8. Platform system OS configuration (reference only)
This chapter describes the resulting configuration on the server OS as applied by the IPU-POD DA install script.
8.1. User accounts and groups
The following accounts are required as part of the default server configuration:
ipuuser |
An account dedicated to IPU-M2000 management and administration and related server setup is mandatory. This user requires “sudo” rights |
Normal user accounts for Poplar workloads |
Account(s) where Poplar SDK user(s) will carry out their ML tasks |
8.2. IPU-POD default usernames
The following table gives the default usernames for the IPU-M2000 system:
Log in to |
Username |
|---|---|
IPU-M2000 BMC OS |
root |
IPU-M2000 IPU-Gateway OS |
itadmin |
The default passwords for these accounts are available from the Graphcore support portal.
8.3. Network interfaces
8.3.1. IPU-POD DA network interfaces
The specified network devices during the IPU-POD DA installation will be the ones used for networking. Please consult the installation logs. The names vary between server type and OS installation.
8.4. Services
The IPU-POD DA server requires the following services to be installed for correct operation of the IPU-M2000 platform system.
8.4.1. gc-ipu-network service
This is a Graphcore provided service that allows the required network to be configured after a server restart. This service performs a set of actions in order to have a smaller footprint of changes to the server OS.
The service:
starts a DHCP server that deals with IPU-M2000 address allocation from the allocated IP subnet block entered when running the IPU-POD DA install script
configures IPv4 addresses for the local server interfaces that connect to the IPU-M2000s
configures port forwarding (if enabled during installation) so that web browsers on remote servers can access the V-IPU web user interface on the master IPU-M2000 in the IPU-POD.
The code for this service as well as its dependent tools and config files are located at:
/var/lib/gc-ipu-network
You can list the directories/files the gc-ipu-network system service uses for setting up the networking:
$ ls -l /var/lib/gc-ipu-network/
total 4
drwxr-xr-x 2 root root 73 Feb 16 17:42 bin
-rw-r--r-- 1 root root 274 Feb 16 15:51 config.json
drwxr-xr-x 7 root root 90 Feb 16 15:49 interfaces
drwxr-xr-x 2 root root 65 Feb 16 15:51 scripts
You can also list the DHCP leases:
busybox dumpleases -f /var/lib/gc-ipu-network/interfaces/eno1/udhcpd.leases
The IPU-POD DA install script makes this service execute every time the system boots up into a multi-user configuration.
ln -s /etc/systemd/system/multi-user.target.wants/gc-ipu-network.service /
etc/systemd/system/gc-ipu-network.service