Heartbeat plus ldirectord - Revision history

Wensong at 12:24, 16 November 2006

2006-11-16T12:24:46Z

Wensong at 14:33, 1 August 2006

2006-08-01T14:33:55Z

Wensong at 16:04, 18 June 2006

2006-06-18T16:04:07Z

Wensong: /* Introduction */

2006-02-05T13:29:01Z

‎Introduction

Wensong at 02:12, 7 August 2005

2005-08-07T02:12:53Z

New page

== Introduction ==

ldirectord ldirectord is a daemon to monitor and administer real servers in a [[LVS]] cluster of load balanced virtual servers. ldirectord typically used as a resource for heartbeat , but can also be run from the command line.

A LVS cluster consists or one or more virtual services each of which may have zero or more real servers. The IP address of a virtual service is what end-users connect to and is typically advertised over DNS. When a connection is made to a virtual service, it is allocated a real server, and all packets for this connection are forwarded to this real server. A more detailed overview of LVS can be found here.

ldirectord has a configuration file which specifies the virtual services and their associated real servers. When ldirectord is initialised it creates the virtual services for the clutster.

ldirectord monitors the health of the real servers by periodically requesting a known URL and checking that the response contains an expected response. If a real server fails then the server is removed and will be reactivated once it comes back on line. If all the real servers are down then a fall-back server is inserted into the pool, which will made quiescent one of the real web servers comes back on line. Typically, the fall-back server is localhost. If an HTTP virtual service is being provided then it is useful to run an Apache HTTP server that returns a page indicating that the service is temporarily inaccessible.

== External Links ==

* http://www.vergenet.net/linux/ldirectord/
* http://www.linux-ha.org/

[[Category:Cluster Management]]

@@ Line 3: / Line 3: @@
 ldirectord ldirectord is a daemon to monitor and administer [[real server]]s in a [[LVS]] cluster of load balanced virtual servers. ldirectord typically used as a resource for [[heartbeat]], but can also be run from the command line.
-A LVS cluster consists or one or more virtual services each of which may have zero or more real servers. The IP address of a virtual service is what end-users connect to and is typically advertised over DNS. When a connection is made to a virtual service, it is allocated a real server, and all packets for this connection are forwarded to this [[real server]]. A more detailed overview of LVS can be found here.
+A [[LVS]] cluster consists or one or more virtual services each of which may have zero or more real servers. The IP address of a virtual service is what end-users connect to and is typically advertised over DNS. When a connection is made to a virtual service, it is allocated a real server, and all packets for this connection are forwarded to this [[real server]]. A more detailed overview of [[LVS]] can be found here.
-ldirectord has a configuration file which specifies the virtual services and their associated real servers. When ldirectord is initialised it creates the virtual services for the clutster.
+ldirectord has a configuration file which specifies the virtual services and their associated real servers. When ldirectord is initialized it creates the virtual services for the cluster.
 ldirectord monitors the health of the real servers by periodically requesting a known URL and checking that the response contains an expected response. If a [[real server]] fails then the server is removed and will be reactivated once it comes back on line. If all the real servers are down then a fall-back server is inserted into the pool, which will made quiescent one of the real web servers comes back on line. Typically, the fall-back server is localhost. If an HTTP virtual service is being provided then it is useful to run an Apache HTTP server that returns a page indicating that the service is temporarily inaccessible.
@@ Line 12: / Line 12: @@
 == External Links ==
 * http://www.vergenet.net/linux/ldirectord/
 * http://www.linux-ha.org/

@@ Line 1: / Line 1: @@
 == Introduction ==
-ldirectord ldirectord is a daemon to monitor and administer real servers in a [[LVS]] cluster of load balanced virtual servers. ldirectord typically used as a resource for heartbeat , but can also be run from the command line.
+ldirectord ldirectord is a daemon to monitor and administer real servers in a [[LVS]] cluster of load balanced virtual servers. ldirectord typically used as a resource for [[heartbeat]], but can also be run from the command line.
 A LVS cluster consists or one or more virtual services each of which may have zero or more real servers. The IP address of a virtual service is what end-users connect to and is typically advertised over DNS. When a connection is made to a virtual service, it is allocated a real server, and all packets for this connection are forwarded to this real server. A more detailed overview of LVS can be found here.
@@ Line 7: / Line 7: @@
 ldirectord has a configuration file which specifies the virtual services and their associated real servers. When ldirectord is initialised it creates the virtual services for the clutster.
 ldirectord monitors the health of the real servers by periodically requesting a known URL and checking that the response contains an expected response. If a real server fails then the server is removed and will be reactivated once it comes back on line. If all the real servers are down then a fall-back server is inserted into the pool, which will made quiescent one of the real web servers comes back on line. Typically, the fall-back server is localhost. If an HTTP virtual service is being provided then it is useful to run an Apache HTTP server that returns a page indicating that the service is temporarily inaccessible.
-−
 == External Links ==