Migration Of Existing Installations; Configuration Of The Cluster; 1Network Configuration - CheckMK Rail2 Mark I Manual

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12.2 Migration of existing installations

Devices that were delivered and initialised with the ﬁrmware version 1.1.0 or higher can be clustered

without migration.

Devices initialised with earlier ﬁrmware must ﬁrst be updated to version 1.1.0 or higher. The factory

settings of the device need to then be restored, preparing the device for clustering. Please note that, in

order to prevent data loss, you must back up your data from the device and then restore it.

12.3 Conﬁguration of the cluster

This guide assumes that you have already

pre-conﬁgured

both devices to the extent where the web

interface can be opened with a web browser.

Before actually setting up the cluster, you must ﬁrst prepare both devices. This mainly involves adapting

the network conﬁguration to fulﬁl clustering requirements (see prerequisites).

The conﬁguration of a cluster with two Check_MK rack1 is shown in the following. A cluster is built

which looks as shown in the diagram below.

The interface designations LAN1, LAN2 etc. used in the diagram correspond to the designations of the

physical interfaces on the device. In the operating system, LAN1 corresponds to the device eth0, LAN2

to the device eth1 etc.

This conﬁguration complies with the recommendations for the clustering of two Check_MK rack1. You

can of course use IP addresses in your environment that suit it. Make sure however that the internal

cluster network (bond1 in the diagram) uses a diﬀerent IP network to the "external" network (bond0 in

the diagram).

12.3.1 Network conﬁguration

Open the web interface of the ﬁrst node, select

Device settings

and Network settings at the top. You

will now be on the network settings conﬁguration page. There are two modes available to you here. The

Basic mode, which you can only use to conﬁgure your device's LAN1, is activated by default.

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