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Manual Install using Systemd on Ubuntu and Debian¶
This topic provides instructions for installing a production-ready Confluent Platform configuration in a multi-node Ubuntu or Debian environment with a replicated ZooKeeper ensemble.
With this installation method, you connect to every node manually to run the Confluent Platform installation commands.
You must complete these steps for each node in your cluster.
- Before installing Confluent Platform, your environment must have the following software and hardware requirements.
Get the Software¶
The APT repositories provide packages for Debian-based Linux distributions such as Debian and Ubuntu. You can install
individual Confluent Platform packages or the entire platform. For a list of available packages, see the documentation
or you can search the repository (
apt-cache search <package-name>).
Beginning in November 2020, Confluent disables deprecated/insecure TLS 1.0 and TLS 1.1 protocols on https://packages.confluent.io.
TLS 1.2 is supported in Java 7, but disabled by default in releases lower than 131. If you are on Java 7, release lower than 131, you might not be able to establish a secure connection to https://packages.confluent.io. Your options are:
- Upgrade to Java 7, release 131, or higher.
- Add the
-Dhttps.protocols=TLSv1.2JVM argument to force Java 7 JVM to upgrade to the TLS 1.2 protocol.
Install the Confluent public key. This key is used to sign the packages in the APT repository.
wget -qO - https://packages.confluent.io/deb/4.1/archive.key | sudo apt-key add -
Your output should resemble:
Add the repository to your
/etc/apt/sources.listby running this command:
sudo add-apt-repository "deb [arch=amd64] https://packages.confluent.io/deb/4.1 stable main"
Update apt-get and install the entire Confluent Platform platform.
sudo apt-get update && sudo apt-get install confluent-platform-2.11
Confluent Open Source:
sudo apt-get update && sudo apt-get install confluent-platform-oss-2.11
The package name contains the Confluent Platform version followed by the Scala version. For example,
4.1.2-2.11.zipdenotes Confluent Platform version 4.1.2 and Scala version 2.11.
Your output should resemble:
... Setting up confluent-schema-registry (4.1.2-1) ... Notice: Not creating existing directory /var/log/confluent, ensure proper permissions for user cp-schema-registry group confluent Notice: If you are planning to use the provided systemd service units for Notice: confluent-schema-registry, make sure that read-write permissions Notice: for user cp-schema-registry and group confluent are set up according to the Notice: following commands: chown cp-schema-registry:confluent /var/log/confluent && chmod u+wx,g+wx,o= /var/log/confluent Setting up confluent-support-metrics (4.1.2-1) ... Setting up confluent-platform-2.11 (4.1.2-1) ...
Configure Confluent Platform¶
Configure Confluent Platform with the individual component properties files. By default these are located in
<path-to-confluent>/etc/. You must minimally configure the following components.
These instructions assume you are running ZooKeeper in replicated mode. A minimum of three servers are required for replicated mode, and you must have an odd number of servers for failover. For more information, see the ZooKeeper documentation.
Navigate to the ZooKeeper properties file (
/etc/kafka/zookeeper.properties) file and modify as shown.
tickTime=2000 dataDir=/var/lib/zookeeper/ clientPort=2181 initLimit=5 syncLimit=2 server.1=zoo1:2888:3888 server.2=zoo2:2888:3888 server.3=zoo3:2888:3888 autopurge.snapRetainCount=3 autopurge.purgeInterval=24
This configuration is for a three node ensemble. This configuration file should be identical across all nodes in the ensemble.
clientPortare all set to typical single server values. The
syncLimitgovern how long following ZooKeeper servers can take to initialize with the current leader and how long they can be out of sync with the leader. In this configuration, a follower can take 10000 ms to initialize and can be out of sync for up to 4000 ms based on the
tickTimebeing set to 2000ms.
server.*properties set the ensemble membership. The format is
myidis the server identification number. There are three servers that each have a different
myidis set by creating a file named
dataDirthat contains a single integer in human readable ASCII text. This value must match one of the
myidvalues from the configuration file. You will see an error if another ensemble member is already started with a conflicting
leaderportis used by followers to connect to the active leader. This port should be open between all ZooKeeper ensemble members.
electionportis used to perform leader elections between ensemble members. This port should be open between all ZooKeeper ensemble members.
autopurge.purgeIntervalhave been set to purge all but three snapshots every 24 hours.
