docs/standalone-docker.md

---
id: standalone-docker
title: Set up a standalone Pulsar in Docker
sidebar_label: "Run Pulsar in Docker"
---

For local development and testing, you can run Pulsar in standalone mode on your own machine within a Docker container.

## Prerequisites

- [Docker](https://docs.docker.com/get-docker/) (version 20.10+ recommended)
- At least 4GB of available RAM
- At least 5GB of free disk space

## Start Pulsar in Docker

* For macOS, Linux, and Windows:

  ```shell
  docker run -it -p 6650:6650  -p 8080:8080 --mount source=pulsardata,target=/pulsar/data --mount source=pulsarconf,target=/pulsar/conf apachepulsar/pulsar:@pulsar:version@ bin/pulsar standalone
  ```

A few things to note about this command:
 * The data, metadata, and configuration are persisted on Docker volumes to not start "fresh" every
time the container is restarted. For details on the volumes, you can use `docker volume inspect <sourcename>`.
 * For Docker on Windows, make sure to configure it to use Linux containers.
 * The docker container will run as UID 10000 and GID 0, by default. You'll need to ensure the mounted volumes give write permission to either UID 10000 or GID 0. Note that UID 10000 is arbitrary, so it is recommended to make these mounts writable for the root group (GID 0).

If you start Pulsar successfully, you will see `INFO`-level log messages like this:

```
08:18:30.970 [main] INFO  org.apache.pulsar.broker.web.WebService - HTTP Service started at http://0.0.0.0:8080
...
07:53:37.322 [main] INFO  org.apache.pulsar.broker.PulsarService - messaging service is ready, bootstrap service port = 8080, broker url= pulsar://localhost:6650, cluster=standalone, configs=org.apache.pulsar.broker.ServiceConfiguration@98b63c1
...
```

:::tip

When you start a local standalone cluster, a `public/default`

:::

A namespace is created automatically, which is used for development purposes. All Pulsar topics are managed within namespaces.
For more information, see [Topics](concepts-messaging.md#topics).

## Use Pulsar in Docker

Pulsar offers client libraries for [Java](/docs/client-libraries/java), [Go](/docs/client-libraries/go), [Python](/docs/client-libraries/python)
and [C++](/docs/client-libraries/cpp). If you're running a local standalone cluster, you can
use one of these root URLs to interact with your cluster:

* `pulsar://localhost:6650`
* `http://localhost:8080`

The following example will guide you to get started with Pulsar quickly by using the [Python client API](@pulsar:apidoc:python@).

Install the Pulsar Python client library directly from [PyPI](https://pypi.org/project/pulsar-client/):

```shell
pip install pulsar-client
```

### Consume a message

Create a consumer and subscribe to the topic:

```python
import pulsar

client = pulsar.Client('pulsar://localhost:6650')
consumer = client.subscribe('my-topic',
                            subscription_name='my-sub')

while True:
    msg = consumer.receive()
    print("Received message: '%s'" % msg.data())
    consumer.acknowledge(msg)

client.close()
```

### Produce a message

Now start a producer to send some test messages:

```python
import pulsar

client = pulsar.Client('pulsar://localhost:6650')
producer = client.create_producer('my-topic')

for i in range(10):
    producer.send(('hello-pulsar-%d' % i).encode('utf-8'))

client.close()
```

## Get the topic statistics

In Pulsar, you can use REST, Java, or command-line tools to control every aspect of the system.
For details on APIs, refer to [Admin API Overview](admin-api-overview.md).

In the simplest example, you can use curl to probe the stats for a particular topic:

```shell
curl http://localhost:8080/admin/v2/persistent/public/default/my-topic/stats | python -m json.tool
```

The output is something like this:

```json
{
    "msgRateIn": 0.0,
    "msgThroughputIn": 0.0,
    "msgRateOut": 1.8332950480217471,
    "msgThroughputOut": 91.33142602871978,
    "bytesInCounter": 7097,
    "msgInCounter": 143,
    "bytesOutCounter": 6607,
    "msgOutCounter": 133,
    "averageMsgSize": 0.0,
    "msgChunkPublished": false,
    "storageSize": 7097,
    "backlogSize": 0,
    "offloadedStorageSize": 0,
    "publishers": [
        {
            "accessMode": "Shared",
            "msgRateIn": 0.0,
            "msgThroughputIn": 0.0,
            "averageMsgSize": 0.0,
            "chunkedMessageRate": 0.0,
            "producerId": 0,
            "metadata": {},
            "address": "/127.0.0.1:35604",
            "connectedSince": "2021-07-04T09:05:43.04788Z",
            "clientVersion": "2.8.0",
            "producerName": "standalone-2-5"
        }
    ],
    "waitingPublishers": 0,
    "subscriptions": {
        "my-sub": {
            "msgRateOut": 1.8332950480217471,
            "msgThroughputOut": 91.33142602871978,
            "bytesOutCounter": 6607,
            "msgOutCounter": 133,
            "msgRateRedeliver": 0.0,
            "chunkedMessageRate": 0,
            "msgBacklog": 0,
            "backlogSize": 0,
            "msgBacklogNoDelayed": 0,
            "blockedSubscriptionOnUnackedMsgs": false,
            "msgDelayed": 0,
            "unackedMessages": 0,
            "type": "Exclusive",
            "activeConsumerName": "3c544f1daa",
            "msgRateExpired": 0.0,
            "totalMsgExpired": 0,
            "lastExpireTimestamp": 0,
            "lastConsumedFlowTimestamp": 1625389101290,
            "lastConsumedTimestamp": 1625389546070,
            "lastAckedTimestamp": 1625389546162,
            "lastMarkDeleteAdvancedTimestamp": 1625389546163,
            "consumers": [
                {
                    "msgRateOut": 1.8332950480217471,
                    "msgThroughputOut": 91.33142602871978,
                    "bytesOutCounter": 6607,
                    "msgOutCounter": 133,
                    "msgRateRedeliver": 0.0,
                    "chunkedMessageRate": 0.0,
                    "consumerName": "3c544f1daa",
                    "availablePermits": 867,
                    "unackedMessages": 0,
                    "avgMessagesPerEntry": 6,
                    "blockedConsumerOnUnackedMsgs": false,
                    "lastAckedTimestamp": 1625389546162,
                    "lastConsumedTimestamp": 1625389546070,
                    "metadata": {},
                    "address": "/127.0.0.1:35472",
                    "connectedSince": "2021-07-04T08:58:21.287682Z",
                    "clientVersion": "2.8.0"
                }
            ],
            "isDurable": true,
            "isReplicated": false,
            "allowOutOfOrderDelivery": false,
            "consumersAfterMarkDeletePosition": {},
            "nonContiguousDeletedMessagesRanges": 0,
            "nonContiguousDeletedMessagesRangesSerializedSize": 0,
            "durable": true,
            "replicated": false
        }
    },
    "replication": {},
    "deduplicationStatus": "Disabled",
    "nonContiguousDeletedMessagesRanges": 0,
    "nonContiguousDeletedMessagesRangesSerializedSize": 0
}
```