Cluster Topology#
The Cluster Topology shown in Figure 1 shows the top level layout of the cluster. The cluster’s layout generally consists of virtualized systems which host web applications or infrastructure and bare-metal systems where the engineering workloads are performed. It is possible that all systems are virtualized but for high demanding computational and IO based workloads, bare-metal systems are recommended.
Figure 1: Cluster Topology#
A properly configured DNS server which provides a Fully Qualified Domain Name (FQDN) for each system or the use of a hosts file which defines the FQDN is required. Some services (e.g. FreeIPA/IdM) will not not function properly without FQDN hostnames being defined.
Guides only cover a simple network and do not cover redundant network interfaces which is recommended.
Operating Systems#
These guides are written for Red Hat Enterprise Linux 8 based operating systems and are compatible with AlmaLinux 8 and Rocky Linux 8. The guides identify any changes required for the different OS vendors.
Hostnames#
These guides use the following hostname and IPv4 address mappings as an example and will need to be modified for your production environment.
Note
An example /etc/hosts file has been provided: hosts
Hostname |
FQDN |
Function |
Type |
IPv4 Address |
|---|---|---|---|---|
nfs01 |
nfs01.engwsc.example.com |
NFS Storage |
Bare-Metal |
192.168.1.50 |
vmm01 |
vmm01.engwsc.example.com |
VM Manager 1 |
Bare-Metal |
192.168.1.51 |
vmm02 |
vmm02.engwsc.example.com |
VM Manager 2 |
Bare-Metal |
192.168.1.52 |
user01 |
user01.engwsc.example.com |
User Node 1 |
Bare-Metal |
192.168.1.60 |
user02 |
user02.engwsc.example.com |
User Node 2 |
Bare-Metal |
192.168.1.61 |
user03 |
user03.engwsc.example.com |
User Node 3 |
Bare-Metal |
192.168.1.62 |
user04 |
user04.engwsc.example.com |
User Node 4 |
Bare-Metal |
192.168.1.63 |
comp01 |
comp01.engwsc.example.com |
Compute Node 1 |
Bare-Metal |
192.168.1.64 |
comp02 |
comp02.engwsc.example.com |
Compute Node 2 |
Bare-Metal |
192.168.1.65 |
comp03 |
comp03.engwsc.example.com |
Compute Node 3 |
Bare-Metal |
192.168.1.66 |
comp04 |
comp04.engwsc.example.com |
Compute Node 4 |
Bare-Metal |
192.168.1.67 |
idm |
idm.engwsc.example.com |
Identity Management |
VM Guest |
192.168.1.80 |
gitlab |
gitlab.engwsc.example.com |
GitLab CE |
VM Guest |
192.168.1.81 |
slurm |
slurm.engwsc.example.com |
Slurm Controller |
VM Guest |
192.168.1.82 |
graylog |
graylog.engwsc.example.com |
Graylog Open |
VM Guest |
192.168.1.83 |
ansible |
ansible.engwsc.example.com |
Ansible Control Node |
VM Guest |
192.168.1.84 |
influxdb |
influxdb.engwsc.example.com |
InfluxDB |
VM Guest |
192.168.1.85 |
grafana |
grafana.engwsc.example.com |
Grafana |
VM Guest |
192.168.1.86 |
docker |
docker.engwsc.example.com |
Docker Host |
VM Guest |
192.168.1.87 |
mirror |
mirror.engwsc.example.com |
DNF Repository Mirror |
VM Guest |
192.168.1.88 |
vmg01 |
vmg01.engwsc.example.com |
Legacy OS (Optional) |
VM Guest |
192.168.1.89 |