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Real-time notifications from systemd to Slack

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Re: Real-time notifications from systemd to Slack

#11

Post by fnord123 »

Curious42 wrote: post #9

Is Systemd a nohup equivalent? If it is, then what's the benefit of using one over the other?

nohup just runs a process that will ignore SIGHUP.

systemd can also run processes that ignore SIGHUP. But systemd does a lot of things that nohup doesn't do. Please don't attempt to use nohup as a daemon management system for anything but the noddiest of tasks.

If you're going to use anything, you're probably best choosing from this list:

https://en.wikipedia.org/wiki/Operating_system_service_manag...

Re: Real-time notifications from systemd to Slack

#12

Post by maccard »

lorenzhs wrote: post #5

Not to be overly nitpicky here but it's spelled "systemd", not "SystemD". From its website: Yes, it is written systemd, not system D or System D, or even SystemD. And it isn't system d either. Why? Because it's a system daemon, and under Unix/Linux those are in lower case, and get suffixed with a lower case d. And since systemd manages the system, it's called systemd. It's that simple. https://www.freedesktop.org/wik…

if you're not being overly nitpicky, what are you being? if you'd clicked on the article you would have seen that the mistake was only in the HN submission title, and not in the title.

Re: Real-time notifications from systemd to Slack

#13

Post by arjie »

Can anyone who's used systemd share what it's like to have it for process management? We use monit, and it's all right, but I occasionally wonder.

Does anyone run it also as a separate user to manage certain applications? So that you could have certain people log on and operate some things and others operate other things?

Re: Real-time notifications from systemd to Slack

#15

Post by qznc »

I'm currently building something similar for matrix instead of slack. My idea was to clone the mail(1) interface, but tee(1) is also a nice idea!

In the process, I also discovered sendxmpp, which provides mail(1) for XMPP. It does not support encryption and is written in Perl, so I am building my own.

Re: Real-time notifications from systemd to Slack

#16

Post by [deleted] »

arjie wrote: post #13

Can anyone who's used systemd share what it's like to have it for process management? We use monit, and it's all right, but I occasionally wonder. Does anyone run it also as a separate user to manage certain applications? So that you could have certain people log on and operate some things and others operate other things?

[deleted]

Re: Real-time notifications from systemd to Slack

#17

Post by jon-wood »

praveshjain wrote: post #14

I don't understand. How is it better than using HTTP POST to post to the slack channel yourself?

It doesn't require changing the underlying systems that are being managed, giving it a lot more flexibility. So long as the service can log to STDOUT it can be integrated with Slack.

Re: Real-time notifications from systemd to Slack

#18

Post by hornetblack »

arjie wrote: post #13

Can anyone who's used systemd share what it's like to have it for process management? We use monit, and it's all right, but I occasionally wonder. Does anyone run it also as a separate user to manage certain applications? So that you could have certain people log on and operate some things and others operate other things?

systemd has --user option, which makes it a service manager for a particular user, if that's what you mean. I used it for some time to run an emacs daemon. (until I found that it closed between logouts and changed to using the system manager isntead)

Re: Real-time notifications from systemd to Slack

#19

Post by geocar »

arjie wrote: post #13

Can anyone who's used systemd share what it's like to have it for process management? We use monit, and it's all right, but I occasionally wonder. Does anyone run it also as a separate user to manage certain applications? So that you could have certain people log on and operate some things and others operate other things?

Yes.

I used to use runit/daemontools/inittab. My favourite thing about systemd is that it is increasingly available, and while it has it's faults, it has instances (macros you can use to kickoff a fleet of services easily) and pretty good isolation features.

It also has a "systemctl-over-ssh" feature which is quite nice, and which allows you to use an .ssh/authorized_keys file instead of sudo to allow access to certain administrative tasks.

Re: Real-time notifications from systemd to Slack

#20

Post by arjie »

geocar wrote: post #19
arjie wrote: post #13

Can anyone who's used systemd share what it's like to have it for process management? We use monit, and it's all right, but I occasionally wonder. Does anyone run it also as a separate user to manage certain applications? So that you could have certain people log on and operate some things and others operate other things?

Yes. I used to use runit/daemontools/inittab. My favourite thing about systemd is that it is increasingly available, and while it has it's faults, it has instances (macros you can use to kickoff a fleet of services easily) and pretty good isolation features. It also has a "systemctl-over-ssh" feature which is quite nice, and which allows you to use an .ssh/authorized_keys file instead of sudo to allow access to certa…

Interesting. Thank you! Would you mind sharing some of the faults? By instances, are you referring to template unit files like this[0]? Do you use it with the `--user` option or do you just access it with `sudo systemctl`?

0: https://fedoramagazine.org/systemd-template-unit-files/

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