Docker build error (rsnapshot missing in Bullseye)

[xezpeleta]

Official PHP docker images have been upgraded to Debian Bullseye.

As Rsnapshot is not available in Debian Bullseye, the apt-get install rsnapshot command from the Dockerfile will fail with the current php:7.3-apache base layer.

A quick solution could be to use the php:7.3-apache-buster image instead.

But if we want to move to Bullseye, we should download and install Rsnapshot debian package:

Download URL: http://ftp.de.debian.org/debian/pool/main/r/rsnapshot/rsnapshot_1.4.2-1_all.deb
SHA256 checksum: d49470c4700aba2b00187d6ff68781f869856ff1ef9aa98dcd73b672ffffa866

[antton]

Hi Xabi,

Why don't you try to ADD the .deb file and make the dpkg installation in the dockerfile?

ADD http://foo.com/package.tar.bz2 /tmp/ RUN tar -xjf /tmp/package.tar.bz2 \ && make -C /tmp/package \ && rm /tmp/package.tar.bz2

This is just an example with a tar.bz2.

Let me know!

El lun, 6 sept 2021 a las 22:44, Xabi @.***>) escribió:

Official PHP docker images have been upgraded to Debian Bullseye.

As Rsnapshot is not available in Debian Bullseye, the apt-get install rsnapshot command from the Dockerfile will fail with the current php:7.3-apache base layer.

A quick solution could be to use the php:7.3-apache-buster image instead.

But if we want to move to Bullseye, we should download and install Rsnapshot debian package:

Download URL: http://ftp.de.debian.org/debian/pool/main/r/rsnapshot/rsnapshot_1.4.3-2_all.deb SHA256 http://ftp.de.debian.org/debian/pool/main/r/rsnapshot/rsnapshot_1.4.3-2_all.debSHA256 checksum: 846ac933b4e3a62d67c390e4ef7c5dbfb8e8ae3e1dd267fbf842365b99e0d002

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[elacunza]

I guess rsnapshot package in Debian archive will disappear some day (when Buster security support is ended I guess...). I think this will be in about 4 years, for now it seems enough :)

[xezpeleta]

Hi @antton !!

By the moment I fixed the issue using the php buster image, as this was the base layer we were using in our production image until now.

Why don't you try to ADD the .deb file and make the dpkg installation in the dockerfile?

do you mean using the ADD statement instead of downloading and installing rsnapshot with a signle RUN command?

I don't know if it's a good idea. I've read the following from the "Best practices for writing Dockerfiles":

Because image size matters, using ADD to fetch packages from remote URLs is strongly discouraged; you should use curl or wget instead. That way you can delete the files you no longer need after they’ve been extracted and you don’t have to add another layer in your image. For example, you should avoid doing things like:

ADD https://example.com/big.tar.xz /usr/src/things/ RUN tar -xJf /usr/src/things/big.tar.xz -C /usr/src/things RUN make -C /usr/src/things all

https://docs.docker.com/develop/develop-images/dockerfile_best-practices/#add-or-copy

Thanks!!