* Eliminate single point of failure (redundant components)
** use an uninterruptible power supply (UPS)
-** use redundant power supplies on the main boards
+** use redundant power supplies in your servers
** use ECC-RAM
** use redundant network hardware
** use RAID for local storage
This section provides a short overview of common management tasks. The
first step is to enable HA for a resource. This is done by adding the
resource to the HA resource configuration. You can do this using the
-GUI, or simply use the command line tool, for example:
+GUI, or simply use the command-line tool, for example:
----
# ha-manager add vm:100
The CRM uses a service state enumeration to record the current service
state. This state is displayed on the GUI and can be queried using
-the `ha-manager` command line tool:
+the `ha-manager` command-line tool:
----
# ha-manager status
-------------
The HA stack is well integrated into the {pve} API. So, for example,
-HA can be configured via the `ha-manager` command line interface, or
+HA can be configured via the `ha-manager` command-line interface, or
the {pve} web interface - both interfaces provide an easy way to
manage HA. Automation tools can use the API directly.
[thumbnail="screenshot/gui-ha-manager-add-resource.png"]
-The above config was generated using the `ha-manager` command line tool:
+The above config was generated using the `ha-manager` command-line tool:
----
# ha-manager add vm:501 --state started --max_relocate 2