Single-cluster Pulsar installations should be sufficient for all but the most ambitious use cases. If you're interested in experimenting with Pulsar or using it in a startup or on a single team, we recommend opting for a single cluster. If you do need to run a multi-cluster Pulsar instance, however, see the guide here.
If you want to use all builtin Pulsar IO connectors in your Pulsar deployment, you need to download
apache-pulsar-io-connectorspackage and make sure it is installed under
connectorsdirectory in the pulsar directory on every broker node or on every function-worker node if you have run a separate cluster of function workers for Pulsar Functions.
Deploying a Pulsar cluster involves doing the following (in order):
- Deploying a ZooKeeper cluster (optional)
- Initializing cluster metadata
- Deploying a BookKeeper cluster
- Deploying one or more Pulsar brokers
If you already have an existing zookeeper cluster and would like to reuse it, you don't need to prepare the machines for running ZooKeeper.
To run Pulsar on bare metal, you will need:
- At least 6 Linux machines or VMs
- A single DNS name covering all of the Pulsar broker hosts
Each machine in your cluster will need to have Java 8 or higher installed.
Here's a diagram showing the basic setup:
In this diagram, connecting clients need to be able to communicate with the Pulsar cluster using a single URL, in this case
pulsar-cluster.acme.com, that abstracts over all of the message-handling brokers. Pulsar message brokers run on machines alongside BookKeeper bookies; brokers and bookies, in turn, rely on ZooKeeper.
When deploying a Pulsar cluster, we have some basic recommendations that you should keep in mind when capacity planning.
For machines running ZooKeeper, we recommend using lighter-weight machines or VMs. Pulsar uses ZooKeeper only for periodic coordination- and configuration-related tasks, not for basic operations. If you're running Pulsar on Amazon Web Services (AWS), for example, a t2.small instance would likely suffice.
Bookies & Brokers
For machines running a bookie and a Pulsar broker, we recommend using more powerful machines. For an AWS deployment, for example, i3.4xlarge instances may be appropriate. On those machines we also recommend:
- Fast CPUs and 10Gbps NIC (for Pulsar brokers)
- Small and fast solid-state drives (SSDs) or hard disk drives (HDDs) with a RAID controller and a battery-backed write cache (for BookKeeper bookies)
Installing the Pulsar binary package
To get started deploying a Pulsar cluster on bare metal, you'll need to download a binary tarball release in one of the following ways:
- By clicking on the link directly below, which will automatically trigger a download:
- From the Pulsar downloads page
- From the Pulsar releases page on GitHub
- Using wget:
$ wget https://archive.apache.org/dist/incubator/pulsar/pulsar-2.1.1-incubating/apache-pulsar-2.1.1-incubating-bin.tar.gz
Once you've downloaded the tarball, untar it and
cd into the resulting directory:
$ tar xvzf apache-pulsar-2.1.1-incubating-bin.tar.gz $ cd apache-pulsar-2.1.1-incubating
The untarred directory contains the following subdirectories:
|Pulsar's command-line tools, such as |
|Configuration files for Pulsar, including for broker configuration, ZooKeeper configuration, and more|
|The data storage directory used by ZooKeeper and BookKeeper.|
|The JAR files used by Pulsar.|
|Logs created by the installation.|
Installing Builtin Connectors (optional)
2.1.0-incubating, Pulsar releases a separate binary distribution, containing all the
builtinconnectors. If you would like to enable those
builtinconnectors, you can follow the instructions as below; otherwise you can skip this section for now.
To get started using builtin connectors, you'll need to download the connectors tarball release on every broker node in one of the following ways:
by clicking the link below and downloading the release from an Apache mirror:
from the Pulsar downloads page
from the Pulsar releases page
Once the tarball is downloaded, in the pulsar directory, untar the io-connectors package and copy the connectors as
in the pulsar directory:
$ tar xvfz apache-pulsar-io-connectors-2.1.1-incubating-bin.tar.gz // you will find a directory named `apache-pulsar-io-connectors-2.1.1-incubating` in the pulsar directory // then copy the connectors $ mv apache-pulsar-io-connectors-2.1.1-incubating/connectors connectors $ ls connectors pulsar-io-aerospike-2.1.1-incubating.nar pulsar-io-cassandra-2.1.1-incubating.nar pulsar-io-kafka-2.1.1-incubating.nar pulsar-io-kinesis-2.1.1-incubating.nar pulsar-io-rabbitmq-2.1.1-incubating.nar pulsar-io-twitter-2.1.1-incubating.nar ...
