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Thank you very much Dlardo. problem was exatly same and solution was same. when you create volume if it stucks as "Creating" then on block node do tail -f /var/log/cinder/cinder-volume.log if you see error ERROR oslo.messaging._drivers.common Exception during message handling: create_volume() got an unexpected keyword argument 'source_replicaid' or errors somelike problem related with cinder versions. in controller it is 2.1 and in block it is 1.3

because it is documentation problem. because when we start adding openstack packages on controller node we add repo like : apt-get install ubuntu-cloud-keyring echo "deb http://ubuntu-cloud.archive.canonical.com/ubuntu" "trusty-updates/juno main" > /etc/apt/sources.list.d/cloudarchive-juno.list

but we dont it on block node so it installs old version of cinder. that is why we get python errors. So adding repo and resintalling cinder volume on block node solves problem.

Hope it will be helpful. Thanks for Dlardo...