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Full Discussion: Changing hosting company for one domain, how to deal with DNS?
Top Forums UNIX for Advanced & Expert Users Changing hosting company for one domain, how to deal with DNS? Post 303043362 by Neo on Sunday 26th of January 2020 04:53:47 AM
Old 01-26-2020
Sorry, I don't have any experience with Redirect.pizza or other services because when I do these kind of migrations, I always set the TTL to 5 minutes and and everything works great, especially when the transition is performed when the traffic is at it's lowest point (weekends, holidays, middle of the night, etc) and, of course, the app is running at both the "old" and "new" IP address during that time as well (in the proper mode, normally read only on the "old" IP address, etc).

I'm quite "old school" so there may be a better way than DNS TTL management; but I have never used any these "new school" methods, sorry I cannot be more helpful.

Like I said, I would never use a DNS provider which did not permit us to change the TTL to 300 seconds. 3600 is not acceptable at all for "non trivial" transitions.
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LEARN ABOUT DEBIAN

tinydyndns-update

tinydyndns-update(8)					      System Manager's Manual					      tinydyndns-update(8)

NAME

       tinydyndns-update - update TYPE A record in data.cdb

SYNOPSIS

       tinydyndns-update fqdn dynip

DESCRIPTION

       tinydyndns-update  changes  the data of a TYPE A record in data.cdb in the current directory.  Other than tinydns-data(8), tinydndns-update
       does not know about the source file data but changes the binary database data.cdb directly.

       First tinydyndns-update checks if the given fqdn has a TYPE A record in data.cdb.  Then it checks if the given IP address differs from  the
       one  in	the  TYPE  A record in data.cdb, or if the record's timestamp should be updated.  Finally if data.cdb needs to change, tinydyndns-
       update copies data.cdb to data.tmp, changes the IP address of the TYPE A record of fqdn to dynip in data.tmp, optionally  adjusts  time-to-
       live or time-to-die, and renames data.tmp to data.cdb.

ENVIRONMENT

       TTL    time-to-live.  The environment variable TTL overrides the default time-to-live in seconds (0 if TTD is set, otherwise 5).  If TTL is
	      not set or zero, the time-to-live of the record will not change.	$TTL must be an integer.

       TTD    time-to-die.  $TTD must be an integer, specifying a number of seconds.  If TTD is set, the timestamp of the record  is  set  to  the
	      current  time  plus  $TTD  seconds,  and TTL is set to zero by default, so that tinydns(8) interpretes the timestamp as time-to-die.
	      Note: you probably want to adjust SOA ttl, or create a wildcard record, to prevent DNS caches from caching nxdomain, when using this
	      feature.

       LOC    location.  $LOC must be two characters long.  If LOC is set, it specifies the client location for records to be updated.

EXIT CODES

       If tinydyndns-update cannot find a TYPE A record for fqdn in data.cdb, it prints a warning and exits 114.

       If  dynip  does not differ from the IP address of the TYPE A record of fqdn in data.cdb, and the environment variable TTD is not set, tiny-
       dyndns-update prints a note and exits 0.

       tinydyndns-update exits 100 if it has trouble opening data.cdb, and leaves data.cdb unchanged.

       tinydyndns-update exits 111 on temporary error, and leaves data.cdb unchanged.

       If data.cdb was changed successfully, tinydyndns-update exits 0.

FILES

	./data.cdb
	./data.tmp

SEE ALSO

       tinydyndns-data(8), tinydyndns-conf(8)

       http://smarden.org/tinydyndns/

AUTHOR

       Gerrit Pape <pape@smarden.org>

															      tinydyndns-update(8)
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