Do following actions to reduce the size of the generated images.
- Change `COPY` command + `chown`/`chmod` command to `COPY` command +
`--chown`/`--chmod` option.
To prevent both files before/after `chown`/`chmod` commands from being
recorded on different layers.
- Put all `tdnf` commands in a single `RUN` command and move `tdnf clean all`
command to the end.
To prevent the `tdnf` cache from being recorded on a layer, and the `tdnf`
database from being recorded on multiple layers.
- Add `--link` option to `COPY` command.
This does not contribute to image size reduction, but makes image building
more efficient.
- Move `chown /etc/pki/tls/certs` to the `Dockerfile.base`.
This does not contribute to image size reduction, but is used in
conjunction with `COPY --link` to make image building more efficient.
The target images and their sizes are as follows. (The sizes are the value
when built locally)
- harbor-core : 185MB -> 118MB
- harbor-db : 285MB -> 263MB
- harbor-exporter : 108MB -> 79.1MB
- harbor-jobservice : 159MB -> 105MB
- harbor-registryctl : 160MB -> 104MB
- redis-photon : 179MB -> 170 MB
- standalone-db-migrator : 328MB -> 284MB
Note that harbor-log, harbor-portal, and nginx-photon have almost no effect,
and prepare is not directly executed by the user, so they are not included.
Also, registry-photon and trivy-adapter-photon are not included, since
PR#20622 and PR#20623 include equivalent action for these two, respectively.
Signed-off-by: Mitsuru Kariya <mitsuru.kariya@nttdata.com>
