Yocto

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•  TODO

Installer

The compilation and installation of the Yocto version of SEAPATH is entirely described on the GitHub repository seapath/yocto-bsp.

Debian Installer

To install the cluster, you need to generate an ISO, based on Debian 11, for each host with this repository here.

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See the below section for more details on the configuration file.

Configuration

In the configuration file, you must define these variables:

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However, all host will be with the same IP address.

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When the host is installed, the ansible/playbooks/cluster_setup_prerequisdebian.yaml need to launch to finish the installation.

The inventory must define these variables to run the playbook:

• apply_network_config: Boolean to apply the network configuration

• admin_ip_addr: IP address for SNMP

• cpumachinesnort: Range of allowed CPUs for no RT machines

• cpumachines: Range of allowed CPUs for machines (RT and no RT)

• cpumachinesrt: Range of allowed CPUs for RT machines

• cpuovs: Range of allowed CPUs for OpenVSwitch

• cpusystem: Range of allowed CPUs for the system

• cpuuser: Range of allowed CPUs for the user

• irqmask: Set the IRQBALANCE_BANNED_CPUS environment variable, see irqbalance manual

• logstash_server_ip: IP address for logstash-seapath alias in /etc/hosts

• main_disk: Main disk device to observe his temperature

• workqueuemask: The negation of the irqmask (= ~irqmask)

In this part, the playbook define the scheduling and the prioritization (see the section).

Disks

The disk is composed:

1. (If the installation is in UEFI) EFI partition in /boot/efi with VFAT filesystem (512 MB).
2. Boot partition in /boot with ext4 filesystem (500 B).
3. Main partition with LVM configuration (30 GB). This partition is divided into 3 parts:
   1. Root partition in / with ext4 filesystem (7 GB).
   2. Log partition in /var/log with ext4 filesystem (1 GB).
   3. Swap partition (500 B).

This can be changed in the build_debian_iso/srv_fai_config/disk_config/ directory. There is always 2 versions (one in Legacy BIOS and an other in UEFI mode with the suffix "_EFI").

Virtual cluster

On the host, you must set these sysctl settings:

net.bridge.bridge-nf-call-arptables = 0
net.bridge.bridge-nf-call-ip6tables = 0
net.bridge.bridge-nf-call-iptables = 0

You must define 3 network interfaces on each host of your cluster.

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