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 — the distribution of components between hosts should be performed manually.
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The steps of adding components to hosts are listed below:
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From the CLUSTERS tab switch to the cluster configuring. To do this, click the row that contains the added cluster or click the icon in the Config column. Both methods open the cluster menu.
Switching to cluster configuring -
Open the Hosts - Components tab in the cluster menu.
NOTEThe orange exclamation mark near the Hosts - Components menu item is displayed when the components distribution is needed.
Switching to services components distribution -
In the opened window, distribute all necessary components between cluster hosts. To distribute components, use one of the ways:
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Select a component in the Components column (by clicking at it) and then define all hosts for it in the Hosts column (by alternate clicking at each host).
Choosing hosts for a component -
Select a host in the Hosts column (by clicking at it) and define all components for it in the Components column (by alternate clicking at each component).
Choosing components for a host
Mandatory and optional components
Each service can have mandatory and optional components:-
If the component is optional, it has a simple quantitative counter located to the right of its name — without the
/symbol. This counter displays the number of hosts that is assigned to the current component.
Optional components -
If the component is mandatory, its quantitative counter contains the
/symbol. The first digit in the counter (displayed before/) shows the current number of assigned hosts, and the second digit (displayed after/) — the minimal required number of hosts.
Mandatory componentsCAUTIONWithout assigning necessary count of hosts to mandatory components, the service distribution map 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-Manager
Kafka-Manager
Kafka REST Proxy
Kafka REST Proxy
Schema-Registry
Schema-Registry
Host 2
Zookeeper
Zookeeper Server
KSQL
KSQL Server
KSQL Client
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
Kafka-Manager
Kafka-Manager
Schema-Registry
Schema-Registry
Host 2
Zookeeper
Zookeeper Server
Kafka
Kafka Broker
Host 3
Zookeeper
Zookeeper Server
KSQL
KSQL Server
KSQL Client
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 components distribution is completed, click Save.
Saving components distribution -
As a result, the orange exclamation mark near the menu item Hosts - Components stops being displayed.
The result of successful components distribution