Prepare hosts
To manage a cluster and its nodes via ADCM, it is necessary to prepare hosts for a cluster and link these hosts to ADCM. This is the function of ADCM hostproviders — special plugins for ADCM, which encapsulate the complex mechanism of interaction between ADCM and the hosts controlled by it.
ADCM supports several types of hostproviders. For more information on how to configure hostproviders and use them to create hosts, refer to the following documentation:
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IMPORTANT
It is forbidden to use the reserved words adpg, balancer, chrony, etcd, and prometheus_monitoring as hostnames in an ADP cluster.
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Make sure that routing tables on each host contain the default route — 0.0.0.0/0.
Use the route command to check this:
$ routeThe output should be similar to:
Destination Gateway Genmask Flags Metric Ref Use Iface default gateway 0.0.0.0 UG 100 0 0 eth0 10.92.40.0 0.0.0.0 255.255.252.0 U 100 0 0 eth0
If the 0.0.0.0/0 default route is missing in the output, add it using the following command:
$ sudo route add default gw 0.0.0.0 eth0