On 10/16/2018 10:27 AM, Jonathan Billings wrote:
On Tue, Oct 16, 2018 at 09:25:15AM -0500, Valeri Galtsev wrote:
Also, it is likely that at some point systemd-free Linux distribution(s) may fade away.
There was already a move away from SysV init before systemd was introduced, heck RHEL6/CentOS6 used Upstart instead of SysV. There are always going to be projects with a diverse set of tools, it just depends on how many people care about it. Turns out, not that many people care about maintaining a SysV init (or other init) distro.
I'm not sure that that necessarily follows. Among RH-ecosystem distributions, and specifically RHEL derivatives, there's a barrier to the usefulness of smaller projects given that a large chunk of the users need binary-compatible commercial equivalents, or at least vaguely commercially supported ecosystems. We're long past the days where WBEL and other hobbyist projects can probably gain traction. Those RHEL alternatives that do exist either have a long history (CentOS, even before the RH deal), or are supported by large entities: the government (SL, before it became more or less congruent with CentOS), a multi billion dollar company (OEL), or a trillion dollar company (AWS). SuSE Enterprise might be the best counter example here.
Also, while EL6 did move from original init to upstart, that's somewhat beside the point. Almost none of the advanced features from upstart were used, and - crucially - the startup sequence was still handled with grokkable, imperative scripts. The jump from EL6->EL7 was night and day compared to EL5->EL6.
-jc