CLI

Karafka has a simple CLI built in. It provides the following commands:

Command	Description
help [COMMAND]	Describe available commands or one specific command
console	Start the Karafka irb console similar to the Rails console (short-cut alias: "c")
info	Print configuration details and other options of your application
install	Installs all required things for Karafka application in current directory
server	Start the Karafka server (short-cut aliases: "s", "consumer")
topics	Allows for topics management (create, delete, repartition, reset, migrate)

All the commands are executed the same way:

bundle exec karafka [COMMAND]

If you need more details about each of the CLI commands, you can execute the following command:

bundle exec karafka help [COMMAND]

Karafka server

Limiting consumer groups used per process

Karafka supports having multiple consumer groups within a single application. You can run multiple Karafka instances, specifying consumer groups that should be running per each process using the --include-consumer-groups server flag as follows:

bundle exec karafka server --include-consumer-groups group_name1 group_name3

If you specify none, by default, all will run.

You can also exclude certain consumer groups by using the --exclude-consumer-groups flag:

bundle exec karafka server --exclude-consumer-groups group_name2

Limiting subscription groups used per process

Karafka supports having multiple subscription groups within a single application. You can run multiple Karafka instances, specifying subscription groups that should be running per each process using the --include-subscription-groups server flag as follows:

bundle exec karafka server --include-subscription-groups group_name1 group_name3

If you specify none, by default, all will run.

You can also exclude certain subscription groups by using the --exclude-subscription-groups flag:

bundle exec karafka server --exclude-subscription-groups group_name2

Limiting topics used per process

Karafka supports having multiple topics within a single application. You can run multiple Karafka instances, specifying topics that should be running per each process using the --include-topics server flag as follows:

bundle exec karafka server --include-topics topic_name1 topic_name3

If you specify none, by default, all will run.

You can also exclude certain topics by using the --exclude-topics flag:

bundle exec karafka server --exclude-topics topic_name2

Declarative Topics

Declarative Topics managament via the CLI has its own section. You can read about that here.

Routing Patterns

Routing Patterns managament via the CLI has its own section. You can read about that here.