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Using Vagrant to Develop Cockpit

category: tutorial
Starting with Cockpit release 0.79 you can use Vagrant to bring up a VM in whichyou can test or develop Cockpit. The VM is isolated from your main system so any system configurationyou change via Cockpit will only happen in the VM.The Vagrant VM mounts the Cockpit package assets from...

Cockpit 0.77 Released

category: release
  • Componentizing Cockpit
  • The URLs changed
  • Authentication when Embedding Cockpit
  • Deleting and Adjusting Kubernetes Objects
  • Warning when too many machines
  • From the Future

Making REST calls from Javascript in Cockpit

category: tutorial
Not all of the system APIs use DBus. So sometimes we find ourselves in a situation where we have to use REST (which is often just treated as another word for HTTP) to talk to certain parts of the system. For example Docker has a REST API.For this tutorial you’ll...

Cockpit's Kubernetes Dashboard

category: release
Here’s a video showing what I’ve been working on together with some help from a couple Cockpit folks. It’s a Cockpit dashboard for Kubernetes.If you haven’t heard about Kubernetes … it’s a way to schedule docker containers across a cluster of machines, and take care of their networking, storage, name...

Protocol for Web access to System APIs

category: tutorial
A Linux system today has a lot of local system configuration APIs. I’m not talking about library APIs here, but things like DBus services, command/scripts to be executed, or files placed in various locations. All of these constitute the API by which we configure a Linux system. In Cockpit we...

Cockpit on RHEL Atomic Beta

category: release
If you’ve tried out the RHEL Atomic Host Beta you might notice that Cockpit is not included by default, like it is in the Fedora Atomic or CentOS Atomic. But there’s an easy work around:$ sudo docker run --privileged -v /:/host -d stefwalter/cockpit-atomic:wipThis is an interim solution, and has some...

Using DBus from Javascript in Cockpit

category: tutorial
Much of Cockpit interacts with the server using DBus. We have a powerful yet simple API for doing that, and you should use DBus too when building your own Cockpit user interfaces. For this tutorial you’ll need at least Cockpit 0.41. A few tweaks landed in that release to solve...

DBus is powerful IPC

category: linux
D-Bus is powerful IPC Cockpit is heavily built around DBus. We send DBus over ourWebSocket transport,and marshal them in JSON.DBus is powerful, with lots of capabilities. Not all projects use all of these, but so many ofthese capabilities are what allow Cockpit to implement its UI. Method Call Transactions Object...

Cockpit Multi-Server Dashboard

category: release
Andreas and Marius have been working on implementing a new multi-server dashboard for Cockpit. It’s really looking great.The goal here is that the dash board should work with either one server or several,and give you an overview of what’s going on. Problems that require attention shouldbe highlighted clearly. You should...

Cockpit has Docker pull support

category: release
Cockpit 0.12 now has support for pulling Docker images from theDocker registry.Unfortunately Docker doesn’t have support for cancelling the pull of an image. So thatsort of hampers the UI a bit. At least for now.