stop`, which sets the requested state to `stopped`.
NOTE: The HA stack works fully asynchronous and needs to communicate
-with other cluster members. So it takes some seconds unless you see
+with other cluster members. So it takes some seconds until you see
the result of such actions.
To view the current HA resource configuration use:
[NOTE]
Locks are provided by our distributed configuration file system (pmxcfs).
They are used to guarantee that each LRM is active once and working. As a
-LRM only executes actions when it holds its lock we can mark a failed node
+LRM only executes actions when it holds its lock, we can mark a failed node
as fenced if we can acquire its lock. This lets us then recover any failed
HA services securely without any interference from the now unknown failed node.
This all gets supervised by the CRM which holds currently the manager master
node, or when we restart the LRM daemon
(see xref:ha_manager_package_updates[Package Updates]).
+ignored::
+
+Act as if the service were not managed by HA at all.
+Useful, when full control over the service is desired temporarily,
+without removing it from the HA configuration.
+
+
migrate::
Migrate service (live) to other node.
include::ha-resources-opts.adoc[]
Here is a real world example with one VM and one container. As you see,
-the syntax of those files is really simple, so it is even posiible to
+the syntax of those files is really simple, so it is even possible to
read or edit those files using your favorite editor:
.Configuration Example (`/etc/pve/ha/resources.cfg`)
[thumbnail="gui-ha-manager-add-group.png"]
-A commom requirement is that a resource should run on a specific
+A common requirement is that a resource should run on a specific
node. Usually the resource is able to run on other nodes, so you can define
an unrestricted group with a single member:
For bigger clusters, it makes sense to define a more detailed failover
behavior. For example, you may want to run a set of services on
`node1` if possible. If `node1` is not available, you want to run them
-equally splitted on `node2` and `node3`. If those nodes also fail the
+equally split on `node2` and `node3`. If those nodes also fail the
services should run on `node4`. To achieve this you could set the node
list to:
The `nofailback` options is mostly useful to avoid unwanted resource
-movements during administartion tasks. For example, if you need to
+movements during administration tasks. For example, if you need to
migrate a service to a node which hasn't the highest priority in the
group, you need to tell the HA manager to not move this service
instantly back by setting the `nofailback` option.
the LRM makes a request to the CRM to freeze all its services. This prevents
that they get touched by the Cluster during the short time the LRM is restarting.
After that the LRM may safely close the watchdog during a restart.
-Such a restart happens on a update and as already stated a active master
-CRM is needed to acknowledge the requests from the LRM, if this is not the case
-the update process can be too long which, in the worst case, may result in
-a watchdog reset.
+Such a restart happens normally during a package update and, as already stated,
+an active master CRM is needed to acknowledge the requests from the LRM. If
+this is not the case the update process can take too long which, in the worst
+case, may result in a reset triggered by the watchdog.
Node Maintenance
The LRM tells the CRM that it wants to restart, and waits until the
CRM puts all resources into the `freeze` state (same mechanism is used
-for xref:ha_manager_package_updates[Pakage Updates]). This prevents
+for xref:ha_manager_package_updates[Package Updates]). This prevents
that those resources are moved to other nodes. Instead, the CRM start
the resources after the reboot on the same node.
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