**hinfo**
cluster information printer
+**hroller**
+ cluster rolling maintenance scheduler
DESCRIPTION
-----------
-
``htools`` is a suite of tools designed to help with allocation/movement
of instances and balancing of Ganeti clusters. ``htools`` is also the
generic binary that must be symlinked or hardlinked under each tool's
Installed as ``hinfo``, it prints information about the current cluster
state.
+Installed as ``hroller``, it helps scheduling maintenances that require
+node reboots on a cluster.
+
COMMON OPTIONS
--------------
Backend specification: the name of the file holding node and instance
information (if not collecting via RAPI or LUXI). This or one of the
other backends must be selected. The option is described in the man
- page **htools**(1).
+ page **htools**\(1).
- The file should contain text data, line-based, with two empty lines
+ The file should contain text data, line-based, with single empty lines
separating sections. The lines themselves are column-based, with the
pipe symbol (``|``) acting as separator.
- The first section contains group data, with two columns:
+ The first section contains group data, with the following columns:
- group name
- group uuid
+ - allocation policy
+ - tags (separated by comma)
The second sections contains node data, with the following columns:
- node name
- node total memory
+ - memory used by the node
- node free memory
- node total disk
- node free disk
- node physical cores
- - offline field (as ``Y`` or ``N``)
+ - offline/role field (``Y`` for offline nodes, ``N`` for online non-master
+ nodes, and ``M`` for the master node which is always online)
- group UUID
- node spindle count
- instance disk size
- instance vcpus
- instance status (in Ganeti's format, e.g. ``running`` or ``ERROR_down``)
- - instance ``auto_balance`` flag (see man page **gnt-instance** (7))
+ - instance ``auto_balance`` flag (see man page **gnt-instance**\(8))
- instance primary node
- instance secondary node(s), if any
- instance disk type (e.g. ``plain`` or ``drbd``)
- cpu count
- disk size
- disk count
- - nic count
+ - NIC count
- disk templates
- vcpu ratio
- spindle ratio
matter).
More details about the difference between the SI and binary systems can
-be read in the *units(7)* man page.
+be read in the **units**\(7) man page.
ENVIRONMENT
-----------