ColdAisle is modern DCIM for the whole floor — cabinets, 3D racks, power, cooling, cabling raceways, SNMP, work orders, and IPAM with aligned indexes for multi-homed WAN. The application runs on Windows (IIS + PHP + SQL Server), with local / LDAPS / Entra ID auth and one-click updates from GitHub.
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Free and open source (MIT). Self-hosted on your servers — your inventory never leaves your facility. This site does not host the app.
From install to first rack
After setup.php creates the database and the first admin, ColdAisle does not
drop you on an empty dashboard. A short setup wizard gets the hall and optional
services in place. A site tour then points at the live UI — sidebar, floor planner,
power, cabling, SNMP — with flags you can exit or restart anytime.
DCIM is useless until someone knows where to click. ColdAisle puts the wizard and the tour on the real floor — then gets out of the way.
UI language from the floor: cabinets, U-space, PDUs, raceways, SNMP, NOC wall.
NOC wall
1080p layout: 3D stage, live PDU/UPS tiles, and a 2×3 alert grid. Auto-rotate, raceways, live/stale footer so a frozen screen is obvious from across the room.
3D hall
Same floor plan as the 2D canvas, in Three.js: cabinets, yellow fiber U-channel, ladder, CRAC, and sensor spheres. Orbit the room before you walk it.
Cooling
CRAC and CRAH as first-class infrastructure: footprints, facing, active vs standby. Particle streams from supply to the cabinet front, through the rack, and out to return. When units are polling, the path is a temperature rainbow. Same 3D hall and NOC wall as power.
On-premise by design
Cabinet layouts, power paths, SNMP credentials, and who sits in which U are operational secrets. ColdAisle is built for a self-contained install you run — not a multi-tenant SaaS that holds your floor on another company’s servers.
IIS + SQL Server in your rack or your VM. Backups, auth, and SNMP secrets stay inside your perimeter.
MIT, public GitHub. You can read what the code does with your data. No black-box appliance, no “trust our cloud.”
Written by a network infrastructure administrator who runs floors for a living — not a generic SaaS backlog.
Coming from openDCIM?
Import a live openDCIM API (or offline JSON dumps) into ColdAisle. Mode A merges into the data center you already laid out and never overwrites cabinet floor positions. Test connection, preview a dry-run, then run: data ports, CDUs / power maps, cabinet audits, and template images come across with the inventory.
IPAM
Address plan and subnet plan in the same DCIM — not Infoblox, not a DHCP server. Put two or more prefixes in an aligned group. Name index 10 once and every member gets that host: 10.10.0.10, 10.10.1.10, 10.10.2.10. Multi-homed WAN and LAN + iDRAC stay obvious.
Linux, network, and mixed floors are the point. You host ColdAisle on IIS + SQL Server — you do not have to run a Windows-only site.
The application stack. Express is fine. A browser wizard creates the database, schema, and first admin.
Racks, power, cooling, raceways, IPAM, SNMP, work orders, audits — not just Windows servers in the cabinets.
Active Directory nested groups and Microsoft Entra OIDC SSO alongside local accounts.
PowerShell installer, then a browser wizard for SQL and the first admin. After you sign in, a guided setup walks org, optional directory and mail, and the hall dimensions. A flag tour on the live UI shows where cabinets, power, and raceways actually live. Self-hosted. MIT. Updates from GitHub.
Drag-and-drop cabinets and row PDUs. Toggle 2D plan and interactive Three.js racks.
A/B zones, panels, multi-phase PDUs, outlet inventory, history charts, near/overload alerts.
CRAC/CRAH on the plan. Live SNMP, heat spheres, and particle airflow you can see — not a bolt-on BMS dashboard.
Ladder, fiber U-channel, trough, conduit. Multi-hop paths and shortest-path calculation.
Address plan and subnet plan in the same DCIM. Aligned indexes for multi-homed WAN — assign a site once, same last octet on every prefix.
v2c/v3, encrypted secrets, MIB upload, Discover, OID templates, scheduled poll worker.
Live API or JSON dumps. Preview first. Mode A keeps the floor plan you already placed.
Operators
Halls, imports, what you click every week, what is still a spreadsheet. Operator notes beat a feature survey.
