openstack-manuals/doc/install-guide/source/environment-memcached.rst

Memcached

The Identity service authentication mechanism for services uses Memcached to cache tokens. The memcached service typically runs on the controller node. For production deployments, we recommend enabling a combination of firewalling, authentication, and encryption to secure it.

Install and configure components

1. Install the packages:

   ubuntu or debian

   # apt install memcached python-memcache

   rdo

   # yum install memcached python-memcached

   obs

   # zypper install memcached python-python-memcached

ubuntu or debian

2. Edit the /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:

   -l 10.0.0.11

   Note

   Change the existing line that had -l 127.0.0.1.

rdo

2. Edit the /etc/sysconfig/memcached file and complete the following actions:

   • 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:

     OPTIONS="-l 127.0.0.1,::1,controller"

     Note

     Change the existing line OPTIONS="-l 127.0.0.1,::1".

obs

2. Edit the /etc/sysconfig/memcached file and complete the following actions:

   • 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:

     MEMCACHED_PARAMS="-l 127.0.0.1"

     Note

     Change the existing line MEMCACHED_PARAMS="-l 127.0.0.1,::1".

Finalize installation

ubuntu or debian

• Restart the Memcached service:

  # service memcached restart

rdo or obs

• Start the Memcached service and configure it to start when the system boots:

  # systemctl enable memcached.service
  # systemctl start memcached.service