---
title: Run etcd clusters inside containers
weight: 4200
description: Running etcd with Docker using static bootstrapping
---
The following guide shows how to run etcd with Docker using the [static bootstrap process](../clustering/#static).

## Docker

In order to expose the etcd API to clients outside of Docker host, use the host IP address of the container. Please see [`docker inspect`](https://docs.docker.com/engine/reference/commandline/inspect) for more detail on how to get the IP address. Alternatively, specify `--net=host` flag to `docker run` command to skip placing the container inside of a separate network stack.

### Running a single node etcd

Use the host IP address when configuring etcd:

```
export NODE1=192.168.1.21
```

Configure a Docker volume to store etcd data:

```
docker volume create --name etcd-data
export DATA_DIR="etcd-data"
```

Run the latest version of etcd (`{{< param git_version_tag >}}` at the time of
writing):

```
ETCD_VERSION={{< param git_version_tag >}}
REGISTRY=quay.io/coreos/etcd
# available from v3.2.5
REGISTRY=gcr.io/etcd-development/etcd

docker run \
  -p 2379:2379 \
  -p 2380:2380 \
  --volume=${DATA_DIR}:/etcd-data \
  --name etcd ${REGISTRY}:${ETCD_VERSION} \
  /usr/local/bin/etcd \
  --data-dir=/etcd-data --name node1 \
  --initial-advertise-peer-urls http://${NODE1}:2380 --listen-peer-urls http://0.0.0.0:2380 \
  --advertise-client-urls http://${NODE1}:2379 --listen-client-urls http://0.0.0.0:2379 \
  --initial-cluster node1=http://${NODE1}:2380
```

List the cluster member:

```
etcdctl --endpoints=http://${NODE1}:2379 member list
```

### Running a 3 node etcd cluster

```
REGISTRY=quay.io/coreos/etcd
# available from v3.2.5
REGISTRY=gcr.io/etcd-development/etcd

# For each machine
ETCD_VERSION={{< param git_version_tag >}}
TOKEN=my-etcd-token
CLUSTER_STATE=new
NAME_1=etcd-node-0
NAME_2=etcd-node-1
NAME_3=etcd-node-2
HOST_1=10.20.30.1
HOST_2=10.20.30.2
HOST_3=10.20.30.3
CLUSTER=${NAME_1}=http://${HOST_1}:2380,${NAME_2}=http://${HOST_2}:2380,${NAME_3}=http://${HOST_3}:2380
DATA_DIR=/var/lib/etcd

# For node 1
THIS_NAME=${NAME_1}
THIS_IP=${HOST_1}
docker run \
  -p 2379:2379 \
  -p 2380:2380 \
  --volume=${DATA_DIR}:/etcd-data \
  --name etcd ${REGISTRY}:${ETCD_VERSION} \
  /usr/local/bin/etcd \
  --data-dir=/etcd-data --name ${THIS_NAME} \
  --initial-advertise-peer-urls http://${THIS_IP}:2380 --listen-peer-urls http://0.0.0.0:2380 \
  --advertise-client-urls http://${THIS_IP}:2379 --listen-client-urls http://0.0.0.0:2379 \
  --initial-cluster ${CLUSTER} \
  --initial-cluster-state ${CLUSTER_STATE} --initial-cluster-token ${TOKEN}

# For node 2
THIS_NAME=${NAME_2}
THIS_IP=${HOST_2}
docker run \
  -p 2379:2379 \
  -p 2380:2380 \
  --volume=${DATA_DIR}:/etcd-data \
  --name etcd ${REGISTRY}:${ETCD_VERSION} \
  /usr/local/bin/etcd \
  --data-dir=/etcd-data --name ${THIS_NAME} \
  --initial-advertise-peer-urls http://${THIS_IP}:2380 --listen-peer-urls http://0.0.0.0:2380 \
  --advertise-client-urls http://${THIS_IP}:2379 --listen-client-urls http://0.0.0.0:2379 \
  --initial-cluster ${CLUSTER} \
  --initial-cluster-state ${CLUSTER_STATE} --initial-cluster-token ${TOKEN}

# For node 3
THIS_NAME=${NAME_3}
THIS_IP=${HOST_3}
docker run \
  -p 2379:2379 \
  -p 2380:2380 \
  --volume=${DATA_DIR}:/etcd-data \
  --name etcd ${REGISTRY}:${ETCD_VERSION} \
  /usr/local/bin/etcd \
  --data-dir=/etcd-data --name ${THIS_NAME} \
  --initial-advertise-peer-urls http://${THIS_IP}:2380 --listen-peer-urls http://0.0.0.0:2380 \
  --advertise-client-urls http://${THIS_IP}:2379 --listen-client-urls http://0.0.0.0:2379 \
  --initial-cluster ${CLUSTER} \
  --initial-cluster-state ${CLUSTER_STATE} --initial-cluster-token ${TOKEN}
```

To run `etcdctl` using API version 3:

```
docker exec etcd /usr/local/bin/etcdctl put foo bar
```

## Bare Metal

To provision a 3 node etcd cluster on bare-metal, the examples in the [baremetal repo](https://github.com/coreos/coreos-baremetal/tree/master/examples) may be useful.

## Mounting a certificate volume

The etcd release container does not include default root certificates. To use HTTPS with certificates trusted by a root authority (e.g., for discovery), mount a certificate directory into the etcd container:

```
ETCD_VERSION={{< param git_version_tag >}}
REGISTRY=quay.io/coreos/etcd
# available from v3.2.5
REGISTRY=docker://gcr.io/etcd-development/etcd

rkt run \
  --insecure-options=image \
  --volume etcd-ssl-certs-bundle,kind=host,source=/etc/ssl/certs/ca-certificates.crt \
  --mount volume=etcd-ssl-certs-bundle,target=/etc/ssl/certs/ca-certificates.crt \
  ${REGISTRY}:${ETCD_VERSION} -- --name my-name \
  --initial-advertise-peer-urls http://localhost:2380 --listen-peer-urls http://localhost:2380 \
  --advertise-client-urls http://localhost:2379 --listen-client-urls http://localhost:2379 \
  --discovery https://discovery.etcd.io/c11fbcdc16972e45253491a24fcf45e1
```

```
ETCD_VERSION={{< param git_version_tag >}}
REGISTRY=quay.io/coreos/etcd
# available from v3.2.5
REGISTRY=gcr.io/etcd-development/etcd

docker run \
  -p 2379:2379 \
  -p 2380:2380 \
  --volume=/etc/ssl/certs/ca-certificates.crt:/etc/ssl/certs/ca-certificates.crt \
  ${REGISTRY}:${ETCD_VERSION} \
  /usr/local/bin/etcd --name my-name \
  --initial-advertise-peer-urls http://localhost:2380 --listen-peer-urls http://localhost:2380 \
  --advertise-client-urls http://localhost:2379 --listen-client-urls http://localhost:2379 \
  --discovery https://discovery.etcd.io/86a9ff6c8cb8b4c4544c1a2f88f8b801
```