Machine/bender

Hostnames

• bender.sugarlabs.org

Hardware

• HPE ProLiant DL360 Gen10 1RU server
  • Dual socket, current configuration has one CPU
• Xeon Gold 5218R
  • 20 cores/40 threads
  • 2.1GHz base frequency, 4.0GHz max turbo frequency
  • 27.5MB of cache
• 64GB RAM
• 2TB NVMe SSD
• Ubuntu 20.04.2 LTS

Info

Owned by Sugar Labs, Inc. Hosted by Sonic in Santa Rosa, CA

Bender and Papert are two twin KVM hosts bought by Sugar Labs in 2021.

Admins

• Alex Perez, MrBIOS on #sugar Libera.chat IRC network
• Bernie Innocenti, bernie on #sugar Libera.chat IRC network

Network configuration

Network configuration is managed via netplan. To modify, do:

vi /etc/netplan/bender.yaml
netplan generate
netplan apply

IPv4

Bender is globally accessible through a public, static IPv4 address.

Sonic assigned a /28 network to Sugar Labs. IP assignments are managed in our DNS configuration. Search for "Sonico IP pool" in masters/sugarlabs.org.zone.

IPv6

IPv6 configuration is being discussed with Sonic net admins.

Bridges

The br0 bridge is created at startup and shared with the virtual machines hosted on Bender. It gives the VMs unfiltered access to the external network. There's no DHCP, all machines must define a static IP configuration, taking care not to stomp onto each other.

There is also a virbr0 bridge created by libvirt on startup from /etc/libvirt/qemu/networks/default.xml. This is a NAT interface and is not meant for VMs directly serving on the Internet.

Guests simply need to be configured to accept IPv6 routing advertisements. The DNS must be assigned manually.