10.11.2019

Oracle Cloud: Feature Set

For all readers, who want to get a short overview to the services which can be configured inside Oracle Cloud, here a walkthrough the menus.
The Main menu shows the following items:
  • Core infrastructure
    • Compute
    • Block Storage
    • Object Storage
    • File Storage
    • Networking 
  • Database
    • Bare Metal, VM, and Exadata
    • Autonomous Data Warehouse
    • Autonomous Transaction Processing
    • Data Sale
    • Exadata Cloud Connector
  • Solution and Patterns
    • Analytics
    • Resource Manager
    • Email Delivery
    • Application Integration
    • Monitoring
    • Developer Services Marketplace
  • Governance and Administration
    • Account Management
    • Identity
Inside the Compute item the following services can be found:
  • Compute
    • Instances
    • Dedicated Virtual Hosts
    • Instance Configurations
    • Cluster Networks
    • Autoscaling Configurations
    • Custom Images
    • Boot Volumes
    • Boot Volume Backups
  • Block Storage
    • Block Volumes
    • Block Volume Backups
    • Volumes Groups
    • Volume Group Backups
  • Object Storage
    • Object Storage
    • Data Transfer
  • File Storage
    • File Systems
    • Mount Targets
  • Networking
    • Virtual Cloud Networks
    • Dynamic Routing Gateways
    • Customer-Premises Equipments
    • IPSec Connections
    • Load Balancers
    • FastConnect
    • Public IPs
    • DNS Zone Management
    • Traffic Management Steering Policies

  • Administration
    • Tenancy Details
    • Announcements


The menu Database has no subitems.

For most of these services you can find documentation here:
https://docs.cloud.oracle.com/iaas/Content/home.htm




11.10.2019

Oracle cloud: Login

Main problem for login into Oracle cloud is to there is no generic login URL.
Inside the mail Oracle sent after the registration there is a specific URL. Something like:
http://app.response.oracle-mail.com/e/er?elq_mid=920.......
But this ends after some seconds at:

https://cloud.oracle.com/en_US/sign-in


There is also another login page, but this one does not work for my setup:

https://login.eu-frankfurt-1.oraclecloud.com/v1/oauth2/authorize


For this one i did not find any documentation at all, so i somebody knows how this login page can be used, please add a comment...

01.10.2019

Oracle Cloud: my first VM

After some problems with signing up i created my first vm inside Oracle Cloud:






 and then a short stop for provisioning:


 And finally:


The machine runs and a login can be done with:

schroff@zerberus:~/.ssh$ ssh 130.61.89.226 -l opc
[opc@myVmInstanceDS ~]$ df -h
Filesystem      Size  Used Avail Use% Mounted on
devtmpfs        459M     0  459M   0% /dev
tmpfs           486M     0  486M   0% /dev/shm
tmpfs           486M   13M  473M   3% /run
tmpfs           486M     0  486M   0% /sys/fs/cgroup
/dev/sda3        39G  1,9G   37G   5% /
/dev/sda1       200M  9,7M  191M   5% /boot/efi
tmpfs            98M     0   98M   0% /run/user/1000
[opc@myVmInstanceDS ~]$ 

27.09.2019

Oracle cloud: sign up: after nearly 2 weeks...

After trying to get around my problems with my
i was able to sign up at Oracle cloud services.
Thanks to Oracle support for the e-mails with tips and explanations what i have to do!

And after some seconds i got the following e-mail:

And the sign in worked:

With the next postings i will try to get some VMs etc. running inside Oracle Cloud...

24.09.2019

500 blog posts (in 12 years)

Last week i did my 500th posting - not really "run like hell" but i think better than nothing.
Here some statistics:




I think, i will continue for another 500. The exciting point is, wether i will find enough topics, which i am interested in...

13.09.2019

Oracle Sign up: more problems

I thought, i was successful, but:

I received a mail with the following content:

"We have re-authorized a new, specific amount on the credit/debit card used during the sign up process."

and

"To verify the account you have created, please confirm the specific amount re-authorized."


My problem: there is not any "re-authorized amount" on my banking account. I do not know, what is "re-authorized"?
Is this: this amount is charged on my credit card (then i should see it).
Or is this process buggy and i was for some reason not charged?
Or is re-authorization something else?



12.09.2019

Oracle Cloud: First login

After signing up to Oracle cloud i tried my first login:

https://cloud.oracle.com/en_US/sign-in


but i only got:
I think the problem is, that there i a manual review step on Oracle's side which i have not passed for now:
So let's wait for a day or two...

10.09.2019

Oracle Cloud: Sign up failed... [3] & solved

Finally (see my attempts here and here) i was able to sign up to Oracle cloud.
What did the trick?

I got help from Oracle support:
So i used my gmail address and this worked:

and then:

Let's see how this cloud will work compared to Azure and AWS

06.09.2019

Oracle Cloud: Sign up failed... [2]

After my failed registration to Oracle cloud, i got very fast an email from Oracle support with the following requirements:
So i tried once again with a firefox "private" window - but this failed again.
Next idea was to use a completely new installed browser: so i tried with a fresh google-chrome.
But the error still remained:
Let's hope Oracle support has another thing which will put me onto Oracle cloud.

UPDATE:


 
There is a tiny link "click here" just abouve the blue button. This link a have to use with the verification code provided by Oracle support.
But then the error is:
I checked this a VISA and MASTERCARD. Neither of them worked...

UPDATE 2: see here how the problem was solved.

01.09.2019

Oracle Cloud: Sign up failed...

