Peter Eisentraut wrote: > Max Bowsher wrote: >> Upgrading to the 4.2.2 ntp packages, which merge the ntp-server and >> ntp-simple packages into the ntp package leaves the old packages in >> the 'config-files' state. In particular, this leaves active cron >> scripts under the name 'ntp-server', which are then duplicated by the >> new 'ntp' scripts. This may lead to weird unintentional behaviours as >> various lag rotation jobs are run twice, once by the old, once by the >> new scripts. > > My thought on the cron jobs is that we're going to remove them in the > new package, because logging goes to syslog by default, and there > doesn't seem to be a good reason not to use that anyway, plus we have > requests to use logrotate, which would be a better alternative if we > needed it, which we don't.
OK... meanwhile, having the logs rotated twice as fast is inelegant but not too serious. > The init script might be a bit of an issue because you might have two > init scripts trying to start the same program, but there are interlocks > that should prevent that. The post-upgrade state is exactly that - two init scripts for the same program, both active. Even if there are interlocks, it is still messy. >> Additionally, if an incautious sysadmin was to purge the old >> packages, then the old ntp-simple postinst script will cause serious >> damage to the existing ntp installation, in particular, deleting the >> 'ntp' user, as well as deleting the /var/lib/ntp/ and >> /var/log/ntpstats/ directories. > > My answer to that is that you shouldn't randomly purge packages at > random times. What then, _is_ the proper way to purge packages? I haven't found any way to preview the results of a purge without peeking inside /var/lib/dpkg/info/ . > We could, however, try to document a sequence of steps > to clean up your system after an upgrade. Basically, if you restart > ntp after you purge ntp-server, you should be fine. > > The ntp-simple and ntp-refclock packages can be safely removed at any > time I believe. No, not at all. As I said, the ntp-simple postinst deletes the 'ntp' user account during purge, which the new ntp packages still use. Max.
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