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Re: What is elegant way to do configuration on server app

References <CAEKwp_FsbbAOrBm1h-CE1PS358pJBadJqNDi1CN7upC_s3nqCw@mail.gmail.com> <mailman.189.1427360350.10327.python-list@python.org> <mf19qa$ii6$2@reader1.panix.com> <mailman.236.1427444902.10327.python-list@python.org> <mf40g8$8kd$1@reader1.panix.com>
Date 2015-03-28 03:36 +1100
Subject Re: What is elegant way to do configuration on server app
From Chris Angelico <rosuav@gmail.com>
Newsgroups comp.lang.python
Message-ID <mailman.272.1427474172.10327.python-list@python.org> (permalink)

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On Sat, Mar 28, 2015 at 3:28 AM, Grant Edwards <invalid@invalid.invalid> wrote:
> I presume that automagically reading them any time they changed was
> both too much hassle and possibly dangerous: if a file is being
> edited, it might get saved in intermediate (broken) states during the
> editing session.

Even more so if you have multiple files (look, for instance, at
PostgreSQL configs, where you might make simultaneous and connected
changes to several related files); if you change one and it's
activated before you change another, it might even have security
implications - although more likely, it'd cause an outage (when legit
connections get rejected because you haven't yet added the permission
lines).

The same problem occurs with PHP-based web sites, but there you don't
get the option of holding over for a SIGHUP, so you're just stuck with
uploading a new version of your site file-by-file, or *maybe*
attempting an atomic rename of a directory. If you're lucky.

ChrisA

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Re: What is elegant way to do configuration on server app Ben Finney <ben+python@benfinney.id.au> - 2015-03-26 19:59 +1100
  Re: What is elegant way to do configuration on server app Grant Edwards <invalid@invalid.invalid> - 2015-03-26 15:49 +0000
    Re: What is elegant way to do configuration on server app Jerry OELoo <oyljerry@gmail.com> - 2015-03-27 16:28 +0800
      Re: What is elegant way to do configuration on server app Grant Edwards <invalid@invalid.invalid> - 2015-03-27 16:28 +0000
        Re: What is elegant way to do configuration on server app Chris Angelico <rosuav@gmail.com> - 2015-03-28 03:36 +1100
          Re: What is elegant way to do configuration on server app Grant Edwards <invalid@invalid.invalid> - 2015-03-27 16:44 +0000
    Re: What is elegant way to do configuration on server app Marko Rauhamaa <marko@pacujo.net> - 2015-03-27 10:47 +0200
      Re: What is elegant way to do configuration on server app Chris Angelico <rosuav@gmail.com> - 2015-03-28 00:12 +1100
        Re: What is elegant way to do configuration on server app Marko Rauhamaa <marko@pacujo.net> - 2015-03-27 15:23 +0200
          Re: What is elegant way to do configuration on server app Chris Angelico <rosuav@gmail.com> - 2015-03-28 00:34 +1100
      Re: What is elegant way to do configuration on server app Grant Edwards <invalid@invalid.invalid> - 2015-03-27 16:30 +0000
        Re: What is elegant way to do configuration on server app Marko Rauhamaa <marko@pacujo.net> - 2015-03-27 18:44 +0200

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