Navigate to the the ZooKeeper log directory (e.g.,
/var/lib/zookeeper/) and create a file named
myidfile consists of a single line that contains the machine ID in the format
'<machine-id>'. When the ZooKeeper server starts up, it knows which server it is by referencing the
myidfile. For example, server 1 will have this myid value.
In a production environment, multiple brokers are required. During startup brokers register themselves in ZooKeeper to become a member of the cluster.
Navigate to the Kafka properties file (
/etc/kafka/server.properties) and customize the following:
Connect to the same ZooKeeper ensemble by setting the
zookeeper.connectin all nodes to the same value. Replace all instances of
localhostto the hostname or FQDN (fully qualified domain name) of your node. For example, if your hostname is
Configure the broker IDs for each node in your cluster using one of these methods.
Dynamically generate the broker IDs: add
broker.id.generation.enable=trueand comment out
broker.id. For example:
############################# Server Basics ############################# # The id of the broker. This must be set to a unique integer for each broker. #broker.id=0 broker.id.generation.enable=true
Manually set the broker IDs: set a unique value for
broker.idon each node.
Configure how other brokers and clients communicate with the broker using
listeners, and optionally
listeners: Comma-separated list of URIs and listener names to listen on.
advertised.listeners: Comma-separated list of URIs and listener names for other brokers and clients to use. The
advertised.listenersparameter ensures that the broker advertises an address that is accessible from both local and external hosts.
Navigate to the Control Center properties file (
/etc/confluent-control-center/control-center.properties) and customize the following:
# host/port pairs to use for establishing the initial connection to the Kafka cluster bootstrap.servers=<hostname1:port1,hostname2:port2,hostname3:port3,...> # location for Control Center data confluent.controlcenter.data.dir=/var/lib/confluent-control-center # the Confluent license confluent.license=<your-confluent-license> # ZooKeeper connection string with host and port of a ZooKeeper servers zookeeper.connect=<hostname1:port1,hostname2:port2,hostname3:port3,...>
This configuration is for a three node multi-node cluster. For more information, see Control Center configuration details.
Navigate to the Kafka server configuration file (
/etc/kafka/server.properties) and enable Confluent Metrics Reporter.
##################### Confluent Metrics Reporter ####################### # Confluent Control Center and Confluent Auto Data Balancer integration # # Uncomment the following lines to publish monitoring data for # Confluent Control Center and Confluent Auto Data Balancer # If you are using a dedicated metrics cluster, also adjust the settings # to point to your metrics Kafka cluster. metric.reporters=io.confluent.metrics.reporter.ConfluentMetricsReporter confluent.metrics.reporter.bootstrap.servers=localhost:9092 # # Uncomment the following line if the metrics cluster has a single broker confluent.metrics.reporter.topic.replicas=1
Add these lines to the Kafka Connect properties file (
/etc/kafka/connect-distributed.properties) to add support for the interceptors.
# Interceptor setup consumer.interceptor.classes=io.confluent.monitoring.clients.interceptor.MonitoringConsumerInterceptor producer.interceptor.classes=io.confluent.monitoring.clients.interceptor.MonitoringProducerInterceptor
Start Confluent Platform¶
Start Confluent Platform and its components using systemd service unit files. You can start immediately by using the
systemctl start command or enable for automatic startup by using the
systemctl enable command. These instructions
use the syntax for immediate startup.
ZooKeeper, Kafka, and Schema Registry must be started in this specific order, and must be started before any other components.
sudo systemctl start confluent-zookeeper
sudo systemctl start confluent-kafka
Start Schema Registry.
sudo systemctl start confluent-schema-registry
Start other Confluent Platform components as desired.
sudo systemctl start confluent-control-center
sudo systemctl start confluent-kafka-connect
Kafka REST Proxy
sudo systemctl start confluent-kafka-rest
sudo systemctl start confluent-ksql
You can check service status with this command:
systemctl status confluent*. For more information
about the systemd service unit files, see Using Confluent Platform systemd Service Unit Files.
Run this command to remove Confluent Platform, where
<component-name> is either
(Confluent Enterprise) or
confluent-platform-oss-2.11 (Confluent Open Source).
sudo apt-get remove <component-name>
For example, run this command to remove Confluent Enterprise:
sudo apt-get remove confluent-platform-2.11
Your output should resemble:
(Reading database ... 79286 files and directories currently installed.) Removing confluent-platform-2.11 (4.1.2-1) ...