I’m very pleased to announce Finit v4.2! It comes seven months after the last release, v4.1, with a bunch of fixes and some new features. See the release notes for details.
One of the most notable fixes is legacy support for old vendor kernels that do not yet support cgroups v2 – this is now detected and disabled automatically by Finit.
Another neat feature is the support for early logging, using the
kernel ring buffer, before any syslog daemon has started. This
support is synchronized with the sysklogd v2.3 release which adds
support for extracting non-kernel log messages from
other syslog daemons support this too, but sysklogd is the recommended
syslog with Finit.
Try before you buy!
If you’re interesting in trying Finit out yourself, but haven’t got the time or patience to set it up. Here is a x86_64 VM image for QEMU on, based on myLinux.
- Download myLinux-2.0-dev.tar.xz
(13 MiB, expands to 62 MiB; Fint v4.2)
Note: this is an example, with a limited number of services included. To use in a full-blown production system, you can quickly build your own image from a myLinux base. I recommend the Buildroot manual for help on how to extract the full potential of your system.
To start it up:
- Ensure you have QEMU installed, this varies depending on your preferred Linux distribution, on Linux Mint and other Debian derivatives:
sudo apt install qemu-system-x86
- Download the image and untar it:
cd ~/Downloads tar xf myLinux-2.0-dev.tar.xz
- Run the
qemu.shscript, you can modify it to suit your needs:
cd myLinux-2.0-dev ./qemu.sh
You should see the bootstrap messages and a message at the end:
Please press Enter to activate this console.
Ctrl-a x – exit Qemu
Ctrl-a c – toggle Qemu console/monitor
No getty is spawned unless a user is active at the console, which in
most headless deployments there isn’t. Let’s pretend we’re servicing
this devie, and press enter – you are presented with a login prompt.
The default username is
root and for the first time login there is
To allow SSH login, you must set a password, use
passwd. When set
you can connect to the QEMU virtual machine using:
ssh -p 2222 root@localhost
Now you’re settled in and it’s time to get to know Finit. Play around
a bit with
initctl, it comes with limited built-in help
initctl help, and there is much documentation available online, including man pages: initctl(8), finit(8), and finit.conf(5).
Try stopping and starting services. For instance, check the status of
sntpd service, notice the condition on a default route – check
what happens when you remove the default route.
More on conditions in another blog post.
Have fun! :-)