dass einige erforderliche Pakete noch
nicht erstellt wurden oder Incoming noch nicht verlassen haben.
Die folgenden Informationen helfen Ihnen vielleicht, die Situation zu lösen:

Oracle VM Server: supported guest systems

After the installation of


the next step is to install a guest. But which operating systems are supported on Oracle VM Server?
Let's look into the official Oracle documentation:
The list of supported operating systems can be found here.

Table 5.1 HVM-Supported Linux Guest Operating Systems
Guest Operating System
HVM 32-bit
HVM 64-bit
Oracle Linux Release 7.x
Oracle Linux Release 6.x
Oracle Linux (more...)

Oracle 12c SOA Suite: Administration via Enterprise Manager


i want to present some screenshots of the web console of the SOA Suite:
But first the servers have to be started:
cd /home/oracle/Oracle/Middleware/Oracle_Home/user_projects/domains/base_domain/bin
nohup ./ &
nohup ./ &
Now the login is available:

 But there the soa_server1 is still down:

 So let's start this one:
nohup . (more...)

Oracle SOA Suite 12c: Tokens – To avoid substituting values: define global token variables

Inside the Enterprise Manager (URL: http://yourhost:7001/em) you can configure SOA Suite profiles:

Choose "Token Configurations"


To list the tokens click on "Modify Configuration file":

 To add a token click on the green plus:

 Do not forget to save your changes:

To use the bulk append you have to create a file like this one:

Choose your file "text.xml":
 and click on "Append":

Java 10 released: java with some enhancements for running inside docker

After the release of Java 9 in october 2017 with its new features
Oracle released Java 10:
 A short summary of the new feature can be found
or you can take a look a the release notes:

My favourites are:
  • JEP 307 Parallel Full GC for G1  Improves G1 worst-case latencies by making the (more...)

Oracle VM Server x86: Discovering a server/node + setting up a repository, server pool and networking

Let's put the things together:
The Oracle VM Manager has to discover the node. Inside the web GUI (https://yourhost:7002/ovm/console)  clickt on the right icon:

Then give your password and the ip(s):

And then you can see the node details (if the connections does not fail):

The next step is to create a repository. To achieve this, you have to add a additional hdd (more...)

AVM: Powerline Repeater / Fritz Repeater

Last weekend my Powerline Adpater 546E broke. I tried some restarts but after 1-5 minutes the WLAN went down and the adapter got really hot.

Perhaps the missing mesh functionality was due to a hardware problem which caused this total failure.

Never mind. I ordered a Fritz Box Repeater 1160 and followed the instructions from AVM:
Note: If your repeater is already connected to your FritzBox and you perform the firmware update >6.90, then (more...)