Deploying a ZooKeeper cluster
If you already have an exsiting zookeeper cluster and would like to use it, you can skip this section.
ZooKeeper manages a variety of essential coordination- and configuration-related tasks for Pulsar. To deploy a Pulsar cluster you'll need to deploy ZooKeeper first (before all other components). We recommend deploying a 3-node ZooKeeper cluster. Pulsar does not make heavy use of ZooKeeper, so more lightweight machines or VMs should suffice for running ZooKeeper.
zk1.us-west.example.com:2888:3888 =zk2.us-west.example.com:2888:3888 =zk3.us-west.example.com:2888:3888=
On each host, you need to specify the ID of the node in each node's
myid file, which is in each server's
data/zookeeper folder by default (this can be changed via the
See the Multi-server setup guide in the ZooKeeper documentation for detailed info on
On a ZooKeeper server at
zk1.us-west.example.com, for example, you could set the
myid value like this:
$ mkdir -p data/zookeeper $ echo 1 > data/zookeeper/myid
zk2.us-west.example.com the command would be
echo 2 > data/zookeeper/myid and so on.
Once each server has been added to the
zookeeper.conf configuration and has the appropriate
myid entry, you can start ZooKeeper on all hosts (in the background, using nohup) with the
pulsar-daemon CLI tool:
$ bin/pulsar-daemon start zookeeper
Initializing cluster metadata
Once you've deployed ZooKeeper for your cluster, there is some metadata that needs to be written to ZooKeeper for each cluster in your instance. It only needs to be written once.
bin/pulsar initialize-cluster-metadata \ --cluster pulsar-cluster-1 \ --zookeeper zk1.us-west.example.com:2181 \ --configuration-store zk1.us-west.example.com:2181 \ --web-service-url http://pulsar.us-west.example.com:8080 \ --web-service-url-tls https://pulsar.us-west.example.com:8443 \ --broker-service-url pulsar://pulsar.us-west.example.com:6650 \ --broker-service-url-tls pulsar+ssl://pulsar.us-west.example.com:6651
As you can see from the example above, the following needs to be specified:
|A name for the cluster|
|A "local" ZooKeeper connection string for the cluster. This connection string only needs to include one machine in the ZooKeeper cluster.|
|The configuration store connection string for the entire instance. As with the |
|The web service URL for the cluster, plus a port. This URL should be a standard DNS name. The default port is 8080 (we don't recommend using a different port).|
|If you're using TLS, you'll also need to specify a TLS web service URL for the cluster. The default port is 8443 (we don't recommend using a different port).|
|A broker service URL enabling interaction with the brokers in the cluster. This URL should use the same DNS name as the web service URL but should use the |
|If you're using TLS, you'll also need to specify a TLS web service URL for the cluster as well as a TLS broker service URL for the brokers in the cluster. The default port is 6651 (we don't recommend using a different port).|
Deploying a BookKeeper cluster
BookKeeper handles all persistent data storage in Pulsar. You will need to deploy a cluster of BookKeeper bookies to use Pulsar. We recommend running a 3-bookie BookKeeper cluster.
BookKeeper bookies can be configured using the
conf/bookkeeper.conf configuration file. The most important step in configuring bookies for our purposes here is ensuring that the
zkServers is set to the connection string for the ZooKeeper cluster. Here's an example:
Once you've appropriately modified the
zkServers parameter, you can provide any other configuration modifications you need. You can find a full listing of the available BookKeeper configuration parameters here, although we would recommend consulting the BookKeeper documentation for a more in-depth guide.
