Day: 31 October 2020

cumulus-basics

Today finally I have managed to get a very basic cumulus setup. It is annoying because I tried several months ago and found some issues with libvirt (and I opened a ticket but didnt follow up) and gave up.

Now it works. I just want to use KVM-QEMU and Vagrant, that I have already installed in my system. So based on the link, I just created a folder and copied the vagrant file. Then “vagrant up” and wait.

/cumulus/1s2l$ vagrant up
Bringing machine 'spine01' up with 'libvirt' provider…
Bringing machine 'leaf01' up with 'libvirt' provider…
Bringing machine 'leaf02' up with 'libvirt' provider…
==> leaf01: Box 'CumulusCommunity/cumulus-vx' could not be found. Attempting to find and install…
leaf01: Box Provider: libvirt
leaf01: Box Version: 4.2.0
==> leaf01: Loading metadata for box 'CumulusCommunity/cumulus-vx'
leaf01: URL: https://vagrantcloud.com/CumulusCommunity/cumulus-vx
==> leaf01: Adding box 'CumulusCommunity/cumulus-vx' (v4.2.0) for provider: libvirt
leaf01: Downloading: https://vagrantcloud.com/CumulusCommunity/boxes/cumulus-vx/versions/4.2.0/providers/libvirt.box
Download redirected to host: d2cd9e7ca6hntp.cloudfront.net
==> leaf01: Successfully added box 'CumulusCommunity/cumulus-vx' (v4.2.0) for 'libvirt'!
==> spine01: Box 'CumulusCommunity/cumulus-vx' could not be found. Attempting to find and install…
spine01: Box Provider: libvirt
spine01: Box Version: 4.2.0
==> leaf01: Uploading base box image as volume into Libvirt storage…
==> spine01: Loading metadata for box 'CumulusCommunity/cumulus-vx'
spine01: URL: https://vagrantcloud.com/CumulusCommunity/cumulus-vx
Progress: 0%==> spine01: Adding box 'CumulusCommunity/cumulus-vx' (v4.2.0) for provider: libvirt
Progress: 0%==> leaf02: Box 'CumulusCommunity/cumulus-vx' could not be found. Attempting to find and install…
leaf02: Box Provider: libvirt
leaf02: Box Version: 4.2.0
Progress: 1%==> leaf02: Loading metadata for box 'CumulusCommunity/cumulus-vx'
leaf02: URL: https://vagrantcloud.com/CumulusCommunity/cumulus-vx
==> leaf02: Adding box 'CumulusCommunity/cumulus-vx' (v4.2.0) for provider: libvirt
==> leaf01: Creating image (snapshot of base box volume).
==> spine01: Creating image (snapshot of base box volume).
==> leaf02: Creating image (snapshot of base box volume).
==> leaf01: Creating domain with the following settings…
==> leaf01: -- Name: 1s2l_leaf01
==> leaf02: Creating domain with the following settings…
==> spine01: Creating domain with the following settings…
==> leaf02: -- Name: 1s2l_leaf02
==> spine01: -- Name: 1s2l_spine01
==> leaf01: -- Domain type: kvm
==> leaf02: -- Domain type: kvm
==> spine01: -- Domain type: kvm
==> leaf01: -- Cpus: 1
==> leaf02: -- Cpus: 1
==> spine01: -- Cpus: 1
==> leaf01: -- Feature: acpi
==> leaf02: -- Feature: acpi
==> spine01: -- Feature: acpi
==> leaf01: -- Feature: apic
==> leaf01: -- Feature: pae
==> leaf01: -- Memory: 768M
==> leaf02: -- Feature: apic
==> spine01: -- Feature: apic
==> spine01: -- Feature: pae
....
....

You can check the VMs are up:

/cumulus/1s2l$ vagrant status
Current machine states:
spine01 running (libvirt)
leaf01 running (libvirt)
leaf02 running (libvirt)
This environment represents multiple VMs. The VMs are all listed
above with their current state. For more information about a specific
VM, run vagrant status NAME.
/cumulus/1s2l$

And we can login and create some network interfaces as per documentation:

