Ubuntu 上的 etcd

Openstack服务可以使用Etcd，Etcd是一个高可用的键值存储系统，主要用于键锁、存储配置和服务发等场景。

The etcd service runs on the controller node.

安装并配置组件

1. 安装 ``etcd``包

   # apt install etcd
   

   备注

   As of Ubuntu 18.04, the etcd package is no longer available from the default repository. To install successfully, enable the Universe repository on Ubuntu.

2. 编辑``/etc/etcd/etcd.conf``配置``ETCD_INITIAL_CLUSTER``, ETCD_INITIAL_ADVERTISE_PEER_URLS, ETCD_ADVERTISE_CLIENT_URLS, ETCD_LISTEN_CLIENT_URLS 为控制节点的管理IP，使其他节点可以通过管理网络来访问。

   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"
   

完成安装

1. Enable and restart the etcd service:

   # systemctl enable etcd
   # systemctl restart etcd