Cluster actions

Olga Semme

This article describes the main actions available in the ADCM interface for working with an ADS Control cluster.

Actions with the cluster are performed on the Clusters page.

Clusters page

Refer to ADCM documentation for an overview of the Clusters page and common actions.

The set of available actions depends on the cluster state:

For new cluster (cluster state created) the Install action is available, which installs the cluster service.
After cluster installation (cluster state installed) the following actions are available:
- Check — checks the health of the cluster.
- Restart — stops and then starts the cluster.
- Start — starts the cluster services.
- Stop — stops cluster services.
- Manage Kerberos — allows you to enable, reconfigure, and disable Kerberos authentication.
  A description of how to enable and disable Kerberos for ADS Control, and all prerequisites for working with different Kerberos options, correspond to the descriptions of working with Kerberos in ADS:
  
  Existing MIT KDC
  
  Existing Active Directory
  
  Every option of the Manage Kerberos action can be combined with the Custom kerberization settings option.
  
  If Kerberos in ADS Control and ADS is configured with the participation of different key distribution centers (KDCs), for the two clusters to interact correctly, it is necessary to configure mutual trust between the KDCs.
  
  After enabling Kerberos on ADS Control in the user interface, access to those ADS clusters on which Kerberos has already been configured appears. Before Kerberos is enabled on ADS Control, ADS clusters with authentication enabled are displayed in the interface in the offline status.
  Manage Kerberos options
- Manage SSL — allows you to enable, reconfigure, and disable channel security via SSL protocol.
  
  A description of how to enable and disable SSL channel security for ADS Control, and all prerequisites for working with the SSL protocol, correspond to the description of working with SSL in ADS, and ADS Control host certificates must trust the certificates of ADS hosts, that is, the truststore of each host in one cluster must contain the certificate *.crt of each host in the other cluster.
  
  Disable and re-enable SSL on a cluster using the Manage SSL action, if SSL on ADS was enabled later than on ADS Control.
  
  After enabling SSL on ADS Control in user interface, access to those ADS clusters on which SSL has already been configured appears. Before enabling SSL on ADS Control, already protected ADS clusters are displayed in the interface in the offline status.
- Reinstall status-checker — initiates reconfiguration and restart of statuschecker for all cluster services. Used when migrating a cluster under the control of a new ADCM server.
For a cluster prepared for upgrade (the cluster state is upgrade from X.X.X), the Upgrade action is available, which upgrades the cluster version.

To update the cluster version:

Download ADS Control bundle new version — see step Upload a cluster bundle to ADCM in the Create a cluster article.
Open the Clusters page. After downloading the bundle, the icon becomes active.
Click on the icon . In the Upgrade Cluster window that opens, select the version available for upgrade and click Upgrade.

Start upgrade
In the dialog box that opens, click Run.

Confirmation of preparation for update

As a result, the status in the State column changes to upgrade from XXX (depending on the cluster version) — the cluster is ready for upgrade.
Click the icon in the Actions column and run the Upgrade action.

Performing an update

In the dialog box that opens, click Run to confirm the update. Once the upgrade process is complete, ADCM will change the cluster status to installed.

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