[slurm-users] Slurm version 20.02.0 is now available

[Jeffrey T Frey]

Did you reuse the 20.02 select/cons_res/Makefile.{in,am} in your plugin's source?  You probably will have to re-model your plugin after the select/cray_aries plugin if you need to override those two functions (it also defines its own select_p_job_begin() and doesn't link against libcons_common.la).  Naturally, omitting libcons_common.a from your plugin doesn't help if you use other functions defined in select/common.





> On Feb 26, 2020, at 00:48 , Dean Schulze <dean.w.schulze at gmail.com> wrote:
> 
> There was a major refactoring between the 19.05 and 20.02 code.  Most of the callbacks for select plugins were moved to cons_common.  I have a plugin for 19.05 that depends on two of those callbacks:  select_p_job_begin() and select_p_job_fini().  My plugin is a copy of the select/cons_res plugin, but when I implement those functions in my plugin I get this error because those functions already exist in cons_common:
> 
> /home/dean/src/slurm.versions/slurm-20.02/slurm-20.02.0/src/plugins/select/cons_common/cons_common.c:1134: multiple definition of `select_p_job_begin'; .libs/select_liqid_cons_res.o:/home/dean/src/slurm.versions/slurm-20.02/slurm-20.02.0/src/plugins/select/liqid_cons_res/select_liqid_cons_res.c:559: first defined here
> /usr/bin/ld: ../cons_common/.libs/libcons_common.a(cons_common.o): in function `select_p_job_fini':
> /home/dean/src/slurm.versions/slurm-20.02/slurm-20.02.0/src/plugins/select/cons_common/cons_common.c:1561: multiple definition of `select_p_job_fini'; .libs/select_liqid_cons_res.o:/home/dean/src/slurm.versions/slurm-20.02/slurm-20.02.0/src/plugins/select/liqid_cons_res/select_liqid_cons_res.c:607: first defined here
> collect2: error: ld returned 1 exit status
> 
> Since only one select plugin can be used at a time (determined in slurm.conf) I could put my code in the cons_common implementation of those functions, but if I ever switch plugins then my plugin code will get executed when it shouldn't be.
> 
> How can I "override" those callbacks in my own plugin?  This isn't Java (but it sure looks like the slurm code tries to do Java in C).
> 
> 
> On Tue, Feb 25, 2020 at 11:57 AM Tim Wickberg <tim at schedmd.com> wrote:
> After 9 months of development and testing we are pleased to announce the 
> availability of Slurm version 20.02.0!
> 
> Downloads are available from https://www.schedmd.com/downloads.php.
> 
> Highlights of the 20.02 release include:
> 
> - A "configless" method of deploying Slurm within the cluster, in which 
> the slurmd and user commands can use DNS SRV records to locate the 
> slurmctld host and automatically download the relevant configuration files.
> 
> - A new "auth/jwt" authentication mechanism using JWT, which can help 
> integrate untrusted external systems into the cluster.
> 
> - A new "slurmrestd" command/daemon which translates a new Slurm REST 
> API into the underlying libslurm calls.
> 
> - Packaging fixes for RHEL8 distributions.
> 
> - Significant performance improvements to the backfill scheduler, as 
> well as to string construction and processing.
> 
> Thank you to all customers, partners, and community members who 
> contributed to this release.
> 
> As with past releases, the documentation available at 
> https://slurm.schedmd.com has been updated to the 20.02 release. Past 
> versions are available in the archive. This release also marks the end 
> of support for the 18.08 release. The 19.05 release will remain 
> supported up until the 20.11 release in November, but will not see as 
> frequent updates, and bug-fixes will be targeted for the 20.02 
> maintenance releases going forward.
> 
> -- 
> Tim Wickberg
> Chief Technology Officer, SchedMD
> Commercial Slurm Development and Support
>