Add components

In ADCM a component means a part of a service that should be deployed on one or several cluster hosts.

IMPORTANT
Initially, there are no components on any of cluster hosts. You should map components to hosts manually.

The steps for adding components to hosts are listed below:

  1. Select a cluster on the Clusters page. To do this, click a cluster name in the Name column.

    Select a cluster
    Select a cluster
  2. Open the Mapping tab on the cluster page.

    Switch to mapping service components
    Switch to mapping service components
  3. 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 component
    Select hosts for a component
    Mandatory 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 components
    Mandatory components

    Currently, ADPG and NTP Master components are mandatory and should be placed on one host.

    CAUTION
    Without assigning a necessary number of hosts to mandatory components, the component mapping cannot be saved.

    An example of components distribution for the ADPG Enterprise Edition is shown in the table below.

    ADPG components distribution
    Host Service Component Notes

    Host 1

    ADPG

    ADPG

    Can be a leader or replica in the HA architecture

    Chrony

    NTP Master

     — 

    Host 2

    ADPG

    ADPG

    Can be a leader or replica in the HA architecture

    Chrony

    NTP Secondary

     — 

    Host 3

    ADPG

    ADPG

    Can be a leader or replica in the HA architecture

    Chrony

    NTP Secondary

     — 

    Host 4

    Etcd

    Etcd

    You must use an odd number of nodes for the Etcd component. Three or more nodes are recommended

    Chrony

    NTP Slave

     — 

    Host 5

    Etcd

    Etcd

    You must use an odd number of nodes for the Etcd component. Three or more nodes are recommended

    Chrony

    NTP Slave

     — 

    Host 6

    Etcd

    Etcd

    You must use an odd number of nodes for the Etcd component. Three or more nodes are recommended

    Chrony

    NTP Slave

     — 

    Host 7

    Balancer

    HAProxy

     — 

  4. After component distribution is completed, click Save.

    Save mapping of components
    Save mapping of components
  5. To open an alternative mapping view (by hosts), select the Hosts view tab.

    View mapping by hosts
    View mapping by hosts
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