Add components
In ADCM a component means a part of a service that should be deployed on one or several cluster hosts.
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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 typical scheme of components distribution for ADQM clusters is described in the table below.
ADQM components distribution Host Service Component Notes Any host
ADQMDB
Clickhouse Server
One or more components should be installed
All hosts
ADQMDB
Clickhouse JDBC Bridge
If you install this component (optionally), add it to all hosts in the cluster where the Clickhouse Server component is installed
Any host
Zookeeper
Zookeeper Server
One or more components should be installed. Total amount should be odd
Any host
Chproxy
Chproxy Proxy Server
One or more components should be installed
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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