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The PLC4X Project VM
As, especially for the raw socket functionality of PLC4X, our project had higher demands on the infrastructure as other projects. Apache Infra kindly provided us with a dedicated VM.
This is included as build agent into Apache’s Jenkins with the label
plc4x1 and is marked for exclusive usage by our project.
The host name of this machine is:
On this machine we can even
sudo to perform operations only available to
Project members can request access to the machine.
In order to be able to login, users need to add their SSH public key to their Apache ID first.
This is done under the following url: https://id.apache.org/
Here just add the content in the follwoing format to one of the
SSH Key (authorized_keys line) fields:
(I just had to copy this line from my
|Note, the Email Address in the end doesn’t seem to matter, I simply added it for the sake of completeness. So if this doesn’t match your Apache email, this is not a problem.|
As soon as that’s done, access needs to be requested from Apache Infra.
This is done using the Infra Jira at: https://issues.apache.org/jira
Here make sure to select the Project
As soon as that’s handled by the Infra team, you should be ready to log-in on the machine.
Login to the machine
Using SSH we should now be able to login to the VM.
Be sure to use the username matching your Apache ID or the login will fail.
If all wen’t well you should now be able to login to the machine using your apache user.
Doing things as
Apache Infra is great at keeping things safe. Providing a sudo password directly would increase the danger of having this intercepted, therefore they are using a tool called
Instead of now entering a password, a challenge is displayed:
myid@plc4x-vm:~$ sudo apt-get update otp-md5 496 pl8230 Password:
If you now enter your normal password, you’ll simply get
permission denied errors.
In order to execute operations as root on the machine, you need to get a client. Everything needed is documented here: https://reference.apache.org/pdf.lua?/committer/opie
As soon as you have your OPIE client installed and running, you need to copy the first line of the response:
otp-md5 496 pl8230
into your OPIE client’s
challenge field (In case of SkeyCalc).
password field you provide your Apache LDAP password. When hitting enter or clicking on
Calc & Copy the tool should automatically copy the response.
Now all you need to do is paste that as password into your SSH client session.
For being able to build the charts and graphics as part of the site generation, we need to add some additional packages:
sudo apt-get install python-seqdiag sudo apt-get install python-nwdiag