Add components
In ADCM a component means a part of a service that should be deployed on one or several cluster hosts. For example, NiFi service can consist of such components as NiFi Server, NiFi Registry.
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IMPORTANT
Initially, there are no components on any of cluster hosts. You should map components to hosts manually.
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The steps for adding components to hosts are listed below:
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Select a cluster on the Clusters page. To do this, click a cluster name in the Name column.
Select a cluster -
Open the Mapping tab on the cluster page.
Switch to mapping service components -
In the window that opens, map components to hosts. To assign hosts for each component, click Add hosts and select hosts in the pop-up window.
Select hosts for a componentMandatory and optional components
Each service can have mandatory and optional components. Mandatory components are highlighted in red. The ADCM UI also displays how many mandatory components should be installed.
Mandatory and optional componentsCAUTIONWithout assigning a necessary number of hosts to mandatory components, the component mapping cannot be saved.The examples of distribution components in ADS clusters consisting of 3 and 5 hosts are described in the table below.
Examples of components distributionHost Service Component Host 1
Zookeeper
Zookeeper server
Kafka
Kafka Broker
Kafka REST Proxy
Kafka REST Proxy
Schema-Registry
Schema-Registry
Host 2
Zookeeper
Zookeeper Server
ksqlDB
ksqlDB Client
ksqlDB Server
Kafka
Kafka Broker
NiFi
NiFi Server
Host 3
Zookeeper
Zookeeper Server
Kafka
Kafka Broker
Kafka Connect
Kafka Connect Worker
NiFi
NiFi Server
NiFi Registry
MiNiFi
MiNiFi C2 Server
MiNiFi Agent
Host Service Component Host 1
Zookeeper
Zookeeper Server
Kafka
Kafka Broker
Schema-Registry
Schema-Registry
Host 2
Zookeeper
Zookeeper Server
Kafka
Kafka Broker
Host 3
Zookeeper
Zookeeper Server
ksqlDB
ksqlDB Client
ksqlDB Server
Kafka REST Proxy
Kafka REST Proxy
Host 4
Kafka
Kafka Broker
NiFi
NiFi Server
NiFi Registry
Host 5
NiFi
NiFi Server
MiNiFi
MiNiFi C2 Server
MiNiFi Agent
Kafka Connect
Kafka Connect Worker
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After component distribution is completed, click Save.
Save mapping of components
Starting with ADCM 2.2.0, you can use another mapping mode — by hosts. To do this, switch on the Hosts mode toggle and map components to hosts by clicking Add components for each host sequentially.
