Etcd for RHEL and CentOS¶
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 package:
# yum install etcd
/etc/etcd/etcd.conffile and set the
ETCD_LISTEN_CLIENT_URLSto the management IP address of the controller node to enable access by other nodes via the management network:
#[Member] ETCD_DATA_DIR="/var/lib/etcd/default.etcd" ETCD_LISTEN_PEER_URLS="http://10.0.0.11:2380" ETCD_LISTEN_CLIENT_URLS="http://10.0.0.11:2379" ETCD_NAME="controller" #[Clustering] ETCD_INITIAL_ADVERTISE_PEER_URLS="http://10.0.0.11:2380" ETCD_ADVERTISE_CLIENT_URLS="http://10.0.0.11:2379" ETCD_INITIAL_CLUSTER="controller=http://10.0.0.11:2380" ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster-01" ETCD_INITIAL_CLUSTER_STATE="new"
Enable and start the etcd service:
# systemctl enable etcd # systemctl start etcd