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10 changes: 6 additions & 4 deletions postgres/README.md
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Expand Up @@ -335,19 +335,21 @@ $ docker run -it --rm --user 1000:1000 -e POSTGRES_PASSWORD=mysecretpassword pos
initdb: could not look up effective user ID 1000: user does not exist
```

The three easiest ways to get around this:
The four easiest ways to get around this:

1. allow the image to use [the `nss_wrapper` library](https://cwrap.org/nss_wrapper.html) to "fake" `/etc/passwd` contents for you (see [docker-library/postgres#448](https://github.com/docker-library/postgres/pull/448) for more details)
1. on the host, use the same UID:GID that the container defines for postgres user/group. These are 999:999 for Debian based containers and 70:70 for Alpine based containers.

2. bind-mount `/etc/passwd` read-only from the host (if the UID you desire is a valid user on your host):
2. allow the image to use [the `nss_wrapper` library](https://cwrap.org/nss_wrapper.html) to "fake" `/etc/passwd` contents for you (see [docker-library/postgres#448](https://github.com/docker-library/postgres/pull/448) for more details)

3. bind-mount `/etc/passwd` read-only from the host (if the UID you desire is a valid user on your host):

```console
$ docker run -it --rm --user "$(id -u):$(id -g)" -v /etc/passwd:/etc/passwd:ro -e POSTGRES_PASSWORD=mysecretpassword postgres
The files belonging to this database system will be owned by user "jsmith".
...
```

3. initialize the target directory separately from the final runtime (with a `chown` in between):
4. initialize the target directory separately from the final runtime (with a `chown` in between):

```console
$ docker volume create pgdata
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