--- page_title: Docker discovery page_description: discovery page_keywords: docker, clustering, discovery --- # Discovery Docker comes with multiple Discovery backends. ## Backends ### Using etcd Point your Docker Engine instances to a common etcd instance. You can specify the address Docker uses to advertise the node using the `--cluster-advertise` flag. ```bash $ dockerd -H=<node_ip:2376> --cluster-advertise=<node_ip:2376> --cluster-store etcd://<etcd_ip1>,<etcd_ip2>/<path> ``` ### Using consul Point your Docker Engine instances to a common Consul instance. You can specify the address Docker uses to advertise the node using the `--cluster-advertise` flag. ```bash $ dockerd -H=<node_ip:2376> --cluster-advertise=<node_ip:2376> --cluster-store consul://<consul_ip>/<path> ``` ### Using zookeeper Point your Docker Engine instances to a common Zookeeper instance. You can specify the address Docker uses to advertise the node using the `--cluster-advertise` flag. ```bash $ dockerd -H=<node_ip:2376> --cluster-advertise=<node_ip:2376> --cluster-store zk://<zk_addr1>,<zk_addr2>/<path> ```