doc/hardware-requirements.md

@@ -31,10 +31,10 @@ below.
  * Production quality rather than pre-production hardware
  * Support for multiple drives (so we can do RAID) although this can
    be waived for disposable servers like build boxes
- * Hosting for the machine: we do not run our own data centers or rack,
-   so it would be preferable if you can also find a hosting location
-   for the machine, ideally dual-stack (IPv4 and IPv6) and gigabit or
-   greater
+ * Hosting for the machine: we do not run our own data centers or
+   rack, so it would be preferable if you can also find a hosting
+   location for the machine, see the [hosting requirements](#hosting-requirements) below
+   for details
 
 ## To avoid
 
@@ -42,6 +42,30 @@ below.
  * hardware RAID, unless supported with open drivers in the mainline
    Linux kernel and userland utilities
 
+# Hosting requirements
+
+Those are requirements that apply to actual physical / virtual hosting
+of machines.
+
+## Must have
+
+ * 100-400W per unit density, depending on workload
+ * 1-10gbit, unmetered
+ * dual stack (IPv4 and IPv6)
+ * IPv4 address space (at least one per unit, typically 4-8 per unit)
+ * out of band access (IPMI or serial)
+ * rescue systems (e.g. PXE booting)
+ * remote hands SLA ("how long to replace a broken hard drive?")
+
+## Nice to have
+
+ * "clean" IP addresses (for mail delivery, etc)
+ * complete /24 IPv4, donated to the Tor project
+ * private VLANs with local network
+ * BGP announcement capabilities
+ * not in europe or northern america
+ * free, or ~ 150$/unit
+
 # Virtual machines requirements
 
 ## Must have