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6.3.6. Removing Nodes from Districts
If many gears on a node host become idle over time, you can compact the district by decommissioning or re-purposing the node host. Use the
oo-admin-ctl-district and oo-admin-move commands in combination to remove the gears from the node host, and then remove the host from its district.
Procedure 6.4. To Remove Nodes from Districts:
The following steps demonstrate an example situation where district
small_district has two node hosts, node1.example.com and node2.example.com. The second node host, node2.example.com, has a high number of idle gears.
- Run the following commands and fix any problems that are found. This prevents future problems caused by moving a broken gear. On the broker host, run:
#
oo-admin-chkOn the node hosts, run:#
oo-accept-node - Deactivate the node you want to remove to prevent applications from being created on or moved to the node. Existing gears continue running. On the broker host, run:
#
oo-admin-ctl-district -c deactivate-node -n small_district -i node2.example.com - Move all the gears from
node2.example.comtonode1.example.comby repeating the following command on the broker host for each gear onnode2.example.com:#
oo-admin-move --gear_uuid UUID -i node1.example.com - Remove
node2.example.comfrom the district:#
oo-admin-ctl-district -c remove-node -n small_district -i node2.example.com
