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improve docu

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Dietmar Maurer 2015-03-27 06:28:50 +01:00
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@ -17,14 +17,17 @@ In future, we want to make HA easier for our users, and it should
be possible to move to newest corosync, or even a totally different be possible to move to newest corosync, or even a totally different
cluster stack. So we want: cluster stack. So we want:
- possible to run with any distributed key/value store which provides - possibility to run with any distributed key/value store which provides
some kind of locking with timeouts (zookeeper, consul, etcd, ..) some kind of locking with timeouts (zookeeper, consul, etcd, ..)
- self fencing using Linux watchdog device - self fencing using Linux watchdog device
- implemented in Perl, so that we can use PVE framework - implemented in Perl, so that we can use PVE framework
- only works with simply resources like VMs - only work with simply resources like VMs
We dropped the idea to assemble complex, dependend services, because we think
this is already done with the VM abstraction.
= Architecture = = Architecture =
@ -107,12 +110,14 @@ started: Service is active an LRM should start it asap.
fence: Wait for node fencing (service node is not inside fence: Wait for node fencing (service node is not inside
quorate cluster partition). quorate cluster partition).
freeze: Do not touch. We use this state while we reboot a node,
or when we restart the LRM daemon.
migrate: Migrate (live) service to other node. migrate: Migrate (live) service to other node.
error: Service disabled because of LRM errors. error: Service disabled because of LRM errors.
== Local Resource Manager (class PVE::HA::LRM) == == Local Resource Manager (class PVE::HA::LRM) ==
The Local Resource Manager (LRM) daemon runs one each node, and The Local Resource Manager (LRM) daemon runs one each node, and