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6.4.5. Additional Region and Zone Tasks

List all available regions with the following command: 
# oo-admin-ctl-region -c list
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Remove region and zone tags from a node with the following command: 
# oo-admin-ctl-district -c unset-region -n district_name -i server_identityoo-admin-ctl-district -c unset-region -n district_name -i server_identityoo-admin-ctl-district -c unset-region -n district_name -i server_identityoo-admin-ctl-district -c unset-region -n district_name -i server_identity
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Remove zones from a region with the following command: 
# oo-admin-ctl-region -c remove-zone -r region_name -z zone_nameoo-admin-ctl-region -c remove-zone -r region_name -z zone_nameoo-admin-ctl-region -c remove-zone -r region_name -z zone_nameoo-admin-ctl-region -c remove-zone -r region_name -z zone_name
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Destroy empty regions with the following command: 
# oo-admin-ctl-region -c destroy -r region_nameoo-admin-ctl-region -c destroy -r region_name
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Procedure 6.10. To Require New Applications Use Zones:

  1. In the /etc/openshift/plugins.d/openshift-origin-msg-broker-mcollective.conf file on the broker host, set the ZONES_REQUIRE_FOR_APP_CREATE parameter to true to require that new applications only use nodes tagged with a zone. When true, gear placement will fail if there are no zones available with the correct gear profile: 
    ZONES_REQUIRE_FOR_APP_CREATE=true
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  2. Restart the broker service: 
    # service openshift-broker restart
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Procedure 6.11. To Enforce the Minimum Number of Zones per Gear Group

  1. In the /etc/openshift/plugins.d/openshift-origin-msg-broker-mcollective.conf file on the broker host, set the ZONES_MIN_PER_GEAR_GROUP parameter to the desired minimum number of zones between which gears in application gear groups are distributed: 
    ZONES_MIN_PER_GEAR_GROUP=number_of_zones
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  2. Restart the broker service: 
    # service openshift-broker restart
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