Andreas, thanks for your reply.
I try to set up synchronous streaming replication as try-out. I use my
laptop with Debian 9 and PostgreSQL package 10+189.pgdg90+1. And of
this PostgreSQL installation I have two clusters main (master) and
main2 (hot standby). I tried with Rigg's book and the PostgreSQL
documentation and some pages on the web, but fail miserably.
you have one cluster with 2 nodes ;-)
Ähm, right. Been more in a hurry than I thought as it shows below as well.
Note: it's a bad idea to build a synchronous cluster with only 2 nodes,
you need at least 3 nodes
I am aware that synchronous clustering might deadlock the master. To
have a hot standby on the same metal does not make much sense either.
This is just a try out though. The proof of me being stupid, so to
speak. ;-)
that's the recovery.conf, not pg_hba.conf. And you don't need it on the
master.
Copy paste blunder (see above ;-))
standby_mode = 'off'
primary_conninfo = 'host=localhost user=repuser port=5433
password=<md5 value of password>'
restore_command = 'false'
why that?
Uhm, cannot remember *blush*, I removed it but it made no difference.
master or standby? confused...
C&p blunder again. Standby.
standby_mode = 'on'
primary_conninfo = 'host=localhost user=repuser port=5433
password=<md5 value of password>'
the same port as above?
I keep repeating myself: C&p blunder again: nope
1) I am not sure whether to put the md5 value of the repuser password
into primary conninfo or the plain one. I don't feel the documentation
or the book is clear on that.
Anyone two dimes on that?
2) Starting the clusters, I do not see any attempt of the hot standby
to connect to the master.
I put logging back to more sane info as debug did not give me any
useful information on that (maybe due to my noobdom). But I cannot see
any connection attempt...
are the 2 nodes running on different ports?
Yes, 5432 master, 5433 standby
You need only 1 recovery.conf, on the standby.
But does it hurt? I just had the idea that role change would be
easier. master <-> standby
restore_command = 'false'
is useless, i'm guessing that's the reason that the standby doesn't
connect to the master.
Uhm, is it useless or does it prevent connection? Anyway, I removed it
and it did not make a difference.
Greetings from Dresden, Andreas
:-) Greetings from Bannholz@Hochrhein :-D
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