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ChameleonCloud / chi-in-a-box

Packaging the systems and operations of the Chameleon testbed
Apache License 2.0
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IPMI network configuration clarification #155

Open timbargo opened 2 years ago

timbargo commented 2 years ago

What does chi-in-a-box expect for an IPMI configuration? Does the controller node provide DHCP for IPMI addresses? Should you set IPMI addresses to match ironic_provisioning subnet in site-config/defaults.yml? (The answer here is no)

I originally asked this question in Slack. Opening a Github issue at Mark's request and pasting his original Slack response to the question for the issue record.

it doesn’t provide DHCP by default for the IPMI addresses. We’ve been habitually setting them to static IPs, but you could run a dhcp server instead
all we assume is routed access to whatever addresses they have, it actually shouldn’t be the ironic_provisioning subnet, which is instead used to boot the nodes onto while loading an image
simplest would likely be to put the IPMI interfaces on a separate switch/vlan/network, and give them a dedicated subnet, and then put some address in that subnet on the controller node
the goal being that we want those interfaces to work, even if the entire set of openstack services is down. Just a safeguard against circular dependencies
msherman64 commented 2 years ago

This has been somewhat addressed, in that installation will now succeed, even if a value is not provided. However, better docs are still needed.

ironic_dnsmasq_dhcp_range is only used for ironic_inspector, not normal usage, and we set a default in https://github.com/ChameleonCloud/chi-in-a-box/commit/40ec7b3bb9b026b0197a6952aa54d1bba6662fe5

The ironic provisioning network now defaults to 10.51.0.0/24, but can be customized. New defaults were set in https://github.com/ChameleonCloud/chi-in-a-box/commit/ef4d2fc7e23cacb11dc60619e12579ea7c99a170#diff-6fee6f934c49cf2e47394ce307eee4aba6d894e9b7f5bdc1fbf5eae345c59f9d