Dear Christoph, Please find my answers below.
Le mer. 9 août 2023 à 22:05, Christoph Moench-Tegeder <c...@burggraben.net> a écrit : > ## GF (phab...@gmail.com): > > And now that I checked it: I do have systems with gethostname() > returning an FQDN, and other systems return the (short) hostname > only. The return of gethostname() depends on what has been configured. So, yes some people will prefer a FQDN while others will prefer a short hostname. Also, it's a POSIX standard function (see https://pubs.opengroup.org/onlinepubs/9699919799/), so I don't get why getting a FQDN or a short name depending on what people set would be a problem for Postgres while it's not for Linux. > And it gets worse when you're talking "container" and > "automatic image deployment". So I believe it's a good thing when > a database does not expose too much of the OS below it... > > I respectfully disagree. Containers still have a hostname: for example, by default, docker uses their container id. (see https://docs.docker.com/network/). In fact, the Open Container Initiative defines the hostname as a runtime configuration parameter (see https://github.com/opencontainers/runtime-spec/blob/main/config.md): > Hostname > > - *hostname* (string, OPTIONAL) specifies the container's hostname as > seen by processes running inside the container. On Linux, for example, this > will change the hostname in the container > > <https://github.com/opencontainers/runtime-spec/blob/main/glossary.md#container-namespace> > UTS > namespace <http://man7.org/linux/man-pages/man7/namespaces.7.html>. > Depending on your namespace configuration > > <https://github.com/opencontainers/runtime-spec/blob/main/config-linux.md#namespaces>, > the container UTS namespace may be the runtime > > <https://github.com/opencontainers/runtime-spec/blob/main/glossary.md#runtime-namespace> > UTS > namespace <http://man7.org/linux/man-pages/man7/namespaces.7.html>. > > Example > > "hostname": "mrsdalloway" > > Have a nice day, Lætitia