Since Pulsar 2.1.0 release, Pulsar introduces stateful function for Pulsar Functions. If you would like to enable that feature, you need to enable table service on BookKeeper by setting following setting in
Once you've applied the desired configuration in
conf/bookkeeper.conf, you can start up a bookie on each of your BookKeeper hosts. You can start up each bookie either in the background, using nohup, or in the foreground.
To start the bookie in the background, use the
pulsar-daemon CLI tool:
$ bin/pulsar-daemon start bookie
To start the bookie in the foreground:
$ bin/bookkeeper bookie
You can verify that a bookie is working properly by running the
bookiesanity command for the BookKeeper shell on it:
$ bin/bookkeeper shell bookiesanity
This will create an ephemeral BookKeeper ledger on the local bookie, write a few entries, read them back, and finally delete the ledger.
After you have started all the bookies, you can use
simpletest command for BookKeeper shell on any bookie node, to
verify all the bookies in the cluster are up running.
$ bin/bookkeeper shell simpletest --ensemble <num-bookies> --writeQuorum <num-bookies> --ackQuorum <num-bookies> --numEntries <num-entries>
This command will create a
num-bookies sized ledger on the cluster, write a few entries, and finally delete the ledger.
Deploying Pulsar brokers
Pulsar brokers are the last thing you need to deploy in your Pulsar cluster. Brokers handle Pulsar messages and provide Pulsar's administrative interface. We recommend running 3 brokers, one for each machine that's already running a BookKeeper bookie.
The most important element of broker configuration is ensuring that that each broker is aware of the ZooKeeper cluster that you've deployed. Make sure that the
configurationStoreServers parameters. In this case, since we only have 1 cluster and no configuration store setup, the
configurationStoreServers will point to the same
You also need to specify the cluster name (matching the name that you provided when initializing the cluster's metadata:
Enabling Pulsar Functions (optional)
If you want to enable Pulsar Functions, you can follow the instructions as below:
conf/broker.confto enable function worker, by setting
pulsarFunctionsClusterto the cluster name that you provided when initializing the cluster's metadata.
You can then provide any other configuration changes that you'd like in the
conf/broker.conf file. Once you've decided on a configuration, you can start up the brokers for your Pulsar cluster. Like ZooKeeper and BookKeeper, brokers can be started either in the foreground or in the background, using nohup.
You can start a broker in the foreground using the
pulsar broker command:
$ bin/pulsar broker
You can start a broker in the background using the
pulsar-daemon CLI tool:
$ bin/pulsar-daemon start broker
Once you've succesfully started up all the brokers you intend to use, your Pulsar cluster should be ready to go!
Connecting to the running cluster
Once your Pulsar cluster is up and running, you should be able to connect with it using Pulsar clients. One such client is the
pulsar-client tool, which is included with the Pulsar binary package. The
pulsar-client tool can publish messages to and consume messages from Pulsar topics and thus provides a simple way to make sure that your cluster is runnning properly.
To use the
pulsar-client tool, first modify the client configuration file in
conf/client.conf in your binary package. You'll need to change the values for
localhost (which is the default), with the DNS name that you've assigned to your broker/bookie hosts. Here's an example:
Once you've done that, you can publish a message to Pulsar topic:
$ bin/pulsar-client produce \ persistent://public/default/test \ -n 1 \ -m "Hello, Pulsar"
You may need to use a different cluster name in the topic if you specified a cluster name different from
This will publish a single message to the Pulsar topic.
If you have enabled Pulsar Functions, you can also tryout pulsar functions now.
Create a ExclamationFunction
bin/pulsar-admin functions create \ --jar examples/api-examples.jar \ --className org.apache.pulsar.functions.api.examples.ExclamationFunction \ --inputs persistent://public/default/exclamation-input \ --output persistent://public/default/exclamation-output \ --tenant public \ --namespace default \ --name exclamation
Check if the function is running as expected by triggering the function.
bin/pulsar-admin functions trigger --name exclamation --triggerValue "hello world"
You will see output as below: