[ZODB-Dev] ZEO and pidfiles

[John Belmonte]

Chris McDonough wrote:
> There is a "start.py" in the ZEO directory which looks like it tries to
> import the (ancient) zdaemon.Daemon package and writes a pid file and
> all that jazz, but I'm not sure under what circumstance (if any) it's
> supposed to be used.

It wouldn't be a good idea to depend on the start.py script, as it's 
been removed from the development tree.

> If that's not used (there is also a "runzeo.py" script which is I think
> is what zdctl calls), ZEO doesn't write a pidfile nor does
> zeoctl/zdctl.  ZEO should likely be responsible for writing a pidfile. 
> This follows Zope's pattern and would allow rc script writers to do what
> Alan says.  It looks like runzeo already handles signals, so sending the
> child process a signal should (ha ha) do the right thing.

I agree-- zdrun should support writing a pid file.  The zdctl utility is 
useful, but not much help for incorporating ZEO into existing daemon 
frameworks.

-John


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