[dm-devel] [Question] multipathd.service start failed when /var/run isn't mount

[lixiaokeng]

When we enable multipathd.service with systemctl and reboot,
multipathd doesn't start and log "failed to create pidfile".

The reason is following:

The RUN is /var/run in multipath-tools. When we start linux, we
mount a disk to /var. So if multipathd.service start before mount,
it will fail to activate.(If mount firstly, multipathd will start
successfully)

The RUN is defined in Makefile.inc:

ifndef RUN
        ifeq ($(shell test -L /var/run -o ! -d /var/run && echo 1),1)
                RUN=run
        else
                RUN=var/run
        endif
endif

Can it always be defined as run?

Regards,
Lixiaokeng