s6 - process supervision (DIY init)

[Alad]

This is probably the edbrowse of the init world. It's not a "real" init, it does "service supervision" (e.g, see if processes crash). Apparently this is different from "service management". ;)

It uses its own obscure language, execline, and in fact recommends you to write the "actual" init in it. It might however work with sinit or similar.

http://skarnet.org/software/s6/index.html

If you get it working, post a scrot! (only try on test setups, of course). The reward is the 2nd-best-tasting-cookie-in-the-whole-entire-world.

[fbt]

s6 is not an init nor is it a DYI kit for one. It is a set of tools for process supervision.

[rhowaldt]

^ sooo... if it indeed recommends you write your own init in it (ha-HA!), doesn't that mean it is more than just tools for process supervision? or am i misunderstanding something here?

[Alad]

s6 is not an init nor is it a DYI kit for one. It is a set of tools for process supervision.

I said it's not an init. As to DYI:

http://www.skarnet.org/software/s6/s6-svscan-1.html

And where's the scrot? Don't see one attached to your post.

[rhowaldt]

^ the information in that link is so useful, i linked it on the wiki: http://linuxbbq.org/wiki/index.php/Init
i finally have the idea i understand init-systems a bit more, and i think Alad is right in what he said, both meaning and phrasing.

still curious to hear whether this further explanation still does not jive with fbt's idea of s6.

[Alad]

Init, not innit.

:D :D

[fbt]

>It becomes clear now that s6-svscan is perfectly suited to exactly fulfill process 1's role during stage 2.
As is a very simple bash script. Don't read a lot into that.

>if it indeed recommends you write your own init in it (ha-HA!), doesn't that mean it is more than just tools for process supervision?
They are recommending to write your init in execline, and leveraged by their tools. execline is a scripting language.

All of this doesn't directly translate into “s6 is a DYI kit for your init”; otherwise, you would have to call every tool(set) that is suitable for this task a “DYI kit for init”. That's just dumb.
Their site is a DYI howto though.

[rhowaldt]

^ that is true, but i think this comes down to what you read into Alad's first post. you read it as saying 'it is a DIY kit for your init', i read it as 'it is possible to use this to DIY an init'. obviously i am not Alad and thus not sure which he meant, but i dont think it really matters that much.

thanks for explaining, for anyone who might have gotten confused like myself :)

[Alad]

i dont think it really matters that much.

Yes. Semantics like this remind of a certain other forum. And for the record, I meant the "it is possible to ...".

[simgin]

Ok, guys , please calm down ;) A few more replies and this will turn into a cat fight!


simon

PS: and not the cat fight that MB wants to see ;)

[machinebacon]

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