Connecting and disconnecting remotely

You can connect to a remote Karaf's console using the ssh:ssh command.

karaf@trun> ssh:ssh -l tadmin -P tadmin -p 8101 hostname

To confirm that you have connected to the correct Karaf instance, type shell:info at the karaf> prompt. Information about the currently connected instance is returned, as shown.

Karaf
  Karaf home                  /local/apache-karaf-2.0.0
  Karaf base                  /local/apache-karaf-2.0.0
  OSGi Framework              org.eclipse.osgi - 3.5.1.R35x_v20090827
JVM
  Java Virtual Machine        Java HotSpot(TM) Server VM version 14.1-b02
  ...

The Karaf client allows you to securely connect to a remote Karaf instance without having to launch a Karaf instance locally.

For example, to quickly connect to a Karaf instance running in server mode on the same machine, run the following command from the karaf-install-dir directory: bin/client. More usually, you would provide a hostname, port, username and password to connect to a remote instance. And, if you were using the client within a larger script, you could append console commands as follows:

bin/client -a 8101 -h hostname -u tadmin -p tadmin feature:install wrapper

To display the available options for the client, type:

> bin/client --help
Apache Karaf client
  -a [port]     specify the port to connect to
  -h [host]     specify the host to connect to
  -u [user]     specify the user name
  -p [password] specify the password
  --help        shows this help message
  -v            raise verbosity
  -r [attempts] retry connection establishment (up to attempts times)
  -d [delay]    intra-retry delay (defaults to 2 seconds)
  [commands]    commands to run
If no commands are specified, the client will be put in an interactive mode

You can also connect using a plain SSH client from your *nix system or Windows SSH client like Putty.

~$ ssh -p 8101 tadmin@localhost
            tadmin@localhost's password: 

To disconnect from a remote console, press Ctrl > D, shell:logout or simply logout at the Karaf prompt.