RedHat systemd configuration
As of DSE version 5.1.19, systemd units are now included for RHEL-based and compatible systems.
The following units are installed in /usr/lib/systemd/system:
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dse.target: starts DSE nodes -
dse-shutdown.target: stops DSE nodes
In addition, a dse@.service template is installed into /usr/share/dse/templates and serves as a template unit for all DSE node instances running on the host OS under the cassandra user.
That template is used by the dse add-node command and the /usr/share/dse/tools/dse-convert-to-systemd helper script.
Once dse.target is enabled, the dse add-node command creates and enables systemd service for new nodes, and also creates init.d scripts to redirect lifecycle commands to systemctl.
By default, systemd units are not enabled.
Old init.d scripts remain in effect.
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On systems that have |
Procedure
To enable DSE systemd units:
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Stop the DSE
init.dservice:sudo service dse stop -
Enable
dse.target:sudo systemctl enable dse.targetAfter
dse.targetis enabled, DSE nodes automatically start as part of the multi-user target on each reboot. -
On each node run:
sudo /usr/share/dse/tools/dse-convert-to-systemd full-node-idThe node address, full-node-id must be the full node ID including the
dse-prefix. The default node ID if no other nodes are configured isdse./usr/share/dse/tools/dse-convert-to-systemd dse-node1The
dse-convert-tosystemdscript makes the following changes:-
Creates and enables
systemdunits for DSE nodes in/etc/systemd/system/. -
Modifies the DSE
init.dscript to redirect lifecycle commands tosystemctl.
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Next steps
DSE systemd operations include:
-
Start all DSE nodes:
systemctl start dse.target -
Stop all DSE nodes:
systemctl start dse-shutdown.target -
Start one DSE node:
systemctl start full-node-id -
Stop one DSE node:
systemctl stop full-node-id
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The default start timeout is 10 minutes and the default stop timeout is 30 seconds. Those values can be adjusted by editing the corresponding unit files. |
