Re: sslmode - detecting local docker

With docker or podman you can list the networks and inspect them one by one
to get their subnets. This information could then be used in pg_hba.conf.

E.g. using podman , docker should be the same except name of the command:

$ podman network ls
NETWORK ID NAME DRIVER
2f259bab93aa podman bridge
$podman inspect 2f259bab93aa
...
"subnets": [
{
"subnet": "SOME_IP_NET/SOME_MASK",
"gateway": "SOME_IP_ADDR"
}
],
...

Am Mo., 13. Apr. 2026 um 16:09 Uhr schrieb AJ Weber <aweber(at)comcast(dot)net>:

> I'm trying to configure my custom JDBC connection to be as safe as
> practical.
>
> Years gone by, I would simply check if the URL (configured-property) had
> "localhost" in it, and do nothing. Recently I decided I'd check for
> localhost AND see if any "ssl" was explicitly already set in the URL.
> If not, I tried adding ssl=true as a connection param. This fails when
> using a postgresql docker container, because they typically are not
> configured for SSL, but the hostname is also not "localhost".
>
> Besides changing my logic to add "sslmode=prefer" (instead of "true",
> which may be the default anyway), does anyone have a good way to
> determine if the JDBC URL is actually a docker container running on the
> same host?
>
> Currently running v16.x, but these modes haven't changed in a long time,
> so I suppose this question applies across currently supported versions.
>
> Thanks in advance,
>
> AJ
>
>
>
>