Had followed steps given in https://docs.openstack.org – Content mostly from openstack.org – This is just a compilation on steps followed by me. Minor changes may be observed as I had installed on Debian 9.6.
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The Identity service authentication mechanism for services uses Memcached to cache tokens. The memcached service typically runs on the controller node.
root@controller:~# apt install memcached python-memcache
/etc/memcached.conf file and configure the service to use the management IP address of the controller node. This is to enable access by other nodes via the management network:
# Specify which IP address to listen on. The default is to listen on all IP addresses # This parameter is one of the only security measures that memcached has, so make sure # it's listening on a firewalled interface. -l 10.0.0.18
Note : Default configuration would be -l 127.0.0.1 – change it.
Restart memcached service
root@controller:~# service memcached restart root@controller:~#