Etcd for Ubuntu¶
OpenStack services may use Etcd, a distributed reliable key-value store for distributed key locking, storing configuration, keeping track of service live-ness and other scenarios.
The etcd service runs on the controller node.
Install and configure components¶
Install the
etcd
package:# apt install etcd
Note
As of Ubuntu 18.04, the
etcd
package is no longer available from the default repository. To install successfully, enable theUniverse
repository on Ubuntu.Edit the
/etc/default/etcd
file and set theETCD_INITIAL_CLUSTER
,ETCD_INITIAL_ADVERTISE_PEER_URLS
,ETCD_ADVERTISE_CLIENT_URLS
,ETCD_LISTEN_CLIENT_URLS
to the management IP address of the controller node to enable access by other nodes via the management network:ETCD_NAME="controller" ETCD_DATA_DIR="/var/lib/etcd" ETCD_INITIAL_CLUSTER_STATE="new" ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster-01" ETCD_INITIAL_CLUSTER="controller=http://10.0.0.11:2380" ETCD_INITIAL_ADVERTISE_PEER_URLS="http://10.0.0.11:2380" ETCD_ADVERTISE_CLIENT_URLS="http://10.0.0.11:2379" ETCD_LISTEN_PEER_URLS="http://0.0.0.0:2380" ETCD_LISTEN_CLIENT_URLS="http://10.0.0.11:2379"
Finalize installation¶
Enable and restart the etcd service:
# systemctl enable etcd # systemctl restart etcd