With upgrade to Alpine 3.13, support for `hash:` and `btree:` has
beenremoved from Alpine.
As such `hash:<file>` references do not work any more.
[Alpine](https://wiki.alpinelinux.org/wiki/Release_Notes_for_Alpine_3.13.0)
explains it like this:
> Oracle has changed the license of BDB to AGPL-3.0, making it unsuitable
> to link to packages with GPL-incompatible licenses. Since the old version
> is no longer maintained, the db package is now deprecated. Alpine Linux
> packages are being transitioned to alternatives or, where no alternatives
> exist, removed entirely.
This, unfortunately, will mean that the new version of `docker-postfix`
might not be backwards-compatible, if you're using your own postfix
configuration. Sorry. :-(
The postfix configuration was a bit too permissive with `mynetworks`.
This commit:
- adds `reject` at the end of `*restrictions` list
- adds tests for this feature
Private keys generated with `DKIM_AUTOGENERATE` were created with
the root account and as such were not readable by OpenDKIM.
This fix will reown the created files to the `opendkim` user.
While quite annoying behavour, this is the how `postconf` works.
If you tell it to comment out a command, it will add it to the config
even when the same command exists commented out in the config file.
This commit does a bit of sed and grep magic to find if the comment
already exists and if yes, then it does nothing.
Apparently using sleep with very large numbers is not a good idea
when your image can be compiled down to 32-bit platforms.
This fix uses `sleep infinity` and -- failing that -- tries to
sleep for about 68 years (which is exactly 2^15 seconds).
- It's now possible to choose the logging type - either 'plain' or
'json'
- The code is ready to support multiple integration tests (with
different configurations)
- `OPENDKIM_` and `POSTFIX_` variables are handled properly and recorded
in the corresponding files. (This had a downfall that `bash` now needs
to be installed, so we can probably simplify some of the shell
scripts.)
Summary
^^^^^^^
This commit refactors the code base to be more manageble and
prepares the groundwork for tests.
Refactoring
^^^^^^^^^^^
Files are now moved to subdirectories, all for the sole purpose of
easier management. Tests live in their own folders, as well as configs
and other files.
Test framework
^^^^^^^^^^^^^^
Two new important scripts/directories are available:
- `unit-tests.sh` / `/unit-test` which executes unit tests across shell
scripts, and
- `integration-test.sh` / `integration-tests`, which spins up the
container and tries to send the email.
Both tests use the [BATS](https://github.com/sstephenson/bats) framework
for testing. To create a new test, simply drop a `.bats` file into a
corresponding directory.
Functions have been extracted into `common-run.sh`, to be able to test
them independently.
DKIM_SELECTOR
^^^^^^^^^^^^^
It is now possible to specify a DKIM selector to use (instead of
the default "mail"). See `README.md` for more details.
JSON logging
^^^^^^^^^^^^
WIP: rsyslog will now output JSON logs. This is especially important
if you plan on deploying the image into Kubernetes, as [Prometheus](https://prometheus.io/)
can handle logs in JSON much easier.
TODO: Make this an optional feature, to not confuse existing users.
