Apache Karaf - I had only heard of it and never had practical exposure to this technology. Main questions in my mind were - What purpose does it serves? and Who uses it?
What is it?#
So it seems that it is an enterprise ready runtime and kind of platform from Apache, and as they officially put it
It supports several frameworks and programming model like REST/API, web, Spring Boot etc.
Architecture#
Some of the Key sub projects are as below
- Karaf runtime
- Karaf Cellar
- Karaf Cave
- Karaf Decanter
Karaf Runtime#
Karaf is a suitable solution powered by OSGi for microservices, systems integration & big data. It can be scaled from a very lightweight container to a fully featured enterprise service.
Some of the key features of Karaf Runtime and typical of any container are as under
1. Support hot deployment#
Drop your applications in the Karaf deploy folder and they will deployed.
2. Dynamic Configuration#
All configurations are located in the Karaf folder and any changes to the configuration are loaded on the fly.
3. Logging System#
Supports popular logging systems like slf4j and log4j. With the current CVE’s of log4j not sure if that is a good support? :-)
Other features are Provisioning, Shell Console, Remote management, Web Console, Security, Instances management, Docker and cloud ready
samarthya apache-karaf-4.4.2 % ./bin/karaf
__ __ ____
/ //_/____ __________ _/ __/
/ ,< / __ `/ ___/ __ `/ /_
/ /| |/ /_/ / / / /_/ / __/
/_/ |_|\__,_/_/ \__,_/_/
Apache Karaf (4.4.2)
Hit '<tab>' for a list of available commands
and '[cmd] --help' for help on a specific command.
Hit '<ctrl-d>' or type 'system:shutdown' or 'logout' to shutdown Karaf.
karaf@root()> version
4.4.2
