Configure Hadoop for Multiple Pepperdata Versions (RPM/DEB)
If there is more than one version of Supervisor on a host, Supervisor uses Linux alternatives to control which version is active on a given cluster at a given time.
Pepperdata requires that the same version of Supervisor be active on all hosts in a given cluster.
Partial upgrades are not supported except temporarily, during rolling upgrades.
By default, Linux alternatives selects the latest version of Supervisor/PepCollector that is installed on a given host to be the active version that Hadoop uses. You can change which version to use, as described in the table.
alternatives command as the root user.| Result | Alternatives Command |
|---|---|
| Force version X.Y.Z to be the active version of the Pepperdata Supervisor (including PepAgents and monitored services). | /opt/pepperdata/supervisor-X.Y.Z/alternatives/set-current-agents |
| Force the currently active version to remain the active version of the Pepperdata Supervisor (including PepAgents and monitored services). | /opt/pepperdata/supervisor/alternatives/set-current-agents |
| Revert to default behavior where the newest version of the Pepperdata Supervisor agents are active. | /opt/pepperdata/supervisor-X.Y.Z/alternatives/use-latest-agents |
| Force version X.Y.Z to be the active version of the PepCollector. | /opt/pepperdata/collector-X.Y.Z/alternatives/set-current-collectd |
| Force the current active version to remain the active version of the PepCollector. | /opt/pepperdata/collector/alternatives/set-current-collectd |
| Revert to default behavior where the newest version of the PepCollector is active. | /opt/pepperdata/collector-X.Y.Z/alternatives/use-latest-collectd |
You can have a newer active PepCollector version than the active Supervisor version, but not the opposite. To run with different PepCollector and Supervisor versions, contact Pepperdata Support.