/cumulus/1s2l$ vagrant ssh leaf01
Linux leaf01 4.19.0-cl-1-amd64 #1 SMP Cumulus 4.19.94-1+cl4u5 (2020-07-10) x86_64
Welcome to Cumulus VX (TM)
Cumulus VX (TM) is a community supported virtual appliance designed for
experiencing, testing and prototyping Cumulus Networks' latest technology.
For any questions or technical support, visit our community site at:
http://community.cumulusnetworks.com
The registered trademark Linux (R) is used pursuant to a sublicense from LMI,
the exclusive licensee of Linus Torvalds, owner of the mark on a world-wide
basis.
vagrant@leaf01:mgmt:~$ net add interface swp1,swp2,swp3
vagrant@leaf01:mgmt:~$ net commit
--- /etc/network/interfaces 2020-07-15 01:15:58.000000000 +0000
+++ /run/nclu/ifupdown2/interfaces.tmp 2020-10-31 14:12:30.826000000 +0000
@@ -5,15 +5,24 @@
# The loopback network interface
auto lo
iface lo inet loopback
# The primary network interface
auto eth0
iface eth0 inet dhcp
vrf mgmt
+auto swp1
+iface swp1
+
+auto swp2
+iface swp2
+
+auto swp3
+iface swp3
+
auto mgmt
iface mgmt
address 127.0.0.1/8
address ::1/128
vrf-table auto
net add/del commands since the last "net commit"
User Timestamp Command
------- -------------------------- --------------------------------
vagrant 2020-10-31 14:12:27.070219 net add interface swp1,swp2,swp3
vagrant@leaf01:mgmt:~$

And after configuring the interfaces in the three VMs, we have LLDP working:

/cumulus/1s2l$ vagrant ssh leaf01
Linux leaf01 4.19.0-cl-1-amd64 #1 SMP Cumulus 4.19.94-1+cl4u5 (2020-07-10) x86_64
Welcome to Cumulus VX (TM)
Cumulus VX (TM) is a community supported virtual appliance designed for
experiencing, testing and prototyping Cumulus Networks' latest technology.
For any questions or technical support, visit our community site at:
http://community.cumulusnetworks.com
The registered trademark Linux (R) is used pursuant to a sublicense from LMI,
the exclusive licensee of Linus Torvalds, owner of the mark on a world-wide
basis.
Last login: Sat Oct 31 14:12:04 2020 from 10.255.1.1
vagrant@leaf01:mgmt:~$
vagrant@leaf01:mgmt:~$
vagrant@leaf01:mgmt:~$
vagrant@leaf01:mgmt:~$ net show lldp
LocalPort Speed Mode RemoteHost RemotePort
--------- ----- ------- ---------- ----------
swp1 1G Default spine01 swp1
swp2 1G Default leaf02 swp2
swp3 1G Default leaf02 swp3
vagrant@leaf01:mgmt:~$
vagrant@leaf01:mgmt:~$ net show system
Hostname……… leaf01
Build………… Cumulus Linux 4.2.0
Uptime……….. 0:06:09.180000
Model………… Cumulus VX
Memory……….. 669MB
Vendor Name…… Cumulus Networks
Part Number…… 4.2.0
Base MAC Address. 52:54:00:17:87:07
Serial Number…. 52:54:00:17:87:07
Product Name….. VX
vagrant@leaf01:mgmt:~$ exit

So I am happy because now I have something to play with and try to build an MPLS lab with cumulus. At some point I would like to try some quaga/frr lab.

I am pretty sure that in the past, I didnt have to type my password every single time I run a vagrant command….

Ok, we can shutdown the VMs and start the work for the next time:

/cumulus/1s2l$ vagrant halt spine01 leaf01 leaf02
==> leaf02: Halting domain…
==> leaf01: Halting domain…
==> spine01: Halting domain…
/cumulus/1s2l$
/cumulus/1s2l$
/cumulus/1s2l$ vagrant status
Current machine states:
spine01 shutoff (libvirt)
leaf01 shutoff (libvirt)
leaf02 shutoff (libvirt)
This environment represents multiple VMs. The VMs are all listed
above with their current state. For more information about a specific
VM, run vagrant status NAME.
/cumulus/1s2l$

WisdomOfInsecurity

I finished reading this book last night. To be honest, it has been hard to read and digest. Very hardcore philosophical for my level. To put things a bit on perspective, the book was written on 1954… and half way the book you realize that things he talks about are still pretty valid nowadays. Without noticing, he is taking a approach to Easter philosophy (Buddhism) in contrast to the Western one. We are very focus in the “I”, in the material world, etc. We try to get things defined as something static and we need that for security. Our brain is the one leading the shots but taking a different approach, accepting the insecurity (you can’t control everything, you can’t know everything) you can live a less stressful and meaningful life.

Again, this is the typical book I should read 30 times to get really a full understanding.

CV

Today I came across a video (not recent) about Cristian Varela (strange there is no Wikipedia entry about him). He is one of my favourite techno DJs and a legend in the Spanish Techno scene. I learnt a couple of things from that video, he is the son of a famous Spanish actor, he is working in different projects apart from “just” techno gigs and production, and he went through a sharp drop in his career but he is back (how important is to have good people around…)

As somebody very wise told me: “Techno always makes friends”

Here two massive sessions: percussion and tokyo