Yesterday i tried to sign up for oracle cloud:

 So let's start the registration process:


The mobile number verification is done with SMS and after entering the 7 digit pin, you are allowed to enter a password:

As payment information only credit cards are accepted:
  • VISA
  • Mastercard
  • Amex


Eve though my credit card was accepted:



"Your credit card has been successfully validated. Please proceed to complete the Sign up."
I got the following error:

"We're unable to process your transaction. Please contact Oracle Customer Service."
The link "Oracle Customer Service" did not work, so i used the Chat Support. But inside the chat was no agent available and only "Send E-Mail" worked. Let's see what kind of response i will be given...

EDIT: Some further attempts...

EDIT 2: see here how the problem was solved.  

31.08.2019

Ubuntu Linux: Change from Legacy boot to UEFI boot after installation

This weekend i did an installation of Linux on a laptop where already a windows 10 was installed.
Because laptop did not recognize my linux boot usb-stick i changed from UEFI to legacy mode and the installation went through without any problem.

At the end grub was in place but the windows installation was not listed. This is, because windows does not support booting.

The problem: If i switch back to UEFI the linux installation did not start anymore.

My solution:
  • Change to UEFI and boot with a live linux
  • Install boot-repair into the live linux
    (https://help.ubuntu.com/community/Boot-Repair)
    sudo add-apt-repository ppa:yannubuntu/boot-repair
    sudo apt-get update
    sudo apt-get install -y boot-repair
  • Then run boot repair
    boot-repair
  • Follow the instructions on the Boot-Repair homepage (s. above)
  • Enter the commands of the following popus:


And after removing the live CD i got an boot grub menu, where windows was in place and working (and the Ubuntu Linux worked, too ;-)

16.08.2019

Linux: Configuring hosts per ssh in parallel: pssh

If you have to set up some hosts in a way, that a number of commands has to be executed on each node, than you should consider PSSH:

http://manpages.ubuntu.com/manpages/bionic/man1/parallel-ssh.1.html

The installation is straight forward:
root@zerberus:~# apt-get install pssh
Paketlisten werden gelesen... Fertig
Abhängigkeitsbaum wird aufgebaut.       
Statusinformationen werden eingelesen.... Fertig
Die folgenden Pakete wurden automatisch installiert und werden nicht mehr benötigt:
  btrfs-tools geoip-database-extra libcryptui0a libjs-openlayers seahorse-daemon
Verwenden Sie »apt autoremove«, um sie zu entfernen.
Die folgenden NEUEN Pakete werden installiert:
  pssh
0 aktualisiert, 1 neu installiert, 0 zu entfernen und 8 nicht aktualisiert.
Es müssen 29,0 kB an Archiven heruntergeladen werden.
Nach dieser Operation werden 135 kB Plattenplatz zusätzlich benutzt.
Holen:1 http://de.archive.ubuntu.com/ubuntu bionic/universe amd64 pssh all 2.3.1-1 [29,0 kB]
Es wurden 29,0 kB in 0 s geholt (71,0 kB/s).
Vormals nicht ausgewähltes Paket pssh wird gewählt.
(Lese Datenbank ... 488993 Dateien und Verzeichnisse sind derzeit installiert.)
Vorbereitung zum Entpacken von .../archives/pssh_2.3.1-1_all.deb ...
Entpacken von pssh (2.3.1-1) ...
pssh (2.3.1-1) wird eingerichtet ...
Trigger für man-db (2.8.3-2ubuntu0.1) werden verarbeitet ...
But executing on ubuntu is a little bit tricky:
If you want to do a test, you have to know, that ubuntu has renamed the binary to parallel-ssh. pssh is not known at commandline:

schroff@zerberus:~$ parallel-ssh -i -H "localhost 127.0.0.1" ls -l .bashrc
[1] 00:04:48 [SUCCESS] 127.0.0.1
-rw-r--r-- 1 schroff schroff 3815 Jul 14  2017 .bashrc
[2] 00:04:48 [SUCCESS] localhost
-rw-r--r-- 1 schroff schroff 3815 Jul 14  2017 .bashrc
Please note the syntax highlighting, which i found very helpful:

04.08.2019

Oracle VM Server: Why the server uuid is important and why changes to this uuid are critical

After working a while with Oracle VM server it turns out, that a very important parameter is the UUID of a Oracle VM server.

This UUID is used by the ovs-agent (take a look at the Oracle documentation). Here a few excerpts of these chapter:
The Oracle VM Agent is a daemon that runs within dom0 on each Oracle VM Server instance. Its primary role is to facilitate communication between Oracle VM Server and Oracle VM Manager.
[...]
Oracle VM Agent is responsible for carrying out all of the configuration changes required on an Oracle VM Server instance, in accordance with the messages that are sent to it by Oracle VM Manager.
[...]
If you wish to allow another Oracle VM Manager instance to take ownership of the server, the original Oracle VM Manager instance must release ownership first.
[...]
Oracle VM Agent also maintains its own log files on the Oracle VM Server that can be used for debugging issues on a particular server instance or for auditing purposes. 

The oracle vm server gets identified at the oracle vm manager by its UUID. There is a very nice blogposting from Bjorn Naessens:
https://bjornnaessens.wordpress.com/2012/08/10/best-practices-in-ovm-2-fakeuuid-it/
He made his way through the source code and comes up with the following important things about this uuid:


From an architectural point of view, this is a really bad way, because the UUID will change, if you change the motherboard SMBIOS oder change a network MAC.
With loosing your UUID, the OVS-agent will no longer communicate with your OVM-manager and therfore you can not start/stop any VM on that host.

You can get the UUID of a server from the OVM Manager GUI:
(--> "Servers and VMs": select the server on the tree under "server pools" --> change the dropdown to "info")

How to fix a UUID change can be found here:
https://hadafq8.wordpress.com/2016/03/22/oracleovmovm-server-uuid-challenges/