Hi, all. I am using runit to supervise a large set of nearly identical processes. Each process accesses certain IO-bound shared resources (e.g. NFS mount) at startup. At system initialization, when runsvdir is launched, it launches all these processes (via runsv) essentially simultaneously. This causes a big resource contention at initialization that occasionally causes problems.
What I would like is to somehow stagger the startup of the processes, to avoid the resource contention. I could do this by putting a random sleep into the ./run scripts, but this would also cause random startup delays on subsequent process restarts via "sv restart" or the like (which we occasionally need to do). What I would prefer instead is to add random delays to the startup of the *runsv* processes, since this would only apply at system initialization. Unfortunately I can't see any way to do that right now (other than somehow wrapping the runsv binary itself). Does anyone know any way to accomplish what I'm looking for? I don't believe runsvdir supports any options that would apply here. Is it possible to somehow point runsvdir to a alternate runsv executable to which I could add the random delays? Any suggestions would be much appreciated. Thanks. jamie.
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