From: | Ekaterina Amez <ekaterina(dot)amez(at)zunibal(dot)com> |
---|---|
To: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
Cc: | pgsql-admin(at)lists(dot)postgresql(dot)org |
Subject: | Re: Files overwritten when installing v9.6 in machine with v8.4 previously running |
Date: | 2019-10-01 14:01:22 |
Message-ID: | e250622e-9fed-ec5e-534f-f2baaa8eb072@zunibal.com |
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Thread: | |
Lists: | pgsql-admin |
Tom, you've pointed me the right way: setting unix_socket_directory was
the answer. Having a look at v9.6 config, this parameter is set as:
unix_socket_directories = '/var/run/postgresql, /tmp'
I've finally pg_upgrade my test server from v8.4 to v9.6.
Thank you all for your suggestions.
El 30/9/19 a las 16:47, Tom Lane escribió:
> Ekaterina Amez <ekaterina(dot)amez(at)zunibal(dot)com> writes:
>> I first thought they were going to be installed in their own
>> directories, but I'm starting to think that I'm missing something during
>> instalation process or maybe I'm missing something at deeper level
>> (probably lack of knowledge about linux and postgres). The thing is
>> after installing v9.6, having both versions running, I can't connect to
>> the older one and I'm having the message: "no such file or directory.
>> Is the server running locally and accepting connections on Unix domain
>> socket "/var/run/postgresql/.s.PGSQL.5432"?".
> This is probably a case of confusion about where the Unix socket file is.
> There are competing standards about that: as we ship it, that file will
> be in /tmp, but some Linux vendors make it be /var/run/postgresql because
> of filesystem layout rules. You are evidently using a libpq that was
> built to default to /var/run/postgresql --- and since we can see that
> you have a postmaster running on port 5432, it must have put its socket
> file somewhere else, which I'm going to jump to the conclusion is /tmp.
>
> You can override the client's default socket directory via something
> like
>
> psql -h /tmp ...
>
> A better long-term fix might be to change the postmaster's
> unix_socket_directory(ies) setting to agree with what the
> updated client library expects.
>
> regards, tom lane
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